去除Jsp页面空白行

• 在Jsp页面head位置添加

<%@ page trimDirectiveWhitespaces="true" %>

• 在项目web.xml中添加

<servlet>
    <servlet-name>jsp</servlet-name>
    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
    <init-param>
        <param-name>trimSpaces</param-name>
        <param-value>true</param-value>
    </init-param>
</servlet>