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public String sendMsg() throws Exception{
String username = ServletActionContext.getRequest().getParameter("username"); //»ñÈ¡Óû§Ãû
String t[] = ServletActionContext.getRequest().getParameterValues("userId"); //ÕâÀï»ñȡʱ£¬±äÁ¿Ãû¾ÍÖ±½ÓдjspÒ³ÃæµÄ¾ÍÐС£
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System.out.println(t[1]);
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