HttpServletRequest转string

可以使用以下代码将HttpServletRequest对象转换为字符串：

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.IOUtils;

public class RequestUtils {
  public static String convertToString(HttpServletRequest request) throws IOException {
    StringBuilder sb = new StringBuilder();
    sb.append(request.getMethod()).append(" ").append(request.getRequestURI());
    
    String queryString = request.getQueryString();
    if (queryString != null) {
      sb.append("?").append(queryString);
    }
    
    sb.append("\n");
    
    // Append headers
    Enumeration<String> headerNames = request.getHeaderNames();
    while (headerNames.hasMoreElements()) {
      String headerName = headerNames.nextElement();
      String headerValue = request.getHeader(headerName);
      sb.append(headerName).append(": ").append(headerValue).append("\n");
    }
    
    sb.append("\n");
    
    // Append body
    String requestBody = IOUtils.toString(request.getInputStream(), request.getCharacterEncoding());
    sb.append(requestBody);
    
    return sb.toString();
  }
  
  // Example usage
  public void exampleUsage(HttpServletRequest request, HttpServletResponse response) throws IOException {
    String requestString = convertToString(request);
    
    PrintWriter out = response.getWriter();
    out.println(requestString);
  }
}