java web development need to know what technical

I just work a year job easier , engaged in java web development , their work is docking interfaces and clients , mainly in the webservice -based. recently wanted to consolidate about technology, but do not know where to start learning . servlet, struts, hibernate, spring before being studied .

Please help guidance . Thank you.
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java is based, multi- threading, network programming are important. . .
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spring and struts it ! This is just my suggestion .
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which not learn what
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java web, frameworks are more multi- master frame it, the web framework is a core foundation .
more popular ssh ejb
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now businesses rarely use the EJB new projects , learn jquery front bar, plug- rich , easy to use , the background can struts2/springmvc + spring + mybatis / Hibernate
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three frameworks + servlet + ajax



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I am also learning in their recommendations can refer
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Thank you really feel a lot of web knowledge