1.model对象
代码语言：javascript复制public class UserModel {
@ColumnAnnotation(index=0)
private String username;
@ColumnAnnotation(index=1)
private String sex;
@ColumnAnnotation(index=2)
private String age;
@ColumnAnnotation(index=3)
private String address;
@Override
public String toString() {
return "UserModel [username=" username ", sex=" sex ", age="
age ", address=" address "]";
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}2.注解
代码语言：javascript复制@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ColumnAnnotation {
/**
* 下标
*/
int index();
}3.工具类
代码语言：javascript复制public class IBeanUtils<T> {
public T fieldSet(T t, String[] dataArray) throws IllegalAccessException {
if (null == dataArray || dataArray.length == 0) {
return t;
}
Field[] thisFields = t.getClass().getDeclaredFields();
for (Field f : thisFields) {
if (f == null) {
continue;
}
if (f.isAnnotationPresent(ColumnAnnotation.class)) {
ColumnAnnotation columnAnnotation = f.getAnnotation(ColumnAnnotation.class);
if (columnAnnotation.index() < dataArray.length) {
//赋值
setVal(t, f, dataArray[columnAnnotation.index()]);
}
}
}
return t;
}
private void setVal(T t, Field f, String data) throws IllegalAccessException {
f.setAccessible(true);
f.set(t, data);
}
public static void main(String[] args) throws IllegalAccessException {
String[] dataArray = {"liudehua", "男", "55", "香港","other"};
UserModel model = new IBeanUtils<UserModel>().fieldSet(new UserModel(), dataArray);
System.out.println(model.toString());
}
}
