REST Assured 61 - Deserialize Using JsonPath_deserializeusing

REST Assured 系列汇总 之 REST Assured 61 - Deserialize Using JsonPath

介绍

早期我们有介绍 De-Serialization – JSON Object To Java Object Using Jackson API，同样我们也可以通过 JsonPath 来反序列化。

前提条件

默认 Rest Assured 是包括 JsonPath 依赖库的。所以只要添加了 Rest Assured 依赖库，就没有必要再添加 JsonPath 依赖库了。

<!-- REST Assured -->
<dependency>
  <groupId>io.rest-assured</groupId>
  <artifactId>rest-assured</artifactId>
  <version>4.4.0</version>
</dependency>
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用 JsonPath 反序列化Deserialization

We will take a very simple JSON Object and will create a POJO for it.
将拿一个简单的 JSON Object 为例子，为它创建一个 POJO 类。

JSON Object

{
  "id": 1,
  "first_name": "Lothaire",
  "last_name": "Benazet",
  "email": "lbenazet0@tinyurl.com",
  "gender": "Male"
}
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Employee POJO

public class Employee {
 
	private Integer id;
	private String first_name;
	private String last_name;
	private String email;
	private String gender;
	
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getFirst_name() {
		return first_name;
	}
	public void setFirst_name(String first_name) {
		this.first_name = first_name;
	}
	public String getLast_name() {
		return last_name;
	}
	public void setLast_name(String last_name) {
		this.last_name = last_name;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public String getGender() {
		return gender;
	}
	public void setGender(String gender) {
		this.gender = gender;
	}
}
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将一个 Java object 转换成一个 JSON Object 称为序列化 serialization, 反之是反序列化 Deserialization。JsonPath 类提供一个方法 “T getObject(String path, Class objectType)” 获取一个 Object 的 path 的结果作为一个 Java Object。

反序列化

import io.restassured.path.json.JsonPath;
 
public class DeserializationUsingJsonPath {
	
	public static void main(String[] args) {
		
		String jsonObject = "{\r\n" + 
				"  \"id\": 1,\r\n" + 
				"  \"first_name\": \"Lothaire\",\r\n" + 
				"  \"last_name\": \"Benazet\",\r\n" + 
				"  \"email\": \"lbenazet0@tinyurl.com\",\r\n" + 
				"  \"gender\": \"Male\"\r\n" + 
				"}";
		
		JsonPath jsonPath = JsonPath.from(jsonObject);
		
		Employee employee = jsonPath.getObject("", Employee.class);
		System.out.println("Id is         : "+employee.getId());
		System.out.println("First name is : "+employee.getFirst_name());
		System.out.println("Last name is  : "+employee.getLast_name());
		System.out.println("Email id is   : "+employee.getEmail());
		System.out.println("Gender is     : "+employee.getGender());
		
		// Another way
		Employee employee1 = jsonPath.getObject("$", Employee.class);
		System.out.println("Id is         : "+employee1.getId());
		System.out.println("First name is : "+employee1.getFirst_name());
		System.out.println("Last name is  : "+employee1.getLast_name());
		System.out.println("Email id is   : "+employee1.getEmail());
		System.out.println("Gender is     : "+employee1.getGender());
 
	}
 
}
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输出：

Id is         : 1
First name is : Lothaire
Last name is  : Benazet
Email id is   : lbenazet0@tinyurl.com
Gender is     : Male
Id is         : 1
First name is : Lothaire
Last name is  : Benazet
Email id is   : lbenazet0@tinyurl.com
Gender is     : Male
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JSON Array

上面例子用 “” 和 “ $ ” 作为 JSON path，可以得到一个简单的 JSON Object。如果是如下一个嵌套的 JSON Array，我们需要写一个适当的 JSON Path 来反序列化结果。

[{
  "id": 1,
  "first_name": "Lothaire",
  "last_name": "Benazet",
  "email": "lbenazet0@tinyurl.com",
  "gender": "Male"
}, {
  "id": 2,
  "first_name": "Shellie",
  "last_name": "Cowser",
  "email": "scowser1@163.com",
  "gender": "Female"
}]
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如果我们只想反序列化上面 JSON Array 中第二个 JSON Object，实现代码如下：

import io.restassured.path.json.JsonPath;
 
public class DeserializationUsingJsonPath {
	
	public static void main(String[] args) {
		
		String jsonObject = "[{\r\n" + 
				"  \"id\": 1,\r\n" + 
				"  \"first_name\": \"Lothaire\",\r\n" + 
				"  \"last_name\": \"Benazet\",\r\n" + 
				"  \"email\": \"lbenazet0@tinyurl.com\",\r\n" + 
				"  \"gender\": \"Male\"\r\n" + 
				"}, {\r\n" + 
				"  \"id\": 2,\r\n" + 
				"  \"first_name\": \"Shellie\",\r\n" + 
				"  \"last_name\": \"Cowser\",\r\n" + 
				"  \"email\": \"scowser1@163.com\",\r\n" + 
				"  \"gender\": \"Female\"\r\n" + 
				"}]";
		
		JsonPath jsonPath = JsonPath.from(jsonObject);
		
		Employee employee = jsonPath.getObject("[1]", Employee.class);
		System.out.println("Id is         : "+employee.getId());
		System.out.println("First name is : "+employee.getFirst_name());
		System.out.println("Last name is  : "+employee.getLast_name());
		System.out.println("Email id is   : "+employee.getEmail());
		System.out.println("Gender is     : "+employee.getGender());
		
	}
 
}
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输出：

Id is         : 2
First name is : Shellie
Last name is  : Cowser
Email id is   : scowser1@163.com
Gender is     : Female
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