一直使用公司的http和ORM框架开发web服务,所以想试试Spring。
使用SpringBoot+MyBatis的代码Demo,详细代码:Demo代码地址

Mysql表

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CREATE TABLE `message_board` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`text` varchar(256) NOT NULL,
`username` varchar(64) DEFAULT NULL,
`create_time` datetime DEFAULT NULL,
`modify_time` datetime DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

application.yml

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spring:
datasource:
url: jdbc:mysql://localhost:3306/mfcheer?uuseUnicode=true&characterEncoding=utf-8&useSSL=true
username: root
password: 123456
driver-class-name: com.mysql.jdbc.Driver

mybatis:
configuration:
map-underscore-to-camel-case: true

logging:
level:
com.hehe.mapper: debug

Maven pom.xml

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<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.mfcheer.learn</groupId>
<artifactId>springboot</artifactId>
<version>0.0.1-SNAPSHOT</version>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>

<dependencies>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.1</version><!--$NO-MVN-MAN-VER$-->
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.1</version><!--$NO-MVN-MAN-VER$-->
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.1</version><!--$NO-MVN-MAN-VER$-->
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.40</version>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

mybatis注解方式

例子

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package dao;

import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import entity.MessageBoard;

public interface MessageBoardDao {

@Select("select * from message_board where id = #{id}")
public MessageBoard queryMessage(@Param("id")int id);

@Update("update message_board set text=#{text}, username=#{username} where id=#{id}")
public void updateMessage(int id, String text, String username);

}

对外接口

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@RestController
@RequestMapping("/message")
public class MessageBoardController {

@Autowired
MessageBoardDao messageBoardDao;

@RequestMapping("/hello")
public String hello() {
return "res Hello!!!";
}

@GetMapping("/hello")
public String gethello() {
return "get Hello!!!";
}

@RequestMapping("/detail")
public String detail(HttpServletRequest request) {
String id = request.getParameter("id");
MessageBoard messageBoard = messageBoardDao.queryMessage(Integer.valueOf(id));
if (messageBoard == null) {
messageBoard = new MessageBoard();
}

String jsonString = JSON.toJSONString(messageBoard);
return jsonString;
}

@RequestMapping("/update")
public String update(HttpServletRequest request) {
String id = request.getParameter("id");
String text = request.getParameter("text");
String username = request.getParameter("username");
messageBoardDao.updateMessage(Integer.valueOf(id), text, username);
return "ok";
}

}

测试url

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url:http://localhost:8080/message/detail?id=1
返回数据:{"id":1,"text":"test2","username":"mengfanqiang"}