一般情况下，进行以下两步处理就可以解决中文乱码问题。

第一步，添加Filter过滤器，Filter代码如下所示：

package servlet;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;public class SetCharacterEncodingFilter implements Filter {	protected String encoding = null; 	public void destroy() {		// TODO Auto-generated method stub	}	public void doFilter(ServletRequest request, ServletResponse response,			FilterChain chain) throws IOException, ServletException {				request.setCharacterEncoding(encoding);		response.setContentType("text/html;charset="+encoding);		chain.doFilter(request, response);	}	public void init(FilterConfig filterConfig) throws ServletException {		 this.encoding = filterConfig.getInitParameter("encoding");	}}

第二步，配置tomcat的server.xml文件的uriEncoding属性