JaveWeb 公司项目(3)----- 通过Thrift端口获取数据库数据

前面两篇博客的内容主要是界面搭建的过程,随着界面搭建工作的完成,网页端需要加入数据,原先的B/S架构中C#通过Thrift接口获取数据,所以在网页端也沿用这个设计

首先,新建一个Maven下的Web项目。

在Main文件夹下面新建一个Java的文件夹,在Java文件夹下面新建两个文件夹,此处我命名为com.thrift.iface(Thrift接口)和JSPServlet,在com.thrift.iface文件夹下导入.java类型的Thrift数据,在JSPServlet文件夹下面新建Servlrt类型的文件,将java文件夹改为Sources类型,在pom.xml中导入需要引用的jar包,代码在之后写的一篇idea创建maven项目的博客中有提到,网址如下:http://www.cnblogs.com/Liu30/p/7268138.html

首先定义一个Servlrt基类:

 1 package com.fis.iface;
 2 import com.fis.thrift.RemoteServer.Client;
 3 import org.apache.thrift.protocol.TBinaryProtocol;
 4 import org.apache.thrift.protocol.TProtocol;
 5 import org.apache.thrift.transport.TSocket;
 6 import org.apache.thrift.transport.TTransport;
 7 import org.apache.thrift.transport.TTransportException;
 8 
 9 import javax.servlet.ServletException;
10 import javax.servlet.annotation.WebServlet;
11 import javax.servlet.http.HttpServlet;
12 import javax.servlet.http.HttpServletRequest;
13 import javax.servlet.http.HttpServletResponse;
14 import java.io.IOException;
15 
16 @WebServlet(name = "UBaseServlet")
17 public class UBaseServlet extends HttpServlet {
18     protected TTransport thrift_transport;
19     protected Client Thrift_Client;
20 
21     protected void startClient() throws TTransportException {
22         thrift_transport = new TSocket("IP地址", 端口号,);
23         TProtocol protocol = new TBinaryProtocol(thrift_transport);
24         Thrift_Client = new Client(protocol);
25         thrift_transport.open();
26     }
27 
28     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
29 
30     }
31 
32     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
33 
34     }
35 
36     protected void closeClient() throws TTransportException {
37         thrift_transport.close();
38         Thrift_Client = null;
39     }
40 }
Servlet基类代码

然后新建其他的servlet文件,继承这个基类,例如,我要通过Thrift获取一个list数组,servlret文件下的代码如下:

package com.fis.iface;

import com.fis.thrift.Thrift_Law;
import com.fis.thrift.Thrift_Sign;
import net.sf.json.JSONArray;
import org.apache.thrift.TException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

//继承基类,设置servlet的名称和设置url路径
@WebServlet(name = "servler文件名",urlPatterns = "/路径名称")
public class getlawsnames extends UBaseServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //设置编码的格式,避免乱码
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=utf-8");
        try {
            startClient();
            //在这里定义thrift函数实例
            closeClient();
            JSONArray jsonArray = JSONArray.fromObject(Thrift实例名);
            PrintWriter out = response.getWriter();
            out.println(jsonArray);
            out.flush();
            out.close();
        } catch (TException e) {
            e.printStackTrace();
        }
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }
}
servlet获取数据实例

值得一提的是,有时候我们从Thrift中获取的数据显示出来是乱码,因为编码方式不统一的缘故,只要在dopost函数前加这么两句话即可:

request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=utf-8");

新建一个JS文件,通过Ajax获取数据

function getLogInfo() {
    $.ajax({
        dataType: "json",    //数据类型为json格式
        contentType: "application/x-www-form-urlencoded; charset=utf-8",
        type: "POST",
        url: "/刚才设置的thrift路径",  
        statusCode: {
            404: function () {
                alert('没有获取到数据');
            }
        },
        success: function (data) {
            alert('成功获取到数据');
            //这个data就是获取到得数据
        }
    });

在主页面中加载这个JS文件即可。

 

posted @ 2017-05-08 09:42  StephenCurry  阅读(926)  评论(0编辑  收藏  举报