优化xmlutil的xpath获取元素函数

src/main/src/com/brilliance/eibs/util/XmlUtil.java

@@ -322,9 +322,14 @@ public class XmlUtil {
     public static String getXmlNodeValueByXpath(Document document, String path) {
         String[] paths = path.split("#");
         String xpath = paths[0];
-        Element curElement = getNodesByXpath(document, xpath, "xpath").get(0);
-        if (paths.length > 1)
+        List<Element> lst = getNodesByXpath(document, xpath, "xpath");
+        if(lst.isEmpty()){
+            return null;
+        }
+        Element curElement = lst.get(0);
+        if (paths.length > 1){
             return curElement.attributeValue(paths[paths.length - 1]);
+        }
         return curElement.getText();
     }