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主題: [Java&JSP] [討論]關於jsp轉utf-8的方法及get問題   字型大小:||| 
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十週年紀念徽章(四級)  

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#1 : 2007-8-1 04:11 PM     只看本作者 引言回覆

之前我同事常常說我寫的網頁
每次輸入簡體字或一些字
大部分都變問號

要不然就亂碼要不然就一片混亂
趁這次改版的時候把他全部utf-8化
每個網頁開頭都改成

<%@ page contentType="text/html;charset=utf-8>
<% request.setCharacterEncoding("utf-8"); %>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">


mysql也把他改成utf-8匯出再匯入
所有網頁程式也轉成utf-8~~
大致上讀取寫入資料庫都沒問題



但遇到幾個怪問題
1. 網頁如果用include語法
<%@ include file = "a.jsp"%>
會有莫名其妙的斷行問題~~
看到有人在javaworld也問相同問題
http://www.javaworld.com.tw/jute ... =1&ppg=1#187901

2. form用get傳送只要中文字
     另一端收到的中文都是亂碼~~~~


不知道大家怎處理form用get傳送中文字呢?



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十週年紀念徽章(五級)  

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#2 : 2007-8-1 07:38 PM     只看本作者 引言回覆

不要用get method,改用post
get轉碼錯亂很正常
如果用utf-8..要注意bom
後端的server是什麼?
tomcat的話就改server預設的encoding

[dayi 在  2007-8-1 07:39 PM 作了最後編輯]



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#3 : 2007-8-30 01:45 AM     只看本作者 引言回覆

也可以使用  過濾器filter  將整個站固定編碼~

SetCharacterEncodingFilter.java 放在 filters package 下

/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/


package filters;


import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;


/**
* <p>Example 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:</p>
* <ul>
* <li><strong>encoding</strong> - 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><strong>ignore</strong> - 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 <strong>only</strong> if the
*     client has not already specified an encoding.  By default, this
*     parameter is set to "true".</li>
* </ul>
*
* <p>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.</p>
*
* @author Craig McClanahan
* @version $Revision: 1.2 $ $Date: 2004/03/18 16:40:28 $
*/

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>.
     * <p>
     * The default implementation unconditionally returns the value configured
     * by the <strong>encoding</strong> initialization parameter for this
     * filter.
     *
     * @param request The servlet request we are processing
     */
    protected String selectEncoding(ServletRequest request) {

        return (this.encoding);

    }


}
web.xml 放在<web-app>內</web-app>

<!-- filter -->
<filter>
        <filter-name>SetCharacterEncoding</filter-name>
        <filter-class>filters.SetCharacterEncodingFilter</filter-class>
        <init-param>
                <param-name>encoding</param-name>
                <param-value>UTF-8</param-value>
        </init-param>
</filter>
<filter-mapping>
        <filter-name>SetCharacterEncoding</filter-name>
        <url-pattern>/*</url-pattern>
</filter-mapping>
以上這番,就可行了~ 不論伺服器設定啥,都能自動轉UTF-8~



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