1. 前言
　　下載最新版的JavaEE eclipse-jee-oxygen-2-win32-x86_64.zip
　　安裝STS插件 Window->Eclipse Marketplace -> popular 下那個 Spring Tools(aka Spring IDE and Spring Tool Suite)

　　然後通過STS工具創建一個新的Spring boot工程，這裏就不細說了。網上資料很多，也比較簡單就可以搭建起來。後面對SpringBoot也只是簡單的提一下，還有說一下註意點。沒什麽好說的。我也是參考一些文檔和博客，自己玩玩而已。
　　大部分參考這系列博客，從頭到尾，調重點練習一遍： http://www.ityouknow.com/spring-boot.html

 1 @SpringBootApplication
 2 public class SpringApplicationDemo {
 3     @RequestMapping("/home")
 4     String home() {
 5         return "歡迎使用";
 6     }
 7     public static void
 
 main(String[] args) {
 8         System.out.println("start..");
 9         SpringApplication.run(SpringApplicationDemo.class, args);
10     }
11 }

　　pom.xml

 1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 2     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
 
>
 3     <modelVersion>4.0.0</modelVersion>
 4     <groupId>net.demo</groupId>
 5     <artifactId>demo</artifactId>
 6     <version>0.0.1-SNAPSHOT</version>
 7     <name>demo Maven Webapp</name>
 8     <url>http://maven.apache.org</url>
 9 
10     <parent>
11         <groupId>org.springframework.boot</groupId>
12         <artifactId>spring-boot-starter-parent</artifactId>
13         <version>1.5.9.RELEASE</version>
14     </parent>
15     <dependencies>
16         <dependency>
17             <groupId>org.springframework.boot</groupId>
18             <artifactId>spring-boot-starter-web</artifactId>
19         </dependency>
20         <dependency>
21             <groupId>org.springframework.boot</groupId>
22             <artifactId>spring-boot-devtools</artifactId>
23             <optional>true</optional>
24         </dependency>
25         <dependency>
26             <groupId>org.springframework.boot</groupId>
27             <artifactId>spring-boot-starter-test</artifactId>
28         </dependency>
29     </dependencies>
30     <build>
31         <plugins>
32             <plugin>
33                 <groupId>org.springframework.boot</groupId>
34                 <artifactId>spring-boot-maven-plugin</artifactId>
35                 <configuration>
36                     <fork>true</fork>
37                 </configuration>
38             </plugin>
39         </plugins>
40         <finalName>demo</finalName>
41     </build>
42     <packaging>war</packaging>
43 </project>

　　3. 配置在application.properties

　　(1) 自定義Property

1 net.demo.title=\u6D4B\u8BD5\u4F8B\u5B50
2 net.demo.description=demo\u6D4B\u8BD5

　　引用

1 @Component
2 public class DemoProperties {
3     @Value("${net.demo.title}")
4     private String title;
5     @Value("${net.demo.description}")
6     private String description;
7 Get/Set
8 }

　　註入使用

1 @Autowired
2 DemoProperties prop;

　　(2)log配置

1 logging.path=log
2 logging.level.com.favorites=DEBUG
3 logging.level.org.springframework.web=INFO

4. 連接Postgres數據庫

　　pom.xml增加

 1 <!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
 2 <dependency>
 3     <groupId>org.postgresql</groupId>
 4     <artifactId>postgresql</artifactId>
 5 </dependency>
 6 <dependency>
 7     <groupId>org.mybatis.spring.boot</groupId>
 8     <artifactId>mybatis-spring-boot-starter</artifactId>
 9     <version>1.1.1</version>
10 </dependency>

　　application.properties

 1 net.demo.title=\u6D4B\u8BD5\u4F8B\u5B50
 2 net.demo.description=demo\u6D4B\u8BD5
 3 
 4 logging.path=log
 5 logging.level.com.favorites=INFO
 6 logging.level.org.springframework.web=INFO
 7 
 8 spring.datasource.url=jdbc:postgresql://172.16.23.202:5432/test
 9 spring.datasource.username=postgres
10 spring.datasource.password=
11 spring.datasource.driverClassName=org.postgresql.Driver
12 
13 mybatis.typeAliasesPackage=net.xxx.demo.model
14 mybatis.mapperLocations=classpath:net/xxx/demo/mapper/*.xml

　　接下來就是跟以前SSM框架一樣了，

　　PersonMapper.xml
　　PersonModel.java
　　PersonDao.java
　　PersonService.java
　　PersonController.java
　　修改 mapper.xml Eclipse 可以安裝 MyBatipse 這個插件
5. thymeleaf 模版
　　這個只是拋磚引玉提一下而已，我估計不會用上。我後面準備考慮用阿裏的Ant.Design
6. Redis 連接
　　依賴 pom.xml

1 <dependency> 
2     <groupId>org.springframework.boot</groupId> 
3     <artifactId>spring-boot-starter-data-redis</artifactId> 
4 </dependency>

　　配置 application.properties

 1 # REDIS (RedisProperties)
 2 spring.redis.database=0
 3 spring.redis.host=172.16.20.229
 4 spring.redis.port=6379
 5 spring.redis.password=
 6 spring.redis.pool.max-active=8
 7 spring.redis.pool.max-wait=-1
 8 spring.redis.pool.max-idle=8
 9 spring.redis.pool.min-idle=0
10 spring.redis.timeout=0

　　RedisConfig.java

 1 @Configuration
 2 public class RedisConfig {
 3     
 4     @Bean
 5     Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer(ObjectMapper objectMapper) {
 6         Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(
 7                 Object.class);
 8         jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
 9         return jackson2JsonRedisSerializer;
10     }
11 
12     @Bean
13     RedisTemplate<String, Object> objRedisTemplate(JedisConnectionFactory connectionFactory,
14             Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer) {
15         RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();
16         redisTemplate.setConnectionFactory(connectionFactory);
17         redisTemplate.setDefaultSerializer(jackson2JsonRedisSerializer);
18         StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
19         redisTemplate.setKeySerializer(stringRedisSerializer);
20         redisTemplate.setHashKeySerializer(stringRedisSerializer);
21         return redisTemplate;
22     }
23 }

　　RedisTestService.java

 1 @Service
 2 public class RedisTestService {
 3     
 4     @Autowired
 5     private RedisTemplate<String, Object> redisTemplate;
 6     
 7     private static String REDIS_TEST_KEY = "redis-test";
 8     
 9     public Person save(Person person) {
10         this.redisTemplate.opsForHash().put(REDIS_TEST_KEY, person.getName(), person);
11         return person;
12     }
13     
14     public Object find(String uid) {
15         return this.redisTemplate.opsForHash().get(REDIS_TEST_KEY, uid);
16     }
17     
18     public Map<Object, Object> findAll(){
19         return this.redisTemplate.opsForHash().entries(REDIS_TEST_KEY);
20     }
21     
22     public Long delete(String uid) {
23         return this.redisTemplate.opsForHash().delete(REDIS_TEST_KEY, uid);
24     }
25 }

　　RedisTestController.java

 1 @RestController
 2 @RequestMapping("/api/redis")
 3 public class RedisTestController {
 4 
 5     @Autowired
 6     private RedisTestService redisTestService;
 7     
 8     @RequestMapping("/save")
 9     public Object save(@RequestParam("name") String name,
10             @RequestParam("password") String password,
11             @RequestParam("uid") Integer uid) {
12         Person person = new Person();
13         person.setName(name);
14         person.setPassword(password);
15         person.setUid(uid);
16         return redisTestService.save(person);
17     }
18     
19     @RequestMapping("/save1")
20     public Object save1(Person person) {
21         return redisTestService.save(person);
22     }
23     
24     @GetMapping("{uid}")
25     public Object find(@PathVariable String uid) {
26         System.out.println(uid);
27         return redisTestService.find(uid);
28     }
29     
30     @RequestMapping("/findall")
31     public Object findAll() {
32         return redisTestService.findAll();
33     }
34     
35     @GetMapping("/delete/{uid}")
36     public Long delete(@PathVariable String uid) {
37         return redisTestService.delete(uid);
38     }
39 }

7.Redis-Cache

 1 @Configuration
 2 @EnableCaching
 3 public class RedisCacheManager {
 4 
 5     @Bean
 6     public RedisCacheManager cacheManager() {
 7         RedisCacheManager redisCacheManager = new RedisCacheManager();
 8         return redisCacheManager;
 9     }
10 }

　　然後可以通過如下註解進行緩存

1 @Cacheable(value="find", key="#uid")

　　如果發現Key相同，那麽直接返回redis裏的value，不對方法進行調用，否則調用對於方法，並設置到redis中。

　　參考這個 http://www.ityouknow.com/springboot/2016/03/06/springboot(%E4%B8%89)-Spring-Boot%E4%B8%ADRedis%E7%9A%84%E4%BD%BF%E7%94%A8.html
　　還有一個分布式session自帶解決方案 Session-spring-session-data-redis
　　https://segmentfault.com/a/1190000004358410
8. redis-session
　　pom.xml

1 <dependency>
2 <groupId>org.springframework.session</groupId>
3 <artifactId>spring-session-data-redis</artifactId>
4 </dependency>

　　SessionConfig.java

1 @Configuration
2 @EnableRedisHttpSession(maxInactiveIntervalInSeconds=5)
3 public class SessionConfig {
4 
5 }

　　使用

1 @RequestMapping("/guid")
2 public String session(HttpSession session) {
3     UUID guid = (UUID)session.getAttribute("GUID");
4     if(guid == null) {
5         guid = UUID.randomUUID();
6     }
7     session.setAttribute("GUID", guid);
8     return session.getId();
9 }

9. 定時器的使用
　　在application啟動類加上以下這個註解 @EnableScheduling 然後如下使用

1 @Scheduled(cron="*/5 * * * * ?")
2 private void process() {
3     System.out.println("this is scheduler task running: " + (count ++) + " " + System.currentTimeMillis());
4 }

10.打包部署

　　根據pom.xml裏 <packaging>jar</packaging> 打成jar包或者war包
　　打成jar包
　　如果你使用的是maven來管理項目，執行以下命令既可以

1 cd 項目跟目錄（和pom.xml同級）
2 mvn clean package
3 ## 或者執行下面的命令
4 ## 排除測試代碼後進行打包
5 mvn clean package -Dmaven.test.skip=true

　　打包完成後jar包會生成到target目錄下，命名一般是 項目名+版本號.jar

　　啟動jar包命令

1 java -jar target/spring-boot-scheduler-1.0.0.jar

　　這種方式，只要控制臺關閉，服務就不能訪問了。下面我們使用在後臺運行的方式來啟動:

1 nohup java -jar target/spring-boot-scheduler-1.0.0.jar &

　　也可以在啟動的時候選擇讀取不同的配置文件

1 java -jar app.jar --spring.profiles.active=dev

　　也可以在啟動的時候設置jvm參數

1 java -Xms10m -Xmx80m -jar app.jar &

11.幾個常用插件

　　Vrapper 一個vim鍵盤映射插件
　　MyBatipse mybatis mapper插件
　　STS springboot插件
　　Decompiler 反編譯插件

物聯網架構成長之路(13)-SpringBoot入門