Spring4-@PostConstruct和@PreDestroy注解的使用
Posted
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了Spring4-@PostConstruct和@PreDestroy注解的使用相关的知识，希望对你有一定的参考价值。
1.创建Maven项目,项目名称springdemo41,如图所示
2.配置Maven,修改项目中的pom.xml文件,修改内容如下
<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>1.0.0</modelVersion> <groupId>shequ</groupId> <artifactId>springdemo13</artifactId> <version>0.0.1-SNAPSHOT</version> <properties> <java.version>1.7</java.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> </properties> <repositories> <repository> <id>codelds</id> <url>https://code.lds.org/nexus/content/groups/main-repo</url> </repository> </repositories> <dependencies> <dependency> <groupId>javax.annotation</groupId> <artifactId>jsr250-api</artifactId> <version>1.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.1.4.RELEASE</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.10</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.4.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.1.4.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.1.4.RELEASE</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.34</version> </dependency> </dependencies> <build/> </project>
3.在src/main/java下创建实体Bean Forum,包名(com.mycompany.shequ.bean)如图所示
4.实体Bean Forum的内容如下
package com.mycompany.shequ.bean;
public class Forum {
private int fid;
private String name;
private int displayOrder;
public int getDisplayOrder() {
return displayOrder;
}
public void setDisplayOrder(int displayOrder) {
this.displayOrder = displayOrder;
}
public int getFid() {
return fid;
}
public void setFid(int fid) {
this.fid = fid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "{fid=>"+this.fid+",name=>"+this.name+",displayOrder=>"+this.displayOrder+"}";
}
}5.在src/main/java下创建接口IForumService,包名(com.mycompany.shequ.service)如图所示
6.接口IForumService的内容如下
package com.mycompany.shequ.service;
import com.mycompany.shequ.bean.Forum;
public interface IForumService {
public Forum findForumById(int fid);
}7.在src/main/java下创建接口IForumService的实现类ForumServiceImpl,包名(com.mycompany.shequ.service.impl)如图所示
8.接口IForumService的实现类ForumServiceImpl的内容如下
package com.mycompany.shequ.service.impl;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import com.mycompany.shequ.bean.Forum;
import com.mycompany.shequ.service.IForumService;
public class ForumServiceImpl implements IForumService {
@PreDestroy
public void destroyMethod(){
System.out.println("destroy-method");
}
@PostConstruct
public void initMethod(){
System.out.println("init-method");
}
public Forum findForumById(int fid) {
Forum forum = new Forum();
forum.setName("init-method 与 destroy-method");
return forum;
}
}9.在src/main/resource下创建bean的配置文件spring-bean.xml,如图所示
10.配置文件spring-bean.xml的内容如下
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd "> <context:annotation-config /> <bean id="forumservicebean" class="com.mycompany.shequ.service.impl.ForumServiceImpl"> </bean> </beans>
11.在src/main/resource下创建核心的配置文件applicationContext.xml,如图所示
12.核心的配置文件applicationContext.xml的内容如下
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd"> <import resource="bean/spring-bean.xml"/> </beans>
13.在src/test/java下创建测试文件AppTest,包名(com.mycompany.shequ.test)如图所示
14.测试文件AppTest的内容如下
package com.mycompany.shequ.test;
import org.junit.Test;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.mycompany.shequ.service.IForumService;
public class AppTest {
@Test
public void beanTest(){
ConfigurableApplicationContext context = new
ClassPathXmlApplicationContext("applicationContext.xml");
IForumService forumService = (IForumService)context.getBean("forumservicebean");
System.out.println(forumService.findForumById(1));
context.close();
}
} 15.在测试类AppTest的beanTest方法上右键运行,输出结果如图所示
本文出自 “素颜” 博客，谢绝转载！
以上是关于Spring4-@PostConstruct和@PreDestroy注解的使用的主要内容，如果未能解决你的问题，请参考以下文章