如何正确解码传递给servlet的unicode参数

String unicodeParam = request.getParameter("unicodeParam");

String decodedParam = URLDecoder.decode(unicodeParam, StandardCharsets.UTF_8);

String decodedParam = URLDecoder.decode(unicodeParam, StandardCharsets.UTF_8);

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;

@WebServlet("/DecodeUnicodeParam")
public class DecodeUnicodeParamServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取请求参数
        String unicodeParam = request.getParameter("unicodeParam");

        // 将unicode编码转换为字符串
        String decodedParam = URLDecoder.decode(unicodeParam, StandardCharsets.UTF_8);

        // 设置响应内容类型和字符集
        response.setContentType("text/plain;charset=UTF-8");

        // 输出解码后的字符串
        PrintWriter out = response.getWriter();
        out.println("解码后的字符串：" + decodedParam);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}