Question

求大佬解释一下 这java语句是什么意思 怎么讲解哎 谢谢！

急！谢谢

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Answer 1

ps://:注释（）:（你提问的东西没弄全）//页面指令（pagecontentType="text/html;charset=GBK"import="java.util.*"%>）//导页面指令checkout//这个不全我不知道//判断session中shopcart是否为空，为空则不执行里面的循环（test="${emptysessionScope.shopcart}">）//循环shopcart取值（items="${sessionScope.shopcart}"var="x">）=//显示shopcart里的值${x.value.goodName}${x.value.mount}publicStringexecute(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{//得到全部商品GoodServicegs=newGoodService();Object[][]data=gs.getAllGoods();//把商品放在请求域request.setAttribute("goods",data);//跳转标识return"goods";}//修改商品publicStringupdateview(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{GoodServicegs=newGoodService();Stringgoodid=request.getParameter("goodid");Mapgood;try{//按goodId得到goodgood=gs.getGoodById(goodid);//把good放在请求域request.setAttribute("good",good);//跳转标识return"updateview";}catch(Exceptione){//TODOAuto-generatedcatchblocke.printStackTrace();//把错误放在请求域request.setAttribute("msg","对不起，能要修改的商品不存在");//跳转标识return"error";｝}//删除商品publicStringdelete(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{GoodServicegs=newGoodService();//在请求域得到goodIdStringgoodid=request.getParameter("goodid");//调用删除方法booleanresult=gs.deleteGood(goodid);//判断是否删除成功if(result){//跳转标识return"goodsm";}else{//把错误放在请求域request.setAttribute("msg","商品信息删除失败");//跳转标识return"error";｝｝

Answer 2

创建一个线程，读取一个音频文件，并且播放