Tool Introduction
"JSON to GO Class" is an efficient and convenient online tool designed for Go language developers. It can automatically parse the JSON format string you provide and convert it into Go language struct definition code. With this tool, you can say goodbye to manually writing tedious struct code, especially when dealing with complex JSON data structures or integrating with RESTful API interfaces, greatly simplifying the data model building process and significantly improving development efficiency and accuracy.
How to Use
- Enter JSON String: In the "JSON String" input box on the left (a Codemirror editor integrated with
lang-json syntax), paste the JSON format data you need to convert. Please ensure that the entered JSON is valid and correctly formatted.
- Automatically Generate Go Struct: The tool will, in real-time or after you finish pasting, automatically parse the JSON data and display the generated Go language struct definition code in the "Converted Class" output box on the right (a Codemirror editor integrated with
lang-go syntax).
- Copy and Use: You can directly copy the generated Go struct code from the output box and paste it into your Go language project.
Frequently Asked Questions
- Q: Which JSON data types are supported for conversion?
- A: This tool supports basic JSON data types (strings, numbers, booleans, null), objects, and arrays, and intelligently maps them to corresponding Go language types (such as
string, int/float64, bool, *interface{} or specific type pointers, struct, []type).
- Q: How will the output Go struct field names be named?
- A: The tool will convert JSON field names to PascalCase as Go struct field names according to Go language naming conventions, while retaining the original JSON field name as a
json:"original_field_name" tag to ensure normal serialization/deserialization functions.
- Q: How are null values in JSON handled?
- A: For
null values in JSON, the tool usually converts them to Go language pointer types (such as *interface{}, or to *string, *int, etc. depending on the context) to correctly represent null values. Developers may need to fine-tune it according to actual business requirements when using it.
- Q: Can it handle JSON array root elements?
- A: Yes, if your JSON input is an array, such as
[{}, {}], the tool will generate Go language code containing a slice of a single struct ([]struct Name {...}).
Notes
- JSON Format Validity: Before using this tool, please ensure that your JSON string is valid. Invalid JSON format will lead to conversion failure or generation of incorrect Go struct definitions. You can use online JSON validation tools for verification.
- Data Type Inference: The tool will try its best to infer the most suitable Go data type. However, for some ambiguous or mixed-type JSON fields (for example, the same field is sometimes a string and sometimes a number), the tool may not be able to infer perfectly, in which case you may need to manually adjust the generated Go struct field types.
- Struct Name: By default, the tool will generate a generic struct name (e.g.,
AutoGenerated). In actual projects, please be sure to change it to a name with business meaning.
- Private Fields and Exported Fields: In Go language, only fields with an uppercase first letter are exportable, and can be correctly serialized/deserialized by the
json package. The struct field names generated by this tool will follow this specification and add correct json tags.
