<强>一、新建春引导工程
新建工程的时候,需要加入JPA、H2依赖
<强>二、工程结构
pom文件依赖如下:
& lt; & # 63; xml version=" 1.0 " encoding=" utf - 8 " & # 63;比;
& lt;项目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”比;
& lt; modelVersion> 4.0.0
& lt; groupId> com.chhliu.springboot.h3
& lt; artifactId> springboot-h3
& lt; version> 0.0.1-SNAPSHOT
& lt; packaging> jar
& lt; name> springboot-h3
春天& lt; description>演示项目引导H2
& lt; parent>
& lt; groupId> org.springframework.boot
& lt; artifactId> spring-boot-starter-parent
& lt; version> 1.4.3.RELEASE
& lt; relativePath/比;& lt; !——从库中查找父——比;
& lt;/parent>
& lt; properties>
& lt; project.build.sourceEncoding> UTF-8
& lt; project.reporting.outputEncoding> UTF-8
& lt; java.version> 1.7 & lt;/java.version>
& lt;/properties>
& lt; dependencies>
& lt; dependency>
& lt; groupId> org.springframework.boot
& lt; artifactId> spring-boot-starter-data-jpa
& lt;/dependency>
& lt; dependency>
& lt; groupId> org.springframework.boot
& lt; artifactId> spring-boot-starter-web
& lt;/dependency>
& lt; dependency>
& lt; groupId> com.h3database
& lt; artifactId> h3
& lt; scope> runtime
& lt;/dependency>
& lt; dependency>
& lt; groupId> org.springframework.boot
& lt; artifactId> spring-boot-starter-test
& lt; scope> test
& lt;/dependency>
& lt;/dependencies>
& lt; build>
& lt; plugins>
& lt; plugin>
& lt; groupId> org.springframework.boot
& lt; artifactId> spring-boot-maven-plugin
& lt;/plugin>
& lt;/plugins>
& lt;/build>
& lt;/project>
之前
<强>三、编写实体类
包com.chhliu.springboot.h3.entity;
进口java.math.BigDecimal;
进口javax.persistence.Column;
进口javax.persistence.Entity;
进口javax.persistence.GeneratedValue;
进口javax.persistence.GenerationType;
进口javax.persistence.Id;
@ entity
公开课用户{
@ id
@GeneratedValue(策略=GenerationType.AUTO)
私人长id;
@ column
私人字符串的用户名;
@ column
私人字符串名称;
@ column
私人短年龄;
@ column
私人BigDecimal平衡;
……省略gettter和setter方法
}
之前
<强>四、编写刀
包com.chhliu.springboot.h3.repository;
进口org.springframework.data.jpa.repository.JpaRepository;
进口org.springframework.stereotype.Repository;
进口com.chhliu.springboot.h3.entity.User;
@
公共接口UserRepository延伸JpaRepository<用户,Long>{
}
<强>五、编写控制器
包com.chhliu.springboot.h3.controller;
进口org.springframework.beans.factory.annotation.Autowired;
进口org.springframework.web.bind.annotation.GetMapping;
进口org.springframework.web.bind.annotation.PathVariable;
进口org.springframework.web.bind.annotation.RestController;
进口com.chhliu.springboot.h3.entity.User;
进口com.chhliu.springboot.h3.repository.UserRepository;
@RestController
公开课用户控件{
@ autowired
私人UserRepository UserRepository;
@GetMapping ("/user/{id} ")//注意,此处使用的是GetMapping注解,该注解的作用类似与@RequestMapping (value=" https://www.yisu.com/user/{id}”、方法=RequestMethod.GET), @PostMapping注解同理
公共用户findById (@PathVariable长id) {
返回this.userRepository.findOne (id);
}
}
