可用的框架有不少，我用的是jersey。
直接上代码，其实，如果你会web service 这个restful的就很好理解了，自己跑一遍就OK了
用到的类
User.java
package demo.helloworld; import javax.xml.bind.annotation.XmlRootElement; /**
* @author edi_kai
* @version 创建时间：2015-8-20 下午03:46:24
* 类说明
*/
@XmlRootElement(name="User")
public class User { private String userName;
private String sex;
private int age; public User(String userName, String sex, int age) {
super();
this.userName = userName;
this.sex = sex;
this.age = age;
} public User() {
super();
} public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
RestfulService.java
package demo.helloworld; import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType; /**
* @包名 demo.RestfulService
* @文件名 RestfulService.java
* @作者 edi_kai
* @创建日期 2015年8月20日
* @版本 V 1.0
* @描述
*/
@Path("/service")
public class RestfulService{ final String XMLNS_NAMESPACE = "http://www.cnblogs.com/edi-kai/service";
final String ROOT_NODE = "root"; @GET
@Produces("application/json")
@Path("/json")
public User getJsonMessage() {
User user = new User("admin", "BeiJing", 25);
return user;
} @GET
@Produces(MediaType.APPLICATION_XML)
@Path("/xml")
public User getXmlMessage() {
User user = new User("admin", "BeiJing", 25);
return user;
} @POST
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
@Path("/getUser")
public User getMessageByJson(User user) {
System.out.println(user.getUserName());
return user;
} }
web.xml文件配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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"> <servlet>
<servlet-name>rsServlet</servlet-name>
<servlet-class>
com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class> <!-- 不加这个，格式转换会有问题，比如JSON/XML -->
<init-param>
<param-name>javax.ws.rs.core.Application</param-name>
<param-value>javax.ws.rs.core.Application</param-value>
</init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping>
<servlet-name>rsServlet</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping> <welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list> </web-app>
最后是调用的代码，我这里为了省事，直接在JSP里面用ajax调用的，代码如下：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript"
src="<%=request.getContextPath()%>/js/jquery-1.9.1.js"></script>
<script type="text/javascript"
src="<%=request.getContextPath()%>/js/json2.js"></script>
</head>
<body>
This is my JSP page.
<br>
</body> <script type="text/javascript">
$(function(){
/*
alert(JSON.stringify(
{"productName":"Java编程思想（第4版）",
"isbn":"9787111213826",
"author":"[美]埃克尔",
"publishDate":1183270161125}
));
*/
var url = "rest/helloworld/getUser";
var url_1 = "http://10.169.217.198:5000/wa_cancel"; var param = JSON.stringify(
{"userName":"Java编程思想（第4版）",
"sex":"男",
"age":25}
);
var param_1 = JSON.stringify(
{'WithdrawID': 'APP2015062610000003',
'TranTime': '1438589070',
'Uid': '100163',
'Sign': '599ba17c1b882d0eb57c22572c12e006'}
);
$.ajax({
type : "POST",
url : url_1,
dataType : "json",
contentType : "application/json",
data : param_1,
success : function(data){
alert("以下是从服务器返回的User对象:\n\n" + JSON.stringify(data));
},
error : function(jqXHR, textStatus, errorThrown){
console.info('error: ' + textStatus+','+jqXHR+','+errorThrown);
}
});
});
</script>
</html>
可能会用到的jar包，我添加了这些，但可能有些是用不到的，注意要讲其中的asm-3.3.1.jar、jersey-bundle-1.9.1.jar、jettison-1.1.jar、jsr311-api-1.1.1.jar这四个jar包放到tomcat的lib目录下才可以
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" alt="" />
最后附上jar包的下载地址jar.zip