java 实现反射 json动态转实体类--fastjson
作者：HL_123123
这篇文章主要介绍了java 实现反射 json动态转实体类--fastjson，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧
我就废话不多说了，大家还是直接看代码吧~
package test.refect;
public class Student {
// 姓名
private String name;
// 年龄
private String age;
// 住址
private String address;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
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;
}
@Override
public String toString() {
return "Student [name=" + name + ", age=" + age + ", address=" + address + "]";
}
public void sayHello(Book book){
System.out.println(book.getName());
}
}
package test.refect;
public class Book {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
package test.refect;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import com.alibaba.fastjson.JSONObject;
public class ExecuteWithFastJson {
public static <T> void main(String[] args) {
// Student str --> Student 主类
String str = "test.refect.Student";
Class<?> clazz = null;
try {
clazz = Class.forName(str);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Book实体 str --> Book 参数类
String bookStr = "test.refect.Book";
Class<?> bookClazz = null;
try {
bookClazz = Class.forName(bookStr);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// json --> Book 将参数类转为JSONOBJECT
String bookJson = "{\"name\":\"Java\"}";
// 实例化参数类
T t = (T) JSONObject.parseObject(bookJson, bookClazz);
// 将参数类注入到主类
Method method =null;
try {
method = clazz.getDeclaredMethod("sayHello", bookClazz);
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 执行主类
try {
method.invoke(clazz.newInstance(), t);
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
补充：使用fastjson 进行jsonObject转实体类对象
<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.7</version> </dependency>
首先引入相关jar包，
假设有一个实体类User
public class User{
private int id;
private String name;
}
然后通过fastJson进行类型转换
public static void main(String[] args){
String userString = "{"id":1,"name","lz"}";
JSONObject userJson = JSONObject.parseObject(userString);
User user = JSON.toJavaObject(userJson,User.class);
}
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。如有错误或未考虑完全的地方，望不吝赐教。