javaWeb的字符乱码解决方法

工具类；

public class Chchar {

public   static   String   toChinese(String   strvalue)  
     {  
                 try{  
                         if(strvalue==null)  
                               return   null;  
                          
                            strvalue   =   new   String(strvalue.getBytes("ISO8859_1"),   "gb2312");  
                            return   strvalue;  
              
                 }catch(Exception   e){  
                             return   null;  
                 }  
     }  

}


第二：过滤器


public class SetCharacterEncodingFilter implements Filter {

public void destroy() {

}

public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
//System.out.println("设置request的编码为gb2312");
arg0.setCharacterEncoding("gb2312");
arg2.doFilter(arg0, arg1);


}

public void init(FilterConfig arg0) throws ServletException {

}

}
在web.xml的配置
<filter> 
        <filter-name>Encoding</filter-name> 
        <filter-class> 
         SetCharacterEncodingFilter 
        </filter-class> 
      
    </filter> 
    <filter-mapping> 
        <filter-name>Encoding</filter-name> 
        <url-pattern>*.do</url-pattern> 
    </filter-mapping>



Ajax调html的乱码问题；


  因为Ajax默认采用utf-8字符集。在默认情况下html必须是utf-8的。

   在生成html是用utf8。并在html中指明utf8
 
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />