早期版本中可以如下操作
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import javax.servlet.ServletContext; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class CustomerAction extends ActionSupport{ public String execute() throws Exception { ServletContext context = ServletActionContext.getServletContext(); return SUCCESS; } } |
如果报告
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Caused by: java.lang.NullPointerException at org.apache.struts2.ServletActionContext.getServletContext(ServletActionContext.java:139) |
则代表这个版本的stucts2 中不支持这种写法，貌似2.3.16 版本的就不行,则可以通过实现ServletContextAware 接口来让spring拦截器来完成注入即可。
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import javax.servlet.ServletContext; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class CustomerAction extends ActionSupport implements ServletContextAware{ private ServletContext context; public void setServletContext(ServletContext context) { this.context = context; } } |