Question

默认情况下，Spring Boot Starter Data JPA依赖项确实具有一些好的配置，它只是从我的application.properties中选择信息，对吧？

不幸的是，我的项目无法识别其配置。我被迫做一个配置类来运行我的项目。我的Eclipse也没有显示任何pom.xml错误。在我的pom.xml中，我仅得到以下警告：托管版本为2.0.2.RELEASE工件在org.springframework.boot:spring-boot-dependencies:2.0.2.RELEASE

中进行管理

这是我的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>

<groupId>com.jequiti</groupId>
<artifactId>Projeto</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>IntegraPedidos</name>
<description>Demo project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.2.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-rest</artifactId>
    </dependency>
    <!-- JDBC -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.restdocs</groupId>
        <artifactId>spring-restdocs-mockmvc</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>5.2.4.Final</version>
    </dependency>
    <dependency>
        <groupId>com.oracle</groupId>
        <artifactId>ojdbc6</artifactId>
        <version>11.2.0.3</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-dbcp2</artifactId>
        <version>2.5.0</version>
    </dependency>
</dependencies>

<!-- Repository for ORACLE JDBC Driver -->
<repositories>
    <!-- Repository for ORACLE JDBC Driver -->
    <repository>
        <id>codelds</id>
        <url>https://code.lds.org/nexus/content/groups/main-repo</url>
    </repository>
</repositories>

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

这是我的属性文件：

#===============================
#JPA / HIBERNATE
#===============================
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=none
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.Oracle10gDialect
spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate5.SpringSessionContext
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

Answer 1

您应该使用以下属性来使spring数据jpa正常工作。

spring.jpa.hibernate.ddl-auto = none
spring.jpa.properties.hibernate.show_sql = true
spring.jpa.properties.hibernate.format_sql = true

设置ddl-auto = none不会更改您的数据库架构，即使您的“映射实体”类已更改。除非您确实确定要达到的目标，否则不建议使用none。

设置show_sql = true将记录由hibernate执行的sql语句。

设置format_sql = true会将sql语句日志格式化为更易读的形式。但是，这并不是打印日志的必要步骤。只是为了提高可读性。

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