Web应用程序在浏览器中显示字符串时，由于显示长度的限制，常常需要将字符串截取后再进行显示。 本文实现用Java实现按字节长度截取字符串。-Web applications in the browser to display the string, due to length restrictions, and often need to show the string after the interception. In this paper, using Java to achieve