liuyaohe

<component name="ArtifactManager">
  <artifact type="exploded-war" name="orderSystem:war exploded">
    <output-path>$PROJECT_DIR$/out/artifacts/orderSystem_war_exploded</output-path>
    <root id="root">
      <element id="javaee-facet-resources" facet="orderSystem/web/Web" />
      <element id="directory" name="WEB-INF">
        <element id="directory" name="classes">
          <element id="module-output" name="orderSystem" />
        </element>
      </element>

liuyaohe

package com.testproject.demo;

/**
 * Created by yaohe on 2016/4/15.
 */
public class Demo {
    public static String s = new String("nihao");
 public static  void  main(String[] args){
     System.out.println(s);
 }

liuyaohe

package com.testproject.demo;

/**
 * Created by yaohe on 2016/4/15.
 */
public class Demo {
    String s = new String("nihao");
 public static  void  main(String[] args){
     System.out.println(s);
 }