一个Servlet处理增删改查的方法

2023-07-23 14:49:16

处理的思路是在servlet中定义不同的增删改查方法，页面请求的时候携带请求的参数，根据参数判断调用不同的方法。

package cn.xm.small.Servlet;

import java.io.IOException;

import java.text.DateFormat;

import java.text.SimpleDateFormat;

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;

import cn.xm.small.bean.Register;

import cn.xm.small.service.RegisterService;

import cn.xm.small.service.impl.RegisterServiceImpl;

/**

 * @author liqiang

 * @version 创建时间：2017年8月23日 下午8:39:34

 * @description:

 */

@WebServlet("/productServlet")

public class ProductServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        RegisterService service = new RegisterServiceImpl();

        request.setCharacterEncoding("UTF-8");

        response.setCharacterEncoding("UTF-8");

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

        String type = request.getParameter("type");

        if (type != null && "add".equals(type)) {

            try {

                this.add(request, response, service);

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

        if (type != null && "query".equals(type)) {

            try {

                this.query(request, response, service);

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

        if (type != null && "update".equals(type)) {

            try {

                this.update(request, response, service);

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

        if (type != null && "delete".equals(type)) {

            try {

                this.delete(request, response, service);

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        doGet(request, response);

    }

    @SuppressWarnings("unused")

    public void add(HttpServletRequest request, HttpServletResponse response, RegisterService service)

            throws Exception {

    }

    // 根据id删除

    public void delete(HttpServletRequest request, HttpServletResponse response, RegisterService service)

            throws Exception {

    }

    // 修改

    public void update(HttpServletRequest request, HttpServletResponse response, RegisterService service)

            throws Exception {

    }

    // 查询

    public void query(HttpServletRequest request, HttpServletResponse response, RegisterService service)

            throws Exception {

    }

}

请求的时候:

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ajax请求:

// ajax异步删除后刷新页面

function deleteInfo(id) {

    alert("dele");

    $.ajax({

        url : "/small/productServlet",

        async : true,

        type : "POST",

        data : {

            "type" : "delete",

            "id" : id

        },

        success : function(data) {

            alert(data);

            // 删除成功后刷新页面

            window.location.reload();

        },

        error : function() {

            alert("请求失败");

        },

        dataType : "text"

    });

}

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