ssm框架+PageHelper插件如何实现分页查询功能

这篇文章主要介绍了SSM框架+PageHelper插件如何实现分页查询功能，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。

通过搭建ssm框架，然后通过mybatis的分页插件pagehelp进行分页查询。

看一下项目结构：

首先创建一个Maven工程，pom中引入相关jar包

<dependencies>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aop</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aspects</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-beans</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-expression</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-test</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-tx</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-WEB</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>4.3.2.RELEASE</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis-spring</artifactId>            <version>1.3.0</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.4.4</version>        </dependency>        <dependency>            <groupId>commons-io</groupId>            <artifactId>commons-io</artifactId>            <version>2.4</version>        </dependency>        <dependency>            <groupId>org.apache.commons</groupId>            <artifactId>commons-lang3</artifactId>            <version>3.4</version>        </dependency>        <dependency>            <groupId>commons-logging</groupId>            <artifactId>commons-logging</artifactId>            <version>1.1.1</version>        </dependency>        <dependency>            <groupId>org.apache.logging.log4j</groupId>            <artifactId>log4j-core</artifactId>            <version>2.9.1</version>        </dependency>        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-log4j12</artifactId>            <version>1.7.21</version>            <scope>test</scope>        </dependency>        <dependency>            <groupId>aopalliance</groupId>            <artifactId>aopalliance</artifactId>            <version>1.0</version>        </dependency>        <dependency>            <groupId>mysql</groupId>            <artifactId>Mysql-connector-java</artifactId>            <version>5.1.38</version>        </dependency>        <dependency>            <groupId>com.mchange</groupId>            <artifactId>c3p0</artifactId>            <version>0.9.5.2</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>            <scope>provided</scope>        </dependency>                <dependency>            <groupId>javax.servlet.jsp</groupId>            <artifactId>javax.servlet.jsp-api</artifactId>            <version>2.2.1</version>            <scope>provided</scope>        </dependency>        <dependency>            <groupId>taglibs</groupId>            <artifactId>standard</artifactId>            <version>1.1.2</version>        </dependency>        <dependency>            <groupId>com.GitHub.pagehelper</groupId>            <artifactId>pagehelper</artifactId>            <version>5.1.2</version>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-compiler-plugin</artifactId>                <version>3.6.1</version>                <configuration>                    <encoding>utf-8</encoding>                </configuration>            </plugin>            <plugin>                <groupId>org.apache.Tomcat.maven</groupId>                <artifactId>tomcat7-maven-plugin</artifactId>                <version>2.2</version>                <configuration>                    <uriEncoding>UTF-8</uriEncoding>                </configuration>            </plugin>        </plugins>    </build></project>

pom.xml中引入page分页的jar包

   <dependency>            <groupId>com.github.pagehelper</groupId>            <artifactId>pagehelper</artifactId>            <version>5.1.2</version>        </dependency>

jar包这里就引入完了。下面引入配置文件

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="Http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"  xsi:schemaLocation="http://www.springframework.org/schema/beans                      http://www.springframework.org/schema/beans/spring-beans.xsd                      http://www.springframework.org/schema/tx                      http://www.springframework.org/schema/tx/spring-tx.xsd                      http://www.springframework.org/schema/aop                      http://www.springframework.org/schema/aop/spring-aop.xsd                     http://www.springframework.org/schema/context                      http://www.springframework.org/schema/context/spring-context.xsd">        <!-- 扫描注解的包 -->    <context:component-scan base-package="com.jiangfx.service"/>    <!-- 配置数据库 -->    <!-- 加载配置文件 -->    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/pagehelper"></property>        <property name="user" value="root"></property>        <property name="passWord" value="1234"></property>    </bean>                     <!-- 配置sqlSessionFactory, 并将数据源注入 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <!-- 引入数据源 -->        <property name="dataSource" ref="dataSource"></property>        <!--载入mybatis配置文件-->        <property name="configLocation" value="classpath:mybatis-config.xml"/>        <!--载入配置mapper映射的xml-->         <property name="mapperLocations" value="classpath:com/jiangfx/mapper    @RequestMapping(value="/list",method=RequestMethod.GET)    public String pageList(ModelMap map,@RequestParam(defaultValue="1",required=true,value="pageNo") Integer pageNo){        Integer pageSize=4;//每页显示记录数        //分页查询        PageHelper.startPage(pageNo, pageSize);        List<User> userList = pageService.list();//获取所有用户信息        PageInfo<User> pageInfo=new PageInfo<User>(userList);        map.addAttribute("pageInfo", pageInfo);        return "list";    }}

serviceImpl:接口自己定义，这里就不贴了

package com.jiangfx.service.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.jiangfx.entity.User;import com.jiangfx.mapper.UserMapper;import com.jiangfx.service.UserService;@Servicepublic class UserServiceImpl implements UserService {    @Autowired    private UserMapper userMapper;            @Override    public List<User> list() {        return userMapper.getAllUser();    }}

entity:

package com.jiangfx.entity;public class User {    private Integer id;    private String username;    private String sex;    private String city;    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;    }    public String getCity() {        return city;    }    public void setCity(String city) {        this.city = city;    }    @Override    public String toString() {        return "User [id=" + id + ", username=" + username + ", sex=" + sex + ", city=" + city + "]";    }    }

mapper

package com.jiangfx.mapper;import java.util.List;import com.jiangfx.entity.User;public interface UserMapper {    //查询所有用户    List<User> getAllUser();}

mapper.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"        "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.jiangfx.mapper.UserMapper">    <!-- 查询博客 -->    <select id="getAllUser" resultType="com.jiangfx.entity.User">        select * from user    </select></mapper>

下面是jsp

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><a href="list" rel="external nofollow" >分页查询</a></body></html>

返回list

list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>  <center>        <table width="200" border="1">          <tr>            <th scope="col">ID</th>            <th scope="col">姓名</th>            <th scope="col">性别</th>            <th scope="col">城市</th>          </tr>          <c:forEach items="${pageInfo.list}" var="user">          <tr>            <td>${user.id}</td>            <td>${user.username}</td>            <td>${user.sex}</td>            <td>${user.city}</td>          </tr>          </c:forEach>        </table>        <p>当前 ${pageInfo.pageNum }页,总${pageInfo.pages }                页,总 ${pageInfo.total } 条记录</div></p>        <a href="list?pageNo=${pageInfo.firstPage}" rel="external nofollow" >第一页</a>        <c:if test="${pageInfo.hasPreviousPage }">            <a href="list?pageNo=${pageInfo.pageNum-1}" rel="external nofollow" >上一页</a>        </c:if>              <c:if test="${pageInfo.hasNextPage }">            <a href="list?pageNo=${pageInfo.pageNum+1}" rel="external nofollow" >下一页</a>        </c:if>                <a href="list?pageNo=${pageInfo.lastPage}" rel="external nofollow" >最后页</a>    </center>  </body></html>

访问localhost:8080/pagehelper

点击分页查询结果：

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