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struts中文的解決

轉自 www.javaresearch.org
作者 fishandfly

1.使ApplicationResources.properties支持中文
建立一個ApplicationResources_ISO.properties文件，把應用程序用的message都寫進去，然后在dos下執行這個命令，
native2ascii -encoding gb2312 ApplicationResources_ISO.properties ApplicationResources.properties
這樣就會將ISO編碼的ApplicationResources轉換成GB2312編碼的格式了，同時保存到ApplicationResources.properties.
native2ascii這個工具是jdk自帶的一個東東，所以如果path都設定正確就可以直接運行了，你可以在$java_home$/bin下找到他。
轉換后的中文類似于這個樣子
iso 格式下：tj.type=商品車類型
gb2312格式下：tj.type=\u5546\u54c1\u8f66\u7c7b\u578b
然后在struts-config.xml中設置應用這個資源文件
<message-resources parameter="com.huahang.tj.ApplicationResources" key="org.apache.struts.action.MESSAGE" />
開發jsp時在jsp的開頭寫上<%@ page contentType="text/html; charset=gb2312" %>，將字符集設置成gb2312就可以了。

2.使數據庫操作支持中文。
數據庫操作支持中文一直讓我比較頭痛，但是感謝善解人衣向我推薦了www.chinaxp.org，這個網站是用struts框架開發的，而且
開放源碼，下載了源碼后發現它的中文處理得很好，閱讀部分源碼，沒有發現什么特殊的字符集轉換，很納悶，偶然看到樓上網友
留言知道原來servlet可以統一設置字符轉換。chinaxp.org就是這么做的。
在web.xml中加上
<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>com.huahang.tj.struts.filters.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB2312</param-value>
</init-param>
<init-param>
<param-name>ignore</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Set Character Encoding</filter-name>
<servlet-name>action</servlet-name>
</filter-mapping>
這里會涉及一個bean,源碼如下：
/*
* XP Forum
*
* Copyright Coffee

2002-2003 RedSoft Group. All rights reserved.
*
*/
package com.huahang.tj.struts.filters;

import javax.servlet.*;
import java.io.IOException;

/**
* Filter that sets the character encoding to be used in parsing the
* incoming request, either unconditionally or only if the client did not
* specify a character encoding. Configuration of this filter is based on
* the following initialization parameters:
* <ul>
* <li>encoding - The character encoding to be configured
* for this request, either conditionally or unconditionally based on
* the <code>ignore</code> initialization parameter. This parameter
* is required, so there is no default.</li>
* <li>ignore - If set to "true", any character encoding
* specified by the client is ignored, and the value returned by the
* <code>selectEncoding()</code> method is set. If set to "false,
* <code>selectEncoding()</code> is called only if the
* client has not already specified an encoding. By default, this
* parameter is set to "true".</li>
* </ul>
*
* Although this filter can be used unchanged, it is also easy to
* subclass it and make the <code>selectEncoding()</code> method more
* intelligent about what encoding to choose, based on characteristics of
* the incoming request (such as the values of the <code>Accept-Language</code>
* and <code>User-Agent</code> headers, or a value stashed in the current
* user's session.
*
* @author <a href="mailto:jwtronics@yahoo.com">John Wong</a>
*
* @version $Id: SetCharacterEncodingFilter.java,v 1.1 2002/04/10 13:59:27 johnwong Exp $
*/
public class SetCharacterEncodingFilter implements Filter {

// ----------------------------------------------------- Instance Variables

/**
* The default character encoding to set for requests that pass through
* this filter.
*/
protected String encoding = null;

/**
* The filter configuration object we are associated with. If this value
* is null, this filter instance is not currently configured.
*/
protected FilterConfig filterConfig = null;

/**
* Should a character encoding specified by the client be ignored?
*/
protected boolean ignore = true;

// --------------------------------------------------------- Public Methods

/**
* Take this filter out of service.
*/
public void destroy() {

this.encoding = null;
this.filterConfig = null;

}

/**
* Select and set (if specified) the character encoding to be used to
* interpret request parameters for this request.
*
* @param request The servlet request we are processing
* @param result The servlet response we are creating
* @param chain The filter chain we are processing
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet error occurs
*/
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {

// Conditionally select and set the character encoding to be used
if (ignore || (request.getCharacterEncoding() == null)) {
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
}

// Pass control on to the next filter
chain.doFilter(request, response);

}

/**
* Place this filter into service.
*
* @param filterConfig The filter configuration object
*/
public void init(FilterConfig filterConfig) throws ServletException {

this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
String value = filterConfig.getInitParameter("ignore");
if (value == null)
this.ignore = true;
else if (value.equalsIgnoreCase("true"))
this.ignore = true;
else if (value.equalsIgnoreCase("yes"))
this.ignore = true;
else
this.ignore = false;

}

// ------------------------------------------------------ Protected Methods

/**
* Select an appropriate character encoding to be used, based on the
* characteristics of the current request and/or filter initialization
* parameters. If no character encoding should be set, return
* <code>null</code>.
* 
* The default implementation unconditionally returns the value configured
* by the encoding initialization parameter for this
* filter.
*
* @param request The servlet request we are processing
*/
protected String selectEncoding(ServletRequest request) {

return (this.encoding);

}

}//EOC
加上這個后，在action中就可以直接從form中接收gb2312編碼的數據了，返回時自然也是gb2312了。
但是這個好像需要servlet 2.2以上的容器

綜合上面的方法，我解決了struts中的中文問題，現在還沒發現新的問題。

我的環境是
windows2000 Professional,tomcat 4.04 , struts1.1b2

posted on 2005-12-27 15:56 javaGrowing 閱讀(366) 評論(0) 編輯收藏所屬分類: struts學習

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