知识拓展:看下面图片能够发现有一些标志SHAPSHOT,GA等等
流程:SNAPSHOT->alpha->beta->release->GA
Alpha:是内部测试版,一般不向外部发布,会有很多Bug.一般只有测试人员使用。
Beta:也是测试版,这个阶段的版本会一直加入新的功能。在Alpha版之后推出。
RC:(Release Candidate) 顾名思义么 ! 用在软件上就是候选版本。系统平台上就是发行候选版本。RC版不会再加入新的功能了,主要着重于除错。
GA:General Availability,正式发布的版本,在国外都是用GA来说明release版本的。
详情查看:https://www.cnblogs.com/lexiaofei/p/7065720.html
<!-- Inherit defaults from Spring Boot -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.2.RELEASE</version>
</parent>
<!-- Add typical dependencies for a web application -->
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<!-- Package as an executable jar -->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
创建一个注入的实体bean
package com.yxj.spring;
/**
* @ProjectName: springBootDemo
* @Package: com.yxj.spring
* @Description:
* @Author: 阿杰
* @CreateDate: 2019/1/18 20:22
* @UpdateUser: 暂无
* @UpdateDate: 2019/1/18 20:22
* @UpdateRemark: The modified content
* @Version: 1.0
*/
public class User {
private String userName;
private String passWord;
public String getUserName() {
return userName;
}
public User setUserName(String userName) {
this.userName = userName;
return this;
}
public String getPassWord() {
return passWord;
}
public User setPassWord(String passWord) {
this.passWord = passWord;
return this;
}
}
新建一个main方法,通过@SpringBootApplication和@Bean注解创建bean依赖注入并输出
package com.yxj.spring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
/**
* @ProjectName: springBootDemo
* @Package: com.yxj.spring
* @Description:
* @Author: 阿杰
* @CreateDate: 2019/1/18 20:18
* @UpdateUser: 暂无
* @UpdateDate: 2019/1/18 20:18
* @UpdateRemark: The modified content
* @Version: 1.0
*/
@SpringBootApplication
public class SpringBootTestRun {
@Bean
public User getUserBean(){
return new User();
}
public static void main(String[] args) {
ConfigurableApplicationContext run = SpringApplication.run(SpringBootTestRun.class, args);
System.out.println("-------------分割线---------------");
User getUserBean = run.getBean(User.class);
System.out.println(getUserBean);
}
}
运行main方法,得到输出结果
关于本类中使用的注解标签含义,详情查看:https://www.jianshu.com/p/4e1cab2d8431
springboot会默认去读取
下面的内容,后面会写读取yml这方面的文章。
在maven项目的resource目录下面新建一个application.properties文件
localhost.test.userName=test123
localhost.test.passWord=passWordTest
test.remark=test userName is ${localhost.test.userName}
配置文件加入测试配置key与value值
package com.yxj.spring;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
/**
* @ProjectName: springBootDemo
* @Package: com.yxj.spring
* @Description:
* @Author: 阿杰
* @CreateDate: 2019/1/18 20:18
* @UpdateUser: 暂无
* @UpdateDate: 2019/1/18 20:18
* @UpdateRemark: The modified content
* @Version: 1.0
*/
@SpringBootApplication
public class SpringBootTestRun {
@Value("${localhost.test.userName}")
private String testUserName;
@Value("${localhost.test.passWord}")
private String testPassWord;
@Value("${localhost.test.default:testDefault}")
private String testDefault;
@Value("${test.remark}")
private String testRemark;
public static void main(String[] args) {
ConfigurableApplicationContext run = SpringApplication.run(SpringBootTestRun.class, args);
System.out.println("-------------分割线---------------");
SpringBootTestRun bean = run.getBean(SpringBootTestRun.class);
System.out.println(bean.testUserName);
System.out.println(bean.testPassWord);
System.out.println(bean.testRemark);
System.out.println(bean.testDefault);
}
}
package com.yxj.spring;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.core.env.ConfigurableEnvironment;
/**
* @ProjectName: springBootDemo
* @Package: com.yxj.spring
* @Description:
* @Author: 阿杰
* @CreateDate: 2019/1/18 20:18
* @UpdateUser: 暂无
* @UpdateDate: 2019/1/18 20:18
* @UpdateRemark: The modified content
* @Version: 1.0
*/
@SpringBootApplication
public class SpringBootTestRun {
public static void main(String[] args) {
ConfigurableApplicationContext run = SpringApplication.run(SpringBootTestRun.class, args);
System.out.println("-------------分割线---------------");
ConfigurableEnvironment environment = run.getEnvironment();
String userName = environment.getProperty("localhost.test.userName");
String passWord = environment.getProperty("localhost.test.passWord");
String testRemark = environment.getProperty("test.remark");
System.out.println(userName);
System.out.println(passWord);
System.out.println(testRemark);
}
}
-------------分割线---------------
test123
passWordTest
test userName is test123
假设上级目录名称为testConfig,里面有一个test.properties
package com.yxj.spring;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;
/**
* @ProjectName: springBootDemo
* @Package: com.yxj.spring
* @Description:
* @Author: 阿杰
* @CreateDate: 2019/1/18 20:18
* @UpdateUser: 暂无
* @UpdateDate: 2019/1/18 20:18
* @UpdateRemark: The modified content
* @Version: 1.0
*/
@SpringBootApplication
@PropertySource("classpath:app.properties")
@PropertySource("classpath:appTwo.properties")
public class SpringBootTestRun {
@Value("${localhost.test.userName}")
private String testUserName;
@Value("${app.test.value}")
private String appValue;
@Value("${appTwo.test.value}")
private String appTwoValue;
/**
* 也可以通过file这种方式来指定配置文件的位置
* @param args
*/
public static void main(String[] args) {
ConfigurableApplicationContext run = SpringApplication.run(SpringBootTestRun.class, args);
System.out.println("-------------分割线---------------");
SpringBootTestRun bean = run.getBean(SpringBootTestRun.class);
System.out.println(bean.testUserName);
System.out.println(bean.appValue);
System.out.println(bean.appTwoValue);
}
}
app.properties
app.test.value=app
appTwo.properties
appTwo.test.value=appTwo
测试结果
-------------分割线---------------
test123
app
appTwo