Struts+Mysql+Tomcat5.0.28+mysql-connector-java-3.0.16-ga-bin
| Struts+Mysql+Tomcat5.0.28+mysql-connector-java-3.0.16-ga-bin 国际化的东西带来的问题还真的好多，各国语言不同，所使用的字符集都不一样，JAVA，Mysql，Tomcat，浏览器等等用的字符集也不一样，这几天气得我都说了好几次不用什么Struts，Mysql，Tomcat了，全部都是自己写出来好了，用统一的编码统一的字符集，可惜能力不够，说说而已，问题还是得解决。在网上查了好久，自己也实践了好多天，问题终于算是解决了。 因为要考虑到很多国的语言，一开始就把项目立足于国际化，在把连接方式从Struts连接池改为Tomcat的连接池之后，原来我遇到的乱码有 1、资源文件里读出来在页面上的乱码； 2、数据库读出来的乱码 3、数据库写进去的乱码 4、在ActionForm验证不通过Errors返回的乱码，也就是request，IE参数传递的乱码了。 5、有一个JS写的时间选择跳出框，如果在charset=UTF-8的时候就出错，但如果我改为charset=GBK或GB2312时就一切正常了，很奇怪的现象，我还找不出答案来。 哇，好多的乱码。。。。头都大了好几天。 下面是我的解决方法 1、资源文件里读出来在页面上的乱码：这个最容易解决了，把写好的ApplicationResources.properties文件，在DOC底下用 native2ascii -encoding gb2312 ApplicationResources.properties ApplicationResources_zh_CN.properties 命令来个字符编码转换，将原来的中文转为Unicode编码就搞定了中文简体，繁体也用同样的命令，只是把 bg2312 改为 bgk 就可以了。 2、数据库读写的乱码，刚开始的时候因为受以前的SQL Server+JDBC 影响（在那时写入数据库是可以不用做什么工作的，只是在读出来的时候来个 gbk = new String(iso.getBytes("ISO-8859-1"), "GBK") 转换就行了）我也都在把读写都在转换，搞得好复杂也很麻烦，后来在连接池连接代码jdbc:mysql://localhost:3306/database?autoReconnect=true&useUnicode=true&characterEncoding=GBK那里加上一个&useUnicode=true&characterEncoding=GBK，保证了在数据库操作时候使用了统一的编码字符集，又解决了两个乱码问题，一举两得，嘿嘿。 4、request,response的乱码在网上找了好久，也有两个解决的办法，也是来个转换，还有种办法是写一个过滤器，我选择了后者，因为简单：），这方法用到两个文件，一个是 filter ,一个是 web.xml 文件，代码在后面。 5、至于JS的这个问题，还没办法，只好在JSP页面上改为<%@ page contentType=“text/html; charset=GBK“%>了，反正这样也没问题。 到此为止，乱码问题总算告一段落了，感觉蛮不错的，郁闷了这么久，终于可以高兴了好大一段子了。 ------------------------------------------------------------------------------------------------------------------- 过滤器使用代码：EncodingFilter.java package com.***.***.***; import javax.servlet.*; import java.io.IOException; /** * <p>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> * */ public class EncodingFilter 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); } }//EOC WEB.XML文件：将下面的代码放在WEB.xml文件的<display-name>下面就行了 <filter> <filter-name>encodingFilter</filter-name> <display-name>EncodingFilter</display-name> <description>Set the request encoding</description> <filter-class>com.voip.admin.util.EncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>GB18030</param-value> </init-param> <init-param> <param-name>ignore</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> |