java get方式中文乱码

get方式提交的参数编码，只支持iso8859-1编码。

输入参数是中文，输出结果有乱码。

hello?userName=北京

北京, 你好!

如果里面有中文，在后台就需要转换编码，如下

String name = request.getParameter("userName");

name = new String(name.getBytes("iso8859-1"),"utf-8");

再次输出结果OK。

北京, 你好!

public class HelloServlet extends HttpServlet {protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {//模拟网络延迟try {Thread.sleep(3000);} catch (InterruptedException e) {e.printStackTrace();}//接收请求参数<span style="color:#ff0000;">request.setCharacterEncoding("utf-8");String name = request.getParameter("userName");name = new String(name.getBytes("iso8859-1"),"utf-8");</span>System.out.println(name);//作出响应<span style="color:#ff0000;">response.setContentType("text/html;charset=utf-8");</span>PrintWriter out = response.getWriter();out.println(name + ", 你好! ");out.close();}}