import
import
import
import
import
import
import
import java.util.UUID;

public class Demo3 {
    public static void main(String[] args) throws IOException {
        OutputStreamWriter osw = new OutputStreamWriter(
                new FileOutputStream("E:/xiao.txt"),"UTF-8");
        for(int i=0;i<100;i++){
        String str = UUID.randomUUID().toString();
        osw.write(str);
        }
        osw.close();
        InputStreamReader isr = new InputStreamReader(new FileInputStream("E:/xiao.txt"),"UTF-8");
        char c;
        while((c=(char)isr.read())!=-1){
            c = (char)isr.read();
            System.out.print(c);
        }
        isr.close();
    }
}





显示的结果是这样的：6749dbc5-abc8-40b1-b99f-01c7978053e4307814c2-fe32-4ae8-8db5-2ed7cfefd1e124548e18-ce25-4e5f-8d15-5e5ece28f0642ccc250a-6684-4b8d-a93c-a538c4966451fb9f7833-54c6-4541-968d-1a7f53c3b8718f6cda95-9708-4c9d-84f0-decddfe938a78e41dda0-4f2b-4c4b-b511-d48ae240f2ec8f71448d-09b8-47f9-9e42-376cb977027712f47930-33fe-4500-b151-1e75bf9e0f3428496e5f-952c-494b-9f6d-fddcee41a4bedc1e4323-c371-41c6-ba64-148edf1ac82b1341b9af-1845-49d0-9f77-13a15717e0e83f513a67-5282-4f98-bc37-e2376ac61624540a43f2-f024-41b2-865f-996a09b5f53affb25899-0d5a-498b-82e2-e8e8fe7b32bde88365ae-9381-4494-b1c4-3d877fdc53fb538ddb0b-2107-4b21-9908-eb6f4eaec60e75faa2f9-0c07-48dc-b562-e0381485587d64080281-3283-4c58-b9e1-4c75cd22da0d5bb5b370-13b9-4f1f-823d-4ee368eea6c9d6647d1a-11d7-4ad2-9547-02ecdedc4b1dd86771ed-a91f-4389-bf23-1478b9ece4cdb88d5c9b-9a9b-4838-ad63-98ac7588a5e20591224b-719d-4385-902b-b0fc50dd16d0e3f221f6-8d31-450a-838c-.....................

你是想要什么样的输出结果呢

就是想要输出正常的字符吧！不要这样的，好乱！

String str = UUID.randomUUID().toString();
在这局下面加个换行符号就行了

你想要什么样的输出结果呢？你要清楚UUID的作用，它就是要随机生成36位的字符串，来防止重复，如果嫌不好看，可以用println换行的

噢，这样的哈！

晕，学习了！