SSM 前后端分离 这里controll层的返回值和之前那个不一样

1.先创建实体类：

2.创建mapper层

package cn.kgc.mapper;
 
import cn.kgc.Account;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
 
import java.util.List;
 
/**
 * Created by 86182 on 2019/7/1.
 */
public interface AccountMapper {
    //查询所有
    @Select("select * from account")
    List<Account> selectAccount();
    //查询单条
    @Select("select * from account where id=#{id}")
    Account selectByid(Integer id);
    //添加
    @Insert("insert into account(id,number,pwd,money,status,createtime) values(#{id},#{number},#{pwd},#{money},#{status},now())")
    Integer insertAccount(Account account);
    //修改
    @Update("update account set number =#{number},pwd=#{pwd},money=#{money},status=#{status} WHERE id =#{id}")
    Integer updateAccount(Account account);
    //删除
    @Delete("delete from account where id=#{id}")
    Integer deleteAccount(Integer id);
}
3.创建service层
3.1接口层：

package cn.kgc.service;
 
import cn.kgc.Account;
 
import java.util.List;
 
/**
 * Created by 86182 on 2019/7/1.
 */
public interface AccountService {
    //页面展示
    List<Account> showData();
    //查询单条
    Account findByData(Integer id);
    //添加
    Integer add(Account account);
    //修改
    Integer edit(Account account);
    //删除
    Integer del(Integer id);
}
3.2实现类

package cn.kgc.service;
 
import cn.kgc.mapper.AccountMapper;
import cn.kgc.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
 
import java.util.List;
 
/**
 * Created by 86182 on 2019/7/1.
 */
@Service
@Transactional
public class AccountServiceImpl implements AccountService {
    @Autowired
    private AccountMapper accountMapper;
    @Override
    public List<Account> showData() {
        return accountMapper.selectAccount();
    }
 
    @Override
    public Account findByData(Integer id) {
        return accountMapper.selectByid(id);
    }
 
    @Override
    public Integer add(Account account) {
        return accountMapper.insertAccount(account);
    }
 
    @Override
    public Integer edit(Account account) {
        return accountMapper.updateAccount(account);
    }
 
    @Override
    public Integer del(Integer id) {
        return accountMapper.deleteAccount(id);
    }
}
4.controller层

package cn.kgc.controller;
 
import cn.kgc.service.AccountService;
import cn.kgc.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
import java.util.List;
 
/**
 * Created by 86182 on 2019/7/1.
 */
@RestController
public class AccountController {
    @Autowired
    private AccountService accountService;
 
    //查询全部
    @RequestMapping("/init.do")
    public List<Account> showData(){
        return accountService.showData();
    }
    //添加
    @RequestMapping("/add.do")
    public int addData(Account account){
        return accountService.add(account);
    }
    //查询单条
    @RequestMapping("/info.do")
    public Account getInfo(Integer id){
        return accountService.findByData(id);
    }
    //修改
    @RequestMapping("/edit.do")
    public  int editData(Account account){
        return accountService.edit(account);
    }
    //删除
    @RequestMapping("/del.do")
    public int deleteData(Integer id){
        return accountService.del(id);
    }
}
前台页面html

js页面

$(function () {
    initData();
})
function initData() {
    $.ajax({
      url:"init.do",
        type:"post",     //post的方式提交
        dataType:"json",   //数据类型是json格式
        data:{},
        async:true,
        success:function (obj) {
            // alert("success");
            console.log(obj);
            var str="";
            $.each(obj,function(i) {
                str+="<tr>";
                str+="    <td>"+obj[i].id+"</td>";
                str+="    <td>"+obj[i].number+"</td>";
                str+="    <td>"+obj[i].money+"</td>";
                str+="    <td>"+obj[i].status+"</td>";
                str+="    <td>"+obj[i].createtime+"</td>";
                str+="    <td>" +
                          "<a href='edit.html?id="+obj[i].id+"'>修改</a>" +
                          "|<a href='javascript:void(0);' onclick='delFun("+obj[i].id+")'>删除</a>" +
                          "</td>";
                str+="</tr>";
            });
            $("table").append(str);
        },
        error:function () {
            alert("error")
        }
    });
}
function delFun(id) {
    $.ajax({
        url:"del.do",
        type:"post",
        dataType:"json",
        data:{"id":id},
        async:true,
        success:function (obj) {
            location.href="main.html";
        },
        error:function () {
            alert("del error")
        }
    });
}