Mybatis中使用PageHelper詳解

Mybatis中使用PageHelper詳解

引入依賴

<!--PageHelper-->
<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper-spring-boot-starter</artifactId>
    <version>1.2.1</version>
</dependency>

編寫mapper.xml文件

</update>
<!--分頁查詢-->
<select id="selectByPage" resultType="User">
    SELECT * FROM user_info
</select>

User對象

package com.liusl.hrm.model;

import java.io.Serializable;
import java.util.Date;

/**
 * created by l1 on 2017/12/25.
 * 用戶實體類
 */
public class User implements Serializable{
    private Integer id;
    private String loginname;
    private String password;
    private Integer status;
    private Date createDate;
    private String username;

    //無參構造方法
    public User(){
        super();
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getLoginname() {
        return loginname;
    }

    public void setLoginname(String loginname) {
        this.loginname = loginname;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public Date getCreateDate() {
        return createDate;
    }

    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }
}

編寫UserDao類

/**
 * 查詢所有數據，分頁用
 * @return List<User>
 */
public List<User> selectByPage();

測試

@Test
public void selectByPage() throws Exception {
    List<User> list = new ArrayList<User>();
    Page<Object> page = PageHelper.startPage(2, 10);
    userDao.selectByPage();
    List<Object> result = page.getResult();
    System.out.println(JSON.toJSONString(result,true));
}

查詢語句一定要在PageHelper.startPage緊跟方法
兩個參數分別是：要查詢的頁數和每頁的條數

推薦文檔

https://github.com/pagehelper/Mybatis-PageHelper/blob/master/wikis/zh/HowToUse.md
https://www.cnblogs.com/onetwo/p/7371778.html