Java不可見字符處理
阿新 • • 發佈:2017-06-12
pos java -128 true joiner for col 博客 兩個
逛博客園的時候,看到一篇文章,比較兩個字符串是否相等,比較兩個字符串,用了一個晚上.
string m1 = "fa?c5?04?6b?c1?0a?ca?2e?1e?a9?55?eb?e4?53?7d?c0";
string m2 = "fac5046bc10aca2e1ea955ebe4537dc0";
是不相等的。因為m1裏面含有不可見字符(zero-width non-joiner (ZWNJ),zero-width space (ZWSP) 這兩種)
解決辦法:
①.復制到QQ裏,就可以看到區別了。
②.用Java代碼來區別
1 String m1 = "fa?c5?04?6b?c1?0a?ca?2e?1e?a9?55?eb?e4?53?7d?c0"; 2 String m2 = "fac5046bc10aca2e1ea955ebe4537dc0"; 3 System.out.println("m1的長度:"+m1.length() + "\n" +"m2的長度:" + m2.length());4 byte[] bs = m1.getBytes(); 5 System.out.print("m1:"); 6 for (byte b : bs) { 7 System.out.print(b + " "); 8 } 9 System.out.println(); 10 String all = m1.replaceAll("\\p{C}", ""); 11 System.out.println(m2.equals(all));
得到輸出結果:
m1的長度:62 m2的長度:32 m1:102 97 -30 -128 -116 -30 -128 -117 99 53 -30 -128 -116 -30 -128 -117 48 52 -30 -128 -116 -30 -128 -117 54 98 -30 -128 -116 -30 -128 -117 99 49-30 -128 -116 -30 -128 -117 48 97 -30 -128 -116 -30 -128 -117 99 97 -30 -128 -116 -30 -128 -117 50 101 -30 -128 -116 -30 -128 -117 49 101 -30 -128
-116 -30 -128 -117 97 57 -30 -128 -116 -30 -128 -117 53 53 -30 -128 -116 -30 -128 -117 101 98 -30 -128 -116 -30 -128 -117 101 52 -30 -128 -116 -30
-128 -117 53 51 -30 -128 -116 -30 -128 -117 55 100 -30 -128 -116 -30 -128 -117 99 48 true
Java不可見字符處理