将json字符串转换为Java源代码不起作用

Question

I have a dynamic JSON schema that I need to convert to Java source code at run-time
I found this Jackson example that seems very common
The code is running fine, no exceptions but not generating anything.
When I break the json structure (just to test that jackson is working) I do get Jackson exception...

@Test
public void jsonToJava() throws IOException {   
    JCodeModel codeModel = new JCodeModel();
    String schemaContents ="{\"test\":\"test\"}";

    GenerationConfig config = new DefaultGenerationConfig() {
        @Override
        public boolean isGenerateBuilders() { 
            return true;
        }
    };

    SchemaMapper mapper = new SchemaMapper(new RuleFactory(config, new Jackson2Annotator(config), new SchemaStore()), new SchemaGenerator());
    mapper.generate(codeModel, "HelloWorldClass", "com.my.package", schemaContents);
    File directory = new File("C:\\temp\\gen");
    directory.mkdirs();
    codeModel.build(directory);
}

Answer 1

I don't know anything about that library, but it appears the example doesn't work as is. According to the answers here , you need to override another method in your DefaultGenerationConfig to get this to work. Adding the following code to your example worked for me:

@Override
public SourceType getSourceType() {
    return SourceType.JSON;
}