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String Agent = request.getHeader("User-Agent");
StringTokenizer st = new StringTokenizer(Agent,";");
st.nextToken();
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String userbrowser = st.nextToken();
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String useros = st.nextToken();
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System.getProperty("os.name"); //win2003¾¹È»ÊÇwin XP£¿
System.getProperty("os.version");
System.getProperty("os.arch");
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request.getHeader("User-Agent")
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