JSP服务输出到UTF-8

Question

有一个有趣的问题。。我们的防火墙后面有一个wordpress XML/RSS服务，该服务本地化到多个国家，可以与中文、俄文等完美结合。

为了公开这个服务，我们创建了一个简单的JSP服务，由于某些原因，它不会呈现外来字符。

任何想法都将不胜感激。

<%@ page language="java" contentType="application/xml; charset=utf-8" pageEncoding="utf-8"%>
<%@ page session="false"%>
<%@ page import='java.io.BufferedReader' %> 
<%@ page import='java.io.InputStreamReader' %> 
<%@ page import='java.io.IOException' %> 
<%@ page import='java.io.PrintWriter' %> 
<%@ page import='java.net.URL' %> 
<%@ page import='java.net.URLConnection' %> 

<%

//final String URL_BASE = "http://localhost:8080/index.php/";
final String URL_BASE = "http://INTERNALSERVERIP:8888/index.php/";
final String NL = System.getProperty("line.separator");

BufferedReader br = null;
try
{
    String feedName = request.getParameter("name");

    // if no feed was specified
    if (feedName == null || feedName.trim().length() == 0)
    {
        feedName = "feed1";
    }

    // set the URL based off the feed name
    String urlStr = URL_BASE + feedName.trim().toLowerCase();
    System.out.println("urlStr: " + urlStr);

    URL url = new URL(urlStr);
    URLConnection urlCon = url.openConnection();

    br = new BufferedReader(new InputStreamReader(urlCon.getInputStream()));

    String resLine = null;
    while ((resLine = br.readLine()) != null) 
    {
        resLine= new String(resLine.getBytes("ISO8859_1"), "UTF8");  
        out.println(resLine);
    }
}
catch (Throwable t)
{
    t.printStackTrace(new PrintWriter(out));
}
finally
{
    if (br != null)
    {
        try
        {
            br.close();
        }
        catch (IOException ioe)
        {}
    }
}
%>

Answer 1

按照Jasper de Vries的建议，使用UTF8字符集创建InputStreamReader（如下所示）。

br = new BufferedReader(new InputStreamReader(urlCon.getInputStream(), "UTF8"));

然后，您不需要在循环中转换字符串的字符集，因此可以删除/注释它。下面是jsp的修改版本。

<%@ page language="java" contentType="application/xml; charset=utf-8" pageEncoding="utf-8"%>
<%@ page session="false"%>
<%@ page import='java.io.BufferedReader' %> 
<%@ page import='java.io.InputStreamReader' %> 
<%@ page import='java.io.IOException' %> 
<%@ page import='java.io.PrintWriter' %> 
<%@ page import='java.net.URL' %> 
<%@ page import='java.net.URLConnection' %> 

<%

//final String URL_BASE = "http://localhost:8080/index.php/";
final String URL_BASE = "http://INTERNALSERVERIP:8888/index.php/";
final String NL = System.getProperty("line.separator");

BufferedReader br = null;
try
{
    String feedName = request.getParameter("name");

    // if no feed was specified
    if (feedName == null || feedName.trim().length() == 0)
    {
        feedName = "feed1";
    }

    // set the URL based off the feed name
    String urlStr = URL_BASE + feedName.trim().toLowerCase();
    System.out.println("urlStr: " + urlStr);

    URL url = new URL(urlStr);
    URLConnection urlCon = url.openConnection();

    br = new BufferedReader(new InputStreamReader(urlCon.getInputStream(), "UTF8"));

    String resLine = null;
    while ((resLine = br.readLine()) != null) 
    {
        // resLine= new String(resLine.getBytes("ISO8859_1"), "UTF8");  
        out.println(resLine);
    }
}
catch (Throwable t)
{
    t.printStackTrace(new PrintWriter(out));
}
finally
{
    if (br != null)
    {
        try
        {
            br.close();
        }
        catch (IOException ioe)
        {}
    }
}
%>

希望有帮助。：）