About struts2 Error There is no Action mapped for action namelogin. - [Unknown locatio

Evening watching struts2 when imitating made ​​a simple demo, always found error, online search using someone else's way did not solve , seeking god which , under the guidance issued figure below




knees and begged the god of guidance , hey , and made no drowsiness
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your configuration file namespace wrong bar ! Seemingly must use "/" at the beginning of it !
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positive Solutions
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. . . So last night, actually wrote , but then found that although no error, but the point of the submission page not found, try the next evening and came back and found that in fact had not been written into their own action, one saw that it was the default execute () method wrote excute (); wonder inside before System.out.println (" Jump into the success page " + getUsername () + "-----" + getPassword ()); been but not output , but also thought that his profile was wrong, tragedy. . . Tangle a night
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landlord do ? See my post ah , but also error, can not find the problem ah ! http://bbs.csdn.net/topics/390534455
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landlord do ? See my post ah , but also error, can not find the problem ah ! http://bbs.csdn.net/topics/390534455  

have seen , just do not know can not help you solve the problem , I was just watching struts2