Java 如何解决ResultSet关闭后不允许的错误操作
我尝试执行此代码,它将显示以下错误: 结果集关闭后不允许java.sql.SQLException.Operation 这是我的代码。在此代码中,代码本身显示了上述错误Java 如何解决ResultSet关闭后不允许的错误操作,java,css,sql-server,Java,Css,Sql Server,我尝试执行此代码,它将显示以下错误: 结果集关闭后不允许java.sql.SQLException.Operation 这是我的代码。在此代码中,代码本身显示了上述错误 <table cellspacing="0"> <% try{ ResultSet rs1=st.executeQuery("select u.post_id,u.userid,u.post_txt from requestdetails as r inner join user_post
<table cellspacing="0">
<%
try{
ResultSet rs1=st.executeQuery("select u.post_id,u.userid,u.post_txt from requestdetails as r inner join user_post as u on r.frdname=u.userid where r.userid='"+id+"'");
while(rs1.next()){
int post_id=rs1.getInt(1);
int fid=rs1.getInt(2);
System.out.println("iiii "+fid);
String text=rs1.getString(3);
System.out.println("txttt "+text);
ResultSet rs3=stat.executeQuery("select * from userdetails where userid='"+fid+"'");
if(rs3.next()){
String na=rs3.getString("username");
System.out.println("username "+na);
String img=rs3.getString("profilepic");
System.out.println("imgee "+img);
%>
<tr>
<td width="5%" style="padding-left:25;" rowspan="2"> <img src="images/<%=img%>" height="60" width="55"> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td colspan="3" style="padding:7;"><a href="" style="text-transform:capitalize; text-decoration:none; color:#003399;" onMouseOver="" onMouseOut="" id=""><%=rs3.getString("username") %></a> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td></td>
<td colspan="3" style="padding-left:7;"><%=text %></td>
</tr>
<%
ResultSet rr=st.executeQuery("select * from comment_status where post_id='"+post_id+"'");
while(rr.next()){
int uid=rr.getInt("userid");
String cmt=rr.getString("comment");
ResultSet rrr=stat.executeQuery("select * from userdetails where userid='"+uid+"'");
if(rrr.next()){
%>
<tr>
<td> </td>
<td width="4%" bgcolor="#EDEFF4" style="padding-left:12;" rowspan="2"> <img src="" height="40" width="47"> </td>
<td bgcolor="#EDEFF4" style="padding-left:7;" > <a href="" style="text-transform:capitalize; text-decoration:none; color:#3B5998;" onMouseOver="Comment_name_underLine()" onMouseOut="Comment_name_NounderLine()" id="cuname"><%=rrr.getString("username") %></a> </td>
<td align="right" rowspan="2" bgcolor="#EDEFF4">
</tr>
<tr>
<td> </td>
<td bgcolor="#EDEFF4" style="padding-left:7;" colspan="2"><%=cmt %></td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<%
}
}
%>
<tr>
<td> </td>
<td width="4%" style="padding-left:17;" bgcolor="#EDEFF4" rowspan="2"> <img src="images/" height="33" width="33"> </td>
<td bgcolor="#EDEFF4" colspan="2" style="padding-top:15;">
<form method="post" name="commenting" onSubmit="return blank_comment_check()" action="commentstatus.jsp">
<input type="text" name="comment_txt" placeholder="Write a comment..." maxlength="420" style="width:100px;" id="">
<input type="hidden" name="postid" value="<%=post_id%>">
<input type="hidden" name="userid" value="">
<input type="submit" name="comment" style="display:none;">
</form>
</td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td colspan="4"align="right" style="border-top:outset; border-top-width:thin;"> </td>
</tr>
<%
}
}
}catch(Exception e){
e.printStackTrace();
}
%>
</table>
</div>
“height=“60”width=“55”>
我不知道我在上面的代码中犯了什么错误。我犯了一个错误,在所有查询中使用了相同的语句
当我为解决方案创建不同的statements对象时,它工作正常。在我这样更改代码后,它工作正常
Statement stt=con.createStatement();
ResultSet rs1=stt.executeQuery("select u.post_id,u.userid,u.post_txt from requestdetails as r inner join user_post as u on r.frdname=u.userid where r.userid='"+id+"'");
while(rs1.next()){
int post_id=rs1.getInt(1);
int fid=rs1.getInt(2);
System.out.println("iiii "+fid);
String text=rs1.getString(3);
System.out.println("txttt "+text);
Statement st1=con.createStatement();
ResultSet rs3=st1.executeQuery("select * from userdetails where userid='"+fid+"'");
if(rs3.next()){
String na=rs3.getString("username");
System.out.println("username "+na);
String img=rs3.getString("profilepic");
System.out.println("imgee "+img);
发布完整的堆栈跟踪!!这是完整的堆栈跟踪bro..上面的标记堆栈跟踪已关闭..不,它没有指示您在哪一行遇到异常..!检查此项,谢谢兄弟..我已完成..这是完整的代码…解释您的更改以及您的代码现在工作的原因;)。您只需查看我上面的错误代码即可t代码为所有查询创建了相同的语句对象。也没有为语句分配对象。这就是为什么它显示错误的原因。在我将代码更改为“为不同查询创建不同的语句对象”后,它工作正常。。