Basic Hibernate Case 1: Basic hibernate case

Basic Hibernate Case 1: Basic hibernate case

The MySQL database is used.

 

1. Introduce the jar package in the project and add references.

<Dependencies> <dependency> <groupId> junit </groupId> <artifactId> junit </artifactId> <version> 4.3 </version> <scope> test </scope> </ dependency> <groupId> anlr </groupId> <artifactId> anlr </artifactId> <version> 2.7.7 </version> </dependency> <groupId> commons -collections </groupId> <artifactId> commons-collections </artifactId> <version> 3.2.1 </version> </dependency> <gr OupId> commons-logging </groupId> <artifactId> commons-logging </artifactId> <version> 1.1.1 </version> </dependency> <groupId> dom4j </ groupId> <artifactId> dom4j </artifactId> <version> 1.6.1 </version> </dependency> <groupId> org. hibernate </groupId> <artifactId> hibernate-core </artifactId> <version> 5.2.10.Final </version> </dependency> <groupId> org. hibernate. javax. persis Tence </groupId> <artifactId> hibernate-jpa-2.0-api </artifactId> <version> 1.0.1.Final </version> </dependency> <groupId> schemsist </groupId> <artifactId> extends sIST </artifactId> <version> 3.12.1.GA </version> </dependency> <groupId> javax. transaction </group ID> <artifactId> jta </artifactId> <version> 1.1 </version> </dependency> <! -- Https://mvnrepository.com/artifact/log4j/log4j --> <dependency> <groupId> log4j </groupId> <artifactId> log4j </artifactId> <version> 1.2.17 </version> </dependency> <groupId> org. slf4j </groupId> <artifactId> slf4j-api </artifactId> <version> 1.6.1 </version> </dependency> <groupId> org. slf4j </groupId> <artifactId> slf4j-log4j12 </artifactId> <version> 1.7.5 </version> <scope> test </sco Pe> </dependency> <! -- Mysql --> <dependency> <groupId> org. wisdom-framework </groupId> <artifactId> mysql-connector-java </artifactId> <version> 5.1.34 _ 1 </version> </dependency> </dependencies>View Code

When referencing a jar package, do not reference the Java ee-api jar first, and an error will be reported.

2. Write the student's entity class

// Student ID private Integer sid; // name private String name; // age private Integer age;View Code

3. Hibernate. cfg. xml configuration (cfg indicates configuration)

1 <? Xml version = '1. 0' encoding = 'utf-8'?> 2 <! DOCTYPE hibernate-configuration PUBLIC 3 "-// Hibernate/Hibernate Configuration DTD 3.0 // EN" 4 "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 5 4. Student. hbm. xml

1 <? Xml version = '1. 0' encoding = 'utf-8'?> 2 3 <! DOCTYPE hibernate-mapping PUBLIC 4 "-// Hibernate/Hibernate DTD ing DTD 3.0 // EN" 5 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 6 5. Test class for saving data to the database using Hibernate

1 @ Test 2 public void testhibernate () {3 4 // 01 prepare a Student object 5 Student stu = new Student (); 6 stu. setSid (3); 7 stu. setName ("white"); 8 stu. setAge (44); 9 10 // 02 Hibernate save 11 // read the large Configuration file and obtain the connected database information 12 Configuration cfg = new Configuration (). configure (); 13 14 // 3 create SessionFactory15 SessionFactory factory = cfg. buildSessionFactory (); 16 17 // process session18 Session session = factory. openSession (); 19 20 // start Transaction 21 Transaction tx = session. beginTransaction (); 22 23 // 5Hibernate24 25 session. save (stu); 26 27 tx. commit (); 28 System. out. println ("save OK"); 29}View Code

6. Implementation