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我试图在提交时在同一个数据库中插入多行（每行都有很多字段），但无法这样做。我成功地能够插入单行，但是当它出现多行时，我卡住了。在eclipse中使用servlet jsp在同一数据库表中插入多行
这是jsp页面，您可以通过输入来动态添加任意行。没有单独的提交按钮为每个行而不是单个提交按钮来插入所有行。
1.>projmgrsuccessful.jsp
<form name="allocate-project-task" action="AddProjectTaskDAO" method="get" enctype="multipart/form-data">
<h4>Another popup</h4>
<input type="hidden" name="proj_emp_comt" value="">
<input type="hidden" name="pid" value="<c:out value="${pid}" />">
<label>Enter the no of employee involved in project</label>
<input type="text" id="textbox1" />
<input type="button" value="Add" id="add" />
<table border="1" id="pt-tabledata">
</table>
<center><input type="submit" name="alloc_time" value="Allocate"><a href="#" id="closea">Close</a></center>
</form>
<script>
$("#add").click(function() {
$('#pt-tabledata').append('<tr><td>Username</td><td>Work description</td> <td>Allocate time</td><td>Allocate work and time</td></tr>');
for (var i = 0; i < $("#textbox1").val(); i++) {
$newdiv2 = $('<tr id="pt-ip-row" style="display:block;"><td><select name="uname"><c:forEach items="${ual}" var="u"><option value="<c:out value="${u.uname}"></c:out>"><c:out value="${u.uname}"></c:out></option> </c:forEach> </select></td><td><textarea rows="5" cols="15" name="pdesc_emp"></textarea></td><td><input type="text" name="pestd_time_alloc" /></td><td></td><td><a href="#" id="close-pt-row" onclick="return hide();">Close</a></td> </tr>').after("#add");
$('#pt-tabledata').append($newdiv2);
}
});
</script>
这是Java代码片断在哪里处理等连接到数据库并将其插入到数据库表中的数据。
2>AddProjectTaskDAO.java
package com.pms.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.Statement;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class AddProjectTaskDAO
*/
@WebServlet("/AddProjectTaskDAO")
public class AddProjectTaskDAO extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public AddProjectTaskDAO() {
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
response.setContentType("text/html");
PrintWriter pw = response.getWriter();
Connection conn=null;
String url="jdbc:mysql://localhost:3306/";
String dbName="projectmanagement";
String driver="com.mysql.jdbc.Driver";
String dbUsername="root";
String dbPassword="root";
try{
String Projid=" ";
String Projuname=" ";
String Projdesc_emp=" ";
String Projestd_time_alloc=" ";
String Projtask_emp_comment=" ";
String Pid[] = request.getParameterValues("pid");
String Uname[] = request.getParameterValues("uname");
String Pdesc_emp[] = request.getParameterValues("pdesc_emp");
String Pestd_time_alloc[] = request.getParameterValues("pestd_time_alloc");
String Projtask_emp_cmnt[] = request.getParameterValues("ptask_emp_cmnt");
//String Utype = request.getParameter("utype");
for(int i=0; i<100; i++){
Projid=Pid[i]+" "+ 1;
Projuname=Uname[i]+" "+ 1;
Projdesc_emp=Pdesc_emp[i]+" "+ 1;
Projestd_time_alloc=Pestd_time_alloc[i]+" "+ 1;
Projtask_emp_comment=Projtask_emp_cmnt[i]+" "+ 1;
}
Class.forName(driver);
conn = DriverManager.getConnection(url+dbName,dbUsername, dbPassword);
Statement st=conn.createStatement();
int i = st.executeUpdate("insert into projtaskallocate (pid,uname,ptdesc_emp,ptestd_time_alloc,ptask_emp_cmnt) values ('" +Projid+ "','" +Projuname+"','" +Projdesc_emp+ "','" +Projestd_time_alloc+ "','" +Projtask_emp_comment+ "')");
String msg=" ";
if(i!=0){
UserPMDAO dd = new UserPMDAO();
request.setAttribute("ual", dd.getUsers());
ProjectDAO pp = new ProjectDAO();
request.setAttribute("pal", pp.getProjects());
String nextJSP = "/projmgrsuccessful.jsp";
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP);
dispatcher.forward(request,response);
}
else
{
msg="Failed to Add Project";
pw.print("<font size='6' color=blue>" + msg + "</font>");
}
pw.close();
//pst.close();
st.close();
conn.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
这里的问题是，当我点击提交按钮仅第一行插入，但我的要求是插入的所有行。
请帮助，如果我错了，请指导我。
SAN krish我加了这些声明，但它无法正常工作。 – Atiq
san krish我得到NullPointer异常错误。 – Atiq
我得到了我收到NullPointerException的原因，因为request.getParameterValues（）无法获取值。 这也可能是因为我有动态创建的文本框。 请帮我了解如何从动态创建的文本框中获取文本框的值。 – Atiq