Spring boot for Eclipse 開發指南第二節 JPA

首先給出pom.xml 其中包括了必須的jpa依賴 log4j2依賴 mysql 和 jdbc 等等

<?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>

    <groupId>com.avicsafety</groupId>
    <artifactId>webapp</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <!-- Inherit defaults from Spring Boot -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.0.RELEASE</version>
    </parent>

    <!-- Add typical dependencies for a web application -->
    <dependencies>
    	<!-- spring boot -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
             <exclusions>  
	            <exclusion>  
	                <groupId>org.springframework.boot</groupId>  
	                <artifactId>spring-boot-starter-logging</artifactId>  
	            </exclusion> 
    		</exclusions> 
        </dependency>
        
        <!-- spring boot devtools -->
		<dependency>  
		    <groupId>org.springframework.boot</groupId>  
		    <artifactId>spring-boot-devtools</artifactId>  
		    <optional>true</optional>
		</dependency> 
        
        <!-- log4j2 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>
        
        <!-- jpa -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		
		<!-- mysql -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		
		<!-- jdbc -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
		</dependency>
		
		<!-- slf4j - log4j2 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<exclusions>
	            <exclusion>
	                <groupId>org.slf4j</groupId>
	                <artifactId>slf4j-log4j2</artifactId>
	            </exclusion>
	        </exclusions>
		</dependency>
		
		<!-- alibaba -->
	    <dependency>
	        <groupId>com.alibaba</groupId>
	        <artifactId>druid</artifactId>
	        <version>1.0.18</version>
		</dependency>
		
    </dependencies>

    
    <build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<executions> 
                       <execution> 
                           <goals> 
                               <goal>repackage</goal> 
                           </goals> 
                           <configuration> 
                               <classifier>exec</classifier> 
                           </configuration> 
                       </execution> 
                    </executions>
			</plugin>
			<plugin>
			   <artifactId>maven-compiler-plugin</artifactId>
			   <configuration>
			      <source>1.8</source>
			      <target>1.8</target>
			   </configuration>
			</plugin>
		</plugins>
	</build>

</project>

 

建立實體類

package com.avicsafety.webapp.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class User {
    @Id
    @GeneratedValue
    private Long id;

    @Column(nullable = false)
    private String name;

    @Column(nullable = false)
    private Integer age;
}

 

數據訪問層

package com.avicsafety.webapp.dao;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;

import com.avicsafety.webapp.model.User;

public interface UserRepository extends JpaRepository<User, Long> {

    User findByName(String name);

    User findByNameAndAge(String name, Integer age);

    @Query("from User u where u.name=:name")
    User findUser(@Param("name") String name);

}

 

邏輯層的接口和實現

package com.avicsafety.webapp.service;

import com.avicsafety.webapp.model.User;

public interface IUserService {
	public void AddUser(User user);
}

 

package com.avicsafety.webapp.service.impl;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.avicsafety.webapp.dao.UserRepository;
import com.avicsafety.webapp.model.User;
import com.avicsafety.webapp.service.IUserService;

@Service
public class UserServiceImpl implements IUserService {
	
	private static final Log logger = LogFactory.getLog(UserServiceImpl.class);
	
	@Autowired
	UserRepository dao;

	@Override
	public void AddUser(User user) {
		// TODO Auto-generated method stub
		dao.save(user);
		logger.info("add user");
	}

}

 

控制層 

package com.avicsafety.webapp;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.avicsafety.webapp.model.User;
import com.avicsafety.webapp.service.IUserService;

@RestController
@EnableAutoConfiguration
@SpringBootApplication  
public class MyApplication {
	
	@Autowired   
	private IUserService userService;
	
 	@RequestMapping("/")
    String home() {
 		User user = new User();
 		user.setName("shili");
 		user.setAge(11);
 		userService.AddUser(user);
        return "ok";
    }
 	
    public static void main(String[] args) throws Exception {
        SpringApplication.run(MyApplication.class, args);
    }
}

 

application.properties 配置

spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://127.0.0.1/mydb?characterEncoding=utf8&zeroDateTimeBehavior=convertToNull
spring.datasource.username = root
spring.datasource.password = #####
spring.jpa.database = MYSQL
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

spring.jpa.show-sql = true

spring.jpa.hibernate.ddl-auto = update

spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

logging.config=classpath:log4j2.xml

spring.devtools.restart.enabled = true

log4j2.xml 配置

<?xml version="1.0" encoding="UTF-8"?>  
<Configuration status="DEBUG">  
    <Appenders>  
        <Console name="Console" target="SYSTEM_OUT">  
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />  
        </Console>  
    </Appenders>  
    <Loggers>  
        <Logger name="org.apache.catalina.util.LifecycleBase" level="error" />  
        <Logger name="org.apache.coyote.http11.Http11NioProtocol" level="error" />  
        <Logger name="org.apache.tomcat.util.net.NioSelectorPool" level="error" />  
        <Logger name="org.hibernate.validator.internal.util.Version" level="error" />  
        <Logger name="org.springframework" level="error" />  
        <Root level="debug">  
            <AppenderRef ref="Console" />  
        </Root>  
    </Loggers>  
</Configuration>