JAVA-檢查字串是否包含 中文、英文、數字

20160720 更新項目 : 添加程式碼格式
Java 文字、字串處理

清除空字串

str = str.replaceFirst(" ", "");// 前
str = str.replaceAll("\\s+$", "");// 後
str = str.trim();// 全

// The string is include number

private static boolean strIncludNumber(String str){
    boolean hasNum = false;

    if(str.matches(".*\\d+.*"))
        hasNum = true;

    return hasNum;
}

// The string is include english

private static boolean strIncludEnglish(String str){
    boolean hasEng = false;

    for(int i=0; i<str.length(); i++)
    {
        String test = str.substring(i, i+1);
        if(test.matches("[a-zA-Z]+"))
            hasEng = true;
    }

    return hasEng;
}

// The string is include chinese

private static boolean strIncludCheinese(String str){
    boolean hasChinese = false;
    for(int i=0; i<str.length(); i++)
    {
        String test = str.substring(i, i+1);
        if(test.matches("[\\u4E00-\\u9FA5]+"))
            hasChinese = true;
    }
    return hasChinese;
}