jsp的表单提交给servlet，如何使servlet处理完数据后再跳转回jsp

2011-05-16 11:30:07 728 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

clang-tidy 使用指南 clang-tidy 需要一个编译数据库来了解如何编译你的代码。编译数据库通常是一个名为 compile_commands.json 的文件。在这个示例中，clang-tidy 会对 test.cpp 文件进行分析，并报告任何潜在的问题。例如，它可能会警告 test 函数中的未使用变量 x。clang-tidy 是一个用于 C++ 代码的静态分析工具，可以帮助你发现代码中的潜在问题和改进点。这将在 build 目录中生成一个 compile_commands.json 文件。阅读详情

list.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.util.*"%>
<%@ page import="com.avceit.bean.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

<%
DataBaseStudent dbs = new DataBaseStudent();
int i = 0 ;
List all = null ;
all = dbs.select();
Iterator iter = all.iterator() ;

while(iter.hasNext())
{
Student stu = (Student)iter.next() ;
i++ ;
// 进行循环打印，打印出所有的内容，以表格形式
// 从数据库中取出内容

%>
<form name="form1" method="post" action="servlet/StuServlet">
<table border="1">
<% int id =stu.getId();
String age = stu.getAge();
String username =stu.getUsername();%>
<tr>
<td width="98"><input type="text" name="id" value=<%=id%>></td>
<td width="146"><%=username%></td>
<td width="110"><%=age %></td>
<td width="117"><input type="hidden" name="sta" value="del">
<input type="submit" name="Submit" value="删除"></td>
</tr>
</table>
</form>
<%}
%>

</body>
</html>

Servlet：
package com.avceit.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.avceit.bean.DataBaseStudent;
import com.avceit.bean.Student;

public class StuServlet extends HttpServlet {

public StuServlet() {
super();
}

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

this.doPost(request, response);
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("GBK");
response.setContentType("text/html");
response.setCharacterEncoding("GBK");
String sta = request.getParameter("sta");
DataBaseStudent dbs = new DataBaseStudent();
Student stu = new Student();
PrintWriter out = response.getWriter();
if (sta.equals("add")) {
String username = request.getParameter("username");
String age = request.getParameter("age");
stu.setUsername(username);
stu.setAge(age);
dbs.add(stu);
} else if (sta.equals("del")) {
int id = Integer.parseInt(request.getParameter("id"));
dbs.delete(id);
dbs.select();

}
response.sendRedirect("/list.jsp");
}
}

如何让Servlet处理完jsp 的删除数据处理后，再次跳转回jsp页面，为下一次删除数据做准备？谢谢。

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