您好，如何在新响应中设置java中的内容

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class YourClass {
    public void yourMethod(HttpServletResponse response) throws IOException {
        response.setContentType("text/plain");
        response.setCharacterEncoding("UTF-8");
        response.setHeader("headerName", "headerValue");

        PrintWriter writer = response.getWriter();
        writer.write("Hello, World!");
        writer.flush();
        writer.close();
    }
}