struts2怎样可以解决乱码问题（比如怎么写个过滤器）？

Question

   struts2怎样可以解决乱码问题（比如怎么写个过滤器）

Answer 1

<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>
...CharacterEncodingFilter </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>
放在web.xml里，红色根据自己需求写，那个过滤类有开源包

Answer 2

你可以先写一个过虑类 
package com.database;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 SetCharacterEncodingFilter implements Filter {
public void destroy() {
// TODO Auto-generated method stub

} public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
arg0.setCharacterEncoding("GBK");
arg2.doFilter(arg0,arg1);
} public void init(FilterConfig arg0) throws ServletException { }
 
}
然后在Web.xml中配制
<filter>
   <filter-name>encodingFilter</filter-name>
   <filter-class>com.database.SetCharacterEncodingFilter</filter-class>
  </filter>
  <filter-mapping>
   <filter-name>encodingFilter</filter-name>
   <url-pattern>/*</url-pattern>
  </filter-mapping>
如果这样不行我在给你写段例子；
String lname=new String(request.getParameter("name").getBytes("ISO-8859-1"),"GB2312");
这样应该没问题
看的懂吗？

Answer 3

楼上的代码限制得太死，给你个可以在web.xml配置字符集的过滤器：
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添加这样的代码：<filter>
        <filter-name>Set Character Encoding</filter-name>
        <filter-class>filters.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>

Answer 4

楼上的过滤器我瞅着可真眼熟
http://topic.csdn.net/u/20071122/11/87bbcbc6-949a-48cc-981b-3b3094fed3cc.html

Answer 5

struts2中所有文件都用UTF-8编码，使用struts2自带的filter，就不会出现乱码。 <filter>
<filter-name>struts-cleanup</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ActionContextCleanUp
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts-cleanup</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

Answer 6

package com.smcc.uer.web.actions;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class SysRequestProcessor
extends org.apache.struts.action.RequestProcessor {

/**
 * 设置输入输出字符集
 */
protected boolean processPreprocess(HttpServletRequest request,HttpServletResponse response) {

try {
request.setCharacterEncoding("GBK");
response.setContentType("text/html;charset=GBK");
}
catch (Exception e) {

}

return true;

} }
struts-config里面的配置：<controller
  contentType="text/html;charset=GBK"
  locale="true"
  nocache="true"
  processorClass="com.smcc.uer.web.actions.SysRequestProcessor"/>

Answer 7

在struts.xml中配置一下属性
struts.i18n.encoding=UTF-8

Answer 8

在struts.xml中配置
<constant name="struts.i18n.encoding value="GBK"/>

Answer 9

STRUTS2还是通过SERVLET来过滤挖?

Answer 10

public class CharacterEncodingFilter extends HttpServlet implements Filter {
    private FilterConfig filterConfig;
    //Handle the passed-in FilterConfig
    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
    }    //Process the request/response pair
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain filterChain) {
        try {
            //request.setCharacterEncoding("GBK");
            //response.setCharacterEncoding("GBK");
            request.setCharacterEncoding("utf-8");
            response.setCharacterEncoding("utf-8");
            filterChain.doFilter(request, response);
        } catch (ServletException sx) {
            filterConfig.getServletContext().log(sx.getMessage());
        } catch (IOException iox) {
            filterConfig.getServletContext().log(iox.getMessage());
        }
    }    //Clean up resources
    public void destroy() {
    }
}

Answer 11

 <filter>
    <filter-name>characterencodingfilter</filter-name>
    <filter-class>Filter.CharacterEncodingFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>characterencodingfilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

Answer 12

 楼上的兄的，在web.xml配置自己的过滤器（关于转码），那struts2自带的过滤器就用不了，有没有即用strust自带过滤器又用自己自配的过滤器吗？？。

Answer 13

楼上说Servlet的骚年们,看清楚楼主说的是struts2啊 拜托,还什么dofilter?专业点行不行