Java 与Tomcat和gradle一起冬眠
免责声明:我是Java新手。 我正在尝试用Tomcat和Gradle设置Hibernate。生成运行正常,但似乎未读取Java 与Tomcat和gradle一起冬眠,java,hibernate,tomcat,gradle,tomcat7,Java,Hibernate,Tomcat,Gradle,Tomcat7,免责声明:我是Java新手。 我正在尝试用Tomcat和Gradle设置Hibernate。生成运行正常,但似乎未读取persistence.xml文件 我的项目结构如下: ├── build.gradle └── src └── main ├── java │ └── com │ └── test │ ├── domain │ │ └── Person.java │
persistence.xml
文件
我的项目结构如下:
├── build.gradle
└── src
└── main
├── java
│ └── com
│ └── test
│ ├── domain
│ │ └── Person.java
│ └── web
│ └── EventManagerServlet.java
└── webapp
├── META-INF
│ └── web.xml
└── WEB-INF
└── classes
└── persistence.xml
build.gradle
文件的内容:
apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'tomcat'
apply plugin: 'war'
sourceCompatibility = 1.5
version = '1.0'
repositories {
mavenCentral()
}
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'org.gradle.api.plugins:gradle-tomcat-plugin:1.2.3'
}
}
dependencies {
compile 'javax.servlet:javax.servlet-api:3.0.1'
compile group: 'org.hibernate', name: 'hibernate-core', version: '4.3.5.Final'
compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.13'
def tomcatVersion = '7.0.11'
tomcat "org.apache.tomcat.embed:tomcat-embed-core:${tomcatVersion}",
"org.apache.tomcat.embed:tomcat-embed-logging-juli:${tomcatVersion}"
tomcat("org.apache.tomcat.embed:tomcat-embed-jasper:${tomcatVersion}") {
exclude group: 'org.eclipse.jdt.core.compiler', module: 'ecj'
}
}
war {
webXml = file('src/main/webapp/META-INF/web.xml')
}
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="com" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.test.domain.Person</class>
<properties>
<property name="hibernate.archive.autodetection" value="class, hbm"/>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.default_schema">hibernate</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto" value="create"/>
<property name="hibernate.c3p0.min_size" value="5"/>
<property name="hibernate.c3p0.max_size" value="20"/>
<property name="hibernate.c3p0.timeout" value="300"/>
<property name="hibernate.c3p0.max_statements" value="50"/>
<property name="hibernate.c3p0.idle_test_period" value="3000"/>
</properties>
</persistence-unit>
</persistence>
EventManagerServlet
类:
package com.test.web;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.servlet.ServletException;
import javax.servlet.http.*;
import java.io.IOException;
public class EventManagerServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("com");
EntityManager entityManager = entityManagerFactory.createEntityManager();
}
}
persistence.xml
文件:
apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'tomcat'
apply plugin: 'war'
sourceCompatibility = 1.5
version = '1.0'
repositories {
mavenCentral()
}
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'org.gradle.api.plugins:gradle-tomcat-plugin:1.2.3'
}
}
dependencies {
compile 'javax.servlet:javax.servlet-api:3.0.1'
compile group: 'org.hibernate', name: 'hibernate-core', version: '4.3.5.Final'
compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.13'
def tomcatVersion = '7.0.11'
tomcat "org.apache.tomcat.embed:tomcat-embed-core:${tomcatVersion}",
"org.apache.tomcat.embed:tomcat-embed-logging-juli:${tomcatVersion}"
tomcat("org.apache.tomcat.embed:tomcat-embed-jasper:${tomcatVersion}") {
exclude group: 'org.eclipse.jdt.core.compiler', module: 'ecj'
}
}
war {
webXml = file('src/main/webapp/META-INF/web.xml')
}
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="com" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.test.domain.Person</class>
<properties>
<property name="hibernate.archive.autodetection" value="class, hbm"/>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.default_schema">hibernate</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto" value="create"/>
<property name="hibernate.c3p0.min_size" value="5"/>
<property name="hibernate.c3p0.max_size" value="20"/>
<property name="hibernate.c3p0.timeout" value="300"/>
<property name="hibernate.c3p0.max_statements" value="50"/>
<property name="hibernate.c3p0.idle_test_period" value="3000"/>
</properties>
</persistence-unit>
</persistence>
war目录结构:
├── META-INF
│ ├── MANIFEST.MF
│ └── web.xml
└── WEB-INF
├── classes
│ ├── com
│ │ └── test
│ │ ├── domain
│ │ │ └── Person.class
│ │ └── web
│ │ └── EventManagerServlet.class
│ └── persistence.xml
├── lib
│ ├── antlr-2.7.7.jar
│ ├── dom4j-1.6.1.jar
│ ├── hibernate-commons-annotations-4.0.4.Final.jar
│ ├── hibernate-core-4.3.5.Final.jar
│ ├── hibernate-jpa-2.1-api-1.0.0.Final.jar
│ ├── jandex-1.1.0.Final.jar
│ ├── javassist-3.18.1-GA.jar
│ ├── javax.servlet-api-3.0.1.jar
│ ├── jboss-logging-3.1.3.GA.jar
│ ├── jboss-logging-annotations-1.2.0.Beta1.jar
│ ├── jboss-transaction-api_1.2_spec-1.0.0.Final.jar
│ ├── mysql-connector-java-5.1.13.jar
│ └── xml-apis-1.0.b2.jar
└── web.xml
编辑
我必须添加build.gradle
classpath 'org.hibernate:hibernate-entitymanager:4.1.7.Final'
persistence.xml
文件需要进入War的WEB-INF/classes/META-INF/
目录。实现这一点的最佳方法是将其放入src/main/resources/META-INF/
中。如果您还希望在测试(运行类目录而不是Jar或War)中使用此功能,您还需要配置:
sourceSets.all {
output.resourcesDir = output.classesDir
}
以上配置是必需的,因为JPA希望在相同的类目录或归档中找到persistence.xml
文件和相应的实体类,但Gradle默认为类和资源使用不同的输出目录
PS:我假设
main
目录位于src
下,而不是第一张图中所示的src
的兄弟目录。谢谢,这解决了问题。我试着把persistence.xml
放在/WEB-INF/classes/META-INF
中,结果效果非常好,它救了我,谢谢。根据Gradle 4.0,此解决方案将失败,因此我们还需要找到另一个解决方案。 <代码>>配置项目:Gradle现在为每种JVM语言使用单独的输出目录,但此构建假定源集中的所有类都有一个目录。此行为已被弃用,计划在Gradle 5.0中删除