2021 6 8

顶会热词后端servlet：

package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
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.fasterxml.jackson.databind.ObjectMapper;

import bean.paper;
import dao.dao;

/**
 * Servlet implementation class findpaper
 */
@WebServlet("/findpaper")
public class findpaper extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public findpaper() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");    
        dao p=new dao();
        String id=request.getParameter("id");    
        String name=request.getParameter("name");
        String writer=request.getParameter("writer");
        String time=request.getParameter("time");
        String keywords=request.getParameter("keywords");
//        System.out.println(id+time+name+writer+keywords);
        PrintWriter out=response.getWriter();
        String json="{}";
        try {
            List<paper> list=p.findpaper(id, name, writer, time, keywords);
            ObjectMapper om=new ObjectMapper();
            json=om.writeValueAsString(list);
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        out.println(json);
        out.flush();
        out.close();
    }

    /**
     * @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);
    }

}

package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
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.fasterxml.jackson.databind.ObjectMapper;

import bean.paper;
import dao.dao;

/**
 * Servlet implementation class getallpaper
 */
@WebServlet("/getallpaper")
public class getallpaper extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public getallpaper() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");    
        dao p=new dao();
        PrintWriter out=response.getWriter();
        String json="{}";
        try {
            List<paper> list=p.getallpaper();
            ObjectMapper om=new ObjectMapper(); //需要导包jackson
            json=om.writeValueAsString(list);
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        out.println(json);
        out.flush();
        out.close();
    }

    /**
     * @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);
    }

}