struts2注入类

struts2是可以注入一个对象的,那么一定需要继承ModelDriven的泛型接口。

package com.test.action;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.test.model.Contact;
import com.test.model.User;

public class ValideAction extends ActionSupport implements ModelDriven<User>{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	private User user;
	private String username;
	private Contact contact;
	
	
	
	public Contact getContact() {
		return contact;
	}

	public void setContact(Contact contact) {
		this.contact = contact;
	}

	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;
	}

	private String password;
	
	public String execute()
	{
		System.out.println(user.getContact().getPhone());
		return SUCCESS;
	}

	@Override
	public User getModel() {
		// TODO Auto-generated method stub
		if (null == user) {
			   return user = new User();
			  }
			  return user;
	}

}
如上面的代码所示,就是会将User注入到类action中。而User也是一个嵌套类。

User

package com.test.model;

public class User {
	private String username;
	
	private Contact contact;
	
	public Contact getContact() {
		return contact;
	}
	public void setContact(Contact contact) {
		this.contact = contact;
	}
	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;
	}
	private String password;
	
	public String toString()
	{
		return username+" "+password;
	}

}

里面包含一个联系信息类Contact

package com.test.model;

public class Contact {
	private String phone;
	private String address;
	private String email;
	
	public Contact()
	{
		
	}
	public Contact(String phone,String address,String email)
	{
		this.phone=phone;
		this.address=address;
		this.email=email;
	}
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	
	
}

然后JSP页面的input类型如下所示

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<!-- 这个地方是用来显示错误信息 -->
<s:fielderror/>
<form action="data.action" method="post">
用户名:<input type="text" name="username"><br>
密码:<input type="password" name="password"><br>
-------------------联系方式----------------<br>
手机:<input type="text" name="contact.phone"><br>
地址:<input type="text" name="contact.address"><br>
邮箱:<input type="text" name="contact.email"><br>


<input type="submit" name="ok"><br>
</form>
</body>
</html>


输出JSP页面如下所示

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
测试结果页面<br>
用户名:<s:property value="username"/><br>
密码:<s:property value="password"/><br>
--------------------联系方式-------------<br>
手机:<s:property value="contact.phone"/><br>
地址:<s:property value="contact.address"/><br>
邮箱:<s:property value="contact.email"/><br>

<s:debug></s:debug>
</body>
</html>


最终的输出结果如图所示

struts2注入类_第1张图片



从这个例子中,学会了跳跃性的解决问题的思路,另外就是对依赖注入还不是非常了解,这个需要重点去学习和理解一下,特别是常用的几种注入方式。


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