使用过滤器，处理中文显示乱码，并且在插入到mysql数据库的中文数据不为乱码
先新建一个Servlet要求extendsHttpServletimplementsFilter
packagecom.huangshan.filt;
importjava.io.IOException;
importjava.io.PrintWriter;
importjavax.servlet.Filter;
importjavax.servlet.FilterChain;
importjavax.servlet.FilterConfig;
importjavax.servlet.ServletException;
importjavax.servlet.ServletRequest;
importjavax.servlet.ServletResponse;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
publicclassmyfiltextendsHttpServletimplementsFilter{
/**
*ThedoGetmethodoftheservlet.<br>
*
*Thismethodiscalledwhenaformhasitstagvaluemethodequalstoget.
*
*@paramrequesttherequestsendbytheclienttotheserver
*@paramresponsetheresponsesendbytheservertotheclient
*@throwsServletExceptionifanerroroccurred
*@throwsIOExceptionifanerroroccurred
*/
publicvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)
throwsServletException,IOException{
response.setContentType("text/html");
PrintWriterout=response.getWriter();
out
.println("<!DOCTYPEHTMLPUBLIC\"-//W3C//DTDHTML4.01Transitional//EN\">");
out.println("<HTML>");
out.println("<HEAD><TITLE>AServlet</TITLE></HEAD>");
out.println("<BODY>");
out.print("Thisis");
out.print(this.getClass());
out.println(",usingtheGETmethod");
out.println("</BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
*ThedoPostmethodoftheservlet.<br>
*
*Thismethodiscalledwhenaformhasitstagvaluemethodequalstopost.
*
*@paramrequesttherequestsendbytheclienttotheserver
*@paramresponsetheresponsesendbytheservertotheclient
*@throwsServletExceptionifanerroroccurred
*@throwsIOExceptionifanerroroccurred
*/
publicvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)
throwsServletException,IOException{
response.setContentType("text/html");
PrintWriterout=response.getWriter();
out
.println("<!DOCTYPEHTMLPUBLIC\"-//W3C//DTDHTML4.01Transitional//EN\">");
out.println("<HTML>");
out.println("<HEAD><TITLE>AServlet</TITLE></HEAD>");
out.println("<BODY>");
out.print("Thisis");
out.print(this.getClass());
out.println(",usingthePOSTmethod");
out.println("</BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
publicvoiddoFilter(ServletRequestarg0,ServletResponsearg1,FilterChainarg2)throwsIOException,ServletException{
//TODO自动生成方法存根
//处理中文乱码问题
arg0.setCharacterEncoding("gbk");
//程序继续前进
arg2.doFilter(arg0,arg1);
}
publicvoidinit(FilterConfigarg0)throwsServletException{
//TODO自动生成方法存根
}
}
完成以上操作以后再修改web.xml在中间加入以下代码
<filter>
<filter-name>myfilt</filter-name>
<filter-class>com.huangshan.filt.myfilt</filter-class>
</filter>
<filter-mapping>
<filter-name>myfilt</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
myfilt:建立Servlet的类名称
com.huangshan.filt.myfilt：类的路径
别的就不需要修改了