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用户留言java代码 java留言板功能齐全源码( 三 )

IT技术String


out.println("HR width="600" size="1"");
}while(myrs.next());}
catch(SQLException e){
out.println("error found");
}
}
else{
out.println("还没有留言！");
}
//结束
out.println("FORM name="form1" method="post" action="guestbookServlet"");
out.println("TABLE width="600" border="0" cellspacing="0" cellpadding="4" align="CENTER" class="mytext"");
out.println("TRTD width="80"姓名:/TDTDINPUT type="text" name="username"*/TD/TR");
out.println("TRTDEmail:/TDTDINPUT type="text" name="email"*/TD/TR");
out.println("TRTD留言：/TDTDTEXTAREA name="ucontent" cols="65" rows="4"/TEXTAREA/TD/TR");
out.println("/TABLE");
out.println("TABLE width="400" border="0" cellspacing="0" cellpadding="6" align="CENTER" class="mytext"");
out.println("TRTD height="15" width="200" /TDTD /TD/TR");
out.println("TRTDDIV align="RIGHT"INPUT type="button" name="Button" value="https://www.04ip.com/post/提 交" style="cursor:hand" onclick="javascript:check()"/DIV/TD");
out.println("TDINPUT type="reset" name="Submit2" value="https://www.04ip.com/post/重 置"/TD/TR");
out.println("/TABLE");
out.println("/FORM");
out.println("TABLE width="400" border="0" cellspacing="0" cellpadding="4" align="CENTER" class="mytext"");
out.println("TRTD width="15" /TD/TR");
out.println("TRTDDIV align="LEFT"/DIV/TD/TR");
out.println("TRTD /TD/TR");
out.println("/TABLE");
out.println("/BODY");
out.println("/HTML");
out.println("SCRIPT language="javascript"");
out.println("function check(){");
out.println("if(form1.username.value.length1||form1.ucontent.value.length1)");
out.println("{alert(姓名和留言是必须有的!);}else{form1.submit();}}");
out.println("/SCRIPT");
out.close();
}
/** Handles the HTTP codeGET/code method.
* @param request servlet request
* @param response servlet response
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
processRequest(request, response);
}
/** Handles the HTTP codePOST/code method.
* @param request servlet request
* @param response servlet response
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
processRequest(request, response);
}
protected void getDsnConn(){
String sqlUrl="jdbc:mysql://10.0.0.1/你申请用户名?user=你的名字password=你的帐号";
try{
if(debug)
conn=DriverManager.getConnection("jdbc:odbc:ODBC源","用户名","密码口令");
else
conn=DriverManager.getConnection(sqlUrl);
}
catch(SQLException es){
System.err.println("和库连接时出错:"+es.getMessage());
}
}
protected void executeInsert(String sqlStr){
try{
Statement stmt=conn.createStatement();
stmt.executeUpdate(sqlStr);
}
catch(SQLException es){
System.err.println("执行插入时:"+es.getMessage());
}
}
protected void executeUpdate(String sqlStr){
try{
Statement stmt=conn.createStatement();
stmt.executeUpdate(sqlStr);
}
catch(SQLException e){
System.err.println("error in query record");
}
}
//查寻
protected ResultSet executeQuery(String sqlStr){
rs=null;
try{
Statement stmt=conn.createStatement();
rs=stmt.executeQuery(sqlStr);
}
catch(SQLException ex){
System.err.println("执行查寻出错："+ex.getMessage());
}
return rs;
}
protected ResultSet executeScrollableQuery(String sqlStr){
rs=null;
try{
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs=stmt.executeQuery(sqlStr);

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