SpringCloud使用jpa之傳統方式
阿新 • • 發佈：2018-04-25
repo model ext tor char base 1.8 mysql5 info
不說廢話，直接上代碼：
pom.xml
<?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.shinho</groupId> <artifactId>dbmeta</artifactId> <version>0.0.1</version> <packaging>jar</packaging> <name>dbmeta</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.1.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> <spring-cloud.version>Finchley.M9</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>4.3.14.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-rest</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>0.2.9</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-ehcache</artifactId> <version>5.2.16.Final</version> </dependency> <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> <version>2.9.0</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <repositories> <repository> <id>ali</id> <name>ali Repository</name> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> <repository> <id>clojars</id> <name>Clojars repository</name> <url>https://clojars.org/repo</url> </repository> </repositories> </project>
application.yml
eureka:
client:
serviceUrl:
defaultZone: http://192.168.40.132:7087/eureka
server:
port: 7088
spring:
application:
name: service-dbmeta
datasource:
type: com.alibaba.druid.pool.DruidDataSource
url: jdbc:mysql://127.0.0.1:3306/shbi?characterEncoding=utf8
username: root
password: root
driverClassName: com.mysql.jdbc.Driver
initialSize: 5
minIdle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
maxPoolPreparedStatementPerConnectionSize: 20
filters: stat,wall,log4j
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
useGlobalDataSourceStat: true
jpa:
database: MYSQL
show-sql: false
generate-ddl: true
hibernate:
ddl-auto: create
naming_strategy: org.hibernate.cfg.ImprovedNamingStrategy
properties:
hibernate:
dialect: org.hibernate.dialect.MySQL5Dialect
cache:
region.factory_class: org.hibernate.cache.ehcache.EhCacheRegionFactory
provider_configuration_file_resource_path: ehcache.xml
實體類Tables.java
package com.shinho.entity; import java.io.Serializable; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; import org.hibernate.annotations.Cache; import org.hibernate.annotations.CacheConcurrencyStrategy; @Entity @Table(name="tables",catalog = "shbi") @Cache(usage = CacheConcurrencyStrategy.READ_WRITE) public class Tables implements Serializable{ private static final long serialVersionUID = 1L; private int tableid; private String tablename; private int dbid; private String tabletext; @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "tableid", unique = true, nullable = false) public int getTableid() { return tableid; } public void setTableid(int tableid) { this.tableid = tableid; } @Column(name = "tablename", nullable = false) public String getTablename() { return tablename; } public void setTablename(String tablename) { this.tablename = tablename; } @Column(name = "dbid") public int getDbid() { return dbid; } public void setDbid(int dbid) { this.dbid = dbid; } @Column(name = "tabletext") public String getTabletext() { return tabletext; } public void setTabletext(String tabletext) { this.tabletext = tabletext; } }
數據庫訪問層TablesDao.java
package com.shinho.dao; import org.springframework.data.jpa.repository.Query; import org.springframework.data.repository.CrudRepository; import com.shinho.entity.Tables; public interface TablesDao extends CrudRepository<Tables, Integer> { @Query(value="select count(*) from props",nativeQuery=true) int getcount(); }
最後，執行類 DbmetaApplication.java
package com.shinho; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.servlet.config.annotation.EnableWebMvc; import com.shinho.dao.TablesDao; @Configuration @EnableAutoConfiguration @ComponentScan(basePackages={"com.shinho"}) @EnableWebMvc @EnableEurekaClient @RestController public class DbmetaApplication { private static final Logger logger = Logger.getLogger(DbmetaApplication.class); public static void main(String[] args) { SpringApplication.run(DbmetaApplication.class, args); } @Value("${server.port}") String port; @RequestMapping("/hi") @Bean public String home(TablesDao dao) { logger.info("測試"); int ishas = dao.getcount(); return ishas+""; } }
補充說明：
- 執行類上一定要加@EnableWebMvc，否則不好使。
- hibernate-ehcache的版本一定要和jpa裏面的hibernate裏面的一致，可以看pom文件的Dependency Hierarchy裏面的。
- MySql裏面Tables是個系統表，不要用這個名字。
SpringCloud使用jpa之傳統方式