请看看小弟的一个郁闷的equals!

Gundam_zero 2005-09-16 12:10:43

小弟刚学了JSP，想做网络聊天室，可是有个郁闷的equals一直没有解决，两天了，郁闷，请大哥们帮我看看.
工程目录:D:/eclipse/workspace/Takeing Takeing：是工程名
jsp文件在Takeing里面.
Bean在：D:/eclipse/workspace/Takeing/WEB-INF/classes/Bean里面。

请看下面的BEAN和.JSP

package Bean;
import java.sql.*;

public class Login {
String logname,password,success="false",message;
Connection con=null;
Statement stat=null;
ResultSet rs;
public Login(){
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
}catch(ClassNotFoundException e){
System.out.println("加载数据库驱动程序有问题,请检查!--in Login");
}
}
public void setLogname(String log){
logname=log;
}
public String getLogname(){
return logname;
}
public void setPassword(String ps){
password=ps;
}
public String getPassword(){
return password;
}
public String getSuccess(){
return success;
}
public String getMessage(){
try{
con=DriverManager.getConnection("jdbc:microsoft:sqlserver://mazhiyong:1433;DatabaseName=friend","sa","sa");
stat=con.createStatement();
String sql="select * from member where logname="+"'"+logname+"'";
rs=stat.executeQuery(sql);
int rowcount=0;
String ps=new String();
while(rs.next()){
rowcount++;
logname=rs.getString("logname");
ps=rs.getString("password");
System.out.println(rowcount);
}
boolean bo=password.equals(ps); //下面的输出语句测试出输入的密码和数据库里面的密码
System.out.println(bo); //bo的值总是false，但不输入密码就是true
System.out.println(password.equals(ps));
System.out.println("password="+password);
System.out.println("ps="+ps);
if((rowcount==1)&&(password.equals(ps))){
System.out.println("option ok!");
success="ok";
message="ok";
}
else{
message="输入的用户名或密码不对!";
success="false";
}
con.close();
return message;
}catch(SQLException e){
message="输入的用户名或密码不对!---in catch ";
success="false";
return message;
}
}
}

login.jsp
<%@ page contentType="text/html;charset=GB2312" %>
<%@ page import="Bean.Login"%>

<%!
public String codeString(String s){
String str=s;
try{
byte b[]=str.getBytes("ISO-8859-1");
str=new String(b);
return str;
}catch(Exception e){
System.out.println("不能转换!");
return str;
}
}
%>
<html>
<body bgcolor=yellow><font size=5>
<%@ include file="head.txt"%>
<p>
请输入你的用户名和密码:
<%String str=response.encodeURL("login.jsp");%>
<FORM action="<%=str%>" Method="post">
<br>登陆名<input type="text" name="logname" value="登陆名">
<br>密码<input type="password" name="password">
<p>
<input type="submit" name="submit" value="提交">
<input type="reset" name="reset" value="重置">
</form>
<jsp:useBean id="login" scope="session" class="Bean.Login"/>
<%
String logname="",password="",message="";
if(!(session.isNew())){

logname=request.getParameter("logname");//提取用户名,并转为字符
if(logname==null) logname="";
logname=codeString(logname);
out.print("会员名:");//
out.print(logname+"<br>");

password=request.getParameter("password");
if(password==null) password="";
password=codeString(password);
out.print("密码:");
out.print(password+"<br>");
}
%>
<%
if(!(logname.equals(""))){

%>
<jsp:setProperty name= "login" property="logname" value="<%=logname%>" />
<jsp:setProperty name= "login" property="password" value="<%=password%>" />
<%
message=login.getMessage();
out.println("getmessage");
if(message==null) {message="";}
out.print(message);
}
%>
<%
if(!(session.isNew())){
out.println("gonging11111111");
if(message.equals("ok")){
out.print("登陆成功!转到showMember页面");
String meb=response.encodeURL("showMember.jsp");
response.sendRedirect(meb);
}
else {
out.println("message:");
out.println(message+"null");
out.println("over message!");
}
}
%>
</font></body>
</html>

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