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JSON to XML with Jackson

April 10, 2018

I wanted to take an arbitrary JSON string and turn it into the equivalent XML. This can be done using the Jackson library.

String jsonString = "" 
        + "{\n \"_links\": {\n" 
        + "    \"individual\": {\n" 
        + "      \"href\": \"/individuals/matching\",\n" 
        + "      \"name\": \"GET\",\n" 
        + "      \"title\": \"Individual Details\"\n" 
        + "    },\n" 
        + "    \"self\": {\n" 
        + "      \"href\": \"/individuals/matching/\"\n" 
        + "    }\n" //
        + "  }\n" //
        + "}";

ObjectMapper objectMapper = new ObjectMapper();
ObjectMapper xmlMapper = new XmlMapper();
JsonNode tree = objectMapper.readTree(jsonString);
String jsonAsXml = xmlMapper.writer().withRootName("RootTagName").writeValueAsString(tree);

Tags: java java8 jackson xml json convert xmlmapper objectmapper