Springboot 使用Mybatis对postgreSQL实现CRUD

 

目录结构web

 

一、建立一个springboot项目

选择Web、Mabatis、postgreSQLspring

 

 

二、application中写入配置文件

1 #配置数据源 2 spring.datasource.platform=postgres 3 spring.datasource.url=jdbc:postgresql://127.0.0.1:5432/postgres 4 spring.datasource.username=postgres 5 spring.datasource.password=123456 6 spring.datasource.driverClassName=org.postgresql.Driver

  写入完成后,org.postgresql.Driver会报错(能够无论)。缘由是postgresql这个jar包依赖类型默认是runtime(运行时生效),因此并不影响代码的运行。sql

  修改方法:数据库

  右键点击项目——选择“open module settings”——点击“Dependencies”,找到Maven:org.postgresql:postgresql:42.2.5将runtime修改成Compileapache

 

 

三、建立一个实例化的实体类

首先在postgreSQL数据库中新建一个表table_one,并建立一个BeanUser的实体类。springboot

 1 package com.example.bean;  2 
 3 public class BeanUser {  4 
 5     private Integer id;  6     private String user_name;  7     private String pass_word;  8 
 9     public Integer getId() { 10 
11         return id; 12 
13  } 14 
15     public void setId(Integer id) { 16 
17         this.id = id; 18 
19  } 20 
21     public String getUser_name() { 22 
23         return user_name; 24 
25  } 26 
27     public void setUser_name(String user_name) { 28 
29         this.user_name = user_name; 30 
31  } 32 
33     public String getPass_word() { 34 
35         return pass_word; 36 
37  } 38 
39     public void setPass_word(String pass_word) { 40 
41         this.pass_word = pass_word; 42 
43  } 44 } 45 
46

四、建立一个对表CRUD的实体类

 1 package com.example.mapper;  2 
 3 import com.example.bean.BeanUser;  4 
 5 import org.apache.ibatis.annotations.*;  6 
 7  
 8 
 9 //指定这是一个操做数据库的mapper
10 
11 @Mapper 12 
13 public interface BeanUserMapper { 14 
15  
16 
17     //查询
18 
19     @Select("select * from table_one where id=#{id}") 20 
21     public BeanUser selectId(Integer id); 22 
23  
24 
25     //删除
26 
27     @Delete("delete from table_one where id=#{id}") 28 
29     public int deleteId(Integer id); 30 
31  
32 
33     //插入
34 
35     @Insert("insert into table_one(id,user_name,pass_word) values(#{id},#{user_name},#{pass_word})") 36 
37     public int insertBean(BeanUser beanUser); 38 
39  
40 
41     //修改
42 
43     @Update("update table_one set user_name=#{user_name},pass_word=#{pass_word} where id=#{id}") 44 
45     public int UpdateBean(BeanUser beanUser); 46 
47 }

五、建立一个controller控制器

接收和处理客户端的请求app

 1 package com.example.controller;  2 
 3 import com.example.bean.BeanUser;  4 
 5 import com.example.mapper.BeanUserMapper;  6 
 7 import org.springframework.beans.factory.annotation.Autowired;  8 
 9 import org.springframework.web.bind.annotation.PathVariable; 10 
11 import org.springframework.web.bind.annotation.RequestMapping; 12 
13 import org.springframework.web.bind.annotation.RestController; 14 
15  
16 @RestController 17 
18 public class ControllerBean { 19 
20  @Autowired 21 
22  BeanUserMapper beanUserMapper; 23 
24     //查询
25 
26     @RequestMapping("/get/{id}") 27 
28     public BeanUser getBeanUser(@PathVariable("id") Integer id){ 29 
30         return beanUserMapper.selectId(id); 31 
32  } 33     //插入
34 
35     @RequestMapping("/insert") 36 
37     public BeanUser insertBeanUser(BeanUser beanUser){ 38 
39  beanUserMapper.insertBean(beanUser); 40 
41         return beanUser; 42 
43  } 44     //修改
45 
46     @RequestMapping("/update") 47 
48     public BeanUser updateBeanUser(BeanUser beanUser){ 49 
50  beanUserMapper.UpdateBean(beanUser); 51 
52         return beanUser; 53 
54  } 55     //删除
56 
57     @RequestMapping("/delete/{id}") 58 
59     public String deleteBeanUser(@PathVariable("id")Integer id){ 60 
61  beanUserMapper.deleteId(id); 62 
63          return "删除成功!"; 64 
65  } 66 }

 

六、运行成功

查询post

 

插入this

 

修改url

 

删除

 

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