java 正则表达式

public static String filter(String displayName){
        Pattern pen = null;
        String en_begin = "([A-Za-z ]+)";
        pen = Pattern.compile(en_begin);

        JSONArray jsonArray = new JSONArray();
        JSONObject jsonintr = new JSONObject();
        if (pen.matcher(displayName).matches()) {
            jsonintr.element("en_US",displayName);
        } else {
            jsonintr.element("zh_CN",displayName);
        }
        jsonArray.add(jsonintr);
        return jsonArray.toString();
    }

    public static String filterVersionNum(String displayName) {
        String versionNum = "(android|os)?( )*([0-9].)*([0-9])( (B|b)eta)?";
        String result = displayName;
        result = result.replaceAll(versionNum, "");
        return result;
    }

 

正则表达式：

 

 

public static void regPattern() {
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
//英文，数字 开头,加上 中文  可选的英文
		String reg_charset = "([a-z]*)([A-Z]*)([0-9]*)([\u4E00-\u9FA5]*)([a-z]*)([A-Z]*)([0-9]*)";
		p = Pattern.compile(reg_charset);
		m = p.matcher("sdgf中文");
		b = m.matches();
		System.out.println(b);// true
	}

	public static void regPattern2() {
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		String reg_charset = "([\u4E00-\u9FA5 ]*)(([a-z]*)([A-Z]*))([\u4E00-\u9FA5]*)";
		p = Pattern.compile(reg_charset);
		m = p.matcher("中文 fdgfdg中文");
		b = m.matches();
		System.out.println(b);// tree

		m = p.matcher("中文 ");// false
		b = m.matches();
		System.out.println(b);
	}

	public static void regPattern3() {
		// (^s*)|(s*$) 空格
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		String reg_charset = "([\u4E00-\u9FA5]*)((^s*)|(s*$))";
		p = Pattern.compile(reg_charset);
		m = p.matcher("中文 ");
		b = m.matches();
		System.out.println(b);// false
	}

	public static void regPattern4() {
		// 空格
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		String reg_charset = "((^s*)|(s*$))";
		p = Pattern.compile(reg_charset);
		m = p.matcher(" ");
		b = m.matches();
		System.out.println(b);// false
	}

	public static void regPattern5() {
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		String reg_charset = "([\u4E00-\u9FA5]+)((([a-z]*)([A-Z]*)([0-9]*))*)([\u4E00-\u9FA5]*)";
		p = Pattern.compile(reg_charset);
		m = p.matcher("新生代捕鱼2HD");
		b = m.matches();
		System.out.println(b);// true
	}

	public static void regPattern6() {
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		String reg_charset = "([A-Za-z]+)((([\u4E00-\u9FA5]*)([0-9]*))*)([A-Za-z]*)";
		p = Pattern.compile(reg_charset);
		m = p.matcher("SDJFsdfg洗涤剂发FDGsd");
		b = m.matches();
		System.out.println(b);// true
	}

	// 以数字开头的
	// 数字 中 英
	// 数字 中
	// 数字 英
	// 数字
	public static void regPattern7() {
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		String reg_charset = "([0-9]+)((([\u4E00-\u9FA5]*)([A-Z]*)([a-z]*))*)([0-9]*)";
		p = Pattern.compile(reg_charset);
		m = p.matcher("123苏丹红发asd");
		b = m.matches();
		System.out.println(b);// true
	}

	public static void regParttern8() {
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		String versionNum = "(android|os)?( )*([0-9].)*([0-9])( (B|b)eta)?";

		// String forStr = "(for )?((A|a)ndroid([0-9].)(0-9)|OS)";

		p = Pattern.compile(versionNum);
		m = p.matcher("android 0.0.3.9 beta");

		String str = "android 0.0.1.4 beta ";

		str = str.replaceAll(versionNum, "");

		System.out.println(str);
		b = m.matches();
		System.out.println(b);// true
	}

	public static void regParttern9() {
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		String versionNum = "([A-Za-z ]+)";

		// String forStr = "(for )?((A|a)ndroid([0-9].)(0-9)|OS)";

		p = Pattern.compile(versionNum);
		m = p.matcher("android 0.0.3.9 beta");

		String str = "android ";

		str = str.replaceAll(versionNum, "");

		System.out.println("str:" + str);
		
		
		b = m.matches();
		System.out.println(b);// true
	}