记录-springcloud -mybatis(代码)
代码部分：
SRE实战 互联网时代守护先锋，助力企业售后服务体系运筹帷幄！一键直达领取阿里云限量特价优惠。1:pom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> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.0.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot-mybatis</name> <packaging>war</packaging> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <!--spring-boot 整合 mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.0.1</version> </dependency> <!--mysql驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
2：entity 包 里 的 是 实体类：随便写几个属性
package com.entity; import java.io.Serializable; public class User implements Serializable { private String name; private String age; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } @Override public String toString() { return "User{" + "name='" + name + '\'' + ", age='" + age + '\'' + '}'; } }
3：mapper文件：
package com.mapper; import com.entity.User; import java.util.List; import org.springframework.stereotype.Repository; @Repository public interface UserDao { public List<User> findAll(); public List<User> findOrd(String age); }
4：service
package com.service; import com.entity.User; import com.mapper.UserDao; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class UserService { /** * 根据接口查询所用的用户 */ @Autowired UserDao userDao; public List<User> findAllUser(){ List<User> all = userDao.findAll(); return all; }; /*查寻所有的age大于12 的人的信息*/ public List<User> findOrd(String age){ List<User> userDaoOrd = userDao.findOrd(age); return userDaoOrd; } }
5:controller
package com.controller; import com.entity.User; import com.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.List; @RestController @RequestMapping("/user") public class Test_controller { @Autowired private UserService userService; @RequestMapping("/getuser") public List<User> getUser() { List<User> list = userService.findAllUser(); System.out.println(list); return list; } @RequestMapping("/order") public List<User> getOrder(){ String age = "12"; List<User> list = userService.findOrd(age); return list; } }
6:启动类（启动类的位置要在所有的包的上一级，且不能直接放在Java包的下面，需要建一个包放）
package com.controller; import com.entity.User; import com.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.List; @RestController @RequestMapping("/user") public class Test_controller { @Autowired private UserService userService; @RequestMapping("/getuser") public List<User> getUser() { List<User> list = userService.findAllUser(); System.out.println(list); return list; } @RequestMapping("/order") public List<User> getOrder(){ String age = "12"; List<User> list = userService.findOrd(age); return list; } }
7：resouse文件夹下的mapper文件的内容
<?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.mapper.UserDao">
<resultMap id="BaseResultMap" type="com.entity.User">
<result column="name" jdbcType="VARCHAR" property="name" />
<result column="age" jdbcType="VARCHAR" property="age" />
</resultMap>
<select id="findAll" resultType="com.entity.User">
select * from user
</select>
<!--查询年龄大于 12 的所有user的信息 parameterType:传递参数的类型 resultType:返回值类型 -->
<select id="findOrd" parameterType="String" resultType="com.entity.User">
select * from user where age > #{age}
</select>
</mapper>
8：application.yml
#默认使用配置
spring:
profiles:
active: dev
9:application-dev.yml (库是：test 表是:user)
server: port: 8080 spring: datasource: username: root password: root url: jdbc:mysql://localhost:3306/test?userUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC driver-class-name: com.mysql.jdbc.Driver mybatis: mapper-locations: classpath:mapper/*Mapper.xml type-aliases-package: com.entity #showSql logging: level: com: example: mapper : debug
更多精彩
