使用java动态创建html页面，为什么无法读取这个文件？

package com.abbott.common.utils;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
public class HtmlUtil {
    public static void exportHtml() {
        //用于存储html字符串
 StringBuilder stringHtml = new StringBuilder();
 try {
            //打开文件
 PrintStream printStream = new PrintStream(new FileOutputStream("./Data/test.html"));
 //输入HTML文件内容
 stringHtml.append("<html><head>");
 stringHtml.append("<meta http-equiv="Content-Type" content="text/html; charset=GBK">");
 stringHtml.append("<title>测试报告文档</title>");
 stringHtml.append("</head>");
 stringHtml.append("<body>");
 stringHtml.append("<div>hello</div>");
 stringHtml.append("</body></html>");
 try{
                //将HTML文件内容写入文件中
 printStream.println(stringHtml.toString());
 }catch (Exception e) {
                e.printStackTrace();
 }
        } catch(FileNotFoundException e){
            e.printStackTrace();
 }
    }
    public static void main(String[] args) {
        HtmlUtil.exportHtml();
 }
}