JAVA-EE针对内容删除并重定向回到当前页面的实现------计算机网络经典

喜欢ヅ旅行 2024-02-23 00:59 14阅读 0赞

>     package com.bjpowernode.oa.web.action;
>     
>     import com.bjpowernode.oa.utils.DBUtil;
>     import jakarta.servlet.ServletException;
>     import jakarta.servlet.http.HttpServlet;
>     import jakarta.servlet.http.HttpServletRequest;
>     import jakarta.servlet.http.HttpServletResponse;
>     
>     import java.io.IOException;
>     import java.io.PrintWriter;
>     import java.sql.Connection;
>     import java.sql.PreparedStatement;
>     import java.sql.ResultSet;
>     import java.sql.SQLException;
>     
>     public class DeptListServlet extends HttpServlet
>     {
>         @Override
>         protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
>         {
>             String contextPath = request.getContextPath();
>             Connection connection = null;
>             PreparedStatement statement = null;
>             ResultSet resultSet = null;
>             response.setContentType("text/html;charset=UTF-8");
>             PrintWriter writer = response.getWriter();
>             writer.println("<!DOCTYPE html>");
>             writer.println("<html>");
>             writer.println("	<head>");
>             writer.println("		<meta charset='utf-8'>");
>             writer.println("		<title>部门列表</title>");
>             writer.println("	</head>");
>             writer.println("	<body>");
>             writer.println("\t<script type=\"text/javascript\">\n" +
>                     "\t\tfunction del(dno){\n" +
>                     "\t\t\tvar ok = window.confirm(\"是否确认删除该数据\");\n" +
>                     "\t\t\tif(ok)\n" +
>                     "\t\t\t{\n" +
>                     "\t\t\t\twindow.location.href = \"" + contextPath + "/dept/delete?deptno=\"+dno\n" +
>                     "\t\t\t}\n" +
>                     "\t\t}\n" +
>                     "\t</script>");
>             writer.println("		<h1 align='center'>部门列表</h1>");
>             writer.println("		<hr>");
>             writer.println("		<table align='center' border='1px' width='50%'>");
>             writer.println("			<tr>");
>             writer.println("				<th>序号</th>");
>             writer.println("				<th>部门编号</th>");
>             writer.println("				<th>部门名称</th>");
>             writer.println("				<th>操作</th>");
>             writer.println("			</tr>");
>             try
>             {
>                 connection = DBUtil.getConnection();
>                 String sql = "select * from dept";
>                 statement = connection.prepareStatement(sql);
>                 resultSet = statement.executeQuery();
>                 int i = 0;
>                 while(resultSet.next())
>                 {
>                     String deptno = resultSet.getString("deptno");
>                     String dname = resultSet.getString("dname");
>                     String loc = resultSet.getString("loc");
>                     writer.println("			<tr>");
>                     writer.println("				<td>" + (++i) + "</td>");
>                     writer.println("				<td>" + (deptno) + "</td>");
>                     writer.println("				<td>" + (dname) + "</td>");
>                     writer.println("				<td>");
>                     writer.println("					<a href=\"javascript:void(0)\"  onclick=\"del("+(deptno)+")\">删除</a>");
>                     writer.println("					<a href='edit.html'>修改</a>");
>                     writer.println("					<a href='" + (contextPath) + "/dept/detail?deptno=" + deptno +"'>详情</a>");
>                     writer.println("				</td>");
>                     writer.println("			</tr>");
>                 }
>             }
>             catch (SQLException e)
>             {
>                 throw new RuntimeException(e);
>             }
>             finally
>             {
>                 DBUtil.close(connection,statement,resultSet);
>             }
>             writer.println("		</table>");
>             writer.println("		<hr>");
>             writer.println("		<a href='add.html'>新增部门</a>");
>             writer.println("	</body>");
>             writer.println("</html>");
>         }
>     }
> 
>     package com.bjpowernode.oa.web.action;
>     
>     import com.bjpowernode.oa.utils.DBUtil;
>     import jakarta.servlet.ServletException;
>     import jakarta.servlet.http.HttpServlet;
>     import jakarta.servlet.http.HttpServletRequest;
>     import jakarta.servlet.http.HttpServletResponse;
>     
>     import java.io.IOException;
>     import java.io.PrintWriter;
>     import java.sql.Connection;
>     import java.sql.PreparedStatement;
>     import java.sql.ResultSet;
>     import java.sql.SQLException;
>     
>     public class DeptListServlet extends HttpServlet
>     {
>         @Override
>         protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
>         {
>             String contextPath = request.getContextPath();
>             Connection connection = null;
>             PreparedStatement statement = null;
>             ResultSet resultSet = null;
>             response.setContentType("text/html;charset=UTF-8");
>             PrintWriter writer = response.getWriter();
>             writer.println("<!DOCTYPE html>");
>             writer.println("<html>");
>             writer.println("    <head>");
>             writer.println("       <meta charset='utf-8'>");
>             writer.println("       <title>部门列表</title>");
>             writer.println("    </head>");
>             writer.println("    <body>");
>             writer.println("\t<script type=\"text/javascript\">\n" +
>                     "\t\tfunction del(dno){\n" +
>                     "\t\t\tvar ok = window.confirm(\"是否确认删除该数据\");\n" +
>                     "\t\t\tif(ok)\n" +
>                     "\t\t\t{\n" +
>                     "\t\t\t\twindow.location.href = \"" + contextPath + "/dept/delete?deptno=\"+dno\n" +
>                     "\t\t\t}\n" +
>                     "\t\t}\n" +
>                     "\t</script>");
>             writer.println("       <h1 align='center'>部门列表</h1>");
>             writer.println("       <hr>");
>             writer.println("       <table align='center' border='1px' width='50%'>");
>             writer.println("          <tr>");
>             writer.println("             <th>序号</th>");
>             writer.println("             <th>部门编号</th>");
>             writer.println("             <th>部门名称</th>");
>             writer.println("             <th>操作</th>");
>             writer.println("          </tr>");
>             try
>             {
>                 connection = DBUtil.getConnection();
>                 String sql = "select * from dept";
>                 statement = connection.prepareStatement(sql);
>                 resultSet = statement.executeQuery();
>                 int i = 0;
>                 while(resultSet.next())
>                 {
>                     String deptno = resultSet.getString("deptno");
>                     String dname = resultSet.getString("dname");
>                     String loc = resultSet.getString("loc");
>                     writer.println("          <tr>");
>                     writer.println("             <td>" + (++i) + "</td>");
>                     writer.println("             <td>" + (deptno) + "</td>");
>                     writer.println("             <td>" + (dname) + "</td>");
>                     writer.println("             <td>");
>                     writer.println("                <a href=\"javascript:void(0)\"  οnclick=\"del("+(deptno)+")\">删除</a>");
>                     writer.println("                <a href='edit.html'>修改</a>");
>                     writer.println("                <a href='" + (contextPath) + "/dept/detail?deptno=" + deptno +"'>详情</a>");
>                     writer.println("             </td>");
>                     writer.println("          </tr>");
>                 }
>             }
>             catch (SQLException e)
>             {
>                 throw new RuntimeException(e);
>             }
>             finally
>             {
>                 DBUtil.close(connection,statement,resultSet);
>             }
>             writer.println("       </table>");
>             writer.println("       <hr>");
>             writer.println("       <a href='add.html'>新增部门</a>");
>             writer.println("    </body>");
>             writer.println("</html>");
>         }
>     }

>     <?xml version="1.0" encoding="UTF-8"?>
>     <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
>              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>              xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
>              version="4.0">
>         <servlet>
>             <servlet-name>listDept</servlet-name>
>             <servlet-class>com.bjpowernode.oa.web.action.DeptListServlet</servlet-class>
>         </servlet>
>         <servlet-mapping>
>             <servlet-name>listDept</servlet-name>
>     
>             <url-pattern>/dept/list</url-pattern>
>         </servlet-mapping>
>         <servlet>
>             <servlet-name>detail</servlet-name>
>             <servlet-class>com.bjpowernode.oa.web.action.DetailServlet</servlet-class>
>         </servlet>
>         <servlet-mapping>
>             <servlet-name>detail</servlet-name>
>             <url-pattern>/dept/detail</url-pattern>
>         </servlet-mapping>
>         <servlet>
>             <servlet-name>delete</servlet-name>
>             <servlet-class>com.bjpowernode.oa.web.action.DeleteServlet</servlet-class>
>         </servlet>
>         <servlet-mapping>
>             <servlet-name>delete</servlet-name>
>             <url-pattern>/dept/delete</url-pattern>
>         </servlet-mapping>
>     </web-app>
> 
>     <?xml version="1.0" encoding="UTF-8"?>
>     <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
>              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>              xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
>              version="4.0">
>         <servlet>
>             <servlet-name>listDept</servlet-name>
>             <servlet-class>com.bjpowernode.oa.web.action.DeptListServlet</servlet-class>
>         </servlet>
>         <servlet-mapping>
>             <servlet-name>listDept</servlet-name>
>     
>             <url-pattern>/dept/list</url-pattern>
>         </servlet-mapping>
>         <servlet>
>             <servlet-name>detail</servlet-name>
>             <servlet-class>com.bjpowernode.oa.web.action.DetailServlet</servlet-class>
>         </servlet>
>         <servlet-mapping>
>             <servlet-name>detail</servlet-name>
>             <url-pattern>/dept/detail</url-pattern>
>         </servlet-mapping>
>         <servlet>
>             <servlet-name>delete</servlet-name>
>             <servlet-class>com.bjpowernode.oa.web.action.DeleteServlet</servlet-class>
>         </servlet>
>         <servlet-mapping>
>             <servlet-name>delete</servlet-name>
>             <url-pattern>/dept/delete</url-pattern>
>         </servlet-mapping>
>     </web-app>

>     <!DOCTYPE html>
>     <html lang="en">
>     <head>
>         <meta charset="UTF-8">
>         <title>Error</title>
>     </head>
>     <body>
>         <h1>删除失败,<a href="javascript:void(0)" onclick="window.history.back()">返回</a></h1>
>     </body>
>     </html>
> 
>     <!DOCTYPE html>
>     <html lang="en">
>     <head>
>         <meta charset="UTF-8">
>         <title>Error</title>
>     </head>
>     <body>
>         <h1>删除失败,<a href="javascript:void(0)" οnclick="window.history.back()">返回</a></h1>
>     </body>
>     </html>