IDEA 2016.3.3 + JRebel 7.0.2 + SpringBoot 1.4.3 + SpringBoot的插件
这个模式下，Jrebel模式重新编译代码，会导致PageHelper的分页查询直接失效。
目前在多台机器上都100%存在这个问题。

支持人数达到一定程度后，我会考虑。

不需要或者不支持的不建议留言！

谢谢大家的回复，计划在5.1版本增加以前的排序功能，在这中间可能还有1，2个5.0.x的小版本。

显示用户列表的时候想同时显示用户所属的所有公司名称，所以用了 LEFT JOIN 来实现一对多，目前结合该插件分页查询后总的条数和单独执行 SQL 的结果是一样的「但是希望分页的时候能按左表来计算分页属性，该插件能通过某种配置来实现这种一对多的查询吗？」

您好，最近在做一个项目，采用Sping+SpringMVC+MyBatis，数据库采用informix，其中也引入了您的开源项目PageHelper。
调用时我观察了一下总条数的查询语句，SELECT count(0) FROM company WHERE 1 = 1 AND companyid = ? 。count(0)的写法在informix数据里是不支持的，所以我在测试时，SQL部分直接报错，
==> Preparing: SELECT count(0) FROM company WHERE 1 = 1 AND companyid = ?
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@ea04cb]
[org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]
[org.springframework.jdbc.support.SQLErrorCodesFactory] - SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase]
五月 08, 2017 3:28:59 下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet rpReport threw exception
java.sql.SQLException
at com.informix.util.IfxErrMsg.getSQLException(IfxErrMsg.java:373)
at com.informix.jdbc.IfxSqli.E(IfxSqli.java:3523)
at com.informix.jdbc.IfxSqli.dispatchMsg(IfxSqli.java:2353)
at com.informix.jdbc.IfxSqli.receiveMessage(IfxSqli.java:2269)
at com.informix.jdbc.IfxSqli.executePrepare(IfxSqli.java:1153)
at com.informix.jdbc.IfxPreparedStatement.e(IfxPreparedStatement.java:318)
at com.informix.jdbc.IfxPreparedStatement.a(IfxPreparedStatement.java:298)
at com.informix.jdbc.IfxPreparedStatement.(IfxPreparedStatement.java:168)
at com.informix.jdbc.IfxSqliConnect.h(IfxSqliConnect.java:5918)
at com.informix.jdbc.IfxSqliConnect.prepareStatement(IfxSqliConnect.java:1999)
at org.apache.commons.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:248)
at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:302)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.ibatis.logging.jdbc.ConnectionLogger.invoke(ConnectionLogger.java:54)
at com.sun.proxy.$Proxy34.prepareStatement(Unknown Source)
at org.apache.ibatis.executor.statement.PreparedStatementHandler.instantiateStatement(PreparedStatementHandler.java:75)
at org.apache.ibatis.executor.statement.BaseStatementHandler.prepare(BaseStatementHandler.java:85)
at org.apache.ibatis.executor.statement.RoutingStatementHandler.prepare(RoutingStatementHandler.java:57)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:73)
at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59)
at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267)
at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96)
at com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:112)
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:60)
at com.sun.proxy.$Proxy33.query(Unknown Source)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358)
at com.sun.proxy.$Proxy21.selectList(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:198)
at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:119)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:63)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
at com.sun.proxy.$Proxy31.select(Unknown Source)
at com.picc.service.impl.CompanyServiceImpl.select(CompanyServiceImpl.java:21)
at com.picc.controller.CompanyController.select(CompanyController.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:745)

例如：List query(@param("params") PaymentRequestParams paymentRequestParams);

打印出来的sql语句，其中的LIMIT1,5有两次，导致sql报错

select * from t_weike   
  WHERE  `published` = ?   
    AND `publish_user_id` = ?  
    AND `deleted` = ?
    ORDER BY id desc LIMIT 1,5 LIMIT 1,5

我的环境：

• Mysql 5.6
• SpringBoot
• Maven

其中pom.xml配置如下：

       <!--mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!--mybatis 分页插件-->
        <!--mapper-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>1.1.0</version>
        </dependency>
        <!--pagehelper-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.1.0</version>
        </dependency>
        <!--mybatis 分页插件 end -->

Spring的applicationContext.xml配置如下：

    <!-- mybatis 配置 start -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:mybatis/*.xml"/>
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>reasonable=true</value>
                    </property>
                </bean>
            </array>
        </property>
    </bean>
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.benmei.weike.dao"/>
    </bean>
    <!-- mybatis 配置 end/ -->

Java代码如下：

        PageRowBounds pageRowBounds = new PageRowBounds(1, 5);
        List<Weike> list = weikeDao.searchWeike(weike,pageRowBounds);
        long total = pageRowBounds.getTotal();

PageHelper.startPage(1,5);
mapper.executeSql(String sqlStr);//此sql语句是动态传入的，mapper.xml文件写法是${sqlStr}。执行后确实分页了。
PageHelper.clearPage();
mapper.select1(pagram1);//但是这个普通的select 语句都也被分页了。mapper.xml文件写法是select * from **
mapper.select2(pagram1);//这个普通的select 语句都也被分页了。
mapper.select3(pagram1);//这个普通的select 语句都也被分页了。
而我只想分页一次,即让executeSql分页，不想让select1,select2,select3分页。怎么办？
加上PageHelper.clearPage()；也不行。

 int offset = 0;
        boolean isLast = false;

        while (!isLast) {
            PageHelper.offsetPage(offset, LIMIT);
            PageInfo<Gjc> pageInfo = new PageInfo<>(gjcMapper.getGjcs());
            for (Gjc gjc : pageInfo.getList()) {
                redisService.set(GJC.concat(gjc.getGjc()), String.valueOf(gjc.getBh()));
            }
            isLast = pageInfo.isIsLastPage();
            offset = offset + LIMIT;
        }

代码如上
gjcMapper.getGjcs()
数据库一条数据都没有，取回的时候
isLast = pageInfo.isIsLastPage(); 的标志位始终为false

错误信息

org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'distinct' in 'class com.dhcc.mis.pub.product.entity.ProductEntity'
	at org.apache.ibatis.reflection.Reflector.getGetInvoker(Reflector.java:381)
	at org.apache.ibatis.reflection.MetaClass.getGetInvoker(MetaClass.java:164)
	at org.apache.ibatis.reflection.wrapper.BeanWrapper.getBeanProperty(BeanWrapper.java:162)
	at org.apache.ibatis.reflection.wrapper.BeanWrapper.get(BeanWrapper.java:49)
	at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:122)
	at org.apache.ibatis.scripting.xmltags.DynamicContext$ContextMap.get(DynamicContext.java:94)
	at org.apache.ibatis.scripting.xmltags.DynamicContext$ContextAccessor.getProperty(DynamicContext.java:108)
	at org.apache.ibatis.ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2420)
	at org.apache.ibatis.ognl.ASTProperty.getValueBody(ASTProperty.java:114)
	at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
	at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258)
	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:494)
	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:458)
	at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:44)
	at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:32)
	at org.apache.ibatis.scripting.xmltags.IfSqlNode.apply(IfSqlNode.java:34)
	at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:33)
	at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:41)
	at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:279)
	at com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:80)
	at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61)
	at com.sun.proxy.$Proxy77.query(Unknown Source)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:120)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:113)
	at sun.reflect.GeneratedMethodAccessor360.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:354)
	at com.sun.proxy.$Proxy22.selectList(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:194)
	at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:122)
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:64)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
	at com.sun.proxy.$Proxy37.selectByExample(Unknown Source)
	at com.dhcc.mis.pub.product.service.ProductService.getProductList(ProductService.java:35)

调用：

 PageHelper.offsetPage(prod.getStart(),prod.getLength()); 

        List<ProductEntity> list = mapper.selectByExample(prod);

 public String selectByExample(MappedStatement ms) {
        Class<?> entityClass = getEntityClass(ms);
        //将返回值修改为实体类型
        setResultType(ms, entityClass);
        StringBuilder sql = new StringBuilder("SELECT ");
        sql.append("<if test=\"distinct\">distinct</if>");
        //支持查询指定列

这里 我的ProductEntity没有distinct 这里会报错
使用版本：
pagehelper-5.0.0.jar
mybatis-3.3.1.jar
mapper-3.3.6.jar

这是POM：
<dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.1.0</version> </dependency>

	`<dependency>
	    <groupId>tk.mybatis</groupId>
	    <artifactId>orderby-helper</artifactId>
	    <version>0.0.1</version>
	</dependency>`

分页+排序代码片段：
PageHelper.startPage(pageBean.getPage(),pageBean.getRows()); //添加排序字段 OrderByHelper.orderBy(baseEntity.getSort()+" "+baseEntity.getOrder());

还有 MyBatis.xml的配置： <plugins> <!-- 分页插件或其他插件，OrderBy 一定要在分页插件下面（主要是为了避免 count 也被增加排序） --> <plugin interceptor="tk.mybatis.orderbyhelper.OrderByHelper"/> </plugins>

结果是没排序

Mybatis-PageHelper 怎么可以使用AOP监控到执行的SQL语句？

想支持Teradata数据库的分页，如何自定义一个Parser

我在开发API的时候，需要给客户端返回json，而且要包括分页信息，但是PageInfo类的信息太多了，我并不想全部给客户端显示，而Page类又无法被转化为json，有没有什么办法解决下？还是说我只能重新写一个类来包装一下

在使用mysql5.7版本的fulltext查询时 count语句变成了
select count(0) from (select * from table WHERE MATCH (text) AGAINST (? IN BOOLEAN MODE)) tmp_count
未使用fulltext全文检索查询时count语句为
SELECT count(0) FROM table

为什么fulltext全文检索的count语句不能直接是
SELECT count(0) FROM table WHERE MATCH (text) AGAINST (? IN BOOLEAN MODE)) 感觉这样效率更高

    val p = PageRowBounds(0, 10)
    val users = userDao.pageSearch(p)
    users.forEach { println(it.username) }
    println(p)
    val total = p.total
    if (total == null) {
        println(0)
    } else {
        println(total)
    }
    println("+++++++++++++++++++++++++++++")

输出如下

test1395990298
test-181769175
com.github.pagehelper.PageRowBounds@232bdc3d
0
+++++++++++++++++++++++++++++

why?

使用的版本是4.2.1

SQL: select count(0) from (select S.ID, S.NAME, S.STATION_CODE, S.POSITION_CODE, S.ADDRESS, S.PHONE, S.LONGITUDE, S.LATITUDE, S.CREATE_DATE ,U.FULL_NAME as YWY_NAME from SERVICE_STATIONS S LEFT JOIN YWY_IN_STATION Y ON S.ID = Y.STATION_ID LEFT JOIN USERS U ON U.ID = Y.USER_ID WHERE S.NAME LIKE "%"?"%" order by S.id) tmp_count

Cause: java.sql.SQLSyntaxErrorException: ORA-00907: 缺失右括号

5.0 版本 不支持 PageHelper.setOrderBy 方法了？升级后要改好多代码啊

# 如图所示，目前我是克隆项目程序在本地添加别名后能正常使用，烦请下个版本修复此问题，谢谢。

使用javaconfig方式配置的话,应该怎么配置,不用xml

Hi
I am trying to add PageHelper to my [Sping - SpringMVC - MyBatis] project.
But some errors happened. Can you tell me why. Thanks in advance.

五月 02, 2017 11:40:35 下午 org.apache.catalina.core.StandardContext listenerStart
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in file [D:\Software\apache-tomcat-8.0.36\webapps\joker\WEB-INF\classes\config\spring\applicationContext-dao.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse config resource: class path resource [config/mybatis/SqlMapConfig.xml]; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.lang.ClassCastException: com.github.pagehelper.PageHelper cannot be cast to org.apache.ibatis.plugin.Interceptor
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1583)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:732)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4842)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5303)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1092)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1834)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: org.springframework.core.NestedIOException: Failed to parse config resource: class path resource [config/mybatis/SqlMapConfig.xml]; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.lang.ClassCastException: com.github.pagehelper.PageHelper cannot be cast to org.apache.ibatis.plugin.Interceptor
at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:499)
at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:381)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1642)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1579)
... 25 more
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.lang.ClassCastException: com.github.pagehelper.PageHelper cannot be cast to org.apache.ibatis.plugin.Interceptor
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:120)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:98)
at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:493)
... 28 more
Caused by: java.lang.ClassCastException: com.github.pagehelper.PageHelper cannot be cast to org.apache.ibatis.plugin.Interceptor
at org.apache.ibatis.builder.xml.XMLConfigBuilder.pluginElement(XMLConfigBuilder.java:182)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:109)
... 30 more
五月 02, 2017 11:40:35 下午 org.apache.catalina.core.ApplicationContext log

this is mybatis config file:

this is the DAO config file for spring

<!-- 数据库连接池 -->
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:config/resource/database.properties" />
<!-- 数据库连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
	destroy-method="close">
	<property name="url" value="${jdbc.url}" />
	<property name="username" value="${jdbc.username}" />
	<property name="password" value="${jdbc.password}" />
	<property name="driverClassName" value="${jdbc.driver}" />
	<property name="maxActive" value="10" />
	<property name="minIdle" value="5" />
</bean>
<!-- 配置sqlsessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
	<property name="configLocation" value="classpath:config/mybatis/SqlMapConfig.xml"></property>
	<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置扫描包，加载mapper代理对象 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
	<property name="basePackage" value="com.joker.mapper"></property>
</bean>

使用版本：4.1.6
说明：查看5.0.1版本源码，该部分代码没变，应该也可以重现该bug
异常现场：

### Error querying database.  Cause: java.lang.RuntimeException: 无法处理该类型[class com.github.pagehelper.sqlsource.PageDynamicSqlSource]的SqlSource
### Cause: java.lang.RuntimeException: 无法处理该类型[class com.github.pagehelper.sqlsource.PageDynamicSqlSource]的SqlSource
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:79)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:447)
	at com.sun.proxy.$Proxy72.selectList(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:231)
	at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:128)
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53

重现：
在启一个线程池，进行同一个分页查询操作时，出现RuntimeException，无法处理该类型PageDynamicSqlSource

所用代码如下：

    @Test
    public void search() throws Exception {
        ExecutorService executorService = Executors.newFixedThreadPool(10);
        for(int i = 0;i<10;i++) {
            executorService.submit(new Runnable() {
                @Override
                public void run() {
                    Object result = testService.search(1, new Random().nextInt(1000));
                    logger.info(JSONObject.toJSONString(result));
                }
            });
        }
        executorService.shutdown();
        while(true){
            if(executorService.isTerminated()){
                break;
            }
            Thread.sleep(100);
        }
    }

异常分析：
在SqlUtils方法中有以下处理：

     //判断并处理为PageSqlSource
        if (!isPageSqlSource(ms)) {
            processMappedStatement(ms);
        }

其中：
processMappedStatement方法为：

public void processMappedStatement(MappedStatement ms) throws Throwable {
        SqlSource sqlSource = ms.getSqlSource();
        MetaObject msObject = SystemMetaObject.forObject(ms);
        SqlSource pageSqlSource;
        if (sqlSource instanceof StaticSqlSource) {
            pageSqlSource = new PageStaticSqlSource((StaticSqlSource) sqlSource);
        } else if (sqlSource instanceof RawSqlSource) {
            pageSqlSource = new PageRawSqlSource((RawSqlSource) sqlSource);
        } else if (sqlSource instanceof ProviderSqlSource) {
            pageSqlSource = new PageProviderSqlSource((ProviderSqlSource) sqlSource);
        } else if (sqlSource instanceof DynamicSqlSource) {
            pageSqlSource = new PageDynamicSqlSource((DynamicSqlSource) sqlSource);
        } else if(sqlSource instanceof PageDynamicSqlSource) {
            pageSqlSource = sqlSource;
        }else {
            throw new RuntimeException("无法处理该类型[" + sqlSource.getClass() + "]的SqlSource");
        }
        msObject.setValue("sqlSource", pageSqlSource);
        //由于count查询需要修改返回值，因此这里要创建一个Count查询的MS
        msCountMap.put(ms.getId(), MSUtils.newCountMappedStatement(ms));
    }

由于processMappedStatement是非线程安全的方法，虽然前面进行过if判断，进入这个方法体后sqlSource对象还是有可能是处理过的PageSqlSource，此时instanceof 判断失败，抛出RuntimeException

建议订正：
在条件判断最后，再进行一次PageSqlSource的判断，如果是，直接返回：

else if(sqlSource instanceof PageSqlSource){
    pageSqlSource  = sqlSource ;
}else {
            throw new RuntimeException("无法处理该类型[" + sqlSource.getClass() + "]的SqlSource");
 }

我遇到当使用 PageHelper.startPage(1, 10); 的方式进行分页查询时，会爆出 ：

数据库是 SQL Server 2014，helperDialect 设置为 sqlserver2012

com.microsoft.sqlserver.jdbc.SQLServerException: Invalid usage of the option NEXT in the FETCH statement.

PageHelper自动生成的：

SELECT
  [num]
FROM vw_app_query_1
WHERE (num LIKE '%' + ? + '%')
ORDER BY [num] 
  FETCH NEXT 10 ROWS ONLY;

可以正确执行的：

SELECT
  [num]
FROM vw_app_query_1
WHERE (num LIKE '%' + '32' + '%')
ORDER BY [num]
  OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY;

主要是缺少了 OFFSET 0 ROWS

返回的pageNum为0，isFirstPage为false;
使用方式：

没搞懂是select全部数据自己循环呢还是
有用到SQL的limit，
毕竟没用到的话效率实在是......担心

我在使用静态方法使下一个select方法分页生效后，得到的list中是po对象，将它们转换为了适用于页面的vo对象list后，放入PageInfo中，也可以分页，但是pageinfo的属性失效了，所以我现在调用两种Service方法，一种返回po，一种封装为vo，因为我只想要PageInfo的分页属性，请问有没有什么好的解决方案？我也在思考中，感谢！

This is my pom.xml:

com.github.pagehelper
pagehelper

        <!--5.0.0 Paging failure，4.1.0 Paging success-->
        <version>4.1.0</version>
        <!--<version>5.0.0</version>-->
  </dependency>

Of cause , pagehelper-spring-boot-starter is ok!Only version 5.0.0 is failure.

该方法未使用分页。打断点看了下类PageInterceptor中intercept方法被调用了2次

第一次的时候 dialect 的值为PageHelper

第二次dialet的值就为空了。所以在finaly里面调用afterAll 时报空指针

使用版本pagehelper-4.1.3

重现:
1.使用分页查询某条数据 假设在Mapper里面 id="selectA" (此处会改变 id="selectA" 的sqlSource 为PageDynamicSqlSource)
2.使用分页查询另外一条数据,但是其resultMap里面包含了selectA
如:

	<resultMap id="ResultMap" type="XXXForm" >
 		<collection property="pros" column="Id=prosID" select="selectA" />
	</resultMap>

在mybatis在查出主表的数据之后，会执行查询属性pros的语句selectA，在 PageSqlSource.getBoundSql方法里面获取SQL的时候就会将selectA也当作是需要分页查询的语句

原因是getCount()获取的是线程变量Page的countSignal属性(count信号，3种情况，null的时候执行默认BoundSql,true的时候执行count，false执行分页)

然后这里实际上是不需要分页查询的，所以再获取 First_PageHelper 的时候会报找不到 First_PageHelper 属性的异常。

请教一下，这个bug在后续的版本有修复吗？

表里面一共 5 条记录, 我按照每页 2 条分页, 查第一页

{
  "endRow": 2,
  "firstPage": 1,
  "hasNextPage": true,
  "hasPreviousPage": false,
  "isFirstPage": true,
  "isLastPage": false,
  "lastPage": 3,
  "list": [
    ...//省略
  ],
  "navigateFirstPage": 1,
  "navigateLastPage": 3,
  "navigatePages": 8,     //?????????为什么是8
  "navigatepageNums": [
    1,
    2,
    3
  ],
  "nextPage": 2,
  "pageNum": 1,
  "pageSize": 2,
  "pages": 3,
  "prePage": 0,
  "size": 2,
  "startRow": 1,
  "total": 5
}

嗨，我遇到了一个问题，跟 #9 一样。
可我只配置了一次，PageInterceptor中intercept方法却被调用了2次，换成4.2的版本就正常了。
我的设置如下：

<property name="plugins">
            <array>
                <!--配置mybatis分页插件-->
                <bean class="com.github.pagehelper.PageInterceptor"/>
            </array>
        </property>

请问还有可能是哪里的问题呢？
@wolazy

配置了两个数据源，只有primary的pagehelper有效，另一个无效，应该如何处理？

返回给前端的字段能否配置下，加入我不想返回orderBy这个字段，但是我又不想重新封装下，能不能通过配置解决

在mapper.xml中已经对相应的枚举类型设置了

typeHandler=org.apache.ibatis.type.EnumOrdinalTypeHandler

page自动查询count的语句正常输出，但是查询list结果的语句就会提示Object does not represent an enum type.的异常。dubug的时候，我的两个枚举两次正常进入，不明白的是为什么又进入了第三次传入了一个Object类型的Class对象，理应来说只有两个参数设置了typeHandler，应该进入两次就完了。

如果注释掉分页，直接查询list结果集也是可以正常查询的，所以我斗胆猜测是否是分页引起的bug，麻烦作者检查一下（PS：我用mybatis的时间不是很长，也许是我使用方法有误，也麻烦请告知，请包涵）

问题会出在哪

有时候需要count，有时候又不用，能否PageRowBounds 增加个属性，好控制

请教一下，当通用Mapper和通用分页组件同时使用时，如何实现模糊查询？

需要在SQL异常的后处理中，进行其他SQL查询操作等， 所以需要在每个startPage时，通过try finally调用clearPage，如果Page本身实现AutoCloseable接口（调用clearPage），则直接使用ty(){}就可以了。

<bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                            helperDialect=mysql
                        </value>
                    </property>
                </bean>

必须上面那样写，但是在你文档里面说。不写也可以。默认自动分析来着。。。。。。。。。。大天坑

在一个循环中，从第一页查询到最后一页，在这个过程中，将查询出来的结果执行update操作，导致分页查询的记录数不准确。如果不执行update操作，就能准确查出所有记录，请问这种情况只能手动写分页了吗？

Caused by: java.lang.NoSuchMethodError: net.sf.jsqlparser.statement.select.Top.setRowCount(J)V
at com.github.pagehelper.parser.SqlServerParser.(SqlServerParser.java:77)
at com.github.pagehelper.dialect.helper.SqlServerDialect.(SqlServerDialect.java:44)
at com.github.pagehelper.dialect.helper.SqlServer2012Dialect.(SqlServer2012Dialect.java:33)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

在同一个工程的测试类里边运行没问题，用maven的tomcat插件运行的时候会报如下错误

    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in file [E:\JAVA\eclipse2017workplace\vcgo-manager\vcgo-manager-service\target\classes\spring\applicationContext-dao.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse config resource: class path resource [mybatis/SqlMapConfig.xml]; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.github.pagehelper.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.github.pagehelper.PageInterceptor
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:753)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.core.NestedIOException: Failed to parse config resource: class path resource [mybatis/SqlMapConfig.xml]; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.github.pagehelper.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.github.pagehelper.PageInterceptor
	at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:434)
	at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:340)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
	... 21 more
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.github.pagehelper.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.github.pagehelper.PageInterceptor
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:109)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:92)
	at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:428)
	... 24 more
Caused by: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.github.pagehelper.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.github.pagehelper.PageInterceptor
	at org.apache.ibatis.builder.BaseBuilder.resolveClass(BaseBuilder.java:103)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.pluginElement(XMLConfigBuilder.java:142)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:100)
	... 26 more
Caused by: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.github.pagehelper.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.github.pagehelper.PageInterceptor
	at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:117)
	at org.apache.ibatis.builder.BaseBuilder.resolveAlias(BaseBuilder.java:130)
	at org.apache.ibatis.builder.BaseBuilder.resolveClass(BaseBuilder.java:101)
	... 28 more
Caused by: java.lang.ClassNotFoundException: Cannot find class: com.github.pagehelper.PageInterceptor
	at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:190)
	at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:89)
	at org.apache.ibatis.io.Resources.classForName(Resources.java:256)
	at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:113)
	... 30 more

求助，找不到原因啊

数据库：SQLSERVER2008
Pagehelper版本：4和5
SQL：select a.id from table1 a with(nolock) left join table2 b with(nolock) on a.id = b.rid where a.name = 'xxx'
执行问题：
执行SQL会解析成：select count(0) from table1 a with(nolock) left join table2 b with(nolock) where a.name = 'xxx'
报错信息：where附近语法错误
补充，解析后的SQL中丢失了on 及后面的关联条件

请问如何解决该bug，谢谢！万分感谢！