SpringBoot实现分页功能

本文实例为大家分享了SpringBoot实现分页功能的具体代码，供大家参考，具体内容如下

新建demo\src\main\java\com\example\demo\mapper\UserMapper.java

package com.example.demo.mapper;

import com.example.demo.entity.User;
import org.apache.ibatis.annotations.Mapper;

import java.util.List;

Mapper
public interface UserMapper {

    public List findUserByName(String userName);

    public List ListUser();
    public List queryPage(Integer startRows);
    public int getRowCount();
    public int insertUser(User user);
    public int delete(int userId);
    public int Update(User user);
}

新建demo\src\main\resources\mapper\UserMapper.xml

    
        
  
        
        
    

    
  SELECT * FROM user
 

    
  SELECT * FROM user
   where userName like concat(concat('%',#{userName}),'%')
   order by userId desc
 

 
  select * from user
   order by userId desc
   limit #{startRows},5
 

 
  select count(*) from user
 

    
  INSERT INTO user
  (
  userId,userDate,userName,userAddress
  )
  VALUES (
  #{userId},
  #{userDate, jdbcType=VARCHAR},
  #{userName, jdbcType=VARCHAR},
  #{userAddress, jdbcType=VARCHAR}
  )
 

    
  delete from user where userId=#{userId}
 

    
  update user
   set user.userDate=#{userDate},user.userName=#{userName},user.userAddress=#{userAddress}
   where user.userId=#{userId}
 

新建demo\src\main\java\com\example\demo\service\UserService.java

package com.example.demo.service;

import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;


Service
public class UserService {

    @Autowired
    private UserMapper userMapper;

    public List findByName(String userName) {
        return userMapper.findUserByName(userName);
    }

    public List queryPage(Integer startRows) {
        return userMapper.queryPage(startRows);
    }

    public int getRowCount() {
        return userMapper.getRowCount();
    }

    public User insertUser(User user) {
        userMapper.insertUser(user);
        return user;
    }

    public List ListUser(){
        return userMapper.ListUser();
    }

    public int Update(User user){
        return userMapper.Update(user);
    }

    public int delete(int userId){
        return userMapper.delete(userId);
    }

}

新建demo\src\main\java\com\example\demo\controller\UserCtrl.java

package com.example.demo.controller;

import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

RestController
public class UserCtrl {

    @Autowired
    private UserService userService;

    @RequestMapping(value = "/delete", method = RequestMethod.POST)
    public Integer delete(Integer userId) {
        System.out.println(userId);
        int result = userService.delete(userId);
        return result;
    }

    @RequestMapping(value = "/update", method = RequestMethod.POST)
    @ResponseBody
    public String update(User user) {
        int result = userService.Update(user);
        if (result >= 1) {
            return "修改成功";
        } else {
            return "修改失败";
        }

    }

    @RequestMapping(value = "/insert", method = RequestMethod.POST)
    public User insert(User user) {
        return userService.insertUser(user);
    }

    @RequestMapping("/ListUser")
    @ResponseBody
    public List ListUser() {
        return userService.ListUser();
    }

    @RequestMapping("/ListByName")
    @ResponseBody
    public List ListUserByName(String userName) {
        return userService.findByName(userName);
    }

    /**
     * 分页
     * @return
     */
    @RequestMapping(value="/page")
    @ResponseBody
    public List page(Integer page){
        int pageNow = page == null ? 1 : page;
        int pageSize = 5;
        int startRows = pageSize*(pageNow-1);
        List list = userService.queryPage(startRows);
        return list;
    }

    /**
     * rows
     * @return
     */
    @RequestMapping(value="/rows")
    @ResponseBody
    public int rows(){
        return userService.getRowCount();
    }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。