tomcat服务器用Servlet类查找磁盘文件上的Json信息，如果匹配则在浏览器上显示出该条内容的全部信息

package com.swift;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

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 com.google.gson.Gson;

/**
* Servlet implementation class FindServlet
*/
@WebServlet("/find")
public class FindServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#HttpServlet()
*/
public FindServlet() {
super();
// TODO Auto-generated constructor stub
}

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
BufferedReader br=new BufferedReader(new InputStreamReader(new FileInputStream("d:/student.json"),"utf-8"));
List<Student> list=new ArrayList<Student>();
String str;
while((str=br.readLine())!=null) {
Gson gson=new Gson();
Student stu=gson.fromJson(str, Student.class);
list.add(stu);
}
br.close();
String name=request.getParameter("name");
for(Student stu:list) {
if(stu.getName().equals(name)) {
Gson gson=new Gson();
String json=gson.toJson(stu);
response.getWriter().println(json);
}
}
}

/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}

}