一步一步學Spring Boot(一)
開心一笑
老闆說:“年輕人,如果你想在這裡做事,有一件事情你必須要學會,那就是我們這個公司裡要求非常乾淨,你進來時在鞋墊上擦腳了嗎?”
年輕人:“哦,擦了,先生。”
老闆:“另外一件事是我們要求員工非常誠實,我們門口沒有鞋墊”。
提出問題
Spring Boot如何整合其他技術???
視訊教程
大家好,我錄製的視訊已經在CSDN學院釋出了,有興趣的同學可以購買觀看。相信大家一定會收穫到很多知識的。謝謝大家的支援……
解決問題
前言
Spring Boot這個技術現在非常流行,網上也有很多的資料,但是都不是很齊全。所以我花了點時間整理了一下,供大家學習。但是有一點要注意的是,這個資料不是很齊全,以後會進行更新,喜歡大家多多支援和鼓勵。以後有時間我會錄製成視訊,供大家學習。
程式碼在github上面有,可以去下載:* [email protected]:huangwenyi10/my-work.git*
快速搭建Spring Boot專案
如何快速搭建 Spring Boot 專案,可以參考我之前寫的一篇部落格。
Spring Boot 整合mySQL
用JdbcTemplate
1) 新增依賴
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId >
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
2)新增配置檔案配置資料庫和其他引數
在resource資料夾下新增application.properties配置檔案並輸入資料庫引數,如下:
spring.datasource.url=jdbc:mysql://127.0 .0.1:3306/test
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5
server.port=8011
server.session.timeout=10
server.tomcat.uri-encoding=UTF-8
3)新建測試類連線資料庫
package com.example.demo;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.List;
import java.util.Map;
@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {
@Autowired
private JdbcTemplate jdbcTemplate;
@Test
public void contextLoads() {
List<Map<String,Object>> result = jdbcTemplate.queryForList("select * from ay_test");
System.out.println("query result is" + result.size());
System.out.println("success");
}
}
Spring Boot整合MyBatis
MyBatis的整合總共有3中方式,這裡講解最簡單的一種方式。
第1步:引入mybatis的starter的包。 Spring Boot將封裝的一系列支援boot的應用的工程都叫做starter,我們這裡引入mybatis對boot的支援的starter。如果是同一個的pom,要註釋掉mybatis的依賴,starter會自動引入依賴包。
pom.xml
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.1.1</version>
</dependency>12345
第2步:配置properties。
spring.datasource.driver-class-name=com.mysql.jdbc.Driver //1
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=test
spring.datasource.password=123456
spring.datasource.max-active=10
spring.datasource.max-idle=5
spring.datasource.min-idle=0
mybatis.mapper-locations=classpath:/mybatis/*Mapper.xml //2
mybatis.type-aliases-package=com.hjf.boot.demo.boot_mybatis.domain
第3步:生成介面AppMessageMapper檔案
package com.example.mybatis.test;
import org.apache.ibatis.annotations.Mapper;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.stereotype.Repository;
import java.util.List;
@Mapper
public interface AppMessageMapper {
int deleteByPrimaryKey(String id);
int insert(AppMessage record);
int insertSelective(AppMessage record);
AppMessage selectByPrimaryKey(String id);
int updateByPrimaryKeySelective(AppMessage record);
int updateByPrimaryKey(AppMessage record);
List<AppMessage> selectAll();
List<AppMessage> getMessById(String id);
}
第四步:生成實體類,服務層,服務層實現層,控制層
package com.example.mybatis.test;
import java.util.Date;
public class AppMessage {
private String id;
private String message;
private Date senddate;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id == null ? null : id.trim();
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message == null ? null : message.trim();
}
public Date getSenddate() {
return senddate;
}
public void setSenddate(Date senddate) {
this.senddate = senddate;
}
}
package com.example.mybatis.test;
import java.util.ArrayList;
import java.util.List;
public interface IAppMessageService {
public List<AppMessage> getMessage();
public List<AppMessage> getAllMessage();
public int addMessage(AppMessage appMessage);
public List<AppMessage> getMessageById(String id);
public int delMessage(String id);
}
package com.example.mybatis.test;
import java.util.ArrayList;
import java.util.List;
import com.example.mybatis.test.AppMessage;
import com.example.mybatis.test.AppMessageMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Component
public class AppMessageService implements IAppMessageService {
@Autowired
private AppMessageMapper appMessageMapper;
@Override
public List<AppMessage> getMessage(){
List<AppMessage> list = new ArrayList<>();
list.add(appMessageMapper.selectByPrimaryKey("xtt"));
//list = mapper.selectAll();
return list;
}
@Override
public List<AppMessage> getAllMessage(){
List<AppMessage> list = new ArrayList<>();
list = appMessageMapper.selectAll();
return list;
}
@Override
public int addMessage(AppMessage appMessage) {
return appMessageMapper.insert(appMessage);
}
@Override
public List<AppMessage> getMessageById(String id) {
return appMessageMapper.getMessById(id);
}
@Override
public int delMessage(String id) {
return appMessageMapper.deleteByPrimaryKey(id);
}
}
package com.example.mybatis.test;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/appmessage")
public class APPMessageController {
private AppMessageService appMessageService;
@RequestMapping("/getThree")
public List<AppMessage> getThreeForMessage(){
List<AppMessage> list = appMessageService.getMessage();
return list;
}
@RequestMapping("/getAll")
public List<AppMessage> getAllMessage(){
List<AppMessage> list = appMessageService.getAllMessage();
int num = list.size();
if(null!=list && num>3){
for (int i = 0; i < num-3; i++) {
list.remove(0);
}
}
return list;
}
@RequestMapping("/getByID")
public List<AppMessage> getMessageById(@RequestParam("id") String id){
List<AppMessage> list = appMessageService.getMessageById(id);
int num = list.size();
if(null!=list && num>5){
for (int i = 0; i < num-5; i++) {
list.remove(0);
}
}
return list;
}
@RequestMapping(value = "/add",method = RequestMethod.POST)
public int addMessage(@RequestBody AppMessage appMessage){
return appMessageService.addMessage(appMessage);
}
@RequestMapping(value="/delMessageById",method=RequestMethod.POST)
public int delMessageById(@RequestParam("id") String id){
return appMessageService.delMessage(id);
}
}
第五步:建立資料庫表(mysql資料庫)
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `appuser_message`
-- ----------------------------
DROP TABLE IF EXISTS `appuser_message`;
CREATE TABLE `appuser_message` (
`id` varchar(32) DEFAULT NULL,
`message` varchar(500) DEFAULT NULL,
`senddate` date DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
-- ----------------------------
-- Records of appuser_message
-- ----------------------------
INSERT INTO `appuser_message` VALUES ('1', '1', '2017-07-28');
檔案的目錄圖如下:
參考文章*
Spring Boot標籤總結
@SpringBootApplication
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class StartApp {
public static void main(String[] args) {
SpringApplication.run(StartApp.class,args);
}
}
說明:
1:用這個註解,就能實現自動掃描包和自動配置預設配置的功能,它包含了@ComponentScan和@EnableAutoConfiguration這兩個註解,同時這個類自身也是一個配置類@Configuration,可以直接在這個類裡新增@Bean來注入java bean,第一章用的註解組合實現的和這個註解功能是一致的,這也是Spring Boot官方推薦的配置方式。
@configuration
用@Configuration註解該類,等價於XML中配置beans;用@Bean標註方法等價於XML中配置bean。
程式碼如下:
package SpringStudy;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import SpringStudy.Model.Counter;
import SpringStudy.Model.Piano;
@Configuration
public class SpringConfig {
@Bean
public Piano piano(){
return new Piano();
}
@Bean(name = "counter")
public Counter counter(){
return new Counter(12,"Shake it Off",piano());
}
}
@ImportResource
類級別註解,當我們必須使用一個xml的配置時,使用@ImportResource和@Configuration來標識這個檔案資源的類。
編寫ConfigClass注入配置檔案application-bean.xml;
在com.kfit.config包下編寫類ConfigClass,這個確保能被Spring Boot可以掃描到,不然一切都付之東流了,具體程式碼如下:
com.kfit.config].ConfigClass:
package com.kfit.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
/**
* classpath路徑:locations={"classpath:application-bean1.xml","classpath:application-bean2.xml"}
* file路徑: locations = {"file:d:/test/application-bean1.xml"};
*/
@Configuration
@ImportResource(locations={"classpath:application-bean.xml"})
//@ImportResource(locations={"file:d:/test/application-bean1.xml"})
public class ConfigClass {
}
@RestController
@RequestMapping
@value
通過@value註解來讀取application.properties裡面的配置
face++ key
face_api_key = R9Z3Vxc7ZcxfewgVrjOyrvu1d-qR
face_api_secret =D9WUQGCYLvOCIdsbX35uTH****
@Value("${face_api_key}")
private String API_KEY;
@Value("${face_api_secret}")
private String API_SECRET;
注意使用這個註解的時候 使用@Value的類如果被其他類作為物件引用,必須要使用注入的方式,而不能new。這個很重要,我就是被這個坑了。
Spring Boot 整合Quartz
第一步:新增依賴
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>2.2.3</version>
</dependency>
第二步:定義配置檔案 quartz.xml,名字自己取就可以了
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">
<aop:config proxy-target-class="true"/>
<context:annotation-config/>
<!-- 利用import引入定時器的檔案 -->
<import resource="spring-quartz.xml"/>
</beans>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- 使用MethodInvokingJobDetailFactoryBean,任務類可以不實現Job介面,通過targetMethod指定呼叫方法-->
<bean id="taskJob" class="com.example.quartz.test.TestTask"/>
<bean id="jobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="group" value="job_work"/>
<property name="name" value="job_work_name"/>
<!--false表示等上一個任務執行完後再開啟新的任務-->
<property name="concurrent" value="false"/>
<property name="targetObject">
<ref bean="taskJob"/>
</property>
<property name="targetMethod">
<value>run</value>
</property>
</bean>
<!-- 排程觸發器 -->
<bean id="myTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="name" value="work_default_name"/>
<property name="group" value="work_default"/>
<property name="jobDetail">
<ref bean="jobDetail" />
</property>
<property name="cronExpression">
<value>0/10 * * * * ?</value>
</property>
</bean>
<!-- 排程工廠 -->
<bean id="scheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="myTrigger"/>
</list>
</property>
</bean>
</beans>
第三步:建立定時器需要的類 TestTask
package com.example.quartz.test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class TestTask {
/** 日誌物件 */
private static final Logger LOG = LoggerFactory.getLogger(TestTask.class);
public void run() {
if (LOG.isInfoEnabled()) {
LOG.info("測試任務執行緒開始執行");
}
System.out.println("quarty run .....");
}
}
第四步:讓spring boot掃描到配置檔案
主要是這個註解 @ImportResource(locations={“classpath:spring-mvc.xml”}),這樣spring boot就可以掃描到我們的配置檔案了
package com.example;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootApplication
@ImportResource(locations={"classpath:spring-mvc.xml"})
@EnableScheduling
public class DemoApplication{
@Autowired
private JmsTemplate jmsTemplate;
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
多個配置檔案的整合
例如,專案中有多個xml配置檔案:
- Spring-Common.xml位於common資料夾下
- Spring-Connection.xml位於connection資料夾下
Spring-ModuleA.xml位於moduleA資料夾下
你可以在程式碼中載入以上3個xml配置檔案
ApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"Spring-Common.xml","Spring-Connection.xml","Spring-ModuleA.xml"});
但是這種方法不易組織並且不好維護,最好的方法是在一個單獨的xml的配置檔案中組織其他所有的xml配置檔案。例如,可以建立一個Spring-All-Module.xml檔案,然後將其他的xml配置檔案匯入到Spring-All-Module.xml中,就像下邊這樣,
Spring-All-Module.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<import resource="common/Spring-Common.xml"/>
<import resource="connection/Spring-Connection.xml"/>
<import resource="moduleA/Spring-ModuleA.xml"/>
</beans>
現在,你可以在程式碼中載入一個單獨的xml配置檔案,如下:
ApplicationContext context = new ClassPathXmlApplicationContext(Spring-All-Module.xml);
Spring Boot整合Redis
第一步:新增依賴
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-redis -->
<!-- 注意包都要拿最新的版本 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-redis</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
第二步:配置properties
#redis
spring.redis.database=0
spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=
spring.redis.pool.max-active=8
spring.redis.pool.max-wait=-1
spring.redis.pool.max-idle=8
spring.redis.pool.min-idle=0
spring.redis.timeout=0
第三步:測試類
package com.example.redis.test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
/**
* @author Ay
* @date 2017/1/24.
*/
@RestController
@EnableAutoConfiguration
public class HelloRedisTestController {
@Resource
private RedisTemplate redisTemplate;
@Autowired
private StringRedisTemplate stringRedisTemplate;
@RequestMapping("/redis")
public String index(){
// 儲存字串
stringRedisTemplate.opsForValue().set("aaa", "111");
String string = stringRedisTemplate.opsForValue().get("aaa");
System.out.println(string);
return "Hello Ay...";
}
}
參考文章
Spring Boot 整合 ActiveMQ
安裝
【1】
第一步:新增依賴
<!-- ActiveMQ dependency start-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-client</artifactId>
</dependency>
<!-- ActiveMQ dependency end-->
第二步:定義配置檔案
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">
<aop:config proxy-target-class="true"/>
<context:annotation-config/>
<import resource="spring-quartz.xml"/>
<!-- 配置JMS連線工廠 -->
<bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<property name="brokerURL" value="failover:(tcp://localhost:61616)" />
</bean>
<!-- 定義訊息佇列(Queue) -->
<bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue">
<!-- 設定訊息佇列的名字 -->
<constructor-arg>
<value>myQueue</value>
</constructor-arg>
</bean>
<!-- 配置JMS模板(Queue),Spring提供的JMS工具類,它傳送、接收訊息。 -->
<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
<property name="connectionFactory" ref="connectionFactory" />
<property name="defaultDestination" ref="queueDestination" />
<property name="receiveTimeout" value="10000" />
</bean>
<!--queue訊息生產者 -->
<bean id="producerService" class="com.example.mq.test.ProducerServiceImpl">
<property name="jmsTemplate" ref="jmsTemplate"></property>
</bean>
<!--queue訊息消費者 -->
<bean id="consumerService" class="com.example.mq.test.ConsumerServiceImpl">
<property name="jmsTemplate" ref="jmsTemplate"></property>
</bean>
</beans>
第三步:定義消費者和生產者類
生產者類介面ProducerService
package com.example.mq.test;
import org.springframework.stereotype.Component;
import javax.jms.Destination;
public interface ProducerService {
/**
* 發訊息,向預設的 destination
* @param msg String 訊息內容
*/
public void sendMessage(String msg);
/**
* 發訊息,向指定的 destination
* @param destination 目的地
* @param msg String 訊息內容
*/
public void sendMessage(Destination destination, String msg);
/**
* 發訊息,向指定的 destination
* @param destination 目的地
* @param msg String 訊息內容
*/
/**
* 向指定的destination傳送訊息,消費者接受訊息後,把回覆的訊息寫到response佇列
* @param destination 目的地
* @param msg String 訊息內容
* @param response 回覆訊息的佇列
*/
public void sendMessage(Destination destination, String msg, Destination response);
}
生產者類實現
package com.example.mq.test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.stereotype.Component;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
public class ProducerServiceImpl implements ProducerService{
@Autowired
private JmsTemplate jmsTemplate;
public JmsTemplate getJmsTemplate() {
return jmsTemplate;
}