比较String 字符串的字节大小

package com.ittx.edi.erp;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class test001 {

    public static void main(String[] args) {
        try {
            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.append("你");

            while (stringBuilder.toString().getBytes("utf-8").length < 4194304){ //比较字节是否小于4M
                System.out.println(stringBuilder.toString().getBytes("utf-8").length);
                stringBuilder.append("你你你你你你你");
            }

            generateNewText("C:\\temp.txt", stringBuilder.toString());
        }catch (Exception ex){

        }

    }

    public static File generateNewText(String filePath, String content) {
        try {
            File file = new File(filePath);
            if (!file.exists()) {
                file.createNewFile();
            }
            FileWriter fileWriter = new FileWriter(file);
            fileWriter.write(content);
            fileWriter.close();
            return file;
        } catch (Exception ex) {
            return null;
        }

    }

}