1
我一直在嘗試學習Spring的最後三個星期做一些簡單的練習，但即使閱讀至少15個不同的教程和閱讀很多StackOverflow的答案我不能使這項工作：Spring Boot CRUD + Hibernate + JSP/JSON - 不能把它放在一起
我要讓具有以下特徵的「簡單」的應用：
- 能夠給與一些CSS JSP頁面響應和js（在外部文件中）瀏覽時
/carsweb; - 瀏覽到
/carsjson時能夠返回JSON。這個迴應必須是實體「汽車」列表; - 當我們撥打電話
/newcar（Car作爲JSON在請求體內）時，在DB上保存一輛新車。 - 能夠使用Hibernate（在
application.properties文件中的用戶/密碼）從MySQL數據庫中檢索和保存汽車; - 所有這些只使用Spring註解，如果可能的話，沒有配置XML。
我能夠做幾乎所有的事情，但我不能把它放在一起。下面是我在目前的狀態：
SpringBootWebApplication
@SpringBootApplication
public class SpringBootWebApplication extends SpringBootServletInitializer {
public static void main(String[] args) throws Exception {
SpringApplication.run(SpringBootWebApplication.class, args);
}
}
的AppConfig
@Configuration
@ComponentScan(basePackages = "com.facundo")
public class AppConfig {
}
HibernateConfiguration
package com.facundo.configuration;
import java.util.Properties;
import javax.sql.DataSource;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.orm.hibernate4.LocalSessionFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
@ComponentScan({ "com.facundo.configuration" })
@PropertySource(value = { "classpath:application.properties" })
public class HibernateConfiguration {
@Autowired
private Environment environment;
private Properties hibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
return properties;
}
@Bean
public LocalSessionFactoryBean sessionFactory() {
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(dataSource());
sessionFactory.setPackagesToScan(new String[] { "com.mkyong.model" });
sessionFactory.setHibernateProperties(hibernateProperties());
return sessionFactory;
}
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
return dataSource;
}
@Bean
@Autowired
public HibernateTransactionManager transactionManager(SessionFactory s) {
HibernateTransactionManager txManager = new HibernateTransactionManager();
txManager.setSessionFactory(s);
return txManager;
}
}
WelcomeController
@Controller
public class WelcomeController {
@Autowired
private CarService carService;
@RequestMapping(value = "/carsweb", method = RequestMethod.GET)
public String helloHtml(Model model) {
return "welcome2";
}
@RequestMapping(path = "/newcar", method = RequestMethod.POST)
public void postCustomer(@RequestBody Car modelo) {
carService.save(modelo);
}
}
CarDaoImpl
@Repository
public class CarDaoImpl implements CarDao{
@Autowired
private SessionFactory sessionFactory;
@Override
public void save(Car modelo) {
sessionFactory.getCurrentSession().persist(modelo);
}
}
CarPruebaImpl
@Service("prubaService")
@Transactional
public class CarPruebaImpl implements CarService{
@Autowired
private CarDao modeloDao;
@Override
public void save(Car modelo) {
modeloDao.save(modelo);
}
}
的pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-boot-web-jsp</artifactId>
<packaging>war</packaging>
<name>Spring Boot Web JSP Example</name>
<description>Spring Boot Web JSP Example</description>
<version>1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- Web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Web with Tomcat + Embed -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- Need this to compile JSP -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<!-- Need this to compile JSP -->
<dependency>
<groupId>org.eclipse.jdt.core.compiler</groupId>
<artifactId>ecj</artifactId>
<version>4.6.1</version>
<scope>provided</scope>
</dependency>
<!-- Optional, for bootstrap -->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.7</version>
</dependency>
<!-- Persistencia -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
</dependency>
<!-- Hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</dependency>
<!-- MySQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- Joda-Time -->
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
</dependency>
<!-- To map JodaTime with database type -->
<dependency>
<groupId>org.jadira.usertype</groupId>
<artifactId>usertype.core</artifactId>
<version>3.0.0.CR1</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- Package as an executable jar/war -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
應用。屬性：
spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp
jdbc.driverClassName = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/websystique
jdbc.username = root
jdbc.password = MWtqKDeS4I
hibernate.dialect = org.hibernate.dialect.MySQLDialect
hibernate.show_sql = false
hibernate.format_sql = false
所以，這是顯示當我對項目文件夾執行
mvn spring-boot:run
錯誤：
BeanCreationException：org.springframework.beans.factory.UnsatisfiedDependencyException：創建名爲'welcomeController'的bean時出錯：Uns 通過字段'servicioPrueba'表示的未滿足的依賴關係;嵌套的異常是org.springframework.beans.factory.Unsa tisfiedDependencyException：創建名爲'carPruebaImpl'的bean時出錯：通過域名錶示的不滿意的依賴關係 d'modeloDao';嵌套的異常是org.springframework.beans.factory.UnsatisfiedDependencyException：創建名爲'carDaoImpl'的bean 錯誤：通過字段'sessionFactory'表示的不滿足的依賴關係;嵌套異常是org.spring framework.beans.factory.BeanCreationException：在類路徑中定義的名稱爲'sessionFactory'的bean出錯時出錯urce [com/facundo/configuration/HibernateConfiguration.class]：調用init方法失敗;嵌套的例外是JAV a.lang.AbstractMethodError
我想這可以簡化爲：
錯誤創建名爲 'SessionFactory的'
最後，我想說的豆我認爲問題出現在某些配置中@ComponentScan找不到我的文件或類似的東西。
確實有很多需要改進的地方，所以如果你告訴我哪些部件真的有問題，請做。
總之，先謝謝你。
請嘗試以下操作：將「SpringBootWebApplication」類移到包的外部，以便位於應用程序的根包上。不需要具有'AppConfig'和'HibernateConfiguration'，將它們組合成一個Configuration類，並將它與SpringBootWebApplication類一起移到包之外以駐留在根包中。在你的新的Configuartion類中，不需要添加@ @ ComponentScan，因爲@ SpringBootApplication已經包含了這個。 –