如何在Java Servlet中接收大型字符串？

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        StringBuilder stringBuilder = new StringBuilder();
        BufferedReader bufferedReader = null;
        
        try {
            bufferedReader = new BufferedReader(new InputStreamReader(request.getInputStream()));
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                stringBuilder.append(line);
            }
        } finally {
            if (bufferedReader != null) {
                bufferedReader.close();
            }
        }
        
        String receivedString = stringBuilder.toString();
        // 对接收到的字符串进行处理或其他操作
    }
}