将2D数组写入字符串,然后写入.txt文件-Java



我有一个方法调用第二个方法,第二个将是:

  • 创建任何丢失的目录
  • 创建文件
  • 将2D字符串[]解码为字符串(无效)
  • 写入内容
  • 将解码后的字符串写入带有头的文件(无效)

第一种方法

public static boolean store(Exception exception, String[][] flags){
    return storePrivate(exception, location, flags);
}

第二种方法(不是所有代码,只是相关代码)

private static boolean storePrivate(Exception exception, String dir, String[][] flags){
    String flag = "";
    for(int i = 0; i >= flags.length; i++){
        flag = flag + "" +  flags[i][0] + ": " + flags[i][1] + "n";
    }
    try {
        File directory = new File(dir);
        File file = new File(dir + id + ".txt");
        if (!directory.exists()) {
            directory.mkdirs(); 
        }
        file.createNewFile();
        FileWriter filewriter = new FileWriter(file.getAbsoluteFile());
        BufferedWriter writer = new BufferedWriter(filewriter);

        if(flag != ""){
            writer.write("Flags by Developer: ");
            writer.write(flag);
        }   
        writer.flush();
        writer.close();
        return true;
    } catch (IOException e) {
        return false;
    }
}

调用第一个方法

public static void main(String[] args) {
    try {
        test();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        ExceptionAPI.store(e, new String[][]{{"flag1", "Should be part of flag1"}, {"flag2", "this should be flag 2 contence"}});
    }
}
public static void test() throws IOException{
    throw new IOException();
}

我不明白为什么这不起作用。我认为这与第二种方法有关,特别是

if(flag != ""){
    writer.write("Flags by Developer: ");
    writer.write(flag);
}  

如果有人能帮我的话,谢谢。

卷曲

如果您只想将字符串数组转换为单个字符串,请尝试以下操作:

    String[] stringTwoD = //... I think this is a 1D array, and Sting[][] is a 2D, anyway
    String stringOneD = "";
    for (String s : stringTwoD) 
        stringOneD += s;//add the string with the format you want

顺便说一句,你的循环条件似乎是错误的,所以你可以把它改为:

for(int i = 0; i < flags.length; i++){
    flag += flags[i][0] + ": " + flags[i][1] + "n";
}

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