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servlet与jsp篇（一）$.ajax交互
servlet其实是利用java类编写的服务器端应用程序，他的生命周期可以分为三个阶段：初始化阶段、运行阶段和消亡阶段;
jsp页面实质上是一个HTML页面，但他包含了用户产生动态网页内容的java代码。
他们之间的联系千丝万缕，今天就跟大家分享一下最近的学习心得：通过JQuery的$.ajax()实现两者的交互。
1.servlet代码：servlet1.java
package servlet1;import iface.RemoteServer;import iface.Thrift_TargetInfo;import net.sf.json.JSONArray;import org.apache.thrift.TException;import org.apache.thrift.protocol.TBinaryProtocol;import org.apache.thrift.protocol.TProtocol;import org.apache.thrift.transport.TSocket;import org.apache.thrift.transport.TTransport;import org.apache.thrift.transport.TTransportException;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;@WebServlet(name = "Servlet1", urlPatterns = "/getTgs")public class Servlet1 extends HttpServlet { private static final int SERVER_PORT = 16003; private static final String SERVER_IP = "192.168.31.235"; public static RemoteServer.Client Thrift_Client; public static TTransport Thrift_transport; public void startClient() throws TTransportException { int TIMEOUT = 30000; Thrift_transport = new TSocket(SERVER_IP, SERVER_PORT, TIMEOUT); TProtocol protocol = new TBinaryProtocol(Thrift_transport); Thrift_Client = new RemoteServer.Client(protocol); Thrift_transport.open(); System.out.println("Thrift16003端口已开启,客户端已创建..."); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { JSONArray jsonArray = new JSONArray(); try { startClient(); ArrayList<Thrift_TargetInfo> ships = (ArrayList<Thrift_TargetInfo>) Thrift_Client.Thrift_GetTarget(); jsonArray = JSONArray.fromObject(ships); System.out.println(jsonArray); } catch (TException e) { e.printStackTrace(); } //向前台的页面输出数据jsonArray PrintWriter out = response.getWriter(); out.println(jsonArray); out.close(); }}
2.jsp页面中只需插入以下的脚本方法即可
var radarTgs;$(function () { $.ajax({ dataType: "json", //数据类型为json格式 contentType: "application/x-www-form-urlencoded; charset=utf-8", type: "GET", url: "/getTgs", statusCode: { 404: function () { alert(‘page not found‘); } }, success: function (data) { radarTgs = data; } });});
3.输出radarTgs,查看内容，数据获取成功！
servlet与jsp篇（一）$.ajax交互
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