配置文件详解：自定义属性、随机数、多环境配置等

Chapter2-1-1/pom.xml

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+<?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.didispace</groupId>
+	<artifactId>Chapter2-1-1</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<name>Chapter2-1-1</name>
+	<description></description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.3.2.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

Chapter2-1-1/src/main/java/com/didispace/Application.java

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+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+
+		SpringApplication.run(Application.class, args);
+
+	}
+
+}

Chapter2-1-1/src/main/java/com/didispace/service/BlogProperties.java

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+package com.didispace.service;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/5/5 下午12:16.
+ * @blog http://blog.didispace.com
+ */
+@Component
+public class BlogProperties {
+
+    @Value("${com.didispace.blog.name}")
+    private String name;
+    @Value("${com.didispace.blog.title}")
+    private String title;
+    @Value("${com.didispace.blog.desc}")
+    private String desc;
+
+    @Value("${com.didispace.blog.value}")
+    private String value;
+    @Value("${com.didispace.blog.number}")
+    private Integer number;
+    @Value("${com.didispace.blog.bignumber}")
+    private Long bignumber;
+    @Value("${com.didispace.blog.test1}")
+    private Integer test1;
+    @Value("${com.didispace.blog.test2}")
+    private Integer test2;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getDesc() {
+        return desc;
+    }
+
+    public void setDesc(String desc) {
+        this.desc = desc;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+
+    public Integer getNumber() {
+        return number;
+    }
+
+    public void setNumber(Integer number) {
+        this.number = number;
+    }
+
+    public Long getBignumber() {
+        return bignumber;
+    }
+
+    public void setBignumber(Long bignumber) {
+        this.bignumber = bignumber;
+    }
+
+    public Integer getTest1() {
+        return test1;
+    }
+
+    public void setTest1(Integer test1) {
+        this.test1 = test1;
+    }
+
+    public Integer getTest2() {
+        return test2;
+    }
+
+    public void setTest2(Integer test2) {
+        this.test2 = test2;
+    }
+}

Chapter2-1-1/src/main/java/com/didispace/web/HelloController.java

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+package com.didispace.web;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@RestController
+public class HelloController {
+
+    @RequestMapping("/hello")
+    public String index() {
+        return "Hello World";
+    }
+
+}

Chapter2-1-1/src/main/resources/application-dev.properties

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+# 服务端口
+server.port=1111

Chapter2-1-1/src/main/resources/application-prod.properties

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+# 服务端口
+server.port=3333

Chapter2-1-1/src/main/resources/application-test.properties

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+# 服务端口
+server.port=2222

Chapter2-1-1/src/main/resources/application.properties

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+com.didispace.blog.name=程序猿DD
+com.didispace.blog.title=Spring Boot教程
+com.didispace.blog.desc=${com.didispace.blog.name}正在努力写《${com.didispace.blog.title}》
+
+# 随机字符串
+com.didispace.blog.value=${random.value}
+# 随机int
+com.didispace.blog.number=${random.int}
+# 随机long
+com.didispace.blog.bignumber=${random.long}
+# 10以内的随机数
+com.didispace.blog.test1=${random.int(10)}
+# 10-20的随机数
+com.didispace.blog.test2=${random.int[10,20]}
+
+# 多环境配置文件激活属性
+spring.profiles.active=dev

Chapter2-1-1/src/test/java/com/didispace/ApplicationTests.java

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+package com.didispace;
+
+import com.didispace.service.BlogProperties;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.mock.web.MockServletContext;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(Application.class)
+public class ApplicationTests {
+
+	private static final Log log = LogFactory.getLog(ApplicationTests.class);
+
+	@Autowired
+	private BlogProperties blogProperties;
+
+
+	@Test
+	public void getHello() throws Exception {
+		Assert.assertEquals(blogProperties.getName(), "程序猿DD");
+		Assert.assertEquals(blogProperties.getTitle(), "Spring Boot教程");
+		Assert.assertEquals(blogProperties.getDesc(), "程序猿DD正在努力写《Spring Boot教程》");
+
+		log.info("随机数测试输出：");
+		log.info("随机字符串 : " + blogProperties.getValue());
+		log.info("随机int : " + blogProperties.getNumber());
+		log.info("随机long : " + blogProperties.getBignumber());
+		log.info("随机10以下 : " + blogProperties.getTest1());
+		log.info("随机10-20 : " + blogProperties.getTest2());
+
+	}
+
+}