dispatcher.forward(request, response);request.setAttribute("queryResults", out);应该是这样
request.setAttribute("queryResults", out);dispatcher.forward(request, response);在分派请求之前，必须设置属性
dispatcher.forward(request, response);request.setAttribute("queryResults", out);应该是这样
request.setAttribute("queryResults", out);dispatcher.forward(request, response);在分派请求之前，必须设置属性
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