Spring MVC会按照请求参数名和POJO属性名进行自动匹配，自动为该对象填充属性值，支持级联属性。
如：address.city.dept.address.province等。
步骤一：定义Account.java，Address.java类：
package com.dx.springlearn.entities; public class Account {
private String username;
private String password;
private Integer 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 Integer getAge() {
return age;
} public void setAge(Integer age) {
this.age = age;
} public Address getAddress() {
return address;
} public void setAddress(Address address) {
this.address = address;
} @Override
public String toString() {
return "Account [username=" + username + ", password=" + password + ", age=" + age + ", address=" + address
+ "]";
} }
package com.dx.springlearn.entities;public class Address {
private String province;
private String city;
private String details; 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;
} public String getDetails() {
return details;
} public void setDetails(String details) {
this.details = details;
} @Override
public String toString() {
return "Address [province=" + province + ", city=" + city + ", details=" + details + "]";
}}
步骤二：在HelloWord.java控制类内添加testPojo方法：
package com.dx.springlearn.handlers;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;import com.dx.springlearn.entities.Account;@Controller
@RequestMapping("class_requestmapping")
public class HelloWord {
private static String SUCCESS = "success"; @RequestMapping("/testPojo")
public String testPojo(Account account) {
System.out.println("testPojo: account:" + account);
return SUCCESS;
}
}
步骤三：在index.jsp中添加表单提交html脚本：
<form name="testPojo" method="POST"
action="class_requestmapping/testPojo">
username:<input type="text" name="username" /> <br>
password:<input type="password" name="password" /> <br>
age:<input type="text" name="age" /> <br>
address:<br>
province:<input type="text" name="address.province" /> <br>
city:<input type="text" name="address.city" /> <br>
details:<input type="text" name="address.details" /> <br>
<input type="submit" value="Submit">
</form>
<br>
步骤四：测试
提交表单后，打印结果：
testPojo: account:Account [username=abc123, password=123456, age=28, address=Address [province=zhejiang, city=hangzhou, details=hangzhou huo che zhan]]
