common-langs StringUtils一些用法

@RunWith(JUnit4.class)
public class TestStringUtils {
    private Logger log = LoggerFactory.getLogger(TestStringUtils.class);
    /*判断空*/
    @Test
    public void testEmpty(){
        log.info(StringUtils.isEmpty("aa") + "");
        log.info(StringUtils.isEmpty("") + "");
        log.info(StringUtils.isEmpty(" ") + "");
        log.info(StringUtils.isEmpty("/n") + "");
        log.info(StringUtils.isEmpty(null) + "");
    }
    /*判断空白*/
    @Test
    public void testBlank(){
        log.info(StringUtils.isBlank("aa") + "");
        log.info(StringUtils.isBlank("") + "");
        log.info(StringUtils.isBlank(" ") + "");
        log.info(StringUtils.isBlank("/r") + "");
        log.info(StringUtils.isBlank(null) + "");
    }
    /*去除前导后导空白*/
    @Test
    public void testStrim(){
        log.info(StringUtils.trim("aa") );
        log.info(StringUtils.trim("  aa "));
        log.info(StringUtils.trim(" ") );
        log.info(StringUtils.trim("/r weg weg  "));
    }
    /*去除前导后导空白,变为null或""返回Null*/
    @Test
    public void testStrimToNull(){
        log.info(StringUtils.trimToNull("aa") );
        log.info(StringUtils.trimToNull("  aa "));
        log.info(StringUtils.trimToNull(" ") );
        log.info(StringUtils.trimToNull("/r weg weg  "));
    }
    /*去除前导后导空白,变为null或""返回""*/
    @Test
    public void testStrimToEmpty(){
        log.info(StringUtils.trimToEmpty("aa") );
        log.info(StringUtils.trimToEmpty("  aa "));
        log.info(StringUtils.trimToEmpty(" ") );
        log.info(StringUtils.trimToEmpty("/b weg weg  "));
    }
    /*去除两端空白，不包含制表符*/
    @Test
    public void testStrip(){
        log.info(StringUtils.strip("aa") );
        log.info(StringUtils.strip("  aa "));
        log.info(StringUtils.strip(" ") );
        log.info(StringUtils.strip("/b weg weg  "));
    }
    /*去除两端空白，不包含制表符, null 或''返回null*/
    @Test
    public void testStripToNull(){
        log.info(StringUtils.stripToNull("aa") );
        log.info(StringUtils.stripToNull("  aa "));
        log.info(StringUtils.stripToNull(" ") );
        log.info(StringUtils.stripToNull("/b weg weg  "));
    }
    /*去除两端空白，不包含制表符, null 或''返回''*/
    @Test
    public void testStripToEmpty(){
        log.info(StringUtils.stripToEmpty("aa") );
        log.info(StringUtils.stripToEmpty("  aa "));
        log.info(StringUtils.stripToEmpty(" ") );
        log.info(StringUtils.stripToEmpty("/b weg weg  "));
    }
    /*去除两端在第二个参数中的字符*/
    @Test
    public void testStrip2(){
        log.info(StringUtils.strip(" a1a1a ", "a ") );
        log.info(StringUtils.strip("  aa ", "a"));
        log.info(StringUtils.strip("   "," ") );
        log.info(StringUtils.strip("/b weg weg  ", "/b "));
    }

    /*去除两端在第二个参数中的字符,只去除前导*/
    @Test
    public void testStripStart(){
        log.info(StringUtils.stripStart(" a1a1a ", "a ") );
        log.info(StringUtils.stripStart("  aa ", "a"));
        log.info(StringUtils.stripStart("   "," ") );
        log.info(StringUtils.stripStart("/b weg weg  ", "/b "));
    }
    /*去除两端在第二个参数中的字符,只去除前导*/
    @Test
    public void testStripEnd(){
        log.info(StringUtils.stripEnd(" a1a1a ", "a ") );
        log.info(StringUtils.stripEnd("  aa ", "a"));
        log.info(StringUtils.stripEnd("   "," ") );
        log.info(StringUtils.stripEnd("/b weg weg  ", "/b "));
    }
    /*去除字符串数组中所有字符串前后导*/
    @Test
    public void testStripAll(){
        String[] strs = new String[]{"waw ","wweg  ", "  "};
        String[] strings = StringUtils.stripAll(strs);
        Arrays.stream(strings).forEach(System.out::println);
    }

    /*去除字符串数组中所有字符串前后导,有第二个参数的*/
    @Test
    public void testStripAll2(){
        String[] strs = new String[]{"waw ","wweg  ", "  "};
        String[] strings = StringUtils.stripAll(strs, "w ");
        Arrays.stream(strings).forEach(System.out::println);
    }

    /*比较相等,大小写敏感*/
    @Test
    public void testEquals(){
        System.out.println(StringUtils.equals("aaa","aaa"));
        System.out.println(StringUtils.equals("aaa","bbb"));
        System.out.println(StringUtils.equals("aaa","Aaa"));
    }

    /*比较相等,大小写不敏感*/
    @Test
    public void testEqualsCase(){
        System.out.println(StringUtils.equalsIgnoreCase("aaa","aaa"));
        System.out.println(StringUtils.equalsIgnoreCase("aaa","bbb"));
        System.out.println(StringUtils.equalsIgnoreCase("aaa","Aaa"));
    }

    /*IndexOf*/
    @Test
    public void testIndexOf(){
        System.out.println(StringUtils.indexOf("aaa","a"));
    }

    @Test
    public void testIndexOf2(){
        System.out.println(StringUtils.indexOf("aaa","a",1));
    }
    @Test
    public void testOrdinalIndexOf(){
        System.out.println(StringUtils.ordinalIndexOf("aaa","a",2));
    }

    @Test
    public void testJoin(){
        System.out.println(StringUtils.join("a","wg","wg"));
    }
    @Test
    public void testJoin2(){
        String[] strs = new String[]{"a","b","c"};
        System.out.println(StringUtils.join(strs, ","));
    }
}