📄 delnews.jsp

📁 一个信息发布管理页面,可删除添加修改......用JSP+ACCESS开发
💻 JSP
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<%@ page contentType="text/html; charset=GB2312" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="Connections/ch8.jsp" %>
<%
// *** Edit Operations: declare variables

// set the form action variable
String MM_editAction = request.getRequestURI();
if (request.getQueryString() != null && request.getQueryString().length() > 0) {
  String queryString = request.getQueryString();
  String tempStr = "";
  for (int i=0; i < queryString.length(); i++) {
    if (queryString.charAt(i) == '<') tempStr = tempStr + "&lt;";
    else if (queryString.charAt(i) == '>') tempStr = tempStr + "&gt;";
    else if (queryString.charAt(i) == '"') tempStr = tempStr +  "&quot;";
    else tempStr = tempStr + queryString.charAt(i);
  }
  MM_editAction += "?" + tempStr;
}

// connection information
String MM_editDriver = null, MM_editConnection = null, MM_editUserName = null, MM_editPassword = null;

// redirect information
String MM_editRedirectUrl = null;

// query string to execute
StringBuffer MM_editQuery = null;

// boolean to abort record edit
boolean MM_abortEdit = false;

// table information
String MM_editTable = null, MM_editColumn = null, MM_recordId = null;

// form field information
String[] MM_fields = null, MM_columns = null;
%>
<%
// *** Delete Record: construct a sql delete statement and execute it

if (request.getParameter("MM_delete") != null &&
    request.getParameter("MM_delete").toString().equals("form1") &&
    request.getParameter("MM_recordId") != null) {

  MM_editDriver     = MM_ch8_DRIVER;
  MM_editConnection = MM_ch8_STRING;
  MM_editUserName   = MM_ch8_USERNAME;
  MM_editPassword   = MM_ch8_PASSWORD;
  MM_editTable = "News";
  MM_editColumn = "ID";
  MM_recordId = "" + request.getParameter("MM_recordId") + "";
  MM_editRedirectUrl = "adminnews.jsp";

  // append the query string to the redirect URL
  if (MM_editRedirectUrl.length() != 0 && request.getQueryString() != null) {
    MM_editRedirectUrl += ((MM_editRedirectUrl.indexOf('?') == -1)?"?":"&") + request.getQueryString();
  }
}
%>
<%
// *** Delete Record: construct a sql delete statement and execute it

if (request.getParameter("MM_delete") != null &&
    request.getParameter("MM_recordId") != null) {

  // create the delete sql statement
  MM_editQuery = new StringBuffer("delete from ").append(MM_editTable);
  MM_editQuery.append(" where ").append(MM_editColumn).append(" = ").append(MM_recordId);
  
  if (!MM_abortEdit) {
    // finish the sql and execute it
    Driver MM_driver = (Driver)Class.forName(MM_editDriver).newInstance();
    Connection MM_connection = DriverManager.getConnection(MM_editConnection,MM_editUserName,MM_editPassword);
    PreparedStatement MM_editStatement = MM_connection.prepareStatement(MM_editQuery.toString());
    MM_editStatement.executeUpdate();
    MM_connection.close();

    // redirect with URL parameters
    if (MM_editRedirectUrl.length() != 0) {
      response.sendRedirect(response.encodeRedirectURL(MM_editRedirectUrl));
      return;
    }
  }
}
%>
<%
String Recordset1__MMColParam = "1";
if (request.getParameter("ID") !=null) {Recordset1__MMColParam = (String)request.getParameter("ID");}
%>
<%
Driver DriverRecordset1 = (Driver)Class.forName(MM_ch8_DRIVER).newInstance();
Connection ConnRecordset1 = DriverManager.getConnection(MM_ch8_STRING,MM_ch8_USERNAME,MM_ch8_PASSWORD);
PreparedStatement StatementRecordset1 = ConnRecordset1.prepareStatement("SELECT * FROM News WHERE ID = " + Recordset1__MMColParam + "");
ResultSet Recordset1 = StatementRecordset1.executeQuery();
boolean Recordset1_isEmpty = !Recordset1.next();
boolean Recordset1_hasData = !Recordset1_isEmpty;
Object Recordset1_data;
int Recordset1_numRows = 0;
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
<title>删除消息发布</title>
</head>

<body>
<p align="center"><img src="../ch8/images/deltitle.jpg" width="645" height="121" /></p>
<p align="center">确定删除以下数据:</p>
<table width="393" border="0" align="center">
  <tr bgcolor="#FFFFCC">
    <td width="164">发布日期</td>
    <td width="219"><%=(((Recordset1_data = Recordset1.getObject("newsdate"))==null || Recordset1.wasNull())?"":Recordset1_data)%></td>
  </tr>
  <tr bgcolor="#CCCC00">
    <td>发布主题</td>
    <td><%=(((Recordset1_data = Recordset1.getObject("newstitle"))==null || Recordset1.wasNull())?"":Recordset1_data)%></td>
  </tr>
  <tr bgcolor="#FFFFCC">
    <td>发布内容</td>
    <td><%=(((Recordset1_data = Recordset1.getObject("newscontents"))==null || Recordset1.wasNull())?"":Recordset1_data)%></td>
  </tr>
</table>
<form id="form1" name="form1" method="POST" action="<%=MM_editAction%>">
  
  <div align="center">
    <input type="submit" name="Submit" value="提交" />
  </div>

  <input type="hidden" name="MM_delete" value="form1">
  <input type="hidden" name="MM_recordId" value="<%=(((Recordset1_data = Recordset1.getObject("ID"))==null || Recordset1.wasNull())?"":Recordset1_data)%>">
</form>
<p align="center">&nbsp;</p>
</body>
</html>
<%
Recordset1.close();
StatementRecordset1.close();
ConnRecordset1.close();
%>
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