问题原因:这是因为Tomcat默认的为只读,不允许写入操作
解决方法:修改Tomcat安装目录下的web.xml文件
<servlet><servlet-name>default</servlet-name><servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class><init-param><param-name>debug</param-name><param-value>0</param-value></init-param><init-param><param-name>listings</param-name><param-value>false</param-value></init-param><init-param><param-name>readonly</param-name><param-value>false</param-value></init-param><load-on-startup>1</load-on-startup></servlet>
添加了:
<init-param><param-name>readonly</param-name><param-value>false</param-value></init-param>