1. java類： CharacterEncodingFilter
   import javax.servlet.*;
   import java.io.IOException;

   public class CharacterEncodingFilter implements Filter {

   private String encoding = “UTF-8”;
   private boolean forceEncoding = true;

   /**

   • Set the encoding to use for requests. This encoding will be
   • passed into a ServletRequest.setCharacterEncoding call.

   • Whether this encoding will override existing request

   • encodings depends on the “forceEncoding” flag.
     */
     public void setEncoding(String encoding) {
     this.encoding = encoding;
     }

   /**

   • Set whether the encoding of this filter should override existing
   • request encodings. Default is “false”, i.e. do not modify encoding
   • if ServletRequest.getCharacterEncoding returns a non-null value.
     */
     public void setForceEncoding(boolean forceEncoding) {
     this.forceEncoding = forceEncoding;
     }

   public void init(FilterConfig filterConfig) throws ServletException {
   this.encoding = filterConfig.getInitParameter(“encoding”);
   String force = filterConfig.getInitParameter(“forceEncoding”);
   this.forceEncoding = (force == null) || Boolean.valueOf(force).booleanValue() ;
   }

   public void doFilter(ServletRequest servletRequest,
   ServletResponse servletResponse,
   FilterChain filterChain) throws IOException, ServletException {
   if (this.forceEncoding || servletRequest.getCharacterEncoding() == null) {
   servletRequest.setCharacterEncoding(this.encoding);
   }
   filterChain.doFilter(servletRequest, servletResponse);
   }

   public void destroy() {

   }

}

1. 在web.xml配置檔案里加Filters Configurations
   
   
   CHARACTER_ENCODING
   
   common.encoding.CharacterEncodingFilter
   
   encoding
   UTF-8
   
   
   forceEncoding
   true
   
   
   
   CHARACTER_ENCODING
   /*
   

3.資料庫建立為UTF-8格式
4.專案右鍵屬性為UTF-8格式
5.所有頁面申明為UTF-8
6.JDBC URL設為：UTF-8
jdbc:mysql://localhost:3306/databaseuse?useUnicode=true&characterEncoding=utf-8
7.資料庫Driver選擇UTF-8格式
8.Tomcat編碼改成UTF-8

在server.xml裡面增加URIEncoding=”UTF-8”