spring boot + mybatis 整合
一、java web开发环境搭建
环境依赖
- 操作系统 :Windows 7 64位
- 开发工具 :IntelliJ IDEA 13.1.4
-
开发工具依赖环境
- JDK版本:1.7+
-
开发工具依赖插件
- 包管理:Maven 3.2.3
- Web 服务:Tomcat 8.0.24
环境搭建
针对java上述依赖的工具,进行安装和配置,主要包括jdk的安装、intellij idea的安装、maven的安装配置、tomcat的安装配置,具体如下所示
-
JDK安装 及配置环境变量
-
IntelliJ IDEA 13.1.4安装
-
maven安装及配置
- 下载地址
http://jingyan.baidu.com/article/cb5d61050b8ee7005d2fe04e.html - 配置环境变量
http://jingyan.baidu.com/article/cb5d61050b8ee7005d2fe04e.html - 配置maven到Intellij
- 1.打开 Intellij ,点击菜单栏 Run --> EditConfiguration 弹出 Run/Debug Configurations ,点击左侧栏 + 号按钮,选择添加 Maven ,具体如下图
- 2.添加完后,检查右侧 General 的 Maven home diretory , User setting file , Local repository 所指定的 maven 目录是否为配置的maven环境变量位置,具体如下图

- 下载地址
- 3.如果maven在编译项目的时候提示maven版本有问题,选择 File --> Setting 下的maven选项,看右侧指定的maven目录和项目配置的maven目录是否一致。具体如下图

-
Tomcat安装和配置
- 下载地址
http://archive.apache.org/dist/tomcat/tomcat-8/v8.0.24/bin/apache-tomcat-8.0.24.exe - 配置Tomcat到Intellij
- 1.安装完 Tomcat 后,打开 Intellij ,点击菜单栏 Run --> EditConfiguration 弹出Run/Debug Configurations ,点击左侧栏 + 号按钮,选择添加 Tomcat ,具体如下图
- 2.配置 Tomcat 所在目录,选择右侧的 Server --> Configure ,弹出 Application Servers 框,点击 + 号,指定上一步Tomcat所安装的目录,添加 Tomcat ,具体如下图

- 3.配置部署,选择 Deployment ,并选择 + 号按钮,点击 Artifact ,选择项目名; war exploded
4.配置完后,就会在右上角出现Tomcat的图标,具体如下图
- 下载地址
二、Spring boot搭建
1、Intellij idea菜单栏File->new->project。

2、选择左侧栏中spring initializr,右侧选择jdk版本,以及默认的Service URL,点击next。

3、然后填写项目的Group、Artifact等信息,helloworld阶段选默认就可以了,点击next。

4、左侧点击Web,中间一侧选择Web,然后左侧选择SQL,中间一侧选择JPA、Mybatis、MYSQL(LZ数据库用的是mysql,大家可以选择其他DB),点击next。

5、填写Project name 等信息,然后点击Finish。

至此,一个maven web项目就创建好了,目录结构如下:

这样,Spring boot就搭建好了,pom.xml里已经有了Spring boot的jar包,包括我们的mysql数据连接的jar包。Spring boot内置了类似tomcat这样的中间件,所以,只要运行DemoApplication中的main方法就可以启动项目了。我们测试一下。
在src/main/java下新建目录com/demo/entity/User。
package com.demo.entity;
public class User {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
相同目录下新建com/demo/controller/TestBootController。
package com.demo.controller;
import com.demo.entity.User;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@EnableAutoConfiguration
@RequestMapping("/testboot")
public class TestBootController {
@RequestMapping("getuser")
public User getUser() {
User user = new User();
user.setName("test");
return user;
}
}
spring boot启动DemoAplication是需要扫描它下面的Controller等类的,所以将DemoApplication移动到com/demo目录下。还有就是Spring boot启动默认是要加载数据源的,所以我们在src/main/resources下新建application.yml:
#默认使用配置
spring:
profiles:
active: dev
#公共配置与profiles选择无关
mybatis:
typeAliasesPackage: com.xdd.entity
mapperLocations: classpath:mapper/*.xml
---
#开发配置
spring:
profiles: dev
datasource:
url: jdbc:mysql://localhost:3306/test
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
或者将pom.xml中加载数据源的jar包先注释掉也可以。
/*<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.0</version>
</dependency>*/
最终的目录结构如下,

启动DemoApplication的main方法,访问http://localhost:8080/testboot/getuser即可。

三、整合Mybatis
1、集成druid,使用连接池。pom.xml中添加:
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.0</version>
</dependency>
最终的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>
<!--项目信息-->
<groupId>com.arm</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<!--父级信息-->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.8.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<!--UTF-8字符,java版本-->
<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>
<!--JPA 框架-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!--mybatis 框架-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
<!--web-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--mysql 数据库-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--阿里 连接池-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<!--maven 插件-->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
在application.yml中添加数据源、Mybatis的实体和配置文件位置。
#默认使用配置
spring:
profiles:
active: dev
#公共配置与profiles选择无关 mapperLocations指的路径是src/main/resources
mybatis:
typeAliasesPackage: com.xdd.entity
mapperLocations: classpath:mapper/*.xml
---
#开发配置
spring:
profiles: dev
datasource:
url: jdbc:mysql://localhost:3306/test
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
# 使用druid数据源
type: com.alibaba.druid.pool.DruidDataSource
就这样就整合完成了!我们测试一下。
用MyBatis Generator自动生成代码,参考博文:http://blog.csdn.net/zhshulin/article/details/23912615 这里列一下自动生成的代码。
import com.xdd.entity.User;
import org.springframework.stereotype.Component;
public interface UserDao {
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
}
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.xdd.dao.UserDao" >
<resultMap id="BaseResultMap" type="com.xdd.entity.User" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="user_name" property="userName" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
<result column="age" property="age" jdbcType="INTEGER" />
</resultMap>
<sql id="Base_Column_List" >
id, user_name, password, age
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from user_t
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from user_t
where id = #{id,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="com.xdd.entity.User" >
insert into user_t (id, user_name, password,
age)
values (#{id,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
#{age,jdbcType=INTEGER})
</insert>
<insert id="insertSelective" parameterType="com.xdd.entity.User" >
insert into user_t
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="userName != null" >
user_name,
</if>
<if test="password != null" >
password,
</if>
<if test="age != null" >
age,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="userName != null" >
#{userName,jdbcType=VARCHAR},
</if>
<if test="password != null" >
#{password,jdbcType=VARCHAR},
</if>
<if test="age != null" >
#{age,jdbcType=INTEGER},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.xdd.entity.User" >
update user_t
<set >
<if test="userName != null" >
user_name = #{userName,jdbcType=VARCHAR},
</if>
<if test="password != null" >
password = #{password,jdbcType=VARCHAR},
</if>
<if test="age != null" >
age = #{age,jdbcType=INTEGER},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.xdd.entity.User" >
update user_t
set user_name = #{userName,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>
public class User {
private Integer id;
private String userName;
private String password;
private Integer age;
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 == null ? null : userName.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;
}
}
最后将DemoApplication.java修改一下,让其扫描dao层接口。
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.support.SpringBootServletInitializer;
@SpringBootApplication
@MapperScan("com.xdd.dao")//指定要扫描的Mapper类的包的路径
public class DemoApplication extends SpringBootServletInitializer{
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class,args);
}
}
自己添加controller和service
import java.util.List;
import java.util.Map;
public interface UserService {
public User getUserById(int userId);
boolean addUser(User record);
}
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
import java.util.Map;
@Service("userService")
public class UserServiceImpl implements UserService {
@Resource
private UserDao userDao;
public User getUserById(int userId) {
return userDao.selectByPrimaryKey(userId);
}
public boolean addUser(User record){
boolean result = false;
try {
userDao.insertSelective(record);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
}
@Controller
@RequestMapping("/user")
public class UserController {
@Resource
private UserService userService;
@RequestMapping("/showUser")
@ResponseBody
public User toIndex(HttpServletRequest request, Model model){
int userId = Integer.parseInt(request.getParameter("id"));
User user = this.userService.getUserById(userId);
return user;
}
}
浏览器访问http://localhost:8080/user/showUser?id=1

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