课堂小项目（5）

Servlet包中的内容：

package Servlet;

import Dao.DB;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.Gson;

import pojo.Lunwen;
import pojo.Word;

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.util.*;

@WebServlet("/PaperServlet")
public class PaperServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

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

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub        
        String method = request.getParameter("method");
        if(method.equals("Paper")) {
            Paper(request, response);
        }else if(method.equals("Search")){
            Search(request, response);
        }
    }

    private void Search(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
        // TODO Auto-generated method stub
        String name=request.getParameter("name");
        DB db = new DB();
        List<Lunwen> list = db.listAllWord(name);
        request.setAttribute("list",list);
        request.getRequestDispatcher("paper.jsp").forward(request, response);
    }

    private void Paper(HttpServletRequest request, HttpServletResponse response) throws IOException {
        // TODO Auto-generated method stub
        response.setCharacterEncoding("UTF-8");
        DB db = new DB();
        List<Lunwen> paperlist = db.Findlunwen();
        List<Word> wordlist = new ArrayList<Word>();
        String[] names = new String[100000];
        int count = 0;
        for(Lunwen paper:paperlist) {
            String name = paper.getTitle();
            String[] namestemp = name.split("_");
            for(int i = 0; i < namestemp.length; i++) {

                names[count++] = namestemp[i];
            }
            //names = (String[]) ArrayUtils.addAll(namestemp,names);
        }

        System.out.println(count);
        HashMap<String,Integer> name_value = new HashMap<>();
        for(String name:names) {

            if(name_value.containsKey(name)){
                name_value.put(name,name_value.get(name)+1);
            }else{
                name_value.put(name,1);
            }
        }

        List<Map.Entry<String, Integer>> list = new ArrayList<Map.Entry<String, Integer>>(name_value.entrySet()); //转换为list

        list.sort(new Comparator<Map.Entry<String, Integer>>() {
            @Override
            public int compare(Map.Entry<String, Integer> o1, Map.Entry<String, Integer> o2) {
                return o2.getValue().compareTo(o1.getValue());
            }
        });

        for (int i = 1; i <= 20; i++) {
            Word word = new Word();

                word.setName( list.get(i).getKey());
                word.setValue(list.get(i).getValue());
                wordlist.add(word);

            System.out.println(list.get(i).getKey() + ": " + list.get(i).getValue());
        }


        /*for(String name:name_value.keySet()) {
            Word word = new Word();
            if(name!=null&&(name_value.get(name)>0)&&(name.length()>2)) {
                word.setName(name);
                word.setValue(name_value.get(name));
                wordlist.add(word);
            }
        }*/
        response.setContentType("text/html;charset=utf-8");
        /*Gson gson = new Gson();
        String json = gson.toJson(wordlist);*/
        System.out.println(JSONObject.toJSON(wordlist).toString());
        response.getWriter().write(JSONObject.toJSON(wordlist).toString());
    }

    /**
     * @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 pojo.Lunwen;

import Dao.DB;
import com.alibaba.fastjson.JSONObject;
import pojo.Vo2;

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.util.ArrayList;
import java.util.List;

@WebServlet("/searchServlet")
public class searchServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        int month = Integer.parseInt(request.getParameter("month"));
        List<Lunwen> infs = new ArrayList<>();
        if(month == 1) {
            System.out.println(month);
            DB db = new DB();
            infs = db.Findlunwen();

        }else if(month == 2) {

            System.out.println("+++++++");
            String Title = request.getParameter("ltitle");
            String keywords = request.getParameter("lkey");

            String sql = "select * from lunwen where 1=1 ";

            if (!Title.equals("")) {
                sql = sql + "and title like" + "\"%" + Title + "%\"";

            }/*else if(!name.equals("")){

            sql=sql+"and name=" + "\"%" +name + "%\"";
        }*/ else if (!keywords.equals("")) {
                sql = sql + "and keywords like" + "\"%" + keywords + "%\"";

            }

            System.out.println(sql);
            DB db = new DB();
            infs = db.FindLunwenAll(sql);

        }
        response.setContentType("text/html;charset=utf-8");
        Vo2 vo = new Vo2();
        vo.setCode(0);
        vo.setMsg("success");
        vo.setCount(infs.size());
        vo.setData(infs);

        System.out.println(JSONObject.toJSON(vo).toString());
        response.getWriter().write(JSONObject.toJSON(vo).toString());


    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        this.doGet(request,response);

    }
}

标签：name,项目,request,new,import,课堂,response,String
来源： https://www.cnblogs.com/wlqyyds/p/16370217.html