我开发基于 eclipse3.2+j2ee5.0 +tomcat5.09+mysql5.0

一、表单POST的数据的中文乱码解决

　　这类型的数据中文可以通过filters来实时过滤。filters代码如下：

package filters;

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.UnavailableException;

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 ...{

　// 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);

}

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);
}

}

　　filters配置（配置web.xml）：

＜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＞