/jsonparser

parses JSON, returns a Java object parse tree

Primary LanguageJava

jsonparser

parses JSON, returns a Java object parse tree

Instructions:

  1. Execute "javac jsonparser/*.java" from root directory of repository

  2. Add the statement "import jsonparser.Parser;" to your Java source file

  3. Create a Parser object

    • "Parser parser = new Parser();"

  4. Call the parse method of the Parser object on a File object or a String object

    • parser.parse(new java.io.File("path/of/your/json/file"));
    • parser.parse("{\"key1\" : \"value1\", \"key2\": \"value2\"}");
      • Note: you must escape JSON string literals

  5. parser.parse returns root of the parse tree, which is a JsonElement

    • JsonElement is a superclass of the following classes:
      • JsonObject
      • JsonArray
      • JsonString
      • JsonNumber
      • JsonBoolean
      • JsonNull

  6. Call the corresponding method for each class, listed below, to get the underlying object

    • JsonObject - Map<String, JsonElement> getMap()
    • JsonArray - List getList()
    • JsonString - String getString()
    • JsonNumber - Double getDouble()
    • JsonNull - none
    • JsonBoolean - Boolean getBoolean

  7. With the methods above you can traverse the tree and get the data from a node