用java格式化字符串

我想将状态消息打印到控制台中

   System.out.format("%-60s%10s\n", "Status 1", "[Success]");
            System.out.format("%-60s%10s\n", "Status 2", "[Failed]");
            System.out.format("%-60s%10s\n", "Status 2", "[Failed]");
            System.out.format("%-60s%10s\n", "Status 2 and some text", "[Failed]");
            System.out.format("%-60s%10s\n", "Status 2", "[Failed]");
            System.out.format("%-60s%10s\n", "Status 2", "[Success]");
            System.out.format("%-60s%10s\n", "Status 2 and some very long text", "[Failed]");
            System.out.format("%-60s%10s\n", "Status 2", "[Success]");
            System.out.format("%-60s%10s\n", "Status 2 and some very very very long text", "[Failed]");
            System.out.format("%-60s%10s\n", "Status 2", "[Success]");
            System.out.format("%-60s%10s\n", "Status 2", "[Failed]");

但正如您所看到的，第二列消息的格式不正确

Status 1                                                     [Success]
Status 2                                                      [Failed]
Status 2                                                      [Failed]
Status 2 and some text                                        [Failed]
Status 2                                                      [Failed]
Status 2                                                     [Success]
Status 2 and some very long text                              [Failed]
Status 2                                                     [Success]
Status 2 and some very very very long text                    [Failed]
Status 2                                                     [Success]
Status 2                                                      [Failed]

我想这样打印邮件：

Status 1                                                      [Success]
Status 2                                                      [Failed]
Status 2                                                      [Failed]
Status 2 and some text                                        [Failed]
Status 2                                                      [Failed]
Status 2                                                      [Success]
Status 2 and some very long text                              [Failed]
Status 2                                                      [Success]
Status 2 and some very very very long text                    [Failed]
Status 2                                                      [Success]
Status 2                                                      [Failed]

我如何做到这一点？

为什么不添加

“-”

，使最后一个字段左对齐，作为第一个字段？我想，

“%-60s%-10s\n”

可以用。

你可以试试这个代码

  System.out.format("%-60s%.10s\n", "Status 1", "[Success]");
    System.out.format("%-60s%.10s\n", "Status 2", "[Failed]");
    System.out.format("%-60s%.10s\n", "Status 2", "[Failed]");
    System.out.format("%-60s%.10s\n", "Status 2 and some text", "[Failed]");
    System.out.format("%-60s%.10s\n", "Status 2", "[Failed]");
    System.out.format("%-60s%.10s\n", "Status 2", "[Success]");
    System.out.format("%-60s%.10s\n", "Status 2 and some very long text", "[Failed]");
    System.out.format("%-60s%.10s\n", "Status 2", "[Success]");
    System.out.format("%-60s%.10s\n", "Status 2 and some very very very long text", "[Failed]");
    System.out.format("%-60s%.10s\n", "Status 2", "[Success]");
    System.out.format("%-60s%.10s\n", "Status 2", "[Failed]");

---

作为旁注：最好在格式字符串中使用

%n

而不是

\n

，这样您就可以得到适合平台的换行序列。

%.10s

将允许您从传递的字符串中最多打印10个字符，所以可能更好的方法是删除

.10

并使用简单的

%s

。但如果OP希望在

Success/Failed

列之后添加一些其他信息，最好确保此列具有固定的大小。如果我们想打印左对齐的字符串值，我们应该在列长度之前添加

-

。