spring注入：设值注入

1、entity/User类

package entity;

public class User {
private String userName;
private int age;

public User(String userName, int age) {
	super();
	this.userName = userName;
	this.age = age;
}
public User() {
	super();
	
}
public String getUserName() {
	return userName;
}
public void setUserName(String userName) {
	this.userName = userName;
}
public int getAge() {
	return age;
}
public void setAge(int age) {
	this.age = age;
}
}

2、dao/UserDao类

package dao;

import entity.User;

public interface UserDao {
public User findUser();
}

3、dao.impl/UserDaoImpl类