刚手动建了servlet项目练手。发现了以下问题。
1.org.apache.catalina.core.DefaultInstanceManager cannot be cast to org.apache.tomcat.InstanceManager
是因为我项目中多添加了一个tomcat-api.jar。
2,Can not find the tag library descriptor for "http://java.sun.com/j...
缺少 jstl.jar和 standard.jar
上传下载用到的jar:
commons-fileupload 组件下载:http://commons.apache.org/fileupload/
commons-io组件下载:http://commons.apache.org/io/
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