How can I sort the attributes of an object in Java-CodePudding

Do you know why when debbuging my app the order of the attributes of my address object is changed? I need to check it the address stored in the database is equal to the one coming from the frontend. I'm using objectmapper to get the object into text so the I can compare 2 strings but due this situation I always get false as the order change as you can see in the picture below.

CodePudding user response：

Using new ObjectMapper.writeValueAsString() should give you the fields in order as you expect it to. As @Federico klez Culloca stated, you should instead use the objects themselves to compare. You should construct an Address object from address.getAddressString() or just directly compare address to a using a.equals().

CodePudding user response：

You can parse strings to JsonNode and compare them. Jackson provides overrides of equals(Object o) for all node types.

ObjectMapper mapper = new ObjectMapper();
JsonNode actualNode = mapper.readTree(actualJson);
JsonNode expectedNode = mapper.readTree(expectedJson));
boolean matches = actualNode.equals(expectedNode);

This guide should be helpful as well.

The other option is to provide implementation of equals() in you custom class, as mentioned in comments.