springboot整合jdbc(2)

测试增删改查功能

1.创建实体类:

package com.mc_74120.springbootjdbc.domain;

public class User {
    private Integer id;
    private  String userName;
    private String sex;

    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;
    }
}
2.创建表    掠过
3.controller层

@Controller
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;
    @RequestMapping("/addUser")
    public String addUser(User user){
        try {
            userService.addUser(user);
        }
        catch ( Exception e){
e.printStackTrace();
return  "error";
        }

return  "redirect:/ok";
    }

    @RequestMapping("/selectUser")
    public String selectUser(Model model){
        List<User> users=userService.selectUser();
        model.addAttribute("userList",users);
        return "selectUser";
    }
   @GetMapping("/preUpdate")
    public String    preUpdate(Integer id,Model model){
       try {
         User user=  userService.findUserById(id);
         model.addAttribute("user",user);
       }
       catch ( Exception e){
           e.printStackTrace();
           return  "error";
       }

       return  "updateUser";
   }
   @PostMapping("/updateUser")
    public String updateUser(User user){
   userService.updateUser(user);
   return "redirect:/ok";
   }
   @GetMapping("/deleteUser")
    public String deleteUser(Integer id){
       try {
           userService.deleteUser(id);
       }
       catch ( Exception e){
           e.printStackTrace();
           return  "error";
       }

       return  "redirect:/ok";
   }
}
4.service层：

package com.mc_74120.springbootjdbc.service;

import com.mc_74120.springbootjdbc.domain.User;

import java.util.List;

public interface UserService {
     void  addUser(User user);
     List<User> selectUser();
     User  findUserById(Integer id);
     void updateUser(User user);
     void deleteUser(Integer id);
}

package com.mc_74120.springbootjdbc.dao.Impl;

import com.mc_74120.springbootjdbc.dao.UserDao;
import com.mc_74120.springbootjdbc.domain.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

@Repository
public class UserDaoImpl implements UserDao {
    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Override
    public void InsertUser(User user) {
        String sql = "insert into user(userName,sex) value(?,?)";
        jdbcTemplate.update(sql, user.getUserName(), user.getSex());
    }

    @Override
    public List<User> selectUser() {
        String sql = "select * from user";
        List<User> users = jdbcTemplate.query(sql, new RowMapper<User>() {
            @Override
            public User mapRow(ResultSet resultSet, int i) throws SQLException {
               String userName=   resultSet.getString("userName");
               String sex=resultSet.getString("sex");
               Integer id=resultSet.getInt("id");
               User user=new User();
               user.setId(id);
               user.setSex(sex);
            user.setUserName(userName);
    return  user;
            }
        });
        return users;
    }

    @Override
    public User findUserById(Integer id) {
        String sql="select * from user where id=?";
        User user=new User();
        Object[] objs=new Object[]{id};
        jdbcTemplate.query(sql,objs, new RowCallbackHandler() {
            @Override
            public void processRow(ResultSet resultSet) throws SQLException {
                 user.setId(resultSet.getInt("id"));
                 user.setUserName(resultSet.getString("userName"));
                 user.setSex(resultSet.getString("sex"));
            }
        });
        return user;
    }

    @Override
    public void updateUser(User user) {
        String sql="update user set sex=?,userName=? where id=?";
        jdbcTemplate.update(sql,user.getSex(),user.getUserName(),user.getId());
    }

    @Override
    public void deleteUser(Integer id) {
        String sql="delete  from user where Id=?";
        jdbcTemplate.update(sql,id);
    }
}
5.dao层

package com.mc_74120.springbootjdbc.dao;

import com.mc_74120.springbootjdbc.domain.User;
import org.springframework.stereotype.Repository;

import java.util.List;

public interface UserDao {
    void InsertUser(User user);
    List<User> selectUser();
    User findUserById(Integer id);
    void updateUser(User user);
    void deleteUser(Integer id);
}

package com.mc_74120.springbootjdbc.dao.Impl;

import com.mc_74120.springbootjdbc.dao.UserDao;
import com.mc_74120.springbootjdbc.domain.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

@Repository
public class UserDaoImpl implements UserDao {
    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Override
    public void InsertUser(User user) {
        String sql = "insert into user(userName,sex) value(?,?)";
        jdbcTemplate.update(sql, user.getUserName(), user.getSex());
    }

    @Override
    public List<User> selectUser() {
        String sql = "select * from user";
        List<User> users = jdbcTemplate.query(sql, new RowMapper<User>() {
            @Override
            public User mapRow(ResultSet resultSet, int i) throws SQLException {
               String userName=   resultSet.getString("userName");
               String sex=resultSet.getString("sex");
               Integer id=resultSet.getInt("id");
               User user=new User();
               user.setId(id);
               user.setSex(sex);
            user.setUserName(userName);
    return  user;
            }
        });
        return users;
    }

    @Override
    public User findUserById(Integer id) {
        String sql="select * from user where id=?";
        User user=new User();
        Object[] objs=new Object[]{id};
        jdbcTemplate.query(sql,objs, new RowCallbackHandler() {
            @Override
            public void processRow(ResultSet resultSet) throws SQLException {
                 user.setId(resultSet.getInt("id"));
                 user.setUserName(resultSet.getString("userName"));
                 user.setSex(resultSet.getString("sex"));
            }
        });
        return user;
    }

    @Override
    public void updateUser(User user) {
        String sql="update user set sex=?,userName=? where id=?";
        jdbcTemplate.update(sql,user.getSex(),user.getUserName(),user.getId());
    }

    @Override
    public void deleteUser(Integer id) {
        String sql="delete  from user where Id=?";
        jdbcTemplate.update(sql,id);
    }
}