target is null for setProperty

- No configuration found for the specified action: 'login.action' in namespace: ''. Form action defaulting to 'action' attribute's literal value.

- No configuration found for the specified action: 'login.action' in namespace: ''. Form action defaulting to 'action' attribute's literal value.

- No configuration found for the specified action: 'toSearchybgwForDo.action' in namespace: '/'. Form action defaulting to 'action' attribute's literal value.

- No configuration found for the specified action: 'toSearchybgwForDo.action' in namespace: '/'. Form action defaulting to 'action' attribute's literal value.

- No configuration found for the specified action: 'addNewReadDocument.action' in namespace: '/'. Form action defaulting to 'action' attribute's literal value.

- No configuration found for the specified action: 'addNewReadDocument.action' in namespace: '/'. Form action defaulting to 'action' attribute's literal value.

- Error setting expression 'message.type' with value '[Ljava.lang.String;@18195b3'

ognl.OgnlException: target is null for setProperty(null, "type", [Ljava.lang.String;@18195b3)

错误原因：在jsp使用到<s:hidden name="message.type" value="1"></s:hidden>，但是没有在action中定义message和他的get()、set()方法

解决方案：在action中定义message和他的get()、set()方法，重启Tomcat