Question

目前我正在尝试将spring boot添加到现有项目中这个项目是一个独立的jar，成功地使用了spring jpa和hibernate。但是因为应用程序必须能够接收和发送json文件，所以我认为spring boot是最好的选择。

因此，我将以下依赖项添加到pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>1.4.0.RELEASE</version>
</dependency>

并设置一个RequestMapping作为测试

@Controller
public class RequestMappingController {
    @RequestMapping("/")
    @ResponseBody
    public String myAction() {
        return "Hello World !";
    }
}

现在我遇到了问题，我的所有来源（this，this和this）都告诉我接下来要设置主要方法。
像

这样的东西

public static void main(String[] args) {
    SpringApplication.run(Main.class, args);
}

但我无法改变那种方法。我的架构使用一个主jar文件，它将组件和插件作为jar文件加载。主jar文件已下载，不由我编程。

main.jar          (downloaded)
|- plugin1.jar    (programmed by me)
|- plugin2.jar    (programmed by me)
|- ...

我没有使用任何xml文件（pom.xml file of course) to configure spring. In my plugin1.jar there is a JpaConfig Class with all the important spring enabling annotations ( @ EnableScheduling , @ EnableAsync , transactionmanagement, component scan, @Configuration , jpa repository enabling, ...) I recognices that there is also a annotation @ SpringBootConfiguration除外并且因为我的plugin1能够激活此Configuration类中所有当前实现的spring组件，也许我可以在那里设置spring boot？（有没有办法？或者其他方式使用第二个配置类？）

这是我的问题：如何在不改变main(String[] args)方法的情况下在现有项目结构中启用spring boot？

Answer 1

将此添加到您的pom.xml

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.2.RELEASE</version>
</parent>

编辑： POM：

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.2.RELEASE</version>
    </parent>

    <dependencies>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

那就是你需要为数据库的连接信息提供一个连接器和一个application.properties。例如：

# database
spring.datasource.url= jdbc:mysql://****
spring.datasource.username=****
spring.datasource.password=****

#ddl generation
spring.jpa.hibernate.ddl-auto=update

# Keep the connection alive if idle for a long time (needed in production)
spring.datasource.testWhileIdle = true
spring.datasource.testOnBorrow=true
spring.datasource.timeBetweenEvictionRunsMillis = 3600000
spring.datasource.validationQuery = SELECT 1

# Number of ms to wait before throwing an exception if no connection is available.
spring.datasource.max-wait=10000

# Maximum number of active connections that can be allocated from this pool at the same time.
spring.datasource.max-active=50

# Show or not log for each sql query
spring.jpa.show-sql = true

# Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy

# Use spring.jpa.properties.* for Hibernate native properties (the prefix is
# stripped before adding them to the entity manager)

# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

将spring boot添加到现有项目而不更改main（args []）方法

1 个答案: