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Spring Boot is a popular Java web application framework that allows developers to quickly create and deploy web applications. One of the benefits of using Spring Boot is that it simplifies the process of working with JSON and XML, two popular data formats.
In this article, we'll take a look at how to work with JSON and XML in Spring Boot. We'll start with a basic overview of each data format and then look at how to parse, convert, and query data using each format.
JSON (JavaScript Object Notation) is a format for storing and exchanging data. JSON is a text-based format, which makes it easy to exchange data between different devices and applications. JSON is also human-readable, which makes it a good format for storing data that needs to be read by humans.
JSON is based on a subset of JavaScript, so it can be used with any programming language that supports JavaScript. JSON is a popular format for data exchange because it is lightweight and easy to use.
XML (Extensible Markup Language) is a format for storing and exchanging data. XML is a text-based format, which makes it easy to exchange data between different devices and applications. XML is also human-readable, which makes it a good format for storing data that needs to be read by humans.
XML is a popular format for data exchange because it is well-supported by many programming languages and it is easy to use. XML is also a good choice for storing data that needs to be read by humans because it is easy to read and understand.
Spring Boot provides support for parsing JSON and XML. Spring Boot uses the Jackson library to parse JSON and the JAXB library to parse XML.
Parsing JSON and XML is simple using Spring Boot. The following example shows how to parse a JSON string:
String json = "{ \"foo\": \"bar\" }";
ObjectMapper mapper = new ObjectMapper();
JsonNode node = mapper.readTree(json);
String foo = node.get("foo").asText();
// foo is "bar"
The following example shows how to parse an XML string:
String xml = "<root><foo>bar</foo></root>";
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(xml)));
Element root = document.getDocumentElement();
Element foo = (Element) root.getElementsByTagName("foo").item(0);
String fooText = foo.getTextContent();
// fooText is "bar"
Spring Boot provides support for converting JSON and XML. Spring Boot uses the Jackson library to convert JSON and the JAXB library to convert XML.
Converting JSON and XML is simple using Spring Boot. The following example shows how to convert a JSON string to an XML string:
String json = "{ \"foo\": \"bar\" }";
ObjectMapper mapper = new ObjectMapper();
JsonNode node = mapper.readTree(json);
String xml = "<root>" + node.toString() + "</root>";
// xml is "<root><foo>bar</foo></root>"
The following example shows how to convert an XML string to a JSON string:
String xml = "<root><foo>bar</foo></root>";
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(xml)));
String json = mapper.writeValueAsString(document);
// json is "{\"root\":{\"foo\":\"bar\"}}"
Spring Boot provides support for querying JSON and XML. Spring Boot uses the Jackson library to query JSON and the JAXB library to query XML.
Querying JSON and XML is simple using Spring Boot. The following example shows how to query a JSON string:
String json = "{ \"foo\": \"bar\" }";
ObjectMapper mapper = new ObjectMapper();
JsonNode node = mapper.readTree(json);
String foo = node.get("foo").asText();
// foo is "bar"
The following example shows how to query an XML string:
String xml = "<root><foo>bar</foo></root>";
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(xml)));
Element root = document.getDocumentElement();
Element foo = (Element) root.getElementsByTagName("foo").item(0);
String fooText = foo.getTextContent();
// fooText is "bar"
In this article, we looked at how to work with JSON and XML in Spring Boot. We started with a basic overview of each data format and then looked at how to parse, convert, and query data using each format.