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java 實(shí)現(xiàn)反射 json動(dòng)態(tài)轉(zhuǎn)實(shí)體類--fastjson

更新時(shí)間：2021年02月19日 09:57:37 作者：HL_123123

這篇文章主要介紹了java 實(shí)現(xiàn)反射 json動(dòng)態(tài)轉(zhuǎn)實(shí)體類--fastjson，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。一起跟隨小編過來看看吧

我就廢話不多說了，大家還是直接看代碼吧~

package test.refect; 
public class Student {
	// 姓名
	private String name;
	// 年齡
	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 主類
		String str = "test.refect.Student";
		Class<?> clazz = null;
		try {
			clazz = Class.forName(str);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
 
		// Book實(shí)體 str --> Book 參數(shù)類
		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 將參數(shù)類轉(zhuǎn)為JSONOBJECT
		String bookJson = "{\"name\":\"Java\"}";
		
 
		// 實(shí)例化參數(shù)類
		T t = (T) JSONObject.parseObject(bookJson, bookClazz);
		
		// 將參數(shù)類注入到主類
		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();
		}
 
		// 執(zhí)行主類
		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();
		}
	}
}

補(bǔ)充：使用fastjson 進(jìn)行jsonObject轉(zhuǎn)實(shí)體類對(duì)象

<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>fastjson</artifactId>
  <version>1.2.7</version>
</dependency>

首先引入相關(guān)jar包，

假設(shè)有一個(gè)實(shí)體類User

public class User{
 private int id;
 private String name;  
}

然后通過fastJson進(jìn)行類型轉(zhuǎn)換

public static void main(String[] args){
  String userString = "{"id":1,"name","lz"}";
  JSONObject userJson = JSONObject.parseObject(userString);
  User user = JSON.toJavaObject(userJson,User.class);
  
}

以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教。

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