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Spring4-自定义MyRequired相当与@Required

时间:2017-03-24 21:06:08      阅读:187      评论:0      收藏:0      [点我收藏+]

标签:spring4-自定义myrequired相当与@required

1.创建Maven项目,项目名称springdemo39,如图所示

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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>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

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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下创建实体Bean ForumPost,包名(com.mycompany.shequ.bean)如图所示

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6.实体Bean ForumPost的内容如下

package com.mycompany.shequ.bean;

import com.mycompany.shequ.annotaion.MyRequired;

public class ForumPost {
	private int pid;
	private String name;
	private Forum forum;
	public int getPid() {
		return pid;
	}
	public void setPid(int pid) {
		this.pid = pid;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Forum getForum() {
		return forum;
	}
	@MyRequired
	public void setForum(Forum forum) {
		this.forum = forum;
	}
}


7.在src/main/java下创建注解MyRequired,包名(com.mycompany.shequ.annotaion)如图所示

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8.注解MyRequired的内容如下

package com.mycompany.shequ.annotaion;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface MyRequired {

}


9.在src/main/resource下创建bean的配置文件spring-bean.xml,如图所示

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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
	">
	
	<!-- 设置自定义的注解 -->
	<bean class="org.springframework.beans.factory.annotation.RequiredAnnotationBeanPostProcessor">
	    <property name="requiredAnnotationType" value="com.mycompany.shequ.annotaion.MyRequired">
	    </property>
	</bean>
	
	<bean id="forumpostbean" class="com.mycompany.shequ.bean.ForumPost">
		<property name="pid" value="1"></property>
		<property name="name" value="自定义注解"></property>
		<property name="forum" ref="forumbean"></property>
	</bean>
	
	<bean id="forumbean" class="com.mycompany.shequ.bean.Forum">
		<property name="fid" value="1"></property>
		<property name="name" value="被依赖的bean"></property>
	</bean>
</beans>


11.在src/main/resource下创建核心的配置文件applicationContext.xml,如图所示

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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

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14.测试文件AppTest的内容如下

package com.mycompany.shequ.test;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.mycompany.shequ.bean.ForumPost;

public class AppTest {
	
	@Test
	public void beanTest(){
	    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
		ForumPost forumPost = (ForumPost)context.getBean("forumpostbean");
		System.out.println(forumPost);
	}
}


15.在测试类AppTest的beanTest方法上右键运行,输出结果如图所示

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本文出自 “素颜” 博客,谢绝转载!

Spring4-自定义MyRequired相当与@Required

标签:spring4-自定义myrequired相当与@required

原文地址:http://suyanzhu.blog.51cto.com/8050189/1910076

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