求助,我编了一个代码如下的blog类,为什么当我使用checkEnable()方法的时候返回的总是空值?package com.blog.domain;import com.blog.dao.*;
import java.sql.*;
import java.util.Hashtable;public class Blog {
private String usrId;
private String nickname;
private String subject;
private String entryKey;
private String email;
private String description;
private Hashtable ArticleHashtable;
private Hashtable FeedBackHashtable;
private Hashtable LinkHashtable;
public void setusrId(String uId){
usrId=uId;
}
public void setnickname(String nname){
nickname=nname;
}
public void setsubject(String sub){
subject=sub;
}
public void setentryKey(String eKey){
entryKey=eKey;
}
public void setemail(String e){
email=e;
}
public void setdescription(String des){
description=des;
}
public String getentryKey(){
return entryKey;
}
public String getusrId(){
return usrId;
}
public static Blog load(String id){
String sqlString;
Connection con=null;
Statement stmt=null;
ResultSet rs=null;
Blog blog=new Blog();
sqlString="select * from blog where usrId="+id;
try{
con=ConnectionManager.getConn();
stmt=con.createStatement();
rs=stmt.executeQuery(sqlString);
while(rs.next()){
blog.setusrId(rs.getString("usrId"));
blog.setnickname(rs.getString("nickname"));
blog.setsubject(rs.getString("subject"));
blog.setentryKey(rs.getString("entryKey"));
blog.setemail(rs.getString("email"));
blog.setdescription(rs.getString("description"));
}
}
catch(Exception e){
e.printStackTrace();
}
finally{
try{
rs.close();
}
catch(Exception e){
e.printStackTrace();
}
try{
stmt.close();
}
catch(Exception p){
p.printStackTrace();
}
try{
con.close();
}
catch(Exception q){
q.printStackTrace();
}
}
return blog;
}
public static Blog checkEnable(String id, String apsw){
Blog blog=new Blog();
blog=load(id);
if(blog!=null){
String password=blog.getentryKey();
if(password!=apsw){
blog=null;
}
}
return blog;
}}
import java.sql.*;
import java.util.Hashtable;public class Blog {
private String usrId;
private String nickname;
private String subject;
private String entryKey;
private String email;
private String description;
private Hashtable ArticleHashtable;
private Hashtable FeedBackHashtable;
private Hashtable LinkHashtable;
public void setusrId(String uId){
usrId=uId;
}
public void setnickname(String nname){
nickname=nname;
}
public void setsubject(String sub){
subject=sub;
}
public void setentryKey(String eKey){
entryKey=eKey;
}
public void setemail(String e){
email=e;
}
public void setdescription(String des){
description=des;
}
public String getentryKey(){
return entryKey;
}
public String getusrId(){
return usrId;
}
public static Blog load(String id){
String sqlString;
Connection con=null;
Statement stmt=null;
ResultSet rs=null;
Blog blog=new Blog();
sqlString="select * from blog where usrId="+id;
try{
con=ConnectionManager.getConn();
stmt=con.createStatement();
rs=stmt.executeQuery(sqlString);
while(rs.next()){
blog.setusrId(rs.getString("usrId"));
blog.setnickname(rs.getString("nickname"));
blog.setsubject(rs.getString("subject"));
blog.setentryKey(rs.getString("entryKey"));
blog.setemail(rs.getString("email"));
blog.setdescription(rs.getString("description"));
}
}
catch(Exception e){
e.printStackTrace();
}
finally{
try{
rs.close();
}
catch(Exception e){
e.printStackTrace();
}
try{
stmt.close();
}
catch(Exception p){
p.printStackTrace();
}
try{
con.close();
}
catch(Exception q){
q.printStackTrace();
}
}
return blog;
}
public static Blog checkEnable(String id, String apsw){
Blog blog=new Blog();
blog=load(id);
if(blog!=null){
String password=blog.getentryKey();
if(password!=apsw){
blog=null;
}
}
return blog;
}}
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但是我编了一段测试代码:
<%@page language="java" contentType="text/html;charset=gb2312" import="java.util.*"%>
<%@page import="com.blog.domain.*"%>
<%@page import="com.blog.coordinator.*"%>
<%@page import="com.blog.dao.*"%>
<%@page import="java.sql.*"%>
<%@page import="java.lang.String"%>
<%
String adminname=request.getParameter("adminname");
String password=request.getParameter("password"); String sqlString;
Connection con=null;
PreparedStatement ps=null;
ResultSet rs=null;
Blog blog=new Blog();
sqlString="select * from blog where usrId="+Integer.parseInt(adminname); con=ConnectionManager.getConn();
ps=con.prepareStatement(sqlString);
rs=ps.executeQuery();
while(rs.next()){
blog.setusrId(rs.getInt("usrId"));
blog.setentryKey(rs.getString("entryKey"));}String entryKey=blog.getentryKey();
out.println(password);
out.println(entryKey);
if(password.equals(entryKey)){
out.println(password);
out.println(entryKey);
}
%>
前面两个out.println();可以显示出返回值,是两个一样的字符串,但是后面两个out.println()就不显示了,不知道是什么原因???