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public String[] split(String regex)
Splits this string around matches of the given regular expression. 
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regular-expressionµÄÆ¥Åäģʽ¶ø²»ÊÇÒ»¸ö¼òµ¥µÄString£¬Ëû¶ÔÒ»Ð©ÌØÊâµÄ×Ö·û¿ÉÄÜ»á³öÏÖÄãÔ¤Ïë²»µ½µÄ½á¹û£¬±ÈÈç²âÊÔÏÂÃæµÄ´úÂ룺
  
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    String[] aa = "aaa|bbb|ccc".split("|");
   
//String[] aa = "aaa|bbb|ccc".split("\\|"); ÕâÑù²ÅÄܵõ½ÕýÈ·µÄ½á¹û
    for (int i = 0 ;
i <aa.length ; i++ ) {
      System.out.println("--"+aa[i]);
    }
   ÓÃÊú * ·Ö¸ô×Ö·û´®ÔËÐн«Å׳öjava.util.regex.PatternSyntaxExceptionÒì³££¬ÓüӺŠ+ Ò²ÊÇÈç´Ë¡£
    String[] aa = "aaa*bbb*ccc".split("*");
    //String[] aa =
"aaa|bbb|ccc".split("\\*"); ÕâÑù²ÅÄܵõ½ÕýÈ·µÄ½á¹û   
    for (int i = 0 ; i
<aa.length ; i++ ) {
      System.out.println("--"+aa[i]);
    }
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   "|"
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   String[] aa = "aaa\\bbb\\bccc".split("\\\\"); 
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