post請求的中文亂碼問題

post請求的中文亂碼問題

設置請求體的字符集為UTF-8，從而解決post請求的中文亂碼問題
req.setCharacterEncoding("UTF-8");

這段語句必須在獲取請求參數之前調用才有效，如果你先獲取了密碼的參數，再設置字符集，然后再獲取用戶名的參數，那么用戶名的參數也會亂碼的。

package LWB;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;

public class ParameterServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("----------------doGet---------------");
        String username=req.getParameter("username");
        String password=req.getParameter("password");
        String[] hobby=req.getParameterValues("hobby");
        System.out.println("用戶名："+username);
        System.out.println("密碼："+password);
        System.out.println("興趣愛好："+ Arrays.asList(hobby));
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//      設置請求體的字符集為UTF-8，從而解決post請求的中文亂碼問題
        req.setCharacterEncoding("UTF-8");
        System.out.println("----------------doPost---------------");
        String username=req.getParameter("username");
        String password=req.getParameter("password");
        String[] hobby=req.getParameterValues("hobby");
        System.out.println("用戶名："+username);
        System.out.println("密碼："+password);
        System.out.println("興趣愛好："+ Arrays.asList(hobby));
    }
}