自己写spring boot starter

自己写spring boot starter

学习了：《spring boot实战》汪云飞著 6.5.4节

pom.xml

<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.stono</groupId>
  <artifactId>sboot161</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>sboot161</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-autoconfigure</artifactId>
      <version>1.5.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

HelloService.java

package com.stono;

public class HelloService {
    private String msg;

    public String sayHello(){
        return "Hello"+msg;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

HelloServiceProperties.java

package com.stono;

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "hello")
public class HelloServiceProperties {
    private static final String MSG = "world";
    private String msg = MSG;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

HelloServiceAutoConfiguration.java

package com.stono;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableConfigurationProperties(HelloServiceProperties.class)
@ConditionalOnClass(HelloService.class)
@ConditionalOnProperty(prefix = "hello", value = "enabled", matchIfMissing = true)
public class HelloServiceAutoConfiguration {
    @Autowired
    private HelloServiceProperties helloServiceProperties;

    @Bean
    @ConditionalOnMissingBean(HelloService.class)
    public HelloService helloService(){
        HelloService helloService = new HelloService();
        helloService.setMsg(helloServiceProperties.getMsg());
        return helloService;
    }
}

编译完毕之后，使用IntelliJ 自带的Edit Configurations... 进行maven 编译设置，参数为 clean package

运行配置好的maven命令即可编译jar包；

如果在terminal中直接运行mvn clean package

会出现错误：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project sboot161:
 Compilation failure: Compilation failure:
[ERROR] 不再支持源选项 1.5。请使用 1.6 或更高版本。
[ERROR] 不再支持目标选项 1.5。请使用 1.6 或更高版本。
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

学习了：http://blog.csdn.net/sosous/article/details/78312867

进行pom.xml文件修改：

  <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>

就可以正常运行 mvn clean package了；

运行之后，需要使用mvn install命令将jar包安装本地库：

mvn install:install-file -Dfile=D:\Java\IdeaProjects\sboot161\target\sboot161-1.0-SNAPSHOT.jar -DgroupId=com.stono -DartifactId=sboot161 -Dversion=1.0-SNAPSHOT -Dpackaging=jar

然后在其他项目中就可以添加该pom依赖，在程序中自动引入该HelloService了；