- \n
- \u7a0b\u5e8f\u4e2d\u6700\u91cd\u8981\u7684\u4e00\u4e2a\u65b9\u9762\u662f\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5\u3002\u6570\u636e\u5e93\u8fde\u63a5\u548c\u4e0e\u6570\u636e\u5e93\u7684\u4e8b\u52a1\u88ab\u89c6\u4e3a\u6700\u6602\u8d35\u7684\u64cd\u4f5c\u3002\u5728\u8fd9\u65b9\u9762\uff0cORM\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u5de5\u5177\u3002ORM\u6709\u52a9\u4e8e\u7528Java\u5bf9\u8c61\u6765\u8868\u793a\u6570\u636e\u5e93\u7684\u5173\u7cfb\u3002<\/li>\n
- ORM\u5305\u542b\u4e24\u4e2a\u6982\u5ff5\uff1a\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u548c\u5173\u7cfb\u578b\u7f16\u7a0b\u3002<\/li>\n
- Hibernate\u662f\u4e00\u4e2aORM\u6846\u67b6\uff0c\u7a0b\u5e8f\u5458\u53ef\u4ee5\u5728\u5176\u4e2d\u63cf\u8ff0\u5bf9\u8c61\u5728\u6570\u636e\u5e93\u4e2d\u7684\u8868\u793a\u65b9\u5f0f\u3002Hibernate\u4f1a\u81ea\u52a8\u5904\u7406\u8f6c\u6362\u8fc7\u7a0b\u3002<\/li>\n
- Hibernate\u63d0\u4f9b\u4e86JPA\u63a5\u53e3EntityManagerFactory\u548cEntityManager\u7684\u5b9e\u73b0\u3002<\/li>\n
- EntityManagerFactory\u4e3a\u8fde\u63a5\u5230\u540c\u4e00\u6570\u636e\u5e93\u63d0\u4f9bEntityManager\u5b9e\u4f8b\u3002\u6240\u6709\u5b9e\u4f8b\u90fd\u88ab\u914d\u7f6e\u4e3a\u4f7f\u7528\u9ed8\u8ba4\u5b9e\u73b0\u6240\u5b9a\u4e49\u7684\u76f8\u540c\u8bbe\u7f6e\u3002\u53ef\u4ee5\u51c6\u5907\u591a\u4e2a\u5b9e\u4f53\u7ba1\u7406\u5668\u5de5\u5382\u6765\u8fde\u63a5\u5230\u4e0d\u540c\u7684\u6570\u636e\u5b58\u50a8\u3002<\/li>\n
- JPA EntityManager\u7528\u4e8e\u5728\u7279\u5b9a\u5e94\u7528\u7a0b\u5e8f\u4e2d\u8bbf\u95ee\u6570\u636e\u5e93\u3002\u5b83\u7528\u4e8e\u7ba1\u7406\u6301\u4e45\u5316\u5b9e\u4f53\u5b9e\u4f8b\uff0c\u901a\u8fc7\u4e3b\u952e\u6807\u8bc6\u67e5\u627e\u5b9e\u4f53\uff0c\u4ee5\u53ca\u5bf9\u6240\u6709\u5b9e\u4f53\u8fdb\u884c\u67e5\u8be2\u3002<\/li>\n<\/ul>\n
JPA EntityManager \u65b9\u6cd5\u7684\u91ca\u4e49<\/h3>\n
JPA EntityManager\u652f\u6301\u4ee5\u4e0b\u4e00\u7ec4\u65b9\u6cd5\u3002\u4e3a\u4e86\u66f4\u597d\u5730\u53ef\u8bfb\u6027\uff0c\u6211\u6ca1\u6709\u63d0\u53ca\u65b9\u6cd5\u53c2\u6570\u3002<\/p>\n
- \n
- \u6301\u4e45\u5316 – \u4f7f\u5b9e\u4f8b\u88ab\u7ba1\u7406\u5e76\u6301\u4e45\u5316\u3002<\/li>\n
- \u5408\u5e76 – \u5408\u5e76\u7ed9\u5b9a\u5b9e\u4f53\u7684\u72b6\u6001\u5230\u5f53\u524d\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\u4e2d\u3002<\/li>\n
- \u79fb\u9664 – \u79fb\u9664\u5b9e\u4f53\u5b9e\u4f8b\u3002<\/li>\n
- \u67e5\u627e – \u901a\u8fc7\u4e3b\u952e\u67e5\u627e\u3002\u641c\u7d22\u6307\u5b9a\u7c7b\u548c\u4e3b\u952e\u7684\u5b9e\u4f53\u3002\u5982\u679c\u5b9e\u4f53\u5b9e\u4f8b\u5305\u542b\u5728\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\u4e2d\uff0c\u5219\u4ece\u90a3\u91cc\u8fd4\u56de\u3002<\/li>\n
- getReference – \u8fd4\u56de\u4e00\u4e2a\u61d2\u52a0\u8f7d\u7684\u5b9e\u4f8b\uff0c\u5728\u7b2c\u4e00\u6b21\u8bbf\u95ee\u5b9e\u4f8b\u65f6\u629b\u51faEntityNotFoundException\u5f02\u5e38\u3002<\/li>\n
- \u5237\u65b0 – \u5c06\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\u4e0e\u6570\u636e\u5e93\u540c\u6b65\u3002<\/li>\n
- setFlushMode – \u8bbe\u7f6e\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\u4e2d\u6240\u6709\u5bf9\u8c61\u7684\u5237\u65b0\u6a21\u5f0f\u3002<\/li>\n
- getFlushMode – \u83b7\u53d6\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\u4e2d\u6240\u6709\u5bf9\u8c61\u7684\u5237\u65b0\u6a21\u5f0f\u3002<\/li>\n
- \u9501\u5b9a – \u4f7f\u7528\u6307\u5b9a\u7684\u9501\u5b9a\u6a21\u5f0f\u9501\u5b9a\u5305\u542b\u5728\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\u4e2d\u7684\u5b9e\u4f53\u5b9e\u4f8b\u3002<\/li>\n
- \u5237\u65b0 – \u4ece\u6570\u636e\u5e93\u5237\u65b0\u5b9e\u4f8b\u7684\u72b6\u6001\uff0c\u540c\u65f6\u4f1a\u8986\u76d6\u5bf9\u5b9e\u4f53\u7684\u66f4\u6539\u3002<\/li>\n
- \u6e05\u9664 – \u6e05\u9664\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\uff0c\u4f7f\u6240\u6709\u53d7\u7ba1\u7406\u7684\u5b9e\u4f53\u53d8\u4e3a\u6e38\u79bb\u72b6\u6001\u3002\u672a\u5237\u65b0\u5230\u6570\u636e\u5e93\u7684\u5b9e\u4f53\u7684\u66f4\u6539\u5c06\u4e0d\u4f1a\u6301\u4e45\u5316\u3002<\/li>\n
- \u5206\u79bb – \u8fd9\u7c7b\u4f3c\u4e8eclear\u65b9\u6cd5\uff0c\u53ea\u662f\u4e4b\u524d\u5f15\u7528\u6e38\u79bb\u5bf9\u8c61\u7684\u5b9e\u4f53\u5c06\u7ee7\u7eed\u5f15\u7528\u5b83\u3002<\/li>\n
- \u5305\u542b – \u68c0\u67e5\u53d7\u7ba1\u7406\u7684\u5b9e\u4f53\u662f\u5426\u5c5e\u4e8e\u5f53\u524d\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\u3002<\/li>\n
- \u83b7\u53d6\u9501\u5b9a\u6a21\u5f0f – \u83b7\u53d6\u5b9e\u4f53\u5b9e\u4f8b\u7684\u5f53\u524d\u9501\u5b9a\u6a21\u5f0f\u3002<\/li>\n
- \u8bbe\u7f6e\u5c5e\u6027 – \u8bbe\u7f6e\u5b9e\u4f53\u7ba1\u7406\u5668\u7684\u5c5e\u6027\u6216\u63d0\u793a\u3002<\/li>\n
- \u83b7\u53d6\u5c5e\u6027 – \u83b7\u53d6\u4e0e\u5b9e\u4f53\u7ba1\u7406\u5668\u76f8\u5173\u8054\u7684\u5c5e\u6027\u548c\u63d0\u793a\u3002<\/li>\n
- \u521b\u5efa\u67e5\u8be2 – \u521b\u5efa\u4e00\u4e2a\u6267\u884cJava\u6301\u4e45\u5316\u67e5\u8be2\u8bed\u8a00\u8bed\u53e5\u7684Query\u5b9e\u4f8b\u3002<\/li>\n
- \u521b\u5efa\u547d\u540d\u67e5\u8be2 – \u521b\u5efa\u4e00\u4e2a\u6267\u884cJava\u6301\u4e45\u5316\u547d\u540d\u67e5\u8be2\u8bed\u53e5\u7684Query\u5b9e\u4f8b\u3002<\/li>\n
- \u521b\u5efa\u672c\u5730\u67e5\u8be2 – \u521b\u5efa\u4e00\u4e2a\u6267\u884c\u672c\u5730SQL\u8bed\u53e5\u7684Query\u5b9e\u4f8b\u3002<\/li>\n
- \u521b\u5efa\u547d\u540d\u5b58\u50a8\u8fc7\u7a0b\u67e5\u8be2 – \u521b\u5efa\u4e00\u4e2a\u6267\u884c\u5b58\u50a8\u8fc7\u7a0b\u67e5\u8be2\u7684StoredProcedureQuery\u5b9e\u4f8b\u3002<\/li>\n
- \u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\u67e5\u8be2 – \u521b\u5efa\u4e00\u4e2a\u6267\u884c\u5b58\u50a8\u8fc7\u7a0b\u67e5\u8be2\u7684StoredProcedureQuery\u5b9e\u4f8b\u3002<\/li>\n
- \u52a0\u5165\u4e8b\u52a1 – \u544a\u77e5\u5b9e\u4f53\u7ba1\u7406\u5668\u5f53\u524d\u5b58\u5728\u4e00\u4e2aJTA\u4e8b\u52a1\u3002\u6b64\u65b9\u6cd5\u5e94\u8be5\u5728\u4e00\u4e2aJTA\u5e94\u7528\u7a0b\u5e8f\u7ba1\u7406\u7684\u5b9e\u4f53\u7ba1\u7406\u5668\u4e0a\u8c03\u7528\uff0c\u8be5\u5b9e\u4f53\u7ba1\u7406\u5668\u5728\u6d3b\u52a8\u4e8b\u52a1\u8303\u56f4\u4e4b\u5916\u521b\u5efa\uff0c\u4ee5\u5c06\u5176\u4e0e\u5f53\u524dJTA\u4e8b\u52a1\u5173\u8054\u8d77\u6765\u3002<\/li>\n
- \u662f\u5426\u52a0\u5165\u4e8b\u52a1 – \u5224\u65ad\u5b9e\u4f53\u7ba1\u7406\u5668\u662f\u5426\u94fe\u63a5\u5230\u5f53\u524d\u4e8b\u52a1\u3002<\/li>\n
- \u89e3\u5f00 – \u8fd4\u56de\u6307\u5b9a\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u4ee5\u5141\u8bb8\u8bbf\u95ee\u7279\u5b9a\u4e8e\u63d0\u4f9b\u7a0b\u5e8f\u7684API\u3002<\/li>\n
- \u83b7\u53d6\u4ee3\u7406\u5bf9\u8c61 – \u8fd4\u56de\u5b9e\u4f53\u7ba1\u7406\u5668\u7684\u63d0\u4f9b\u7a0b\u5e8f\u5bf9\u8c61\u3002<\/li>\n
- \u5173\u95ed – \u5173\u95ed\u5e94\u7528\u7a0b\u5e8f\u7ba1\u7406\u7684\u5b9e\u4f53\u7ba1\u7406\u5668\u3002<\/li>\n
- \u662f\u5426\u6253\u5f00 – \u5224\u65ad\u5b9e\u4f53\u7ba1\u7406\u5668\u662f\u5426\u6253\u5f00\u3002<\/li>\n
- \u83b7\u53d6\u4e8b\u52a1 – \u8fd4\u56de\u8d44\u6e90\u7ea7\u522b\u7684EntityTransaction\u5bf9\u8c61\u3002<\/li>\n
- \u83b7\u53d6\u5b9e\u4f53\u7ba1\u7406\u5668\u5de5\u5382 – \u4e3a\u5b9e\u4f53\u7ba1\u7406\u5668\u63d0\u4f9b\u5b9e\u4f53\u7ba1\u7406\u5668\u5de5\u5382\u3002<\/li>\n
- \u83b7\u53d6CriteriaBuilder – \u8fd4\u56de\u4e00\u4e2aCriteriaBuilder\u5b9e\u4f8b\uff0c\u7528\u4e8e\u521b\u5efaCriteriaQuery\u5bf9\u8c61\u3002<\/li>\n
- \u83b7\u53d6\u5143\u6a21\u578b – \u8fd4\u56de\u4e00\u4e2aMetamodel\u63a5\u53e3\u5b9e\u4f8b\uff0c\u7528\u4e8e\u8bbf\u95ee\u6301\u4e45\u5355\u5143\u7684\u5143\u6a21\u578b\u3002<\/li>\n
- \u521b\u5efaEntityGraph – \u8fd4\u56de\u4e00\u4e2a\u53ef\u53d8\u7684EntityGraph\uff0c\u7528\u4e8e\u52a8\u6001\u521b\u5efaEntityGraph\u3002<\/li>\n
- \u83b7\u53d6EntityGraph – \u8fd4\u56de\u4e00\u4e2a\u547d\u540d\u7684EntityGraph\u5b9e\u4f8b\u3002<\/li>\n<\/ol>\n
\u8ba9\u6211\u4eec\u901a\u8fc7EntityManager\u793a\u4f8b\u9879\u76ee\u6765\u770b\u4e00\u4e9b\u65b9\u6cd5\u3002<\/p>\n
Hibernate EntityManager \u793a\u4f8b<\/h3>\n
![\"JPA](\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564842aa4b2f92e6c72fab1\/8-0.png\" "\\"\\"")
<\/p>\nCREATE TABLE `employee` (\r\n `employee_id` int(11) unsigned NOT NULL AUTO_INCREMENT,\r\n `employee_name` varchar(32) NOT NULL DEFAULT '',\r\n PRIMARY KEY (`employee_id`)\r\n) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;\r\n<\/code><\/pre>\n\u8fd9\u662f\u4e00\u5f20\u975e\u5e38\u7b80\u5355\u7684\u8868\u683c\uff0c\u4f46\u975e\u5e38\u9002\u5408\u6211\u4eec\u7684\u793a\u4f8b\u6765\u5c55\u793aEntityManager\u7684\u4f7f\u7528\u3002<\/p>\n
Hibernate\u7684Maven\u4f9d\u8d56<\/h3>\n
\u6211\u4eec\u9700\u8981\u5728\u6211\u4eec\u7684pom.xml\u6587\u4ef6\u4e2d\u6dfb\u52a0Hibernate\u548cMySQL java\u9a71\u52a8\u7684\u4f9d\u8d56\u9879\u3002\u6211\u6b63\u5728\u4f7f\u7528Hibernate 5\u4e0e\u6700\u65b0\u7248\u672c\u7684mysql-connector-java jar\u3002<\/p>\n
<project xmlns=\"https:\/\/maven.apache.org\/POM\/4.0.0\" xmlns:xsi=\"https:\/\/www.w3.org\/2001\/XMLSchema-instance\"\r\n\txsi:schemaLocation=\"https:\/\/maven.apache.org\/POM\/4.0.0 https:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\">\r\n\t<modelVersion>4.0.0<\/modelVersion>\r\n\r\n\t<groupId>com.Olivia.hibernate<\/groupId>\r\n\t<artifactId>hibernate-entitymanager<\/artifactId>\r\n\t<version>0.0.1-SNAPSHOT<\/version>\r\n\t<packaging>jar<\/packaging>\r\n\r\n\t<name>hibernate-entitymanager<\/name>\r\n\t<url>https:\/\/maven.apache.org<\/url>\r\n\r\n\t<properties>\r\n\t\t<project.build.sourceEncoding>UTF-8<\/project.build.sourceEncoding>\r\n\t<\/properties>\r\n\r\n\t<dependencies>\r\n\t\t<!-- MySQL connector -->\r\n\t\t<dependency>\r\n\t\t\t<groupId>mysql<\/groupId>\r\n\t\t\t<artifactId>mysql-connector-java<\/artifactId>\r\n\t\t\t<version>6.0.5<\/version>\r\n\t\t<\/dependency>\r\n\t\t<!-- Hibernate 5.2.6 Final -->\r\n\t\t<dependency>\r\n\t\t\t<groupId>org.hibernate<\/groupId>\r\n\t\t\t<artifactId>hibernate-core<\/artifactId>\r\n\t\t\t<version>5.2.6.Final<\/version>\r\n\t\t<\/dependency>\r\n\t\t<dependency>\r\n\t\t\t<groupId>junit<\/groupId>\r\n\t\t\t<artifactId>junit<\/artifactId>\r\n\t\t\t<version>3.8.1<\/version>\r\n\t\t\t<scope>test<\/scope>\r\n\t\t<\/dependency>\r\n\t<\/dependencies>\r\n\r\n\t<build>\r\n\t\t<sourceDirectory>src\/main\/java<\/sourceDirectory>\r\n\t\t<plugins>\r\n\t\t\t<plugin>\r\n\t\t\t\t<artifactId>maven-compiler-plugin<\/artifactId>\r\n\t\t\t\t<version>3.5.1<\/version>\r\n\t\t\t\t<configuration>\r\n\t\t\t\t\t<source>1.8<\/source>\r\n\t\t\t\t\t<target>1.8<\/target>\r\n\t\t\t\t<\/configuration>\r\n\t\t\t<\/plugin>\r\n\t\t<\/plugins>\r\n\t<\/build>\r\n<\/project>\r\n<\/code><\/pre>\nHibernate\u7684\u6301\u4e45\u5316XML\u6587\u4ef6<\/h3>\n
\u4f7f\u7528Hibernate\u6700\u91cd\u8981\u7684\u90e8\u5206\u5c31\u662f\u63d0\u4f9b\u4e00\u4e2apersistence.xml\u6587\u4ef6\u3002\u8fd9\u4e2axml\u6587\u4ef6\u5305\u542b\u4e86\u8fde\u63a5\u6570\u636e\u5e93\u7684\u914d\u7f6e\u3002<\/p>\n
<persistence xmlns=\"https:\/\/xmlns.jcp.org\/xml\/ns\/persistence\"\r\n\txmlns:xsi=\"https:\/\/www.w3.org\/2001\/XMLSchema-instance\"\r\n\txsi:schemaLocation=\"https:\/\/xmlns.jcp.org\/xml\/ns\/persistence\r\n https:\/\/xmlns.jcp.org\/xml\/ns\/persistence\/persistence_2_1.xsd\"\r\n\tversion=\"2.1\">\r\n\r\n\t<persistence-unit name=\"persistence\">\r\n\t\t<description>Hibernate\u5b9e\u4f53\u7ba1\u7406\u5668\u793a\u4f8b<\/description>\r\n\t\t<provider>org.hibernate.jpa.HibernatePersistenceProvider<\/provider>\r\n\r\n\t\t<properties>\r\n\t\t\t<property name=\"javax.persistence.jdbc.driver\" value=\"com.mysql.jdbc.Driver\" \/>\r\n\t\t\t<property name=\"javax.persistence.jdbc.url\" value=\"jdbc:mysql:\/\/localhost:3306\/Test\" \/>\r\n\t\t\t<property name=\"javax.persistence.jdbc.user\" value=\"scdev\" \/>\r\n\t\t\t<property name=\"javax.persistence.jdbc.password\" value=\"scdev\" \/>\r\n\t\t\t<property name=\"hibernate.show_sql\" value=\"true\" \/>\r\n\t\t<\/properties>\r\n\r\n\t<\/persistence-unit>\r\n\r\n<\/persistence>\r\n<\/code><\/pre>\n- \n
- hibernate.show_sql\u7528\u4e8e\u544a\u8bc9hibernate\u5c06SQL\u67e5\u8be2\u6253\u5370\u5230\u65e5\u5fd7\u6587\u4ef6\u6216\u63a7\u5236\u53f0\u3002<\/li>\n
- \u6700\u91cd\u8981\u7684\u914d\u7f6e\u662f\u63d0\u4f9b\u8005\u7c7b\uff0c\u5373org.hibernate.jpa.HibernatePersistenceProvider\u3002\u8fd9\u5c31\u662fHibernate\u5982\u4f55\u88ab\u6302\u63a5\u5230\u6211\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f5c\u4e3aJPA\u5b9e\u73b0\u4f7f\u7528\u7684\u65b9\u5f0f\u3002<\/li>\n
- \u6709\u7528\u4e8e\u8fde\u63a5\u5230\u6570\u636e\u5e93\u548c\u8981\u4f7f\u7528\u7684\u9a71\u52a8\u7a0b\u5e8f\u7684\u5c5e\u6027\u3002<\/li>\n
- \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cpersistence.xml\u5e94\u8be5\u653e\u5728META-INF\u76ee\u5f55\u4e2d\uff0c\u6b63\u5982\u60a8\u4ece\u9879\u76ee\u56fe\u50cf\u4e2d\u770b\u5230\u7684\u90a3\u6837\u3002<\/li>\n<\/ul>\n
\u9690\u85cf\u5f0f\u5b9e\u4f53Bean<\/h3>\n
JPA\u7684EntityManager – Hibernate\u7684EntityManager\uff08\u7b2c3\u90e8\u5206\uff0c\u51713\u90e8\u5206\uff09<\/h3>\n
\u6211\u4eec\u73b0\u5728\u5c06\u521b\u5efa\u4e00\u4e2a\u4e0e\u6570\u636e\u5e93\u4e2d\u521b\u5efa\u7684\u96c7\u5458\u8868\u76f8\u5bf9\u5e94\u7684Employee.java\u7c7b\u3002\u4f7f\u7528@Entity\u6ce8\u89e3\u5c06\u5458\u5de5\u7c7b\u58f0\u660e\u4e3a\u5b9e\u4f53\u3002<\/p>\n
package com.Olivia.jpa.hibernate.model;\r\n\r\nimport javax.persistence.Column;\r\nimport javax.persistence.Entity;\r\nimport javax.persistence.GeneratedValue;\r\nimport javax.persistence.GenerationType;\r\nimport javax.persistence.Id;\r\nimport javax.persistence.Table;\r\n\r\n@Entity\r\n@Table(name = \"employee\")\r\npublic class Employee {\r\n\tprivate int employeeId;\r\n\r\n\tprivate String name;\r\n\r\n\t@Id\r\n\t@Column(name = \"employee_id\")\r\n\t@GeneratedValue(strategy = GenerationType.IDENTITY)\r\n\tpublic int getEmployeeId() {\r\n\t\treturn employeeId;\r\n\t}\r\n\r\n\tpublic void setEmployeeId(int employeeId) {\r\n\t\tthis.employeeId = employeeId;\r\n\t}\r\n\r\n\t@Column(name = \"employee_name\")\r\n\tpublic String getName() {\r\n\t\treturn name;\r\n\t}\r\n\r\n\tpublic void setName(String name) {\r\n\t\tthis.name = name;\r\n\t}\r\n\r\n\t@Override\r\n\tpublic String toString() {\r\n\t\treturn \"Employee [employeeId=\" + employeeId + \", name=\" + name + \"]\";\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n\u73b0\u5728\u662f\u65f6\u5019\u521b\u5efa\u6211\u4eec\u7684\u4e3b\u7a0b\u5e8f\u5e76\u4f7f\u7528EntityManager\u65b9\u6cd5\u8fd0\u884c\u4e00\u4e9b\u67e5\u8be2\u4e86\u3002<\/p>\n
package com.Olivia.jpa.hibernate.main;\r\n\r\nimport java.util.List;\r\n\r\nimport javax.persistence.EntityManager;\r\nimport javax.persistence.EntityManagerFactory;\r\nimport javax.persistence.Persistence;\r\n\r\nimport com.Olivia.jpa.hibernate.model.Employee;\r\n\r\npublic class App {\r\n\tpublic static void main(String[] args) {\r\n\t\t\/\/ \u521b\u5efaEntityManagerFactory\u5b9e\u4f8b\r\n\t\tEntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory(\"persistence\");\r\n\t\t\/\/ \u521b\u5efaEntityManager\u5b9e\u4f8b\r\n\t\tEntityManager entityManager = entityManagerFactory.createEntityManager();\r\n\r\n\t\tSystem.out.println(\"\u5f00\u59cb\u4e8b\u52a1\");\r\n\t\t\/\/ \u5f00\u59cb\u4e8b\u52a1\r\n\t\tentityManager.getTransaction().begin();\r\n\t\tEmployee employee = new Employee();\r\n\t\temployee.setName(\"Pankaj\");\r\n\t\tSystem.out.println(\"\u4fdd\u5b58\u5458\u5de5\u5230\u6570\u636e\u5e93\");\r\n\r\n\t\t\/\/ \u6301\u4e45\u5316\u5458\u5de5\u5bf9\u8c61\u5230\u6570\u636e\u5e93\r\n\t\tentityManager.persist(employee);\r\n\t\t\/\/ \u63d0\u4ea4\u4e8b\u52a1\r\n\t\tentityManager.getTransaction().commit();\r\n\t\tSystem.out.println(\"\u751f\u6210\u7684\u5458\u5de5ID = \" + employee.getEmployeeId());\r\n\r\n\t\t\/\/ \u4f7f\u7528\u4e3b\u952e\u83b7\u53d6\u5bf9\u8c61\r\n\t\tEmployee emp = entityManager.find(Employee.class, employee.getEmployeeId());\r\n\t\tSystem.out.println(\"\u83b7\u53d6\u5bf9\u8c61 \" + emp.getName() + \" \" + emp.getEmployeeId());\r\n\r\n\t\t\/\/ \u4eceEmployee\u8868\u4e2d\u83b7\u53d6\u6240\u6709\u5bf9\u8c61\r\n\t\t@SuppressWarnings(\"unchecked\")\r\n\t\tList<Employee> listEmployee = entityManager.createQuery(\"SELECT e FROM Employee e\").getResultList();\r\n\r\n\t\tif (listEmployee == null) {\r\n\t\t\tSystem.out.println(\"\u672a\u627e\u5230\u5458\u5de5\");\r\n\t\t} else {\r\n\t\t\tfor (Employee empl : listEmployee) {\r\n\t\t\t\tSystem.out.println(\"\u5458\u5de5\u59d3\u540d= \" + empl.getName() + \", \u5458\u5de5ID \" + empl.getEmployeeId());\r\n\t\t\t}\r\n\t\t}\r\n\t\t\/\/ \u5220\u9664\u5b9e\u4f53\r\n\t\tentityManager.getTransaction().begin();\r\n\t\tSystem.out.println(\"\u5220\u9664ID\u4e3a \" + emp.getEmployeeId() + \" \u7684\u5458\u5de5\");\r\n\t\tentityManager.remove(emp);\r\n\t\tentityManager.getTransaction().commit();\r\n\r\n\t\t\/\/ \u5173\u95ed\u5b9e\u4f53\u7ba1\u7406\u5668\r\n\t\tentityManager.close();\r\n\t\tentityManagerFactory.close();\r\n\r\n\t}\r\n}\r\n<\/code><\/pre>\n- \n
- Persistence.createEntityManagerFactory\u5c06\u4f7f\u7528\u6211\u4eec\u5728persistence.xml\u6587\u4ef6\u4e2d\u63d0\u4f9b\u7684\u6301\u4e45\u6027\u5355\u5143\uff0c\u63d0\u4f9bEntityManagerFactory\u5b9e\u4f8b\u3002<\/li>\n
- entityManagerFactory.createEntityManager()\u5c06\u4e3a\u6211\u4eec\u521b\u5efa\u4e00\u4e2aEntityManager\u5b9e\u4f8b\u4f9b\u6211\u4eec\u4f7f\u7528\u3002\u6bcf\u6b21\u8c03\u7528createEntityManager()\u65b9\u6cd5\uff0c\u5b83\u90fd\u4f1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684EntityManager\u5b9e\u4f8b\u3002<\/li>\n
- entityManager.getTransaction().begin()\u65b9\u6cd5\u9996\u5148\u4ece\u5f53\u524d\u6301\u4e45\u5316\u4e0a\u4e0b\u6587\u4e2d\u83b7\u53d6\u4e8b\u52a1\uff0c\u7136\u540e\u4f7f\u7528begin()\u65b9\u6cd5\u5f00\u59cb\u4e8b\u52a1\u3002<\/li>\n
- entityManager.persist(employee)\u7528\u4e8e\u5c06employee\u5bf9\u8c61\u6301\u4e45\u5316\u5230\u6570\u636e\u5e93\u4e2d\u3002<\/li>\n
- entityManager.getTransaction().commit()\u65b9\u6cd5\u7528\u4e8e\u83b7\u53d6\u4e8b\u52a1\uff0c\u7136\u540e\u63d0\u4ea4\u76f8\u540c\u7684\u4e8b\u52a1\u3002\u8fd9\u5c06\u63d0\u4ea4\u6240\u6709\u5bf9\u6570\u636e\u5e93\u7684\u66f4\u6539\u3002<\/li>\n
- entityManager.find()\u7528\u4e8e\u4f7f\u7528\u4e3b\u952e\u5728\u6570\u636e\u5e93\u4e2d\u67e5\u627e\u5b9e\u4f53\u3002<\/li>\n
- \u5982\u679c\u8981\u7f16\u5199\u81ea\u5b9a\u4e49\u67e5\u8be2\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528entityManager.createQuery()\u65b9\u6cd5\u3002\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u91cd\u8981\u4e00\u70b9\u662f\uff0ccreateQuery()\u65b9\u6cd5\u5c06\u4f7f\u7528\u5b9e\u4f53\u7c7b\u4e2d\u7ed9\u5b9a\u7684\u540d\u79f0\uff0c\u800c\u4e0d\u662f\u5b9e\u9645\u7684\u8868\u540d\u3002<\/li>\n
- entityManager.remove()\u53ea\u6709\u5728\u9700\u8981\u4ece\u6570\u636e\u5e93\u4e2d\u5220\u9664\u5b9e\u4f53\u65f6\u624d\u5e94\u8be5\u4f7f\u7528\u3002<\/li>\n
- entityManager.close()\u7528\u4e8e\u5173\u95ed\u5b9e\u4f53\u7ba1\u7406\u5668\u3002\u540c\u6837entityManagerFactory.close()\u7528\u4e8e\u5173\u95edEntityManagerFactory\u3002\u6211\u4eec\u5e94\u8be5\u5c3d\u5feb\u5173\u95ed\u8fd9\u4e9b\u8d44\u6e90\u3002<\/li>\n<\/ol>\n
\u4ee5\u4e0b\u662f\u4e0a\u8ff0\u7a0b\u5e8f\u4e00\u6b21\u6837\u672c\u8fd0\u884c\u4ea7\u751f\u7684\u8f93\u51fa\u7ed3\u679c\u3002<\/p>\n
\u5f00\u59cb\u4e8b\u52a1\r\n\u4fdd\u5b58\u5458\u5de5\u5230\u6570\u636e\u5e93\r\nHibernate: insert into employee (employee_name) values (?)\r\n\u751f\u6210\u7684\u5458\u5de5ID = 11\r\n\u83b7\u53d6\u5bf9\u8c61 Pankaj 11\r\n2017\u5e7412\u670807\u65e5 \u4e0b\u53481:05:23 org.hibernate.hql.internal.QueryTranslatorFactoryInitiator initiateService\r\n\u4fe1\u606f: HHH000397: Using ASTQueryTranslatorFactory\r\nHibernate: select employee0_.employee_id as employee1_0_, employee0_.employee_name as employee2_0_ from employee employee0_\r\n\u5458\u5de5\u59d3\u540d= Test, \u5458\u5de5ID 5\r\n\u5458\u5de5\u59d3\u540d= Pankaj, \u5458\u5de5ID 6\r\n\u5458\u5de5\u59d3\u540d= Pankaj, \u5458\u5de5ID 11\r\n\u5220\u9664ID\u4e3a 11 \u7684\u5458\u5de5\r\nHibernate: delete from employee where employee_id=?\r\n<\/code><\/pre>\n\u6ce8\u610f\u5f53\u5458\u5de5ID\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u5e76\u6620\u5c04\u56de\u5bf9\u8c61\u65f6\u7684\u751f\u6210\u65b9\u5f0f\u3002\u8fd8\u8981\u6ce8\u610f\u5728\u63a7\u5236\u53f0\u4e2d\u6253\u5370\u7684SQL\u67e5\u8be2\u8bed\u53e5\u3002\u8bf7\u6ce8\u610f\uff0cHibernate\u4f1a\u521b\u5efa\u66f4\u591a\u7684\u65e5\u5fd7\uff0c\u4f46\u6211\u6ca1\u6709\u5728\u8fd9\u91cc\u653e\u7f6e\u5b83\u4eec\u4ee5\u4fdd\u6301\u53ef\u8bfb\u6027\u3002\u5173\u4e8e JPA EntityManager \u7684\u793a\u4f8b\u4ee5\u53ca\u5176\u4e0e Hibernate \u7684\u5b9e\u73b0\uff0c\u8bf7\u53c2\u8003\u4ee5\u4e0b\u94fe\u63a5\u4e0b\u8f7d\u6700\u7ec8\u7684Hibernate EntityManager\u793a\u4f8b\u9879\u76ee\u3002<\/p>\n