我在頁面上一點擊查詢，瀏覽器上不提示任何錯誤但是無法請求到數據，服務器提示如下：
2017-4-19 10:09:27 org.apache.jasper.compiler.TldLocationsCache tldScanJar
信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
但是頁面沒有顯示。原因是tomcat對於頁面el表達式的校驗。
解決方案是：把你的頁面中含有$的的註釋 去掉就好了。或者將註釋換成<%-- --%>
項目錯誤區：
