springmvc筆記（5）—使用POJO做爲參數

Spring MVC 會按請求參數名和 POJO 屬性名進行自動匹配，自動爲該對象填充屬性值。支持級聯屬性。
如：dept.deptId、dept.address.tel 等。

1. 新建實體類

User.java

package com.springmvc.entities;

public class User {
	private String username;
	private String password;
	private String email;
	private int age;
	private Address address;
	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 getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public Address getAddress() {
		return address;
	}
	public void setAddress(Address address) {
		this.address = address;
	}
	@Override
	public String toString() {
		return "User [username=" + username + ", password=" + password + ", email=" + email + ", age=" + age
				+ ", address=" + address + "]";
	}
	
	
}

Address.java

package com.springmvc.entities;

public class Address {
	private String province;
	private String city;
	public String getProvince() {
		return province;
	}
	public void setProvince(String province) {
		this.province = province;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	@Override
	public String toString() {
		return "Address [province=" + province + ", city=" + city + "]";
	}
	
	
}

2. 新建表單（此處使用了級聯屬性）

<form action="springmvc/testPOJO" method="post">
		username: <input type="text" name="username"/>
		<br>
		password: <input type="password" name="password"/>
		<br>
		email: <input type="text" name="email"/>
		<br>
		age: <input type="text" name="age"/>
		<br>
		city: <input type="text" name="address.city"/>
		<br>
		province: <input type="text" name="address.province"/>
		<br>
		<input type="submit" value="Submit"/>
	</form>
	<br><br>

3. 表單提交後，交由handler處理：

@RequestMapping("/testPOJO")
	public String testPOJO(User user) {
		System.out.println("testPOJO："+user);
		return SUCCESS;
	}

4. 打印結果以下：