Struts2 访问web元素
1、struts.xml
<struts>
<constant name="struts.devMode" value="false" />
<constant name="struts.enable.DynamicMethodInvocation" value="true" />
<constant name="struts.i18n.encoding" value="utf-8"></constant>
<package name="login" namespace="/login" extends="struts-default">
<action name="login*" class="com.wxh.action.LoginActon{1}" >
<result >/useraddsuccess.jsp</result>
</action>
</package>
</struts>
2、index.jsp
<body> 取得request,session,application的引用; <br/> <form name="f" action="" method="post"> 用户名：<input type="text" name="name"/> 密码：<input type="text" name="password"/> <br/> <input type="button" value="submit1" onclick="javascript:document,f,action='login/login1';document.f.submit();"/> <input type="button" value="submit2" onclick="javascript:document,f,action='login/login2';document.f.submit();"/> <input type="button" value="submit3" onclick="javascript:document,f,action='login/login3';document.f.submit();"/> <input type="button" value="submit4" onclick="javascript:document,f,action='login/login4';document.f.submit();"/> </form> </body>
3、useraddsuccess.jsp
<pre name="code" class="html"><%@taglib uri="/struts-tags" prefix="s"%>
<body>
user login success!
<br/>
<s:property value="#request.r1"/> | <%=request.getAttribute("r1") %><br/>
<s:property value="#session.s1"/> | <%=session.getAttribute("s1") %><br/>
<s:property value="#application.a1"/> | <%=application.getAttribute("a1") %><br/>
</body>
package com.wxh.action;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class LoginActon1 extends ActionSupport {
private Map request;
private Map session;
private Map application;
public LoginActon1(){
request=(Map)ActionContext.getContext().get("request");
session=ActionContext.getContext().getSession();
application=ActionContext.getContext().getApplication();
}
public String execute(){
request.put("r1", "r1");
session.put("s1","s1");
application.put("a1", "a1");
return SUCCESS;
}
}
package com.wxh.action;
import java.util.Map;
import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;
import com.opensymphony.xwork2.ActionSupport;
public class LoginActon2 extends ActionSupport implements RequestAware,SessionAware,ApplicationAware{
/**
*
*/
private static final long serialVersionUID = 1L;
private Map<String,Object>request;
private Map<String,Object>session;
private Map<String,Object>application;
public String execute(){
request.put("r1", "r1");
session.put("s1","s1");
application.put("a1", "a1");
return SUCCESS;
}
@Override
public void setApplication(Map<String, Object> application) {
// TODO Auto-generated method stub
this.application=application;
}
@Override
public void setSession(Map<String, Object> session) {
// TODO Auto-generated method stub
this.session=session;
}
@Override
public void setRequest(Map<String, Object> request) {
// TODO Auto-generated method stub
this.request=request;
}
}
LoginAction3.java
package com.wxh.action;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class LoginActon3 extends ActionSupport{
private HttpSession session;
private HttpServletRequest request;
private ServletContext application;
public LoginActon3(){
request=ServletActionContext.getRequest();
session=request.getSession();
application=session.getServletContext();
}
public String execute(){
request.setAttribute("r1", "r1");
session.setAttribute("s1","s1");
application.setAttribute("a1", "a1");
return SUCCESS;
}
}
LoginAction4.java
package com.wxh.action;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.struts2.interceptor.ServletRequestAware;
import com.opensymphony.xwork2.ActionSupport;
public class LoginActon4 extends ActionSupport implements ServletRequestAware{
private HttpSession session;
private HttpServletRequest request;
private ServletContext application;
public String execute(){
request.setAttribute("r1", "r1");
session.setAttribute("s1","s1");
application.setAttribute("a1", "a1");
return SUCCESS;
}
@Override
public void setServletRequest(HttpServletRequest request) {
// TODO Auto-generated method stub
this.request=request;
this.session=request.getSession();
this.application=session.getServletContext();
}
}