從 spring 工具套件連接到數據庫時出錯

Question

創建名為“org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration”的bean時出錯：通過構造函數參數0表示的依賴關系不滿足； 嵌套異常是 org.springframework.beans.factory.BeanCreationException：創建名稱為“dataSource”的 bean 時出錯; 嵌套異常是 org.springframework.beans.BeanInstantiationException：無法實例化 [com.zaxxer.hikari.HikariDataSource]：工廠方法 'dataSource' 拋出異常； 嵌套異常是 java.lang.IllegalStateException: 無法加載驅動程序 class: oracle.Z84BEFFD3A0D49AdriverCE7663

pom.xml 文件 https://maven.apache.org/xsd/maven-4.0.0.xsd">4.

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.6.RELEASE</version>
</parent>
<groupId>com.Projectdashboardtool</groupId>
<artifactId>Project</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Project</name>
<description>Demo project for Spring Boot</description>

<properties>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <!-- <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jersey</artifactId>
    </dependency> -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>

    <!-- <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web-services</artifactId>
    </dependency> -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>com.oracle</groupId>
        <artifactId>ojdbc8</artifactId>
        <version>12.1.0</version>      
    </dependency> 

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

Controller class

@RestController
@RequestMapping("/project")
public class ProjectController {

    @Autowired
    private ProjectRepository projectRepository;

    @GetMapping
    public List<Project> list(){
        //List<Project> project=new ArrayList<>();
        return projectRepository.findAll();
    }

    @PostMapping
    @ResponseStatus(HttpStatus.OK)
    public void create(@RequestBody Project project) {
        projectRepository.save(project);

    }

    @GetMapping("/{id}")
    public Project get(@PathVariable("id") long id) {
        return projectRepository.getOne(id);

    }
}

Model class

package com.Projectdashboardtool.Project.Model;

import java.sql.Date;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

@Entity
@JsonIgnoreProperties({"hiberanateLazyInitializer", "handler"})
public class Project {
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Long id;
    private String dg_number;
    private String project;
    private String release_level;
    private String release_area;
    private String release_number;

    @JsonFormat(shape=JsonFormat.Shape.STRING, pattern="dd-MM-yyyy")
    private Date planned_release_date;
    private Date release_date;

    public String getDg_number() {
        return dg_number;
    }
    public void setDg_number(String dg_number) {
        this.dg_number = dg_number;
    }
    public String getProject() {
        return project;
    }
    public void setProject(String project) {
        this.project = project;
    }
    public String getRelease_level() {
        return release_level;
    }
    public void setRelease_level(String release_level) {
        this.release_level = release_level;
    }
    public String getRelease_area() {
        return release_area;
    }
    public void setRelease_area(String release_area) {
        this.release_area = release_area;
    }
    public String getRelease_number() {
        return release_number;
    }
    public void setRelease_number(String release_number) {
        this.release_number = release_number;
    }
    public Date getPlanned_release_date() {
        return planned_release_date;
    }
    public void setPlanned_release_date(Date planned_release_date) {
        this.planned_release_date = planned_release_date;
    }
    public Date getRelease_date() {
        return release_date;
    }
    public void setRelease_date(Date release_date) {
        this.release_date = release_date;
    }
    public String getRelease_type() {
        return release_type;
    }
    public void setRelease_type(String release_type) {
        this.release_type = release_type;
    }
    private String release_type;

    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    @Override
    public String toString() {
        return "Project [id=" + id + ", dg_number=" + dg_number + ", project=" + project + ", release_level="
                + release_level + ", release_area=" + release_area + ", release_number=" + release_number
                + ", planned_release_date=" + planned_release_date + ", release_date=" + release_date
                + ", release_type=" + release_type + "]";
    }

}

application.properties file
spring.jpa.hibernate.ddl-auto=update
spring.jpa.database-platform=org.hibernate.dialect.SQLServer2012Dialect
spring.datasource.url=jdbc:oracle:thin:@//hostname/servicename
spring.datasource.username=username
spring.datasource.password=password
spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver

Answer 1

添加依賴：

<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>ojdbc8</artifactId>
    <version>12.1.0</version>      
</dependency>

並且正確的 hibernate 方言 - org.hibernate.dialect.OracleDialect應該可以工作。

Answer 2

我認為您正在使用 DB oracle 的屬性文件。 從您的異常中，我可以看到 spring 引導無法加載 oracle 驅動程序。 因此，從 Oracle 網站下載 ojdbc6.jar 或者如果您在本地系統中安裝 oracle11g，您可以在 jdb.lib 文件夾中找到 ojdbc。

將此添加到您的項目中，在 eclipse 上右鍵單擊項目 --> 構建路徑 --> 添加此 jar。

因此，假設您使用 spring 引導將此依賴項添加到您的 pom.xml

<dependency>
 <groupId>com.oracle</groupId>
 <artifactId>ojdbc6</artifactId>
 <version>11.2.0</version>//add letest version
</dependency>

假設如果 maven 未檢測到您的依賴項，請按照以下步驟操作：-

運行此命令

mvn install:install-file - Dfile=C:\Users\user\.m2\repository\com\oracle\ojdbc6\11.2.0\ojdbc6.jar -DgroupId=com.oracle -DartifactId=ojdbc6 -Dversion=11.2.0 -Dpackaging=jar

然后你可以使用這個。

Answer 3

Oracle JDBC 驅動程序可在中央 Maven 上獲得。 看看這個博客。 您可以為 18.3 JDBC 驅動程序添加此 GAV。

<groupId>com.oracle.database.jdbc</groupId>
<artifactId>ojdbc8</artifactId>
<version>18.3.0.0</version>