Struts2_参数获得方式

1.属性驱动

---

 /**
 * @ClassName: Demo8Action
 * @Description: struts2如何获得参数
 *                 每次请求action时都会创建新的action实例对象
 * @author 112
 * @date 2018年2月25日 下午9:17:41
 */
 public class Demo8Action extends ActionSupport{

     public Demo8Action() {
         super();
         System.out.println("Demo8Action被创建了");
     }

     //准备与页面字段名称相同的属性
     private String name;
     //自动类型转换
     private Integer age;
     private Date birthday;

     public String execute(){
         System.out.println("name参数值为：" + name);
         System.out.println("age参数值为：" + age);
         System.out.println("birthday参数值为：" + birthday);
         return SUCCESS;
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public Integer getAge() {
         return age;
     }

     public void setAge(Integer age) {
         this.age = age;
     }

     public Date getBirthday() {
         return birthday;
     }

     public void setBirthday(Date birthday) {
         this.birthday = birthday;
     }

 }

 <form action="${pageContext.request.contextPath}/Demo8Action">
         用户名：<input type="text" name="name"/><br>
         年龄：<input type="text" name="age"/><br>
         生日：<input type="text" name="birthday"/><br>
             <input type="submit" value="提交">
 </form>

 <package name="params" namespace="/" extends="struts-default">
         <action name="Demo8Action" class="cn.rocker.c_params.Demo8Action" method="execute">
             <result name="success" type="dispatcher">/form1.jsp</result>
         </action>
 </package>

2.对象驱动

---

 /**
 * @ClassName: Demo9Action
 * @Description: TODO
 * @author 112
 * @date 2018年2月25日 下午10:27:54
 */
 public class Demo9Action extends ActionSupport{
     private User user;

     public String execute(){
         System.out.println(user);
         return SUCCESS;
     }

     public User getUser() {
         return user;
     }

     public void setUser(User user) {
         this.user = user;
     }
 }

 <form action="${pageContext.request.contextPath}/Demo9Action">
         用户名：<input type="text" name="user.name"/><br>
         年龄：<input type="text" name="user.age"/><br>
         生日：<input type="text" name="user.birthday"/><br>
             <input type="submit" value="提交">
 </form>

 <package name="params" namespace="/" extends="struts-default">
         <!-- 转发 -->
         <action name="Demo9Action" class="cn.rocker.c_params.Demo9Action" method="execute">
             <result name="success" type="dispatcher">/form2.jsp</result>
         </action>
 </package>

3.模型驱动

---

 /**
 * @ClassName: Demo10Action
 * @Description: TODO
 * @author 112
 * @date 2018年2月25日 下午10:42:32
 */
 public class Demo10Action extends ActionSupport implements ModelDriven<User>{

     private User user = new User();

     public String execute(){
         System.out.println(user);
         return SUCCESS;
     }

     @Override
     public User getModel() {
         return user;
     }

 }

 <form action="${pageContext.request.contextPath}/Demo10Action">
         用户名：<input type="text" name="name"/><br>
         年龄：<input type="text" name="age"/><br>
         生日：<input type="text" name="birthday"/><br>
             <input type="submit" value="提交">
 </form>

 <package name="params" namespace="/" extends="struts-default">
         <!-- 转发 -->
         <action name="Demo10Action" class="cn.rocker.c_params.Demo10Action" method="execute">
             <result name="success" type="dispatcher">/form3.jsp</result>
         </action>
     </package>

4.集合类型参数封装

---

 /**
 * @ClassName: Demo11Action
 * @Description: 封装集合类型参数
 * @author 112
 * @date 2018年2月26日 下午8:39:59
 */
 public class Demo11Action extends ActionSupport{
     private List<String> list;
     private Map<String,String> map;

     public String execute(){
         System.out.println(list);
         System.out.println(map);
         return SUCCESS;
     }

     public List<String> getList() {
         return list;
     }

     public void setList(List<String> list) {
         this.list = list;
     }

     public Map<String, String> getMap() {
         return map;
     }

     public void setMap(Map<String, String> map) {
         this.map = map;
     }

 }

 <form action="${pageContext.request.contextPath}/Demo11Action">
         用户名：<input type="text" name="list"/><br>
         用户名：<input type="text" name="list[1]"/><br>
         用户名：<input type="text" name="map['haha']"/><br>
             <input type="submit" value="提交">
 </form>

 <package name="params" namespace="/" extends="struts-default">
         <!-- 转发 -->
         <action name="Demo11Action" class="cn.rocker.c_params.Demo11Action" method="execute">
             <result name="success" type="dispatcher">/form4.jsp</result>
         </action>
     </package>