例jsp中傳入的引數名字：shortname

情況（1）：和方法2針對的情況一樣 如果是第3種情況的話就不適用了

                     java後臺程式碼這樣處理   String str = new String(shortname.getBytes("iso-8859-1"),"UTF-8") ; 不需要對jsp頁面的引數編碼

情況（2）針對使用Ajax get請求時引數不附加在url後：如 $.ajax{type:get,data:shortname:shortname......  }

                 jsp頁面引數這樣處理 encodeURIComponent(shortname)

          java後臺程式碼這樣處理    String str = URLDecoder.decode(shortname, "utf-8");

情況（3）get 提交針對於引數附加在url後面:如：url:/ajax/a.action?shortname=shortname

                     jsp頁面引數這樣處理 encodeURI((encodeURI(shortname)))    這樣也可以encodeURI(shortname)  。。。。。

                    java後臺程式碼這樣處理  String str = URLDecoder.decode(shortname, "utf-8");

針對第2和第3種情況  如果前臺還需要這個引數shortname  一直在前後臺傳來傳去的話，要注意下 後臺傳到前臺時也要對這個引數shortname進行編碼：

URLEncoder.encode(URLEncoder.encode(shortname, "utf-8"), "utf-8")  還有就是情況2,3避免亂碼，可以改用post請求！

不過感覺最簡單的方法還是用過濾器了:過濾器類如下

package zz;


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;

/**
 * Filter that sets the character encoding to be used in parsing the
 * incoming request
 */
public class SetCharacterEncodingFilter implements Filter {
	protected String encoding = null;
    protected FilterConfig filterConfig = null;
    public void destroy() {}
    public void init(FilterConfig filterConfig) throws ServletException {
    	this.filterConfig = filterConfig;
        this.encoding = filterConfig.getInitParameter("encoding");
    }
    /**
     * Select and set(if specified) the character encoding to be used to
     * interpret request parameters for this request
     */
    public void doFilter(ServletRequest request,ServletResponse response,
                          FilterChain chain) throws IOException,ServletException {
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        
        chain.doFilter(request,response);
    }
}
 

<filter>
    <filter-name>SetCharacterEncoding</filter-name>
    <filter-class>com.bigdata.financial.filter.SetCharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  
  <filter-mapping>
    <filter-name>SetCharacterEncoding</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>