利用struts2框架进行将页面请求的参数封装有三种方法
第一种（不推荐）
就是动作类和bean中结合在一起，这样方法比较简单，但是很混乱。
代码：
package com.example.action;
import com.opensymphony.xwork2.ActionSupport;
public class Person extends ActionSupport{
private String username;
private String password;
private String nickname;
public String getUsername() {
return username;
}
//动作的方法
public String execute() throws Exception {
System.out.println(username+","+password+","+nickname);
return NONE;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
}
<action name="act1" class="com.example.action.Person">
<!-- 静态注入 相当于调用action动作类的get 和set 方法--> <param name="nickname">游客</param>
</action>
第二种将动作类与bean中分离
package com.example.domain;
/**
* 这是模型
* @author sheldonLee
*
*/
public class Student { private String username;
private String password;
private String nickname;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
@Override
public String toString() {
return "Student [username=" + username + ", password=" + password
+ ", nickname=" + nickname + "]";
} }
package com.example.action; import com.example.domain.Student; /**
* 这是动作
* @author sheldonLee
*
*/
public class StudentAction { private Student student; public Student getStudent() {
return student;
} public void setStudent(Student student) {
this.student = student;
} public String save(){
//将表单的数据封装到模型对象中
//调用service 将student中的数据保存到数据库中
System.out.println(student.toString());
return "none";
}
}
<body>
<form action="${pageContext.request.contextPath }/act2" method="post">
用户名：<input type="text" name="student.username"/><br/>
密 码：<input type="password" name="student.password"/><br/>
昵 称: <input type="text" name="student.nickname"/><br/>
<input type="submit" value="注册"/><br/>
</form>
第三种是驱动模型（动作和bean也是分开的）ModelDriven
package com.example.domain;
/**
* 这是Customer模型
* @author sheldonLee
*
*/
public class Customer {
private String username;
private String password;
private String nickname;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
@Override
public String toString() {
return "Customer [username=" + username + ", password=" + password
+ ", nickname=" + nickname + "]";
} }
package com.example.action; import com.example.domain.Customer;
import com.opensymphony.xwork2.ModelDriven; public class CustomerAction implements ModelDriven<Customer>{ //动作类关联一个Customer 对象
//为了getModel() 这个不会返回为空 所以要是实例化一个对象
private Customer customer= new Customer(); public Customer getCustomer() {
return customer;
} public void setCustomer(Customer customer) {
this.customer = customer;
} public String save(){
System.out.println(customer);
return "none";
}
//调用动作方法前，框架会先调用这个方法
//这里不会实例化对象
public Customer getModel() {
// TODO Auto-generated method stub
return customer;
}
}
<form action="${pageContext.request.contextPath }/act2" method="post">
<!--参数中省掉了类名 -->
用户名：<input type="text" name="username"/><br/>
密 码：<input type="password" name="password"/><br/>
昵 称: <input type="text" name="nickname"/><br/>
<input type="submit" value="注册"/><br/>
</form>
主要注意两点 动作类要实现ModelDriver的接口，动作类中要关联对象要注意要实例化