Boolean.parseBoolean(string)

源码如下：

/**
     * Parses the string argument as a boolean.  The {@code boolean}
     * returned represents the value {@code true} if the string argument
     * is not {@code null} and is equal, ignoring case, to the string
     * {@code "true"}. <p>
     * Example: {@code Boolean.parseBoolean("True")} returns {@code true}.<br>
     * Example: {@code Boolean.parseBoolean("yes")} returns {@code false}.
     *
     * @param      s   the {@code String} containing the boolean
     *                 representation to be parsed
     * @return     the boolean represented by the string argument
     * @since 1.5
     */
    public static boolean parseBoolean(String s) {
    
    
    /**
    String类型转boolean类型的一个方法
	当String的值为“true”时返回true，（equalsIgnoreCase忽略大小写）
	当为其他字符串时返回false。
    */
        return ((s != null) && s.equalsIgnoreCase("true"));
    }