一个web小项目03

package servlets;

import java.io.IOException;
import java.util.*;
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.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;


import src.bean.BookInfo;

/**
 * 接受客户端后缀为action的请求，并进行处理，并返回响应
 * 
 * @author Leiyu
 * @version 1.0
 *
 */
@WebServlet("*.action")
public class AjaxController extends HttpServlet {
   private static final long serialVersionUID = 1L;

   public AjaxController() {
      super();
      // TODO Auto-generated constructor stub
   }

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

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

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

      String actionUrl = request.getServletPath(); // 获取客户端的访问URL地址信息
      
      if (actionUrl.equals("/list.action")) { // 查询所有图书
         ArrayList<BookInfo> list = BookInfo.getBookList(); // 调用BookInfo的getBookList方法完成
         // 使用JSONArray对象将结果构建为json对象并输出到客户端
         JSONArray jsonArray = new JSONArray();
         for (int i = 0; i < list.size(); i++) {
            BookInfo book = list.get(i);
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("id", book.getId());
            map.put("bookname", book.getBookname());
            map.put("author", book.getAuthor());
            map.put("price", book.getPrice());
            JSONObject BookObj = new JSONObject(map);
            jsonArray.add(BookObj);
         }
         // 向客户端返回json结果
         response.getWriter().print(jsonArray.toString());

      } else if (actionUrl.equals("/add.action")) { // 增加图书操作
         BookInfo bi = new BookInfo();
         bi.setBookname(request.getParameter("bookname"));
         bi.setAuthor(request.getParameter("author"));
         bi.setPrice(request.getParameter("price"));
      
         int r = BookInfo.addBook(bi); // 调用BookInfo的addBook方法完成
         // 向客户端返回结果
         response.getWriter().print(r);

      } else if (actionUrl.equals("/edit.action")) { // 编辑图书操作
         String id = request.getParameter("id");
         BookInfo bi = BookInfo.getBookById(id); // 调用BookInfo的getBookById方法完成
         // 将该对象构建为json数据
         Map<String, Object> map = new HashMap<String, Object>();
         map.put("id", bi.getId());
         map.put("bookname", bi.getBookname());
         map.put("author", bi.getAuthor());
         map.put("price", bi.getPrice());
         JSONObject BookObj = new JSONObject(map);
         // 向客户端返回结果
         response.getWriter().print(BookObj.toString());

      } else if (actionUrl.equals("/update.action")) { // 更新图书操作
         BookInfo bi = new BookInfo();
         bi.setId(request.getParameter("id"));
         bi.setBookname(request.getParameter("bookname"));
         bi.setAuthor(request.getParameter("author"));
         bi.setPrice(request.getParameter("price"));
         int r = BookInfo.updateBook(bi);// 调用BookInfo的updateBook方法完成
         response.getWriter().print(r); // 向客户端返回结果

      } else if (actionUrl.equals("/delete.action")) { // 删除图书操作
         String id = request.getParameter("id");
         int r = BookInfo.deleteBook(id); // 调用BookInfo的deleteBook方法完成
         response.getWriter().print(r); // 向客户端返回结果
      }
   }

}

标签：web,项目,03,request,bi,BookInfo,getParameter,map,import
来源： https://www.cnblogs.com/libin159/p/16373029.html