Eclipse+Tomcat+Jersey 编写 REST web service

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1. Eclipse新建一个dynamic web project

2. 下载Jersey库文件，https://jersey.java.net/,将其中所有jar复制到webcontent/web-inf/lib目录下 (当前最新版本是jaxrs-ri-2.9.zip)

3. 保证当前使用的是JRE7/JDK1.7 以兼容Jersey类库

4. 编写 HelloWorld Web Service

package cn.com.chaser.restapi;import org.glassfish.jersey.filter.LoggingFilter;import org.glassfish.jersey.server.ResourceConfig;public class RestApplication extends ResourceConfig {public RestApplication() {packages("cn.com.chaser.restapi");register(LoggingFilter.class);}}

创建一 rest Api

package cn.com.chaser.restapi;import javax.ws.rs.DefaultValue;import javax.ws.rs.GET;import javax.ws.rs.Path;import javax.ws.rs.PathParam;import javax.ws.rs.Produces;import javax.ws.rs.QueryParam;import javax.ws.rs.core.MediaType;import javax.ws.rs.core.Response;@Path("/restService")public class RestService {@GET@Path("/getInfo")@Produces(MediaType.TEXT_PLAIN)public String getWebServiceInfo() {return "Hello,RESTful web service!";}@GET@Path("/{parameter}")public Response respondMessage(@PathParam("parameter") String parameter,@DefaultValue("Nothing to say") @QueryParam("value") String value) {String out = "Hello from " + parameter + ":" + value;return Response.status(200).entity(out).build();}}

@GET：表示该接口接受GET方法

@Path: 定义访问路径

@Produces(MediaType.TEXT_PLAIN)

返回文本信息

5. 编写webcontent/web-inf/web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"id="WebApp_ID" version="3.0"><display-name>RestService</display-name><servlet><servlet-name>mobile</servlet-name><servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class><init-param><param-name>javax.ws.rs.Application</param-name><param-value>cn.com.chaser.restapi.RestApplication</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>mobile</servlet-name><url-pattern>/rest/*</url-pattern></servlet-mapping><welcome-file-list><welcome-file>index.html</welcome-file><welcome-file>index.htm</welcome-file><welcome-file>index.jsp</welcome-file><welcome-file>default.html</welcome-file><welcome-file>default.htm</welcome-file><welcome-file>default.jsp</welcome-file></welcome-file-list></web-app>

6. 右键点击项目，export to war文件，到 tomcat7/webapps/目录下

7. 启动tomcat7进行测试

a) http://localhost:8080/RestService/rest/restService/getInfo

显示：

Hello,RESTful web service!

b) http://localhost:8080/RestService/rest/restService/getInfow

显示:

Hello from getInfow:Nothing to say

c) http://localhost:8080/RestService/rest/restService/wwwsw?value=24

Hello from wwwsw:24

参考：

1. http://www.vogella.com/tutorials/REST/article.html

2. https://jersey.java.net/nonav/documentation/latest/user-guide.html

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