String.split

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分割字符串碰到了一些疑问，在此整理一下。

1.使用特殊字符“.”或”|“分割时需要转译

1.不使用反斜杠转义，使用“.”进行分割没有结果

  /**     * result: empty     */    public static void splitDotWithoutBackSlash() {        String testString = "hello.world";        String[] splitArray = testString.split(".");        for (int i = 0; i < splitArray.length; i++) {            String s = splitArray[i];            System.out.print("  " + s);        }    }   /**     * result: hello world     */    public static void splitDotWithBackSlash() {        String testString = "hello.world";        final String[] splitArray = testString.split("\\.");        for (int i = 0; i < splitArray.length; i++) {            String s = splitArray[i];            System.out.print("  " + s);        }    }

1.不使用反斜杠转义，使用“|”进行分割会可能会出现奇葩结果

/**     * result: h  e  l  l  o  |  w  o  r  l  d     */    public static void splitDotWithoutBackSlash() {        String testString = "hello|world";        String[] splitArray = testString.split("|");        for (int i = 0; i < splitArray.length; i++) {            String s = splitArray[i];            System.out.print("  " + s);        }    }    /**     * result: hello  world     */    public static void splitDotWithBackSlash() {        String testString = "hello|world";        final String[] splitArray = testString.split("\\|");        for (int i = 0; i < splitArray.length; i++) {            String s = splitArray[i];            System.out.print("  " + s);        }    }

2.最简单的分割样式

1.将所有符合条件的字符串都进行分解

  /**     * result:      * I     * love     * my     * home     */    public static void splitBlank() {        String testString = "I love my home";        String[] splitArray = testString.split(" ");        for (int i = 0; i < splitArray.length; i++) {            String s = splitArray[i];            System.out.println("  " + s);        }    }

2.限制分解的结果集的个数，最后一组会囊括剩余部分

 /**     * result:      * I     * love     * my home     */    public static void splitBlankLimitNum() {        String testString = "I love my home";        String[] splitArray = testString.split(" ", 3);        for (int i = 0; i < splitArray.length; i++) {            String s = splitArray[i];            System.out.println("  " + s);        }    }

3.使用正则表达式，对字符串进行分割

   /**     * result: I  love  my  home     */    public static void splitRegular() {        String testString = "I,love.my'home";        String[] splitArray = testString.split("[^a-zA-Z0-9]");        for (int i = 0; i < splitArray.length; i++) {            String s = splitArray[i];            System.out.print("  " + s);        }    }

参考地址

http://www.360doc.com/content/13/0728/19/13247663_303185497.shtml
http://juck.iteye.com/blog/1541247

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