还可以通过声明方式使用该方法以简化到文本字符串的转换。
You can also use it declaratively to simplify casting to a text string.
编程经常用到字符串操作，本类封装了字符串的转换操作，非常方便，建议下载。
Programming frequently used string operations, this class encapsulates the string conversion operation, a very convenient, it is recommended to download.
串的转换先计算所包括的表达式表的值，然后按照其结果类型所特定的规则转换其结果对象为字符串。
A string conversion evaluates the contained expression list and converts the resulting object into a string according to rules specific to its type.
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