Java和SQL实现取两个字符间的值

String str = "abcdefg";
String result = str.substring(str.indexOf(">")+1, str.lastIndexOf("<"));

StringUtils.substringBefore(“abcdec”, “c”); 

StringUtils.substringBeforeLast(“abcdec”, “c”) 

substr（str,instr(str,'*',1)+1)

substring(a.specifications,charindex(':',a.specifications,charindex(';',specifications))+1,1)

SELECT SUBSTRING_INDEX(‘192;168;8;203',';',1);
==>得到结果为： 192

SELECT SUBSTRING_INDEX(‘192;168;8,203',';',-1);
==>得到结果为： 203

SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(‘192;168;8;203',';',2),';',-1);
==>得到结果为： 168

SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(‘192;168;8,203',';',-2),';',1);
==> 得到结果为：8

public static void checkCommom(String str1, String str2) {        
HashSet<String> result = new HashSet<String>();
        int length1 = str1.length();
        int length2 = str2.length();
        for (int i = 0; i < length1; i++) {
            for (int j = 0; j < length2; j++) {
                String char1 = str1.charAt(i) + "";
                String char2 = str2.charAt(j) + "";
                if (char1.equals(char2))
                {
                    result.add(char1);
                }
            }
        }
        
        Iterator<String> it = result.iterator();
        while (it.hasNext()) {
            String value = it.next();
            System.out.print(value);
        }
    }