一、java web开发环境搭建

网上有很多教程，参考教程：http://www.cnblogs.com/Leo_wl/p/4752875.html

二、Spring boot搭建

1、Intellij idea菜单栏File->new->project。

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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。

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/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。

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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。

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5、填写Project name 等信息，然后点击Finish。

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至此，一个maven web项目就创建好了，目录结构如下：

image

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。

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package com.demo.entity; public class User { private String name; public String getName() { return name;
 } public void setName(String name) { this.name = name;
 }
 }

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相同目录下新建com/demo/controller/TestBootController。

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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;
 }
 }

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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：

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或者将pom.xml中加载数据源的jar包先注释掉也可以。

/
 org.mybatis.spring.boot
 mybatis-spring-boot-starter
 1.3.0
 /

最终的目录结构如下，

image

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

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三、整合Mybatis

1、集成druid，使用连接池。pom.xml中添加：


 com.alibaba
 druid
 1.1.0

最终的pom.xml文件：

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 4.0.0
com.arm
demo
0.0.1-SNAPSHOT
jar

demo
Demo project for Spring Boot


    org.springframework.boot
    spring-boot-starter-parent
    1.5.8.RELEASE
     



    UTF-8
    UTF-8
    1.8



    
        org.springframework.boot
        spring-boot-starter-data-jpa
    
    
        org.mybatis.spring.boot
        mybatis-spring-boot-starter
        1.3.1
    
    
        org.springframework.boot
        spring-boot-starter-web
    

    
        mysql
        mysql-connector-java
        runtime
    
    
        org.springframework.boot
        spring-boot-starter-test
        test
    

    
        com.alibaba
        druid
        1.1.0
    




    
        
            org.springframework.boot
            spring-boot-maven-plugin

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在application.yml中添加数据源、Mybatis的实体和配置文件位置。

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#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

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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。

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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);

}

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UserMapper.xml

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  id, user_name, password, age 
 
  delete from user_t
 where id = #{id,jdbcType=INTEGER} 
  insert into user_t (id, user_name, password,
 age)
 values (#{id,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
 #{age,jdbcType=INTEGER}) 
  insert into user_t 
  id, 
  user_name, 
  password, 
  age, 
 
 
  #{id,jdbcType=INTEGER}, 
  #{userName,jdbcType=VARCHAR}, 
  #{password,jdbcType=VARCHAR}, 
  #{age,jdbcType=INTEGER}, 
 
 
  update user_t 
  user_name = #{userName,jdbcType=VARCHAR}, 
  password = #{password,jdbcType=VARCHAR}, 
  age = #{age,jdbcType=INTEGER}, 
  where id = #{id,jdbcType=INTEGER} 
  update user_t
 set user_name = #{userName,jdbcType=VARCHAR},
 password = #{password,jdbcType=VARCHAR},
 age = #{age,jdbcType=INTEGER}
 where id = #{id,jdbcType=INTEGER}

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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;
 }
 }

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最后将DemoApplication.java修改一下，让其扫描dao层接口。

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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") public class DemoApplication extends SpringBootServletInitializer{ public static void main(String[] args) {
 SpringApplication.run(DemoApplication.class,args);
 }
 }

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自己添加controller和service

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import java.util.List; import java.util.Map; public interface UserService { public User getUserById(int userId); boolean addUser(User record);
}

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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;
}

}

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@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;
}

}

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浏览器访问http://localhost:8080/user/showUser?id=1

image

spring boot+mybatis整合

公共配置与profiles选择无关 mapperLocations指的路径是src/main/resources

开发配置

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