Spring集成Jersey开发(附demo)

下文将会初步介绍如何在Spring中集成Jersey，并附简单的demo

所依赖的技术版本：

Jersey 1.8

Spring 3.0.5.RELEASE

1. 项目依赖

pom.xml定义(注意去除jersey中引入的低版本的spring包)

<repositories>
<repository>
<id>maven2-repository.java.net</id>
<name>Java.net Repository for Maven</name>
<url>http://download.java.net/maven/2/</url>
</repository>
</repositories>

<dependencies>
<!-- Jersey -->
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.8</version>
</dependency>

<!-- Spring 3 dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>

<!-- Jersey + Spring -->
<dependency>
<groupId>com.sun.jersey.contribs</groupId>
<artifactId>jersey-spring</artifactId>
<version>1.8</version>
<exclusions>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>

2. Spring Bean

定义一个名为“demoService”的bean，稍后我们会将其注入到jersey资源中

接口

package org.qunyang.service;

public interface DemoService{

String say();

}

实现类

package org.qunyang.service.impl;

import org.qunyang.service.DemoService;

public class DemoServiceImpl implements DemoService {

public String say() {

return "Hello Jersey";

}

}

spring配置

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 
<context:component-scan base-package="org.qunyang.*" />

<bean id="demoService" class="org.qunyang.service.impl.DemoServiceImpl" />

</beans>

3. Jersey

我们将刚才声明的的bean通过自动注入的方式注入到jersey资源中

package org.qunyang.rest;

import javax.ws.rs.GET;
import javax.ws.rs.Path;

import org.qunyang.service.DemoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
@Path("/demo")
public class RestfulService {

@Autowired
DemoService demoService;

@GET
@Path("/hello")
public String sayHello() {
return demoService.say();

}

}

4. 集成Spring和Jersey

集成最后的一步，也是最重要的一步，打开web.xml

<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>Restful Web Application</display-name>

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<servlet>
<servlet-name>jersey-serlvet</servlet-name>
<servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>com.mkyong.rest</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>jersey-serlvet</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>

</web-app>

这里有一点需要注意：

Jersey的servlet-class一项，一定是上面所示的：

<servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>

请不要换成其它的类，以免发生bean不能正常注入的问题

5. 运行结果

6.Demo

RESTfulDemo.zip

致谢：

本文参考 http://www.mkyong.com/webservices/jax-rs/jersey-spring-integration-example