Gerald Jorm framework in the Java library sharing and actual combat experience

Title: Gerald Jorm framework in the Java class library sharing and actual combat experience Abstract: This article will share the application cases of the Gerald Jorm framework in the Java class library, and provide practical experience and related Java code examples.Gerald Jorm is an efficient and convenient Java object-mapping (ORM) framework for data interaction between Java applications and relational databases.By mastering the use skills of Gerald Jorm, developers can improve development efficiency and code quality, thereby rapidly building a reliable Java application. 1. Gerald Jorm Introduction Gerald Jorm is an open source Java ORM framework that provides a set of simple and easy -to -use APIs to map Java objects to the table structure of the relational database.It can provide functions such as persistence, querying and associated operations, so that developers can easily handle database operations. 2. Application case scene 2.1 Database table mapping Gerald Jorm can map the Java objects to the columns and data types in the database table through annotations and names.The following is a basic example: @Table(name = "users") public class User { @Column(name = "id", type = ColumnType.INT, primaryKey = true) private int id; @Column(name = "name", type = ColumnType.VARCHAR) private String name; // omit Getters and Setters } 2.2 Data persistence operation Gerald Jorm provides a simple API for performing database operations such as insertion, updating and deleting.Developers can understand their application methods through the following example: User user = new User(); user.setName("John Doe"); Jorm.insert (user); // Insert new users user.setName("Jane Smith"); Jorm.update (user); // Update user information Jorm.delete (user); // Delete the user 2.3 Query operation Gerald Jorm supports rich query functions, such as querying, sorting and paging according to conditions.The following is an example: List<User> users = Jorm.select(User.class) .where("name", Operators.EQUALS, "John") .orderBy("id", Ordering.DESC) .limit(10) .offset(0) .execute(); for (User user : users) { System.out.println(user.getName()); } 3. Practical experience 3.1 Use the right data type When defining the mapping entity class, select the suitable data type to match the data type in the database, which can improve the query efficiency and type security. 3.2 Perform batch operations If you need to perform a large amount of database operations, try to use batch operations to reduce the number of interactions with the database, thereby improving performance. 3.3 Reasonable use of query cache Gerald Jorm provides a query cache mechanism to cache query results to improve performance.However, it is necessary to use it reasonably to avoid excessive cache caused by high memory occupation. Summary: Gerald Jorm framework simplifies the interaction process of Java applications and relational databases.Through the sharing of application cases and practical experience, developers can better master Gerald Jorm's use skills and improve development efficiency and code quality.It is hoped that this article is helpful for developers who want to apply Gerald Jorm frameworks in the Java application.