Learn from the core framework of the code generator in the Java class library

Learn from the core framework of the code generator in the Java class library Code generator is a tool that can generate source code according to specific rules. It can greatly improve development efficiency and help developers follow a unified code specification.In the Java class library, there are many popular code generators. The core framework provides infrastructure and key functions to facilitate developers to customize and expand. The core framework of the code generator usually includes the following key components: 1. Template Engine: The template engine is used to define the template generated by the code. Developers can use Placeholder in the template to represent the variables and logic when generating code.Common template engines include FreeMarker, Velocity, and Thymeleaf. 2. Model: Model is a data model used by code generator, which contains variables and logic required to generate code.Developers can define the structure of the model and provide corresponding data through the model during the process of generating code. 3. Code generator core: Code generator core is the core logic of the code generator. It is responsible for generating the final source code according to the template and the model.The core of the code generator usually provides some common functions, such as file operation, text replacement, and code formatting. The use of code generator usually involves the following steps: 1. Definition template: Developers first need to define the template generated by the code, which can be written based on specific grammatical rules and template engines. 2. Create a model: Developers create code to generate the data model required according to their own needs. 3. Configure code generator core: Developers need to configure the core of the code generator, specify relevant information such as the position of the template, the output path of the target code file. 4. Execute code generation: By calling the core API of the code generator, the template and model are used as input to perform the code generation operation.The generated source code will be replaced according to the data in the template and the data in the model and logically processing, and the final output will be output to the specified target file. It should be noted that the use of code generator may involve some specific programming code and related configuration.For example, when using the code generator in the Java library, you may need to understand how to call the core API of the code generator through the Java code, and configure the template and model according to the specific needs.These configurations may include the path of the template file, the output path of generating code, and the definition and use of variables in the model. To sum up, understanding the core framework of the code generator in the Java class library can help developers improve the efficiency and consistency of code generation, and can customize and expand according to their own needs.By familiar with the use steps and related configurations of the code generator, developers can better use the code generator to complete the duplicate encoding work, reduce the possibility of errors, and improve development efficiency.