public class TestUtil {
private int id;
private int age;
private String personName;
public String identitify;
protected String address;
private String phone;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getPersonName() {
return personName;
}
public void setPersonName(String personName) {
this.personName = personName;
}
public String getIdentitify() {
return identitify;
}
public void setIdentitify(String identitify) {
this.identitify = identitify;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
@Override
public String toString() {
return “TestUtil [id=” + id + “, age=” + age + “, personName=”
+ personName + “, identitify=” + identitify + “, address=”
+ address + “, phone=” + phone + “]”;
}
public static void main(String[] args) throws Exception, IllegalAccessException {
TestUtil test111 = new TestUtil();
test111.setAge(18);
test111.setIdentitify(“111111111111111111111”);
test111.setPhone(“138888888888”);
for (Field f : test111.getClass().getDeclaredFields()) {
f.setAccessible(true);
if (f.get(test111) == null){ //判断字段是否为空，并且对象属性中的基本都会转为对象类型来判断
f.set(test111, “778878”);
System.out.println(f.getName());
}
}
System.out.println(test111.toString());
}
}
运行结果
personName
address
TestUtil [id=0, age=18, personName=778878, identitify=111111111111111111111, address=778878, phone=138888888888]