一、添加Spring Boot JPA-Hibernate步骤
1、在pom.xml添加mysql,spring-data-jpa依赖
2、在application.properties文件中配置mysql连接配置文件
3、在application.properties文件中配置JPA配置信息
4、编写测试例子
二、实战例子
1、部署文件pom.xml书写
<?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.easytest</groupId>
<artifactId>rebushu</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging> <name>rebushu</name>
<url>http://maven.apache.org</url>
<description>Demo project for Spring Boot</description> <parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties> <dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.15</version>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency> <!-- 添加fastjson 依赖包. -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.15</version>
</dependency> <!-- spring boot devtools 依赖包. -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
<scope>true</scope>
</dependency> <!-- 添加MySQL数据库驱动依赖包. -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency> <!-- 添加Spring-data-jpa依赖. -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency> </dependencies> <!--构建节点-->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!--fork : 如果没有该项配置，肯呢个devtools不会起作用，即应用不会restart -->
<fork>true</fork>
</configuration>
</plugin> </plugins>
</build> </project>
2、实体类
package com.easytest; import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id; /**
* Created by liuya on 2018-01-26.
*/
@Entity
public class Cat { /**
* 使用@Id指定主键.
* <p>
* 使用代码@GeneratedValue(strategy=GenerationType.AUTO)
* 指定主键的生成策略，mysql默认的是自增长。
*/
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int id;//主键. private String catName;//姓名. cat_name private int catAge;//年龄. cat_age; public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getCatName() {
return catName;
} public void setCatName(String catName) {
this.catName = catName;
} public int getCatAge() {
return catAge;
} public void setCatAge(int catAge) {
this.catAge = catAge;
} }
3、修改application配置文档
#######################################################
##datasource -- \u6307\u5B9Amysql\u6570\u636E\u5E93\u8FDE\u63A5\u4FE1\u606F.
#######################################################
spring.datasource.url = jdbc:mysql://localhost:3306/test
spring.datasource.username = root
spring.datasource.password = 123456
spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.max-active=20
spring.datasource.max-idle=8
spring.datasource.min-idle=8
spring.datasource.initial-size=10 ########################################################
### Java Persistence Api -- Spring jpa\u7684\u914D\u7F6E\u4FE1\u606F.
########################################################
# Specify the DBMS
spring.jpa.database = MYSQL
# Show or not log for each sql query
spring.jpa.show-sql = true
# Hibernate ddl auto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto = update
# Naming strategy
#[org.hibernate.cfg.ImprovedNamingStrategy #org.hibernate.cfg.DefaultNamingStrategy]
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
# stripped before adding them to the entity manager)
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
4、测试服务器开启
package com.easytest; import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.web.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; import java.util.ArrayList;
import java.util.List; @SpringBootApplication
public class RebushuApplication { /**
* 在这里我们使用 @Bean注入 fastJsonHttpMessageConvert
* @return
*/ @Bean
public HttpMessageConverters fastJsonHttpMessageConverters() {
// 1、需要先定义一个 convert 转换消息的对象;
FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter(); //2、添加fastJson 的配置信息，比如：是否要格式化返回的json数据;
FastJsonConfig fastJsonConfig = new FastJsonConfig();
fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat); //3、在convert中添加配置信息.
fastConverter.setFastJsonConfig(fastJsonConfig); HttpMessageConverter<?> converter = fastConverter;
return new HttpMessageConverters(converter);
} public static void main(String[] args) {
SpringApplication.run(RebushuApplication.class, args);
}
}
5、启动服务后，查看数据库
