I can't fetch JSONObject directly, this code works:
RestTemplate restTemplate = new RestTemplate();
String str = restTemplate.getForObject("http://127.0.0.1:8888/books", String.class);
JSONObject bookList = new JSONObject(str);
but this code doesn't:
JSONObject bookList = restTemplate.getForObject("http://127.0.0.1:8888/books", JSONObject.class);
What could be the problem? It doesn't give errors but I've an empty JSONObject in the end.
my pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>library-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>LibraryClient</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
and I have to add a bit more details you can see when I use a string to cast inbetween it works. and a bit more details, maybe I should delete my pom.xml to reduce the amount of code in this question, would that make sense? | Okay more?
Send JSON Data in POST Spring provides a straightforward way to send JSON data via POST requests. The built-in @RequestBody annotation can automatically deserialize the JSON data encapsulated in the request body into a particular model object. In general, we don't have to parse the request body ourselves.
The postForObject() works in much the same way postForEntity() does - the only difference is that postForEntity() returns a ResponseEntity , while postForObject() returns that object. To that end, the methods behave the same, other than returning a different type.
RestTemplate will use reflection in order to create the resulting object
When you use restTemplate.getForObject
it will try to use the default constructor of the class you pass and then tries to fill all its fields
In this case it doesn't know how to create the JSONObject
In order to do it you must:
HttpMessageConverterExtractor
JSONObject bookList = new
JSONObject(str);
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