SpringMVC 学习笔记(三) 使用ServletAPI 和 实体 做为参数

1.1. 使用实体类接收请求参数

Spring MVC 会按请求参数名和 实体类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。

	@RequestMapping("/pojoParams")
	public String pojoParams(User user){
		System.out.println(user);
		return "helloworld";
	}

User.java:

package com.ibigsea.springmvc.model;

import java.io.Serializable;

public class User implements Serializable {

	private static final long serialVersionUID = -5975751076183659876L;

	private String name;
	private int age;

	private Department department;

	public String getName() {
		return name;
	}

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

	public int getAge() {
		return age;
	}

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

	public Department getDepartment() {
		return department;
	}

	public void setDepartment(Department department) {
		this.department = department;
	}

	@Override
	public String toString() {
		return "User [name=" + name + ", age=" + age + ", department="
				+ department + "]";
	}

}

Department.java :

package com.ibigsea.springmvc.model;

import java.io.Serializable;

public class Department implements Serializable {

	private static final long serialVersionUID = 6881984318733090395L;

	private Integer id;
	private String name;

	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}

	@Override
	public String toString() {
		return "Department [id=" + id + ", name=" + name + "]";
	}

}

JSP:

<h1>PoJo param</h1>
<form action="pojoParams" method="post">
	name:<input type="text" name="name"><br/>
	age:<input type="text" name="age"><br/>
	department id :<input type="text" name="department.id"><br/>
	department name :<input type="text" name="department.name"><br/>
	<input type="submit" value="submit">
</form>

运行结果:

User [name=bigsea, age=23, department=Department [id=1, name=test]]

1.2.  ServletAPI 作为请求参数

	@RequestMapping("/servletApi")
	public String servletApi(HttpServletRequest request,HttpServletResponse response,HttpSession session){
		System.out.println("servletApi");
		return "helloworld";
	}

从源码中可以知道 spirngMVC 支持 9种 参数

javax.servlet.ServletRequest

javax.servlet.ServletResponse

javax.servlet.http.HttpSession

java.security.Principal

java.util.Locale

java.io.InputStream

java.io.Reader

java.io.OutputStream

java.io.Writer