SSM框架中分页插件PageInterceptor

package com.ita.config;

import com.github.pagehelper.PageInterceptor;
import org.apache.ibatis.plugin.Interceptor;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;

import javax.sql.DataSource;
import java.util.Properties;

public class MyBatisConfig {
    /**配置PageInterceptor分页插件*/
    @Bean
    public PageInterceptor getPageInterceptor() {
        PageInterceptor pageIntercptor = new PageInterceptor();
        Properties properties = new Properties();
        properties.setProperty("value", "true");
        pageIntercptor.setProperties(properties);
        return pageIntercptor;
    }
    /*
    定义MyBatis的核心连接工厂bean，
    等同于<bean class="org.mybatis.spring.SqlSessionFactoryBean">
     参数使用自动装配的形式加载dataSource，
    为set注入提供数据源，dataSource来源于JdbcConfig中的配置
     */
    @Bean
    public SqlSessionFactoryBean getSqlSessionFactoryBean(@Autowired DataSource dataSource,@Autowired PageInterceptor pageIntercptor){
        SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();
        //等同于<property name="dataSource" ref="dataSource"/>
        ssfb.setDataSource(dataSource);
        Interceptor[] plugins={pageIntercptor};
        ssfb.setPlugins(plugins);
        return ssfb;
    }
  
}

 1.在 pom.xml 中添加如下：

<properties>
  <pagehelper-version>5.0.0</pagehelper-version>
  <jsqlparser-version>0.9.5</jsqlparser-version>
</properties>

<!--pagehelper-->
<dependency>
  <groupId>com.github.pagehelper</groupId>
  <artifactId>pagehelper</artifactId>
  <version>${pagehelper-version}</version>
</dependency>

<!-- pagehelper的依赖包:jsqlparser -->
<dependency>
  <groupId>com.github.jsqlparser</groupId>
  <artifactId>jsqlparser</artifactId>
  <version>${jsqlparser-version}</version>
</dependency>

2.在 spring-mybatis.xml 中添加如下

<!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!-- 自动扫描mapping.xml文件 -->
    <property name="mapperLocations" value="classpath*:mapping/**/*.xml"></property>
    <!--pageHelper-->
    <property name="plugins">
        <array>
            <bean class="com.github.pagehelper.PageInterceptor">
                <property name="properties">
                    <!--使用下面的方式配置参数，一行配置一个 -->
                    <value>
                        helperDialect=postgresql
                        reasonable=true
                        supportMethodsArguments=true
                        params=count=countSql
                        autoRuntimeDialect=true
                    </value>
                </property>
            </bean>
        </array>
    </property>
</bean>

在 userDao 中

ArrayList<Users> getUserList();

在 mapping.xml 中

<select id="getUserList"  resultType="com.hanpeng.entity.Users">
   select * from tb_users
</select>

在 userService 中

public void test(){
   PageHelper.startPage(1, 5);
   ArrayList<Users> list = userDao.getUserList();
   PageInfo<Users> page = new PageInfo<Users>(list);
   System.out.println("总数量：" + page.getTotal());
   System.out.println("当前页查询记录：" + page.getList().size());
   System.out.println("当前页码：" + page.getPageNum());
   System.out.println("每页显示数量：" + page.getPageSize());
   System.out.println("总页：" + page.getPages());
}

在 controller 中

@RequestMapping("pageHelperTest")
public void getList(){
   userService.test();
}