struts中乱码问题

  方法一导入spring包.再web.xml里配置相关的信息
<filter>
   <filter-name>encodingFilter</filter-name>
   <filter-class>
    org.springframework.web.filter.CharacterEncodingFilter
   </filter-class>
   <init-param>
    <param-name>encoding</param-name>
    <param-value>UTF-8</param-value>
   </init-param>
</filter>
<filter-mapping>
   <filter-name>encodingFilter</filter-name>
   <url-pattern>*.do</url-pattern>
</filter-mapping>
<filter-mapping>
   <filter-name>encodingFilter</filter-name>
   <url-pattern>*.jsp</url-pattern>
</filter-mapping>

方法二
再web.xml配置信息
<filter>
<filter-name>Character</filter-name>
<filter-class>
com.ssh.common.SetCharacterEncodingFilter
</filter-class>
<init-param>
<param-name>ignore</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
  <filter-name>Character</filter-name>
  <url-pattern>*.do</url-pattern>
</filter-mapping>
<filter-mapping>
  <filter-name>Character</filter-name>
  <url-pattern>*.html</url-pattern>
</filter-mapping>
<filter-mapping>
  <filter-name>Character</filter-name>
  <url-pattern>*.jsp</url-pattern>
</filter-mapping>

package com.ssh.common;

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.http.HttpServletResponse;

public class SetCharacterEncodingFilter implements Filter{
  protected String encoding = null;
  protected FilterConfig filterConfig = null;
  protected boolean ignore = true;

  public void destroy()
  {
    this.encoding = null;
    this.filterConfig = null;
  }

  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
  {
    HttpServletResponse httpResponse = (HttpServletResponse)response;
    httpResponse.setHeader("Pragma", "no-cache");
    httpResponse.setHeader("Cache-Control", "no-cache");
    httpResponse.setDateHeader("Expires", 8248187587605299200L);

    if ((this.ignore) || (request.getCharacterEncoding() == null)) {
      String encoding = selectEncoding(request);
      if (encoding != null)
        request.setCharacterEncoding(encoding);
    }

    chain.doFilter(request, response);
  }

  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 String selectEncoding(ServletRequest request)
  {
    return this.encoding;
  }

}