這裡就不介紹Jersey了，它Sun自己實現的一個RESTFUL Web Service。具體看這裡：使用 Jersey 和 Apache Tomcat 構建 RESTful Web 服務
我這裡要說的是關於如何擷取前台ajax請求的json資料。網上搜了很多都沒有講這一塊的，要麼都是用client來類比，我這裡測試成功了，先給出方法。
廢話少說，先上代碼：
首先是jsp頁面ajax請求：
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title><script type="text/javascript" src="js/jquery-1.7.1.js"></script><script type="text/javascript">$.ajax( {url : '/CPSolutionTest/services/update',type : 'POST',data : {a1:"a1111",a2:"a22222"},dataType : 'json',contentType:'application/json',async : false,success : function(data) {alert("success");alert(data.name);alert(data.age);$.ajax( {url : '/CPSolutionTest/services/requestTest',type : 'GET',data : {a11:"a1111111111111",a22:"a2222222222222"},dataType : 'json',contentType:'application/json',async : false,success : function(data) {alert("success");alert(data.name);alert(data.age);},error : function() {alert("ajax error");}});},error : function() {alert("ajax error");}});</script></head><body></body></html>
後台resource處理：
@Path("/")public class HelloWorld { @GET @Path("/helloWorld") @Produces(MediaType.TEXT_PLAIN) public String abc() { String ret = "Hello World!"; return ret; } @POST @Path("/update") @Produces("application/json") public Person update(@FormParam(value = "a1") String a1, @FormParam(value = "a2") String a2) { System.out.println(a1); System.out.println(a2); return new Person("testPerson", "22"); } @GET @Path("/requestTest") @Produces("application/json") public Person update(@Context HttpServletRequest request) { System.out.println("request:" + request.getParameter("a11")); System.out.println("request:" + request.getParameter("a22")); System.out.println("request:" + request.getQueryString()); return new Person("testPerson", "33"); }}
注意上面的ajax請求，第一個是post請求的update方法，@FormParam(value = "a1") String a1, @FormParam(value = "a2") String a2 這裡的a1 和 a2就是前台傳來的參數了，在update方法裡就可以使用了。但是如果json資料很多，我們不可能在方法裡一個個列出來，另外一種方法就是通過request來擷取：@Context HttpServletRequest request。這裡要注意的是請求的方法是GET。這樣我們就可以很輕鬆的拿到前台json傳來的參數了。而且可以擷取session裡的值。
這個測試就到這，謝謝
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