JSON string to Java object with Jackson
jackson, java, json, json-deserialization
Solution
Try this,
You can't create a new string like your doing.
String string = "{\"id\":100,\"firstName\":\"Adam\"}";
Student student = mapper.readValue(string, Student.class);
Problem
This is probably one of those questions where the title says it all. I am quite fascinated by the ObjectMapper's `readValue(file, class)` method, found within the Jackson library which reads a JSON string from a file and assigns it to an object. I'm curious if this is possible to do by simply getting JSON from a string and applying it to an object. Some sort of alternative `readValue()` method, which takes a String, instead of a file, and assigns it to an object? For instance, while the default `readValue(file, class)` method looks like this: ``` ObjectMapper mapper = new ObjectMapper(); Student student = mapper.readValue("C:\\student.json", Student.class); ``` I was wondering if there was some method in Jackson, which allowed the following: ``` ObjectMapper mapper = new ObjectMapper(); Student student = mapper.readValue("{\"id\":100,\"firstName\":\"Adam\"}", Student.class); ``` The second example takes a string and an object of a class while the first one takes a file and an object of a class. I just want to cut out the middle man, in this case, the file. Is this doable or does no such method exist within the constraints of Jackson?