【JSP基础】Dreamwe记录集简单用法，简单的jsp直连数据库

准备：Dreamweaver8，tomcate，

在tomcte的webapps目录下建立一个文件夹，以你将来站点的名称来命名该文件夹。并在该文件夹下命名一个“WEB-INT”文件夹，并在该文件夹下创建“lib”文件夹，

在“lib”文件夹下导入与mysql连接所需的jre包。说起来繁琐，其实就是建立几个文件夹而已。

注意下面文件路径：

准备工作做完之后，就打开所需要的工具Dreamweaver，当然在这之前，你必须把tomcate启动。

在Dreamweaver菜单栏里，点击创建站点。（这里笔者所用为Dreamweaver8）

站点的名称任意，只是起到标示作用而已。站点HTTP最好是你将来预览该站点的路径，当然也可以不填。

2.技术我们用一个简单的JSP技术作为示范，之后就是定义测试服务器了。一般都是选择第二个。但是因人而异。

文件储存位置就是刚刚我们一开始所建立的目录。

3.测试服务器的选择，如果你有ftp账号和密码，也可以直接建站在虚拟目录下，这里演示在本地测试服务器。

4.最后测试下URl就行了，注意这里路径一定要填写正确。

这样就完成了对站点的建立。之后我们需要在站点目录下建立一个页面。

回顾一下，这里我们要学习登录页面和简单的增删改查。所以数据库要建立相应的表单，这就不表了，若不明白如何建立表单，我之前写的JAVA基础篇里面有关于

mysql的建表。

这里我建了三个表，但是由于时间有限，我只讲两个表就行了，另一个同理，都是关于增删改查地简单应用。

这里登录所用地表为 t_admin,赛事信息的表为 t_informaton，t_player为选手的信息表，这里不表。

sql表建立完成之后，我问先建立一个index.jsp页面。

大家原谅，这里不再讲述关于jsp设计方面的东西了，这样这篇文章就太冗长，这里只是介绍一下Dreamweaver的记录集用法。因为记录集是一个强大但是

现在很少人去用的东西。虽然现在有很多技术取代了这个。但是了解一下还是很不错的。最后我会把代码，粘下来。

右侧栏目，点击“应用程序”——“数据库”——加号。

这里是一个与mysql连接的驱动程序，也是我们一开始导的jre。需要我们填写的就是连接名，URl。URL中间不填写默认就是//localhost:8080/

所以我们在最后面写上我们的数据库名即可。

插入记录集：应用程序——服务器行为——加号——用户身份验证——登录

如果一开始没有创建记录集会先创建记录集，之后再是登录，这里没什么需要注意的，表格选到我们的的t_admin即可。

登录用户这里唯一注意的就是，用户名字段和密码字段。因为我们t_admin有三个列，id,user,password

我们登录只需要用id , password即可，所以登录框与数据库之间一一对应，否则就会出现错误。

这样，登录页面就完成了，下面是登录页面的代码。由于刚刚接触jsp，页面并不是很规范，请见谅;

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="Connections/ACM.jsp" %>
<%
String Recordset6__MMColParam = "1";
if (request.getParameter("id") !=null) {Recordset6__MMColParam = (String)request.getParameter("id");}
%>
<%
Driver DriverRecordset6 = (Driver)Class.forName(MM_ACM_DRIVER).newInstance();
Connection ConnRecordset6 = DriverManager.getConnection(MM_ACM_STRING,MM_ACM_USERNAME,MM_ACM_PASSWORD);
PreparedStatement StatementRecordset6 = ConnRecordset6.prepareStatement("SELECT * FROM db_Manager.t_admin WHERE id = " + Recordset6__MMColParam + "");
ResultSet Recordset6 = StatementRecordset6.executeQuery();
boolean Recordset6_isEmpty = !Recordset6.next();
boolean Recordset6_hasData = !Recordset6_isEmpty;
Object Recordset6_data;
int Recordset6_numRows = 0;
%>
<%
// *** Validate request to log in to this site.
String MM_LoginAction = 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 + "<";else if (queryString.charAt(i) == '>') tempStr = tempStr + ">";else if (queryString.charAt(i) == '"') tempStr = tempStr +  """;else tempStr = tempStr + queryString.charAt(i);}MM_LoginAction += "?" + tempStr;
}
String MM_valUsername=request.getParameter("user");
if (MM_valUsername != null) {String MM_fldUserAuthorization="";String MM_redirectLoginSuccess="findview.jsp";String MM_redirectLoginFailed="logfalse.jsp";String MM_redirectLogin=MM_redirectLoginFailed;Driver MM_driverUser = (Driver)Class.forName(MM_ACM_DRIVER).newInstance();Connection MM_connUser = DriverManager.getConnection(MM_ACM_STRING,MM_ACM_USERNAME,MM_ACM_PASSWORD);String MM_pSQL = "SELECT user, password";if (!MM_fldUserAuthorization.equals("")) MM_pSQL += "," + MM_fldUserAuthorization;MM_pSQL += " FROM db_Manager.t_admin WHERE user=\'" + MM_valUsername.replace('\'', ' ') + "\' AND password=\'" + request.getParameter("pwd").toString().replace('\'', ' ') + "\'";PreparedStatement MM_statementUser = MM_connUser.prepareStatement(MM_pSQL);ResultSet MM_rsUser = MM_statementUser.executeQuery();boolean MM_rsUser_isNotEmpty = MM_rsUser.next();if (MM_rsUser_isNotEmpty) {// username and password match - this is a valid usersession.putValue("MM_Username", MM_valUsername);if (!MM_fldUserAuthorization.equals("")) {session.putValue("MM_UserAuthorization", MM_rsUser.getString(MM_fldUserAuthorization).trim());} else {session.putValue("MM_UserAuthorization", "");}if ((request.getParameter("accessdenied") != null) && false) {MM_redirectLoginSuccess = request.getParameter("accessdenied");}MM_redirectLogin=MM_redirectLoginSuccess;}MM_rsUser.close();MM_connUser.close();response.sendRedirect(response.encodeRedirectURL(MM_redirectLogin));return;
}
%>
<!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=utf-8" />
<title>管理员登录</title>
<style>
h1 { background-color:#CC0099;width:200px;left:400px}
#shubiao{background-image:url(imager/u=2326365784,3114316492&fm=23&gp=0.jpg); width:93px; height:78px; left:9px; position:absolute; top: 102px;}
#shubiao:hover{background-image:url(imager/ac75323d6b6de243-959a0261b4ff28a1-2d23ac9558b16dfc8873a05f17941cb6.jpg);}
#main{border:5px solid #3300FF;background-color: #99FFCC;position: absolute; width:400px; height:250px; left:258px;top:97px;}
</style>
</head>
<body>
<div id = "main">
<h align="center"> </h>
<h1 align="center">管理员登录</h1>
<form id="form1" name="form1" method="POST" action="<%=MM_LoginAction%>"><div id ="shubiao"></div><p align="center">    <strong>用户名</strong><input name="user" type="text" /></p><p align="center">     <strong>密  码 </strong><input name="pwd" type="password" /></p><label><div align="center">记住密码      //这里是关于记住密码的功能，文章并没有叙述，所以这里酌情增删。<input <%=(((((Recordset6_data = Recordset6.getObject("password"))==null || Recordset6.wasNull())?"":Recordset6_data).toString().equals(("1").toString()))?"checked=\"checked\"":"")%> type="checkbox" name="checkbox" value="checkbox" /><label></label></div></label><div align="center"><input name="submit" type="submit"value ="登录" /></div>
</form>
</div>
</body>
</html>
<%
Recordset6.close();
StatementRecordset6.close();
ConnRecordset6.close();
%>

登录页面告一段落。

下面是一个比赛信息的增删改查。

、首先是一个view页面：（请忽视渣布局....）

在表格上方写了一个链接，是添加比赛信息（增），操作1（删），操作2（改），本页面就是查了。

先说一下这个view页面的创建吧。

同样，先插入一个记录集：选定t_information表格。这里不能选择以id筛选，否则不会有任何显示。

动态表格：记录集名称要与上面记录集名称一致，由于项目我已经做好，不能再添加，所以另建一个页面作说明，

难免会有一些初入，请各位注意说明。

动态表格添加之后，就是多添加两个，写删除和修改两个操作。

可是这两个操作如何超链接呢？

<td><div align="center"><a href="del_information.jsp?id=<%=(((Recordset4_data = Recordset4.getObject("id"))==null || Recordset4.wasNull())?"":Recordset4_data)%>">取消比赛</a></div></td><td><div align="center"><a href="update_information.jsp?id=<%=(((Recordset4_data = Recordset4.getObject("id"))==null || Recordset4.wasNull())?"":Recordset4_data)%>">修改比赛</a></div></td>

这里并不能直接复制，这里id是与你自己建立动态表格id栏目里的值一致即可。

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="Connections/ACM.jsp" %>
<%
request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8");
Driver DriverRecordset4 = (Driver)Class.forName(MM_ACM_DRIVER).newInstance();
Connection ConnRecordset4 = DriverManager.getConnection(MM_ACM_STRING,MM_ACM_USERNAME,MM_ACM_PASSWORD);
PreparedStatement StatementRecordset4 = ConnRecordset4.prepareStatement("SELECT * FROM db_Manager.t_information");
ResultSet Recordset4 = StatementRecordset4.executeQuery();
boolean Recordset4_isEmpty = !Recordset4.next();
boolean Recordset4_hasData = !Recordset4_isEmpty;
Object Recordset4_data;
int Recordset4_numRows = 0;
%>
<%
int Repeat1__numRows = 10;
int Repeat1__index = 0;
Recordset4_numRows += Repeat1__numRows;
%>
<%
int Repeat2__numRows = 10;
int Repeat2__index = 0;
Recordset4_numRows += Repeat2__numRows;
%>
<!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=utf-8" />
<title>赛事信息</title>
<style type="text/css">
<!--
-->
a.one{color:#000099;text-decoration: underline blink;font-size: medium;
}
.STYLE4 {font-size: xx-large}
.STYLE5 {color: #F0F0F0}
</style>
</head><body>
<div style="background-color:#FFCC99;position:relative;top:auto">
<div style="background-color:#FFCC99;position:static;height:50px"><p class="STYLE4">网球比赛后台管理系统  </p>
</div>
<div style="background-color:#66FFFF;position:static; "><p> </p><p> </p><p> </p><p> </p><div align="center"><a href="add_game.jsp">添加比赛</a></div><table border="5" cellpadding="10" cellspacing="1" bgcolor="#FFCCFF"  ><tr><td  width="500"   ><div align="center">流水账号</div></td><td  width="2500" ><div align="center">比赛名称</div></td><td width="1500"  ><div align="center">比赛开始时间</div></td><td   width="2000"  ><div align="center" >比赛地点</div></td><td  width="1500" ><div align="center">允许最大人数</div></td><td   width="1500" ><div align="center">报名截止时间</div></td><td   width="1500" ><div align="center">当前参赛人数</div></td><td  width="1500"  >操作1</td><td   width="1500"  >操作2</td></tr><% while ((Recordset4_hasData)&&(Repeat1__numRows-- != 0)) { %><tr><td height="56"><div align="center"><%=(((Recordset4_data = Recordset4.getObject("id"))==null || Recordset4.wasNull())?"":Recordset4_data)%><table border="1" cellpadding="10" cellspacing="10"><tr><td>id</td><td>name</td><td>start_time</td><td>place</td><td>lage_people</td><td>finally_time</td><td>now_people</td></tr><% while ((Recordset4_hasData)&&(Repeat2__numRows-- != 0)) { %><tr><td><%=(((Recordset4_data = Recordset4.getObject("id"))==null || Recordset4.wasNull())?"":Recordset4_data)%></td><td><%=(((Recordset4_data = Recordset4.getObject("name"))==null || Recordset4.wasNull())?"":Recordset4_data)%></td><td><%=(((Recordset4_data = Recordset4.getObject("start_time"))==null || Recordset4.wasNull())?"":Recordset4_data)%></td><td><%=(((Recordset4_data = Recordset4.getObject("place"))==null || Recordset4.wasNull())?"":Recordset4_data)%></td><td><%=(((Recordset4_data = Recordset4.getObject("lage_people"))==null || Recordset4.wasNull())?"":Recordset4_data)%></td><td><%=(((Recordset4_data = Recordset4.getObject("finally_time"))==null || Recordset4.wasNull())?"":Recordset4_data)%></td><td><%=(((Recordset4_data = Recordset4.getObject("now_people"))==null || Recordset4.wasNull())?"":Recordset4_data)%></td></tr><%Repeat2__index++;Recordset4_hasData = Recordset4.next();
}
%></table></div></td><td><div align="center"><%=(((Recordset4_data = Recordset4.getObject("name"))==null || Recordset4.wasNull())?"":Recordset4_data)%></div></td><td><div align="center"><%=(((Recordset4_data = Recordset4.getObject("start_time"))==null || Recordset4.wasNull())?"":Recordset4_data)%></div></td><td><div align="center"><%=(((Recordset4_data = Recordset4.getObject("place"))==null || Recordset4.wasNull())?"":Recordset4_data)%></div></td><td><div align="center"><%=(((Recordset4_data = Recordset4.getObject("lage_people"))==null || Recordset4.wasNull())?"":Recordset4_data)%></div></td><td><div align="center"><%=(((Recordset4_data = Recordset4.getObject("finally_time"))==null || Recordset4.wasNull())?"":Recordset4_data)%></div></td><td><div align="center"><%=(((Recordset4_data = Recordset4.getObject("now_people"))==null || Recordset4.wasNull())?"":Recordset4_data)%></div></td><td><div align="center"><a href="del_information.jsp?id=<%=(((Recordset4_data = Recordset4.getObject("id"))==null || Recordset4.wasNull())?"":Recordset4_data)%>">取消比赛</a></div></td><td><div align="center"><a href="update_information.jsp?id=<%=(((Recordset4_data = Recordset4.getObject("id"))==null || Recordset4.wasNull())?"":Recordset4_data)%>">修改比赛</a></div></td></tr><%Repeat1__index++;Recordset4_hasData = Recordset4.next();
}
%></table><p> </p><div align="right"><input name="" type="submit" onClick="window.location.href='findview.jsp'" value="返回主页" /></div><p> </p>
</div><div align="center"><hr /><p class="style4"> </p></div></div>
</body>
</html>
<%
Recordset4.close();
StatementRecordset4.close();
ConnRecordset4.close();
%>

做完这个之后，做一个增加页面：注意：前提是建立一个表单

这里就简化说明了，通过上文，相信对记录集的使用已经很清晰了。

直接选择插入记录集。

完成之后，就是对页面的设计了。

下面是代码：

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="Connections/ACM.jsp" %>
<%
// *** Edit Operations: declare variables// set the form action variable
request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8");
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 + "<";else if (queryString.charAt(i) == '>') tempStr = tempStr + ">";else if (queryString.charAt(i) == '"') tempStr = tempStr +  """;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;
%>
<%
// *** Insert Record: set variablesif (request.getParameter("MM_insert") != null && request.getParameter("MM_insert").toString().equals("form1")) {MM_editDriver     = MM_ACM_DRIVER;MM_editConnection = MM_ACM_STRING;MM_editUserName   = MM_ACM_USERNAME;MM_editPassword   = MM_ACM_PASSWORD;MM_editTable  = "db_Manager.t_information";MM_editRedirectUrl = "player_information.jsp";String MM_fieldsStr = "id|value|name|value|start_time|value|place|value|lage_people|value|finally_time|value|now_people|value";String MM_columnsStr = "id|none,none,NULL|name|',none,''|start_time|',none,NULL|place|',none,''|lage_people|none,none,NULL|finally_time|',none,NULL|now_people|none,none,NULL";// create the MM_fields and MM_columns arraysjava.util.StringTokenizer tokens = new java.util.StringTokenizer(MM_fieldsStr,"|");MM_fields = new String[tokens.countTokens()];for (int i=0; tokens.hasMoreTokens(); i++) MM_fields[i] = tokens.nextToken();tokens = new java.util.StringTokenizer(MM_columnsStr,"|");MM_columns = new String[tokens.countTokens()];for (int i=0; tokens.hasMoreTokens(); i++) MM_columns[i] = tokens.nextToken();// set the form valuesfor (int i=0; i+1 < MM_fields.length; i+=2) {MM_fields[i+1] = ((request.getParameter(MM_fields[i])!=null)?(String)request.getParameter(MM_fields[i]):"");}// append the query string to the redirect URLif (MM_editRedirectUrl.length() != 0 && request.getQueryString() != null) {MM_editRedirectUrl += ((MM_editRedirectUrl.indexOf('?') == -1)?"?":"&") + request.getQueryString();}
}
%>
<%
// *** Insert Record: construct a sql insert statement and execute itif (request.getParameter("MM_insert") != null) {// create the insert sql statementStringBuffer MM_tableValues = new StringBuffer(), MM_dbValues = new StringBuffer();for (int i=0; i+1 < MM_fields.length; i+=2) {String formVal = MM_fields[i+1];String elem;java.util.StringTokenizer tokens = new java.util.StringTokenizer(MM_columns[i+1],",");String delim    = ((elem = (String)tokens.nextToken()) != null && elem.compareTo("none")!=0)?elem:"";String altVal   = ((elem = (String)tokens.nextToken()) != null && elem.compareTo("none")!=0)?elem:"";String emptyVal = ((elem = (String)tokens.nextToken()) != null && elem.compareTo("none")!=0)?elem:"";if (formVal.length() == 0) {formVal = emptyVal;} else {if (altVal.length() != 0) {formVal = altVal;} else if (delim.compareTo("'") == 0) {  // escape quotesStringBuffer escQuotes = new StringBuffer(formVal);for (int j=0; j < escQuotes.length(); j++)if (escQuotes.charAt(j) == '\'') escQuotes.insert(j++,'\'');formVal = "'" + escQuotes + "'";} else {formVal = delim + formVal + delim;}}MM_tableValues.append((i!=0)?",":"").append(MM_columns[i]);MM_dbValues.append((i!=0)?",":"").append(formVal);}MM_editQuery = new StringBuffer("insert into " + MM_editTable);MM_editQuery.append(" (").append(MM_tableValues.toString()).append(") values (");MM_editQuery.append(MM_dbValues.toString()).append(")");if (!MM_abortEdit) {// finish the sql and execute itDriver 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 parametersif (MM_editRedirectUrl.length() != 0) {response.sendRedirect(response.encodeRedirectURL(MM_editRedirectUrl));return;}}
}
%>
<!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=utf-8" />
<title>添加比赛信息</title>
<style type="text/css">
<!--
-->
a.one{color:#000099;text-decoration: underline blink;font-size: medium;
}
.STYLE4 {font-size: xx-large}
.STYLE5 {color: #333333}</style>
</head><body>
<div style="background-color:#FFCC99;position:relative;height:650px;top:auto">
<div style="background-color:#FFCC99;position:static;height:50px"><p class="STYLE4">网球比赛后台管理系统  </p>
</div>
<div style="background-color:#66FFFF;position:static;height:500px; "><form method="post" action="<%=MM_editAction%>" name="form1"><p> </p><p> </p><p> </p><table align="center"><tr valign="baseline"><td nowrap align="right"><div align="center">比赛名称:</div></td><td><input type="text" name="name" value="" size="32"></td></tr><tr valign="baseline"><td nowrap align="right"><div align="center">比赛开始时间:</div></td><td><input type="text" name="start_time" value="" size="32"><span class="STYLE5">格式：YYY-MM-DD</span></td></tr><tr valign="baseline"><td nowrap align="right"><div align="center">地址:</div></td><td><input type="text" name="place" value="" size="32"></td></tr><tr valign="baseline"><td nowrap align="right"><div align="center">允许最大人数:</div></td><td><input type="text" name="lage_people" value="" size="32"></td></tr><tr valign="baseline"><td nowrap align="right"><div align="center">报名截止时间:</div></td><td><input type="text" name="finally_time" value="" size="32"><span class="STYLE5">格式：YYY-MM-DD</span></td></tr><tr valign="baseline"><td nowrap align="right"><div align="center">当期人数:</div></td><td><input type="text" name="now_people" value="" size="32"></td></tr><tr valign="baseline"><td nowrap align="right"> </td><td><input type="submit" value="确认添加"></td></tr></table><p>       </p><div align="center"><input name="" type="button" onClick="window.location.href='player_information.jsp'" value="返回" /><input type="hidden" name="MM_insert" value="form1"></div></form><p> </p>
</div><div align="center"></div>
</div>
</body>
</html>

下面是删除操作：

新建页面——选择应用程序：注意：前提是建立一个带有提交按钮的表单

同样的步骤，但这里有个注意的地方，唯一键列，选择id之后，如果你数据库对其设置的是int型，则要勾选数字。

若是verchat型，则不能勾选。

代码：

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="Connections/ACM.jsp" %>
<%
// *** Edit Operations: declare variables// set the form action variable
request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8");
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 + "<";else if (queryString.charAt(i) == '>') tempStr = tempStr + ">";else if (queryString.charAt(i) == '"') tempStr = tempStr +  """;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 itif (request.getParameter("MM_delete") != null &&request.getParameter("MM_delete").toString().equals("form1") &&request.getParameter("MM_recordId") != null) {MM_editDriver     = MM_ACM_DRIVER;MM_editConnection = MM_ACM_STRING;MM_editUserName   = MM_ACM_USERNAME;MM_editPassword   = MM_ACM_PASSWORD;MM_editTable = "db_Manager.t_information";MM_editColumn = "id";MM_recordId = "" + request.getParameter("MM_recordId") + "";MM_editRedirectUrl = "player_information.jsp";// append the query string to the redirect URLif (MM_editRedirectUrl.length() != 0 && request.getQueryString() != null) {MM_editRedirectUrl += ((MM_editRedirectUrl.indexOf('?') == -1)?"?":"&") + request.getQueryString();}
}
%>
<%
// *** Delete Record: construct a sql delete statement and execute itif (request.getParameter("MM_delete") != null &&request.getParameter("MM_recordId") != null) {// create the delete sql statementMM_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 itDriver 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 parametersif (MM_editRedirectUrl.length() != 0) {response.sendRedirect(response.encodeRedirectURL(MM_editRedirectUrl));return;}}
}
%>
<%
String Recordset5__MMColParam = "1";
if (request.getParameter("id") !=null) {Recordset5__MMColParam = (String)request.getParameter("id");}
%>
<%
Driver DriverRecordset5 = (Driver)Class.forName(MM_ACM_DRIVER).newInstance();
Connection ConnRecordset5 = DriverManager.getConnection(MM_ACM_STRING,MM_ACM_USERNAME,MM_ACM_PASSWORD);
PreparedStatement StatementRecordset5 = ConnRecordset5.prepareStatement("SELECT * FROM db_Manager.t_information WHERE id = " + Recordset5__MMColParam + "");
ResultSet Recordset5 = StatementRecordset5.executeQuery();
boolean Recordset5_isEmpty = !Recordset5.next();
boolean Recordset5_hasData = !Recordset5_isEmpty;
Object Recordset5_data;
int Recordset5_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=utf-8" />
<title>删除比赛信息</title>
<style type="text/css">
<!--
-->
a.one{color:#000099;text-decoration: underline blink;font-size: medium;
}
.STYLE4 {font-size: xx-large}
.STYLE5 {color: #3A413C}
.STYLE6 {color: #3300FF}
</style>
</head><body>
<div style="background-color:#FFCC99;position:relative;height:650px;top:auto">
<div style="background-color:#FFCC99;position:static;height:50px"><p class="STYLE4">网球比赛后台管理系统  </p>
</div>
<div style="background-color:#66FFFF;position:static;height:500px; "><form name="form1" action="<%=MM_editAction%>" method="POST"><div align="center"><p><input type="hidden" name="MM_delete" value="form1"><input type="hidden" name="MM_recordId" value="<%=(((Recordset5_data = Recordset5.getObject("id"))==null || Recordset5.wasNull())?"":Recordset5_data)%>"></p><p> </p><p> </p><p> </p><p>     再次确认是否删除该比赛所有信息？  <span class="STYLE5">一旦删除，将无法恢复。</span> </p><p> </p><p><input name="submit" type="submit" value="确认" /><input name="" type="button" onClick="window.location.href='player_information.jsp'" value="返回" />     </p></div></form>
</div><div align="center"></div><hr /></div>
</body>
</html>
<%
Recordset5.close();
StatementRecordset5.close();
ConnRecordset5.close();
%>

最终预览：

最后是修改页面了，同样语言注意的是，建立一个表单。

同样需要注意的是唯一键列。

预览：

代码:

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="Connections/ACM.jsp" %>
<%
// *** Edit Operations: declare variables// set the form action variable
request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8");
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 + "<";else if (queryString.charAt(i) == '>') tempStr = tempStr + ">";else if (queryString.charAt(i) == '"') tempStr = tempStr +  """;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;
%>
<%
// *** Update Record: set variablesif (request.getParameter("MM_update") != null &&request.getParameter("MM_update").toString().equals("form1") &&request.getParameter("MM_recordId") != null) {MM_editDriver     = MM_ACM_DRIVER;MM_editConnection = MM_ACM_STRING;MM_editUserName   = MM_ACM_USERNAME;MM_editPassword   = MM_ACM_PASSWORD;MM_editTable  = "db_Manager.t_information";MM_editColumn = "id";MM_recordId   = "" + request.getParameter("MM_recordId") + "";MM_editRedirectUrl = "player_information.jsp";String MM_fieldsStr = "name|value|start_time|value|place|value|lage_people|value|finally_time|value|now_people|value";String MM_columnsStr = "name|',none,''|start_time|',none,NULL|place|',none,''|lage_people|none,none,NULL|finally_time|',none,NULL|now_people|none,none,NULL";// create the MM_fields and MM_columns arraysjava.util.StringTokenizer tokens = new java.util.StringTokenizer(MM_fieldsStr,"|");MM_fields = new String[tokens.countTokens()];for (int i=0; tokens.hasMoreTokens(); i++) MM_fields[i] = tokens.nextToken();tokens = new java.util.StringTokenizer(MM_columnsStr,"|");MM_columns = new String[tokens.countTokens()];for (int i=0; tokens.hasMoreTokens(); i++) MM_columns[i] = tokens.nextToken();// set the form valuesfor (int i=0; i+1 < MM_fields.length; i+=2) {MM_fields[i+1] = ((request.getParameter(MM_fields[i])!=null)?(String)request.getParameter(MM_fields[i]):"");}// append the query string to the redirect URLif (MM_editRedirectUrl.length() != 0 && request.getQueryString() != null) {MM_editRedirectUrl += ((MM_editRedirectUrl.indexOf('?') == -1)?"?":"&") + request.getQueryString();}
}
%>
<%
// *** Update Record: construct a sql update statement and execute itif (request.getParameter("MM_update") != null &&request.getParameter("MM_recordId") != null) {// create the update sql statementMM_editQuery = new StringBuffer("update ").append(MM_editTable).append(" set ");for (int i=0; i+1 < MM_fields.length; i+=2) {String formVal = MM_fields[i+1];String elem;java.util.StringTokenizer tokens = new java.util.StringTokenizer(MM_columns[i+1],",");String delim    = ((elem = (String)tokens.nextToken()) != null && elem.compareTo("none")!=0)?elem:"";String altVal   = ((elem = (String)tokens.nextToken()) != null && elem.compareTo("none")!=0)?elem:"";String emptyVal = ((elem = (String)tokens.nextToken()) != null && elem.compareTo("none")!=0)?elem:"";if (formVal.length() == 0) {formVal = emptyVal;} else {if (altVal.length() != 0) {formVal = altVal;} else if (delim.compareTo("'") == 0) {  // escape quotesStringBuffer escQuotes = new StringBuffer(formVal);for (int j=0; j < escQuotes.length(); j++)if (escQuotes.charAt(j) == '\'') escQuotes.insert(j++,'\'');formVal = "'" + escQuotes + "'";} else {formVal = delim + formVal + delim;}}MM_editQuery.append((i!=0)?",":"").append(MM_columns[i]).append(" = ").append(formVal);}MM_editQuery.append(" where ").append(MM_editColumn).append(" = ").append(MM_recordId);if (!MM_abortEdit) {// finish the sql and execute itDriver 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 parametersif (MM_editRedirectUrl.length() != 0) {response.sendRedirect(response.encodeRedirectURL(MM_editRedirectUrl));return;}}
}
%>
<%
String Recordset6__MMColParam = "1";
if (request.getParameter("id") !=null) {Recordset6__MMColParam = (String)request.getParameter("id");}
%>
<%
Driver DriverRecordset6 = (Driver)Class.forName(MM_ACM_DRIVER).newInstance();
Connection ConnRecordset6 = DriverManager.getConnection(MM_ACM_STRING,MM_ACM_USERNAME,MM_ACM_PASSWORD);
PreparedStatement StatementRecordset6 = ConnRecordset6.prepareStatement("SELECT * FROM db_Manager.t_information WHERE id = " + Recordset6__MMColParam + "");
ResultSet Recordset6 = StatementRecordset6.executeQuery();
boolean Recordset6_isEmpty = !Recordset6.next();
boolean Recordset6_hasData = !Recordset6_isEmpty;
Object Recordset6_data;
int Recordset6_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=utf-8" />
<title>修改比赛信息</title>
<style type="text/css">
<!--
-->
a.one{color:#000099;text-decoration: underline blink;font-size: medium;
}
.STYLE4 {font-size: xx-large}
.STYLE5 {color: #333333}
.STYLE6 {color: #0000FF}
</style>
</head><body>
<div style="background-color:#FFCC99;position:relative;height:650px;top:auto">
<div style="background-color:#FFCC99;position:static;height:50px"><p class="STYLE4">网球比赛后台管理系统  </p>
</div>
<div style="background-color:#66FFFF;position:static;height:500px; "><form method="POST" action="<%=MM_editAction%>" name="form1"><p> </p><p> </p><p> </p><table align="center"><tr valign="baseline"><td nowrap align="right">比赛名称:</td><td><input type="text" name="name" value="<%=(((Recordset6_data = Recordset6.getObject("name"))==null || Recordset6.wasNull())?"":Recordset6_data)%>" size="32"></td></tr><tr valign="baseline"><td nowrap align="right">比赛时间</td><td><input type="text" name="start_time" value="<%=(((Recordset6_data = Recordset6.getObject("start_time"))==null || Recordset6.wasNull())?"":Recordset6_data)%>" size="32"><span class="STYLE5">格式：YYY-MM-DD</span> </td></tr><tr valign="baseline"><td nowrap align="right">地址</td><td><input type="text" name="place" value="<%=(((Recordset6_data = Recordset6.getObject("place"))==null || Recordset6.wasNull())?"":Recordset6_data)%>" size="32"></td></tr><tr valign="baseline"><td nowrap align="right">允许最大人数</td><td><input type="text" name="lage_people" value="<%=(((Recordset6_data = Recordset6.getObject("lage_people"))==null || Recordset6.wasNull())?"":Recordset6_data)%>" size="32"></td></tr><tr valign="baseline"><td nowrap align="right">报名截止时间</td><td><input type="text" name="finally_time" value="<%=(((Recordset6_data = Recordset6.getObject("finally_time"))==null || Recordset6.wasNull())?"":Recordset6_data)%>" size="32"><span class="STYLE5">格式：YYY-MM-DD</span> </td></tr><tr valign="baseline"><td nowrap align="right">当前人数</td><td><input type="text" name="now_people" value="<%=(((Recordset6_data = Recordset6.getObject("now_people"))==null || Recordset6.wasNull())?"":Recordset6_data)%>" size="32"></td></tr><tr valign="baseline"><td nowrap align="right"> </td><td>        <input type="submit" value="确认"><input name="" type="button" onClick="window.location.href='player_information.jsp'" value="返回" />       </td></tr></table><input type="hidden" name="MM_update" value="form1"><input type="hidden" name="MM_recordId" value="<%=(((Recordset6_data = Recordset6.getObject("id"))==null || Recordset6.wasNull())?"":Recordset6_data)%>"></p></form><p> </p>
</div><div align="center"></div><hr /></div>
</body>
</html>
<%
Recordset6.close();
StatementRecordset6.close();
ConnRecordset6.close();
%>

这样就完成了今天的工程。谢谢

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