中文乱码用url传到action

Tomcat+MySql+Struts的中文乱码问题
在做以下工作之前，所有的HTML/JSP的charset都设为charset=gb2312。第一个要解决的是表单提交乱码问题。在使用Struts提供的ActionForm过程中，无论表单采用的是Struts标签还是Html标签，都可以用ActionForm的Get/Set来获取和设置表单的元素值（它们的作用效果与request.getParameter()方法一样），但提取出来的数据不经过处理的话就是乱码，主要的原因是1.Tomcat的J2EE实现对表单提交即Post方法提交时，处理参数采用默认的ISO8859_1来处理2.Tomcat对Get方法提交的请求在query-string处理时采用了和Post方法不一样的处理方式。所以如果要正确地显示和获取中文数据采用的解决方案：（1）对于Post方法提交的表单通过编写一个过滤器（filer）的方法解决，过滤器在用户提交的数据被处理之前被调用，可以通过这个Java代码改变参数的编码方式（目标编码方式可以通过Web.xml文件里面的参数指定）。过滤器的代码如下：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;
import javax.servlet.UnavailableException;/**
* 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:
* <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 Craig McClanahan
* @version $Revision: 1.2 $ $Date: 2004/03/18 16:40:33 $
*/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); }}编绎后把class文件放在classes目录下，并在Web应用的web.xml文件中添加如下代码：<filter>
 <filter-name>Set Character Encoding</filter-name>
 <filter-class>com.neusoft.equipment.controller.SetCharacterEncodingFilter</filter-class>
 <init-param>
 <param-name>encoding</param-name>
 <param-value>gbk</param-value>
 </init-param>
</filter>
<filter-mapping>
 <filter-name>Set Character Encoding</filter-name>
 <url-pattern>/*</url-pattern>
</filter-mapping>只要是gb2312,gbk,utf8等支持多字节编码的字符集都可以储存汉字，当然，gb2312中的汉字数量远少于gbk，而gb2312,gbk等都可在utf8下编码，这里指定目标编码方式是gbk，重新启动Tomcat后就可以了。
（2）对Get方法提交的表单，由于参数是紧跟在用户的URL请求后面，Tomcat对其的处理方法与Post方法不一样。所以上面设置的过滤器对Get方法没有作用，它需要在其他地方设置。找到Tomca的server.xml配置文件，找到对80（或者是8080等别的，这个是自己修改后的）的Connector组件的设置部分，给这个Connector组件添加一个属性：URIEncoding＝"GBK"。修改后的Connector组件是这样的： 
 <Connector port="80" maxHttpHeaderSize="8192"
 maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
 enableLookups="false" redirectPort="8443" acceptCount="100"
 connectionTimeout="20000" disableUploadTimeout="true" URIEncoding＝"GBK"/>这样修改后，重启Tomcat就可以正确处理GET方法提交的表单数据了。 第二个要解决的是数据库存取数据出现的乱码等情况。对于不同的数据库往往支持不同的编码，造成了应用时比较混乱，不同的数据库的解决方法往往是不同的，针对MySql，网上也有各种各样的解决方案，但个人觉得那些太繁了，现在有一个极其简单的解决办法：修改MySql的配置文件，打开MySql安装后的根目录，找到my.init文件，把[mysqld]区的如下语句：default-character-set=latin1修改为：default-character-set=gbk，然后在[client]区增加：default-character-set=gbk，修改后记得做一件事情，到Widows控制面板的管理工具下的服务程序，把Mysql服务停止了重新启动，这样就根本解决了MySql的数据库乱码问题，很简单～～～～

同意3楼的，其实那个类在tomcat自带的例子中有

1 我确认你的系统采用的UTF-8编码，如果用GBK不会出现单数汉字的乱码问题
2 解决方法,换POST提交吧，这个又简单，又好用
3 看看 google 的搜索吧，他就是 UTF-8的

解决乱码问题的方法有两种：
（1）创建函数来解决，通过gb2312来编码解决乱码问题，代码如下：
<%@page contentType="test/html;charset=gb2312"%>
<%@page import="java.io.*"%>
<%!
String change(String str)
{
 String trans=null;
 Byte temp[];
 try
{
 temp=str.getBytes("gb2312");
 trans=new String(temp);
}
catch(UnsupportedEncodingException e)
{
System.out.println(e.toString());
} return trans;}
%>
(2)第一种方法相对而言比较耗费时间，另外还有一种更加简单的方法：<%@page contentType="test/html;charset=gb2312"%>
<%
 request.setCharacterEncoding("gb2312")
%>

我是写一个java类做分页的功能传一个url 给java类, 用<a href="url">发送的,用UTF-8的编码请问如何解决

部分代码
<tr>
<td height="50" valign="top" align="center" class="">
<%=RtPage.getPagination(request,"../program.do?method=queryProgramByTitle&title="+request.getAttribute("title")+"&status="+request.getAttribute("status")+"&",
"pageIndex", "rowCount", "pageSize")%>
</td>
</tr>红色表示传入java类里的url
java部分代码:
previousPage = "<a href='"+url+"topage="+firstIndex+"'>"+"3 "+"</a>";jsp 用UTF-8的编码.用双数汉字可以点击上下页,用单数汉字就不行,如果是三个汉字,点击下页时,查询条件框,显示前二个汉字是好的,第三个汉字就是乱码.请问是怎么回事.

写一个过滤器。
package what;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;public class gl implements Filter { public void init(FilterConfig arg0) throws ServletException { } public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
arg0.setCharacterEncoding("GBK");
arg1.setCharacterEncoding("GBK");
arg2.doFilter(arg0, arg1);
} public void destroy() { }}
在XML里配置下
<filter>
<filter-name>gl</filter-name>
<filter-class>what.gl</filter-class>
</filter>
<filter-mapping>
<filter-name>gl</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

ie6会有单数的汉字最后一个显示不正常的bug,ie7和ie8就没问题

调试易

中文乱码用url传到action

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中文乱码 用url传到action

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中文乱码用url传到action