[Java知识库]Java Web重定向参数中文乱码问题解决

在重定向代码之前，将参数值用以下代码编码一下即可。

message = URLEncoder.encode(message, "UTF-8");

代码如下：

@WebServlet(urlPatterns = "/check")
public class CheckServler extends HttpServlet{

	@Override
	public void doGet(HttpServletRequest request, HttpServletResponse response) 
			throws ServletException, IOException {

		String username = request.getParameter("username");		
		String message = null;
		
		if(username == null) {
			message = "Please input username.";
		}else {
			message = "Hello, " + username; 
		}

		message = URLEncoder.encode(message, "UTF-8");
		response.sendRedirect("/helloapp/output?msg="+message);		

	}
}


@WebServlet(urlPatterns = "/output")
public class OutputServlet extends HttpServlet {

	@Override
	public void doGet(HttpServletRequest request, HttpServletResponse response) 
			throws ServletException, IOException {

		response.setContentType("text/plain; charset=UTF-8");
		
		String msgString = request.getParameter("msg");
		
		PrintWriter outPrintWriter = response.getWriter();
		outPrintWriter.println(msgString);
		outPrintWriter.close();		
	}

}