character encoding in JSF 1.1_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2023-03-06 12:38 出处：网络

I\'m developing a tool using JSF 1.1 and I\'m having this problem : I have a String in my backin开发者_如何学运维g bean which is printed as:

I'm developing a tool using JSF 1.1 and I'm having this problem : I have a String in my backin开发者_如何学运维g bean which is printed as:

./src.cpp: In function ‘int main()’:
./src.cpp:4: error: ‘dsdada’ was not declared in this scope

on a txt file.

But when I put it on a h:inputTextArea, it goes like this:

./src.cpp: In function â€˜int main()â€™:
./src.cpp:4: error: â€˜dsdadaâ€™ was not declared in this scope

<%@ page contentType="text/html;charset=UTF-8" %>
and this
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>

But it didn't work either. can somebody tell me how to fix this. Thanks

/* String[0] as stdout, String[1] as stderr */
String[] results = sshBO.execCommand(cmd, timeout);

/* Done with SSH things */
sshBO.closeSession();

/* Bring the output and err to the presentation */
msg = results[1]+results[0];
FileServices.saveStringToFile("F:/myoutput.txt", msg);
msg = new String(msg.getBytes("UTF8"), "UTF8"); /* makes no difference */

on the JSP pages :

<%@ page contentType="text/html;charset=UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://sakaiproject.org/jsf/sakai" prefix="sakai" %>

<f:view >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
...

<h:inputTextarea disabled="true" value="#{SSH.msg}" styleClass="myTextArea" />

The character ‘ exist in Unicode of the bytes 0xE2 0x80 0x98. When you use the CP1252 (Windows default) encoding to encode those bytes, you get â€˜.

You need to explicitly set the pageEncoding to UTF-8.

<%@ page pageEncoding="UTF-8" %>

This way it will print the characters using UTF-8 and implicitly set the Content-Type header right.

In order to determine the source of your transcoding bug, inspect the data after each transcoding operation. Use a tool like this one to determine what the values should be.

For example, Java strings are being transcoded from UTF-16 (the encoding of Java strings) to UTF-8 by your JSP writer. The other transcoding operation looks like reading program output from the native system.

/* String[0] as stdout, String[1] as stderr */
String[] results = sshBO.execCommand(cmd, timeout);

For example, you can print the hex values of your strings using code like this:

for (char ch : msg.toCharArray())
  System.out.format("%04x ", (int) ch);

The code point ‘ should print as 2018. Your file writing code may share a similar bug to the code that reads input, misleading you about the source of the problem.

msg = new String(msg.getBytes("UTF8"), "UTF8"); /* makes no difference */

This makes no difference because it takes UTF-16 data, transcodes it to UTF-8, then transcodes it back to UTF-16. But aside from that, if your string is corrupt, it's already too late. You're fixing the bug in the wrong place.