java.util Pattern 和 Mathcer

    private String regex ;
    private String input;
    @Before
    public void init(){
        regex = "\\[{0,1}([\u4e00-\u9fa5]+)/[A-Za-z]+\\]{0,1}[A-Za-z]*";
        input = "延安/ns";

    }

/**
     * 测试给定的正则表达式是否匹配输入的字符串,
     * 这里该正则表达式只使用一次
     */
    @Test
    public void test1matches(){
        
        boolean isMacher  = Pattern.matches(regex, input);
        System.out.println(isMacher);
    }

        String regex = "\\[{0,1}([\u4e00-\u9fa5]+)/[A-Za-z]+\\]{0,1}[A-Za-z]*";
        string input = "[中国/ns  国务院/nt]nt";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(input);
        while(matcher.find()){
            //从1开始计数
            System.out.println(matcher.group(1));
        }