IDEA版本:2017.1.5
运行方式:部署到tomcat中运行
数据库使用的mysql
程序中使用了mybatis,sql语句是写在xml中的
改项目是个maven项目
1.项目结构
2.pom.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.user</groupId>
<artifactId>user-crud</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>user-crud</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.8.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- mybatis -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.1.1</version>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<!-- tomcat -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>- 1
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3.application.properties文件
mybatis.config-locations=classpath:mybatis/mybatis-config.xml
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml
mybatis.type-aliases-package=com.user.pojo
spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://数据库ip:3306/数据库名?useUnicode=true&characterEncoding=utf-8
spring.datasource.username = 用户名
spring.datasource.password = 密码- 1
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4.mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<typeAlias alias="Integer" type="java.lang.Integer" />
<typeAlias alias="Long" type="java.lang.Long" />
<typeAlias alias="HashMap" type="java.util.HashMap" />
<typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap" />
<typeAlias alias="ArrayList" type="java.util.ArrayList" />
<typeAlias alias="LinkedList" type="java.util.LinkedList" />
</typeAliases>
</configuration>- 1
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5.UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.user.dao.UserDao" >
<resultMap id="BaseResultMap" type="com.user.pojo.UserPO" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
<result column="age" property="age" jdbcType="INTEGER" />
<result column="phone" property="phone" jdbcType="VARCHAR" />
</resultMap>
<sql id="Base_Column_List" >
id, name, password, age, phone
</sql>
<!-- 得到所有的用户信息 -->
<select id="getAll" resultMap="BaseResultMap" >
select
<include refid="Base_Column_List" />
from user
</select>
<!-- 根据id查找某个用户信息 -->
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from user
where id = #{id,jdbcType=INTEGER}
</select>
<!-- 根据id删除某个用户信息 -->
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from user
where id = #{id,jdbcType=INTEGER}
</delete>
<!-- 插入一条用户信息 -->
<insert id="insertSelective" parameterType="com.user.pojo.UserPO" >
insert into user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="name != null" >
name,
</if>
<if test="password != null" >
password,
</if>
<if test="age != null" >
age,
</if>
<if test="phone != null" >
phone,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="name != null" >
#{name,jdbcType=VARCHAR},
</if>
<if test="password != null" >
#{password,jdbcType=VARCHAR},
</if>
<if test="age != null" >
#{age,jdbcType=INTEGER},
</if>
<if test="phone != null" >
#{phone,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<!-- 根据id更新一条用户信息 -->
<update id="updateByPrimaryKeySelective" parameterType="com.user.pojo.UserPO" >
update user
<set >
<if test="name != null" >
name = #{name,jdbcType=VARCHAR},
</if>
<if test="password != null" >
password = #{password,jdbcType=VARCHAR},
</if>
<if test="age != null" >
age = #{age,jdbcType=INTEGER},
</if>
<if test="phone != null" >
phone = #{phone,jdbcType=VARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>- 1
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6.UserPO.java
package com.user.pojo;
public class UserPO {
private Integer id;
private String name; // 用户名
private String password; // 密码
private Integer age; // 年龄
private String phone; // 电话号码
public UserPO() {
super();
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name == null ? null : name.trim();
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password == null ? null : password.trim();
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone == null ? null : phone.trim();
}
@Override
public String toString() {
return "UserPO{" +
"id=" + id +
", name='" + name + '\'' +
", password='" + password + '\'' +
", age=" + age +
", phone='" + phone + '\'' +
'}';
}
}- 1
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7.UserDao.java
package com.user.dao;
import com.user.pojo.UserPO;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface UserDao {
/**
* 得到所有的用户信息
* @return List<UserPO>
*/
List<UserPO> getAll();
/**
* 根据id删除某个用户信息
* @param id
* @return
*/
int deleteByPrimaryKey(Integer id);
/**
* 插入一条用户信息
* @param record
* @return
*/
int insertSelective(UserPO record);
/**
* 根据id查找某个用户信息
* @param id
* @return UserPO
*/
UserPO selectByPrimaryKey(Integer id);
/**
* 根据id更新一条用户信息
* @param record
* @return
*/
int updateByPrimaryKeySelective(UserPO record);
}- 1
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8.UserService.java
package com.user.service;
import com.user.dao.UserDao;
import com.user.pojo.UserPO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @Author: yf
* @Date: 2017/11/27.
*/
@Service
public class UserService {
@Autowired
private UserDao userDao;
public List<UserPO> getUsers() {
List<UserPO> users = userDao.getAll();
return users;
}
public int addUser(UserPO user) {
return userDao.insertSelective(user);
}
public int deleteUser(Integer id) {
return userDao.deleteByPrimaryKey(id);
}
public int updateUser(UserPO user) {
return userDao.updateByPrimaryKeySelective(user);
}
public UserPO getUser(Integer id) {
return userDao.selectByPrimaryKey(id);
}
}- 1
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9.UserController.java
package com.user.controller;
import com.user.pojo.UserPO;
import com.user.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
/**
* @Author: yf
* @Date: 2017/11/27.
*/
@RestController
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/getUsers")
public List<UserPO> getUsers() {
return userService.getUsers();
}
@PostMapping("/add")
public int add(@ModelAttribute UserPO user) {
return userService.addUser(user);
}
@GetMapping("/delete/{id}")
public int delete(@PathVariable("id") Integer id) {
return userService.deleteUser(id);
}
@PostMapping("/update")
public int update(@ModelAttribute UserPO user) {
return userService.updateUser(user);
}
@GetMapping("/get/{id}")
public UserPO getOne(@PathVariable("id") Integer id) {
return userService.getUser(id);
}
}- 1
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10.ServletInitializer.java
package com.user;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
/**
* @Author: yf
* @Date: 2017/11/27.
*/
public class ServletInitializer extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(UserCrudApplication.class);
}
}- 1
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11.UserCrudApplication.java
package com.user;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.user.dao")
public class UserCrudApplication {
public static void main(String[] args) {
SpringApplication.run(UserCrudApplication.class, args);
}
}- 1
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12.数据库
建表语句:
CREATE TABLE `user` (
`id` int(8) NOT NULL AUTO_INCREMENT COMMENT '主键',
`name` varchar(32) NOT NULL COMMENT '用户名',
`password` varchar(255) NOT NULL COMMENT '密码',
`age` int(8) NOT NULL COMMENT '年龄',
`phone` varchar(32) NOT NULL COMMENT '电话号码',
PRIMARY KEY (`id`),
UNIQUE KEY `user_name_uindex` (`name`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8mb4- 1
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MyBatis CRUD示例

本文介绍了一个基于MyBatis的简单CRUD操作示例,包括项目的Maven配置、实体类定义、Mapper接口及XML映射文件等内容。
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