由于Excel文件包含二进制数据,所以这里使用FileInputStream而不是filereader类,后者读取只包含文本字符的文件。
Because Excel files contain binary data, use FileInputStream instead of the FileReader class, which reads files containing only text characters.
如果需要其他的数据类型,比如说整数、浮点数或者布尔值,必须使用相应的包装器类来解析字符串。
If you need another data type such as integer, floating point, or Boolean value, you will have to parse the string using the appropriate wrapper class.
如果输出定义包含返回字符串的输出表达式,它们会生成VARGRAPHICS (255) for DB 2类型的列,或者基于数据库类型的等效列。
If the output definition contains output expressions returning a string, they produce columns of type VARGRAPHICS (255) for DB2, or an equivalent type depending on the database type.
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