Improve development efficiency: Use the code generator core framework in the Java class library

Improve development efficiency: Use the code generator core framework in the Java class library Overview: In the process of software development, it is often necessary to write a large number of repetitive code, which not only wastes the time and energy of developers, but also increases the risk of errors.In order to improve development efficiency, the Java class library provides some powerful code generator frameworks, which can automatically generate code to reduce the workload of manual writing code.This article will introduce a major Java code generator framework, as well as related programming code and configuration. Core framework of code generator: In the Java class library, there are multiple code generator frameworks, such as MyBatis Generator, Spring ROO, etc.These frameworks can generate corresponding Java codes according to the given templates and configuration information, including physical classes, DAO, Service, etc.Among them, MyBatis Generator is a commonly used code generator framework. It is based on MyBatis's durable layer framework and can automatically generate the corresponding Java code according to the database table structure. Steps for usage: 1. Introduction to mybatis general dependencies: Add relevant dependencies to the construction file of the project, such as Maven's pom.xml file. 2. Configure the parameter of Generator: In the configuration file of the project, the parameter information of the generator is configured, including database connection information, generated file paths, code templates, etc.You can customize the production rules and templates as needed. 3. Write the configuration file of Generator: Create a XML configuration file to define the table information and generating rules that need to be generated.The configuration file contains information such as the Java -class package name, table name, list name, and names of generating files. 4. Run the Generator: Write a Java program, use the API provided by MyBatis Generator, read the configuration file and generate code.In the process of generating, MyBatis Generator will analyze the database table structure according to the configuration file and template to generate the corresponding Java code. Example code: Here are a simple example of generating code using mybatis generals: // Create a generator instance Configuration config = new Configuration(); // Read the configuration file config.addConfigurationFile("/path/to/generatorConfig.xml"); // Create a shellcallback instance DefaultShellCallback callback = new DefaultShellCallback(true); // Create a MyBatisgenrator instance MyBatisGenerator generator = new MyBatisGenerator(config, callback, null); // Execute the production code task generator.generate(null); In the above code, a configuration instance is first created and the configuration file is loaded.Then create a defaultShellCallback instance to deal with the problem of file conflict when generating code.Then create a Mybatisgenerator instance and pass the configuration and callback object.Finally call the `Generate` method to start performing the task of generating code. Summarize: By using the core framework of the code generator in the Java class library, we can greatly improve development efficiency, reduce the workload of writing duplicate code, and improve the quality of code and development speed.When using the code generator, we need to correctly configure the relevant parameters and templates, and understand the use of the code generator.In this way, we can quickly generate the Java code that meets the demand and speed up the progress of software development.