用Jersey构建RESTful服务1--HelloWorld

ゝ一世哀愁。 2022-08-25 15:59 185阅读 0赞

一、环境  
1、Eclipse Juno R2  
2. Tomcat 7  
3. Jersey 2.7  下载地址（ https://jersey.java.net/download.html）  
  
  
二、流程  
1.Eclipse 中创建一个 Dynamic Web Project ,本例为“RestDemo”

2.按个各人习惯建好包，本例为“com.waylau.rest.resources”

![0b55b319ebc4b745429f78adcdfc1e178a821505.jpg_referer_0b4df88379f40ad14cf3f2d3531c_x_.jpg][]

3.解压jaxrs-ri-2.7，

将api、ext、lib文件夹下的jar包都放到项目的lib下；

![f31fbe096b63f6242082f6b88544ebf81b4ca3aa.jpg_referer_dc3f5bcfaf3459829c9dd1a20d68_x_.jpg][]

项目引入jar包

![63d0f703918fa0ec3bccabb6249759ee3d6ddb06.jpg_referer_1b02ce10013b5bb5e7c015ce251c_x_.jpg][]

4.在resources包下建一个class“HelloResource”

package com.waylau.rest.resources;
    
    
    import javax.ws.rs.GET;
    import javax.ws.rs.Path;
    import javax.ws.rs.Produces;
    import javax.ws.rs.PathParam;
    import javax.ws.rs.core.MediaType;
    
    
    @Path("/hello")
    public class HelloResource {
    	@GET
    	@Produces(MediaType.TEXT_PLAIN)
    	public String sayHello() {
    		return "Hello World!" ;
    	}
     
    	
    	@GET
    	@Path("/{param}")  
    	@Produces("text/plain;charset=UTF-8")
    	public String sayHelloToUTF8(@PathParam("param") String username) {
    		return "Hello " + username;
    	}
    	
    }

5.修改web.xml,添加基于Servlet-的部署

<servlet>  
         <servlet-name>Way REST Service</servlet-name>
    	 <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
           <init-param>  
    		<param-name>jersey.config.server.provider.packages</param-name>
          	<param-value>com.waylau.rest.resources</param-value>
       	   </init-param>
        <load-on-startup>1</load-on-startup>
      </servlet>
      
      <servlet-mapping>
        <servlet-name>Way REST Service</servlet-name>
        <url-pattern>/rest/*</url-pattern>
      </servlet-mapping>

6.项目部署到tomcat,运行  
7.浏览器输入要访问的uri地址  
[http://localhost:8089/RestDemo/rest/hello][http_localhost_8089_RestDemo_rest_hello]

输出Hello World!

![d000baa1cd11728b8db54399cafcc3cec2fd2cf5.jpg_referer_02302bc8af4bd1135dda83028cab_x_.jpg][]

[http://localhost:8089/RestDemo/rest/hello/Way你好吗][http_localhost_8089_RestDemo_rest_hello_Way]  
  
  
输出Hello Way你好吗  
  
  ![14ce36d3d539b6006511c00ceb50352ac75cb7aa.jpg_referer_240eae6c34d12f2e97129a50f168_x_.jpg][]  
  
参考：https://jersey.java.net/documentation/latest/user-guide.html

[0b55b319ebc4b745429f78adcdfc1e178a821505.jpg_referer_0b4df88379f40ad14cf3f2d3531c_x_.jpg]: /images/20220824/9843f7486af44e7792de9d3496b9f0d5.png
[f31fbe096b63f6242082f6b88544ebf81b4ca3aa.jpg_referer_dc3f5bcfaf3459829c9dd1a20d68_x_.jpg]: /images/20220824/9e2477487faa4046a80eaed20c2322ce.png
[63d0f703918fa0ec3bccabb6249759ee3d6ddb06.jpg_referer_1b02ce10013b5bb5e7c015ce251c_x_.jpg]: /images/20220824/cc23ab3c86974c6d8d5920c2c0f06a8a.png
[http_localhost_8089_RestDemo_rest_hello]: http://localhost:8089/RestDemo/rest/hello
[d000baa1cd11728b8db54399cafcc3cec2fd2cf5.jpg_referer_02302bc8af4bd1135dda83028cab_x_.jpg]: /images/20220824/2e4254d54bc844c6a7772dcedf785b17.png
[http_localhost_8089_RestDemo_rest_hello_Way]: http://localhost:8089/RestDemo/rest/hello/Way你好吗
[14ce36d3d539b6006511c00ceb50352ac75cb7aa.jpg_referer_240eae6c34d12f2e97129a50f168_x_.jpg]: /images/20220824/ff809ec56c84469283f48521f58c5baf.png