出自螞蟻課堂的簡單springboot-demo

springboot  微服務框架---分佈式css

  爲何要有SpringBoot?html

  簡化xml配置,提升開發效率。java

  配置或者是YML文件mysql

  SpringBoot 的做用web

  簡化xml(除外mybatis)spring

  獨立的應用程序(Jar/war(jsp))sql

  單獨war工程-不須要集成tomcat插件運行。(內嵌入一個tomcat)數據庫

1. 建立獨立的 Spring 應用程序apache

2. 嵌入的 Tomcat,無需部署 WAR 文件json

3. 簡化 Maven 配置

4. 自動配置 Spring

5. 提供生產就緒型功能,如指標,健康檢查和外部配置

6.開箱即用,沒有代碼生成,也無需 XML 配置。

springboot 提供了 http refult風格

@RestController ==Controller每一個方法加上    @ResponseBody

@ResponseBody 返回 全部請求方法返回json格式。

你們本身在搭建環境的時候  寫請求裏面可能會發生如下異常。。

什麼是模板引擎?

動態頁面靜態---

什麼是動態頁面靜態化?

---搜索引擎,SEO -(僞靜態)html

jsp 經過servlet

   分佈式事物解決方案

   操做多個數據源事物解決方案

   automatic+jta 兩段提交協議、 MQ推送。

--------------------------------------------------------------------------------------------------------

SpringBoot

  1. Spring介紹

1.一、SpringBoot簡介

在您第1次接觸和學習Spring框架的時候,是否由於其繁雜的配置而退卻了?在你第n次使用Spring框架的時候,是否以爲一堆反覆黏貼的配置有一些厭煩?那麼您就不妨來試試使用Spring Boot來讓你更易上手,更簡單快捷地構建Spring應用!

Spring Boot讓咱們的Spring應用變的更輕量化。好比:你能夠僅僅依靠一個Java類來運行一個Spring引用。你也能夠打包你的應用爲jar並經過使用java -jar來運行你的Spring Web應用。

Spring Boot的主要優勢:

爲全部Spring開發者更快的入門

開箱即用,提供各類默認配置來簡化項目配置

內嵌式容器簡化Web項目

沒有冗餘代碼生成和XML配置的要求

本章主要目標完成Spring Boot基礎項目的構建,而且實現一個簡單的Http請求處理,經過這個例子對Spring Boot有一個初步的瞭解,並體驗其結構簡單、開發快速的特性。

1.二、系統要求:

Java 7及以上

Spring Framework 4.1.5及以上

本文采用Java 1.8.0_7三、Spring Boot 1.3.2調試經過。

2、快速入門

2.一、建立一個Maven工程

名爲」springboot-helloworld」 類型爲Jar工程項目

2.二、pom文件引入依賴

 

<parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>1.3.3.RELEASE</version>

    </parent>

    <dependencies>

      <!—SpringBoot web 組件 -->

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

    </dependencies>

 

spring-boot-starter-parent做用

在pom.xml中引入spring-boot-start-parent,spring官方的解釋叫什麼stater poms,它能夠提供dependency management,也就是說依賴管理,引入之後在申明其它dependency的時候就不須要version了,後面能夠看到。

spring-boot-starter-web做用

springweb 核心組件

spring-boot-maven-plugin做用

 若是咱們要直接Main啓動spring,那麼如下plugin必需要添加,不然是沒法啓動的。若是使用maven 的spring-boot:run的話是不須要此配置的。(我在測試的時候,若是不配置下面的plugin也是直接在Main中運行的。)

 

 

2.三、編寫HelloWorld服務

建立package命名爲com.itmayiedu.controller(根據實際狀況修改)

建立HelloController類,內容以下

 

 

@RestController

@EnableAutoConfiguration

public class HelloController {

      @RequestMapping("/hello")

      public String index() {

           return "Hello World";

      }     

public static void main(String[] args) {

           SpringApplication.run(HelloController.class, args);

      }

}

 

2.四、@RestController

在上加上RestController 表示修飾該Controller全部的方法返回JSON格式,直接能夠編寫

Restful接口

2.五、@EnableAutoConfiguration

註解:做用在於讓 Spring Boot   根據應用所聲明的依賴來對 Spring 框架進行自動配置

        這個註解告訴Spring Boot根據添加的jar依賴猜想你想如何配置Spring。因爲spring-boot-starter-web添加了Tomcat和Spring MVC,因此auto-configuration將假定你正在開發一個web應用並相應地對Spring進行設置。

2.6 SpringApplication.run(HelloController.class, args);

   標識爲啓動類

2.七、SpringBoot啓動方式1

Springboot默認端口號爲8080

 

@RestController

@EnableAutoConfiguration

public class HelloController {

      @RequestMapping("/hello")

      public String index() {

           return "Hello World";

      }     

public static void main(String[] args) {

           SpringApplication.run(HelloController.class, args);

      }

}

 

啓動主程序,打開瀏覽器訪問http://localhost:8080/index,能夠看到頁面輸出Hello World

2.八、SpringBoot啓動方式2

@ComponentScan(basePackages = "com.itmayiedu.controller")---控制器掃包範圍

 

@ComponentScan(basePackages = "com.itmayiedu.controller")

@EnableAutoConfiguration

public class App {

      public static void main(String[] args) {

           SpringApplication.run(App.class, args);

      }

}

 

  1. Web開發

3.一、靜態資源訪問

在咱們開發Web應用的時候,須要引用大量的js、css、圖片等靜態資源。

默認配置

Spring Boot默認提供靜態資源目錄位置需置於classpath下,目錄名需符合以下規則:

/static

/public

/resources

/META-INF/resources

舉例:咱們能夠在src/main/resources/目錄下建立static,在該位置放置一個圖片文件。啓動程序後,嘗試訪問http://localhost:8080/D.jpg。如能顯示圖片,配置成功。

3.二、全局捕獲異常

@ExceptionHandler 表示攔截異常

  • @ControllerAdvice 是 controller 的一個輔助類,最經常使用的就是做爲全局異常處理的切面類
  • @ControllerAdvice 能夠指定掃描範圍
  • @ControllerAdvice 約定了幾種可行的返回值,若是是直接返回 model 類的話,須要使用 @ResponseBody 進行 json 轉換
    • 返回 String,表示跳到某個 view
    • 返回 modelAndView
    • 返回 model + @ResponseBody

 

@ControllerAdvice

public class GlobalExceptionHandler {

      @ExceptionHandler(RuntimeException.class)

      @ResponseBody

      public Map<String, Object> exceptionHandler() {

           Map<String, Object> map = new HashMap<String, Object>();

           map.put("errorCode", "101");

           map.put("errorMsg", "系統錯誤!");

           return map;

      }

}

 

3.三、渲染Web頁面

渲染Web頁面

在以前的示例中,咱們都是經過@RestController來處理請求,因此返回的內容爲json對象。那麼若是須要渲染html頁面的時候,要如何實現呢?

模板引擎

在動態HTML實現上Spring Boot依然能夠完美勝任,而且提供了多種模板引擎的默認配置支持,因此在推薦的模板引擎下,咱們能夠很快的上手開發動態網站。

Spring Boot提供了默認配置的模板引擎主要有如下幾種:

  • Thymeleaf
  • FreeMarker
  • Velocity
  • Groovy
  • Mustache

Spring Boot建議使用這些模板引擎,避免使用JSP,若必定要使用JSP將沒法實現Spring Boot的多種特性,具體可見後文:支持JSP的配置

當你使用上述模板引擎中的任何一個,它們默認的模板配置路徑爲:src/main/resources/templates。固然也能夠修改這個路徑,具體如何修改,可在後續各模板引擎的配置屬性中查詢並修改。

3.四、使用Freemarker模板引擎渲染web視圖

3.4.一、pom文件引入:

 

<!-- 引入freeMarker的依賴包. -->

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-freemarker</artifactId>

</dependency>

 

3.4.二、後臺代碼

在src/main/resources/建立一個templates文件夾,後綴爲*.ftl

 

      @RequestMapping("/index")

      public String index(Map<String, Object> map) {

          map.put("name","美麗的天使...");

           return "index";

      }

 

3.4.三、前臺代碼

 

<!DOCTYPE html>

<html>

<head lang="en">

<meta charset="UTF-8" />

<title></title>

</head>

<body>

        ${name}

</body>

</html>

 

3.4.四、Freemarker其餘用法

 

@RequestMapping("/index")

      public String index(Map<String, Object> map) {

          map.put("name","###螞蟻課堂###");

          map.put("sex",1);

          List<String> userlist=new ArrayList<String>();

          userlist.add("餘勝軍");

          userlist.add("張三");

          userlist.add("李四");

          map.put("userlist",userlist);

          return "index";

      }

<!DOCTYPE html>

<html>

<head lang="en">

<meta charset="UTF-8" />

<title>首頁</title>

</head>

<body>

        ${name}

        <#if sex==1>

            男

      <#elseif sex==2>

            女

     <#else>

        其餘     

       

        </#if>

       

       <#list userlist as user>

         ${user}

       </#list>

</body>

</html>

 

 

3.4.五、Freemarker配置

新建application.properties文件

 

########################################################

###FREEMARKER (FreeMarkerAutoConfiguration)

########################################################

spring.freemarker.allow-request-override=false

spring.freemarker.cache=true

spring.freemarker.check-template-location=true

spring.freemarker.charset=UTF-8

spring.freemarker.content-type=text/html

spring.freemarker.expose-request-attributes=false

spring.freemarker.expose-session-attributes=false

spring.freemarker.expose-spring-macro-helpers=false

#spring.freemarker.prefix=

#spring.freemarker.request-context-attribute=

#spring.freemarker.settings.*=

spring.freemarker.suffix=.ftl

spring.freemarker.template-loader-path=classpath:/templates/

#comma-separated list

#spring.freemarker.view-names= # whitelist of view names that can be resolved

 

3.五、使用JSP渲染Web視圖

3.5.一、pom文件引入如下依賴

 

<parent>

           <groupId>org.springframework.boot</groupId>

           <artifactId>spring-boot-starter-parent</artifactId>

           <version>1.3.3.RELEASE</version>

      </parent>

      <dependencies>

           <!-- SpringBoot 核心組件 -->

           <dependency>

                 <groupId>org.springframework.boot</groupId>

                 <artifactId>spring-boot-starter-web</artifactId>

           </dependency>

           <dependency>

                 <groupId>org.springframework.boot</groupId>

                 <artifactId>spring-boot-starter-tomcat</artifactId>

           </dependency>

           <dependency>

                 <groupId>org.apache.tomcat.embed</groupId>

                 <artifactId>tomcat-embed-jasper</artifactId>

           </dependency>

      </dependencies>

 

3.5.二、在application.properties建立如下配置

 

spring.mvc.view.prefix=/WEB-INF/jsp/

spring.mvc.view.suffix=.jsp

 

3.5.三、後臺代碼

 

@Controller

public class IndexController {

      @RequestMapping("/index")

      public String index() {

           return "index";

      }

}

 

  1. 數據訪問

4.一、springboot整合使用JdbcTemplate

4.1.1 pom文件引入

 

<parent>

           <groupId>org.springframework.boot</groupId>

           <artifactId>spring-boot-starter-parent</artifactId>

           <version>1.5.2.RELEASE</version>

      </parent>

      <dependencies>

           <dependency>

                 <groupId>org.springframework.boot</groupId>

                 <artifactId>spring-boot-starter-jdbc</artifactId>

           </dependency>

           <dependency>

                 <groupId>mysql</groupId>

                 <artifactId>mysql-connector-java</artifactId>

                 <version>5.1.21</version>

           </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>

 

4.1.2 application.properties新增配置

 

spring.datasource.url=jdbc:mysql://localhost:3306/test

spring.datasource.username=root

spring.datasource.password=root

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

 

 

4.1.3 UserService類

 

@Service

public class UserServiceImpl implements UserService {

      @Autowired

      private JdbcTemplate jdbcTemplate;

      public void createUser(String name, Integer age) {

           System.out.println("ssss");

           jdbcTemplate.update("insert into users values(null,?,?);", name, age);

      }

}

 

4.1.4 App類

 

@ComponentScan(basePackages = "com.itmayiedu")

@EnableAutoConfiguration

public class App {

    public static void main(String[] args) {

        SpringApplication.run(App.class, args);

    }

}

 

 

注意: spring-boot-starter-parent要在1.5以上

4.二、springboot整合使用mybatis

4.2.一、pom文件引入

 

  <parent>

           <groupId>org.springframework.boot</groupId>

           <artifactId>spring-boot-starter-parent</artifactId>

           <version>1.3.2.RELEASE</version>

           <relativePath /> <!-- lookup parent from repository -->

      </parent>

      <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>mysql</groupId>

                 <artifactId>mysql-connector-java</artifactId>

                 <version>5.1.21</version>

           </dependency>

           <dependency>

                 <groupId>org.springframework.boot</groupId>

                 <artifactId>spring-boot-starter-web</artifactId>

           </dependency>

      </dependencies>

 

4.2.二、配置文件引入

 

spring.datasource.url=jdbc:mysql://localhost:3306/test

spring.datasource.username=root

spring.datasource.password=root

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

 

 

4.2.三、Mapper代碼

 

public interface UserMapper {

      @Select("SELECT * FROM USERS WHERE NAME = #{name}")

      User findByName(@Param("name") String name);

      @Insert("INSERT INTO USERS(NAME, AGE) VALUES(#{name}, #{age})")

      int insert(@Param("name") String name, @Param("age") Integer age);

}

 

 

4.2.四、啓動方式

 

@ComponentScan(basePackages = "com.itmayiedu")

@MapperScan(basePackages = "com.itmayiedu.mapper")

@SpringBootApplication

public class App {

      public static void main(String[] args) {

           SpringApplication.run(App.class, args);

      }

}

 

4.三、springboot整合使用springjpa

4.3.1 pom文件引入依賴

 

<parent>

           <groupId>org.springframework.boot</groupId>

           <artifactId>spring-boot-starter-parent</artifactId>

           <version>1.4.2.RELEASE</version>

      </parent>

      <dependencies>

           <dependency>

                 <groupId>org.springframework.boot</groupId>

                 <artifactId>spring-boot-starter-data-jpa</artifactId>

           </dependency>

           <dependency>

                 <groupId>mysql</groupId>

                 <artifactId>mysql-connector-java</artifactId>

                 <version>5.1.21</version>

           </dependency>

           <dependency>

                 <groupId>org.springframework.boot</groupId>

                 <artifactId>spring-boot-starter-web</artifactId>

           </dependency>

      </dependencies>

 

4.3.2 建立User實體類

 

@Entity(name = "users")

public class User {

      @Id

      @GeneratedValue

      private Integer id;

      @Column

      private String name;

      @Column

      private Integer age;

      // ..get/set方法

}

 

4.3.3 建立UserDao

 

public interface UserDao extends JpaRepository<User, Integer> {

}

 

4.3.4 建立IndexController

 

@RestController

public class IndexController {

      @Autowired

      private UserDao userDao;

      @RequestMapping("/index")

      public String index(Integer id) {

           User findUser = userDao.findOne(id);

           System.out.println(findUser.getName());

           return "success";

      }

}

 

4.3.5 啓動項目

 

@ComponentScan(basePackages = { "com.itmayiedu" })

@EnableJpaRepositories(basePackages = "com.itmayiedu.dao")

@EnableAutoConfiguration

@EntityScan(basePackages = "com.itmayiedu.entity")

public class App {

      public static void main(String[] args) {

           SpringApplication.run(App.class, args);

      }

}

 

4.四、springboot整合多數據源

同窗們思考下,大家在項目中有使用到多數據源嗎?

4.4.1配置文件中新增兩個數據源

 

spring.datasource.test1.driverClassName = com.mysql.jdbc.Driver

spring.datasource.test1.url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8

spring.datasource.test1.username = root

spring.datasource.test1.password = root

spring.datasource.test2.driverClassName = com.mysql.jdbc.Driver

spring.datasource.test2.url = jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8

spring.datasource.test2.username = root

spring.datasource.test2.password = root

 

4.4.2配置文件中新增兩個數據源

 

@Configuration // 註冊到springboot容器中

@MapperScan(basePackages = "com.itmayiedu.user1", sqlSessionFactoryRef = "test1SqlSessionFactory")

public class DataSource1Config {

      /**

       *

       * @methodDesc: 功能描述:(配置test1數據庫)

       * @author: 餘勝軍

       * @param: @return

       * @createTime:2017年9月17日 下午3:16:44

       * @returnType:@return DataSource

       * @copyright:上海每特教育科技有限公司

       * @QQ:644064779

       */

      @Bean(name = "test1DataSource")

      @Primary

      @ConfigurationProperties(prefix = "spring.datasource.test1")

      public DataSource testDataSource() {

           return DataSourceBuilder.create().build();

      }

      /**

       *

       * @methodDesc: 功能描述:(test1 sql會話工廠)

       * @author: 餘勝軍

       * @param: @param

       *             dataSource

       * @param: @return

       * @param: @throws

       *             Exception

       * @createTime:2017年9月17日 下午3:17:08

       * @returnType:@param dataSource

       * @returnType:@return

       * @returnType:@throws Exception SqlSessionFactory

       * @copyright:上海每特教育科技有限公司

       * @QQ:644064779

       */

      @Bean(name = "test1SqlSessionFactory")

      @Primary

      public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource)

                 throws Exception {

           SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

           bean.setDataSource(dataSource);

//         bean.setMapperLocations(

//                    new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test1/*.xml"));

           return bean.getObject();

      }

      /**

       *

       * @methodDesc: 功能描述:(test1 事物管理)

       * @author: 餘勝軍

       * @param: @param

       *             dataSource

       * @param: @return

       * @param: @throws

       *             Exception

       * @createTime:2017年9月17日 下午3:17:08

       * @returnType:@param dataSource

       * @returnType:@return

       * @returnType:@throws Exception SqlSessionFactory

       * @copyright:上海每特教育科技有限公司

       * @QQ:644064779

       */

      @Bean(name = "test1TransactionManager")

      @Primary

      public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {

           return new DataSourceTransactionManager(dataSource);

      }

      @Bean(name = "test1SqlSessionTemplate")

      public SqlSessionTemplate testSqlSessionTemplate(

                 @Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {

           return new SqlSessionTemplate(sqlSessionFactory);

      }

}

 

4.4.2建立分包Mapper

 

public interface User1Mapper {

      @Insert("insert into users values(null,#{name},#{age});")

      public int addUser(@Param("name") String name, @Param("age") Integer age);

}

 

4.4.3啓動項目

 

@ComponentScan(basePackages = "com.itmayiedu")

@EnableAutoConfiguration

public class App {

      public static void main(String[] args) {

           SpringApplication.run(App.class, args);

      }

}

 

 

No qualifying bean of type [javax.sql.DataSource] is defined: expected single matching bean but found 2: test1DataSource,test2DataSource

  1. 事物管理

5.1.1springboot整合事物管理

 springboot默認集成事物,只主要在方法上加上@Transactional便可

5.1.2SpringBoot分佈式事物管理

使用springboot+jta+atomikos 分佈式事物管理

5.1.2.1新增配置文件信息

 

<dependency>

      <groupId>org.springframework.boot</groupId>

      <artifactId>spring-boot-starter-jta-atomikos</artifactId>

</dependency>

 

5.1.2.2新增配置文件信息

 

# Mysql 1

mysql.datasource.test.url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8

mysql.datasource.test.username = root

mysql.datasource.test.password = root

mysql.datasource.test.minPoolSize = 3

mysql.datasource.test.maxPoolSize = 25

mysql.datasource.test.maxLifetime = 20000

mysql.datasource.test.borrowConnectionTimeout = 30

mysql.datasource.test.loginTimeout = 30

mysql.datasource.test.maintenanceInterval = 60

mysql.datasource.test.maxIdleTime = 60

mysql.datasource.test.testQuery = select 1

# Mysql 2

mysql.datasource.test2.url =jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8

mysql.datasource.test2.username =root

mysql.datasource.test2.password =root

mysql.datasource.test2.minPoolSize = 3

mysql.datasource.test2.maxPoolSize = 25

mysql.datasource.test2.maxLifetime = 20000

mysql.datasource.test2.borrowConnectionTimeout = 30

mysql.datasource.test2.loginTimeout = 30

mysql.datasource.test2.maintenanceInterval = 60

mysql.datasource.test2.maxIdleTime = 60

mysql.datasource.test2.testQuery = select 1

 

 

5.1.2.3 讀取配置文件信息

 

package com.itmayiedu.config;

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

@ConfigurationProperties(prefix = "mysql.datasource.test")

public class DBConfig1 {

      private String url;

      private String username;

      private String password;

      private int minPoolSize;

      private int maxPoolSize;

      private int maxLifetime;

      private int borrowConnectionTimeout;

      private int loginTimeout;

      private int maintenanceInterval;

      private int maxIdleTime;

      private String testQuery;

}

package com.itmayiedu.config;

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

@ConfigurationProperties(prefix = "mysql.datasource.test1")

public class DBConfig2 {

      private String url;

      private String username;

      private String password;

      private int minPoolSize;

      private int maxPoolSize;

      private int maxLifetime;

      private int borrowConnectionTimeout;

      private int loginTimeout;

      private int maintenanceInterval;

      private int maxIdleTime;

      private String testQuery;

}

 

 

5.1.2.4 建立多數據源

 

@Configuration

// basePackages 最好分開配置 若是放在同一個文件夾可能會報錯

@MapperScan(basePackages = "com.itmayiedu.test01", sqlSessionTemplateRef = "testSqlSessionTemplate")

public class TestMyBatisConfig1 {

      // 配置數據源

      @Primary

      @Bean(name = "testDataSource")

      public DataSource testDataSource(DBConfig1 testConfig) throws SQLException {

           MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();

           mysqlXaDataSource.setUrl(testConfig.getUrl());

           mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

           mysqlXaDataSource.setPassword(testConfig.getPassword());

           mysqlXaDataSource.setUser(testConfig.getUsername());

           mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

           AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();

           xaDataSource.setXaDataSource(mysqlXaDataSource);

           xaDataSource.setUniqueResourceName("testDataSource");

           xaDataSource.setMinPoolSize(testConfig.getMinPoolSize());

           xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize());

           xaDataSource.setMaxLifetime(testConfig.getMaxLifetime());

           xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout());

           xaDataSource.setLoginTimeout(testConfig.getLoginTimeout());

           xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval());

           xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime());

           xaDataSource.setTestQuery(testConfig.getTestQuery());

           return xaDataSource;

      }

      @Bean(name = "testSqlSessionFactory")

      public SqlSessionFactory testSqlSessionFactory(@Qualifier("testDataSource") DataSource dataSource)

                 throws Exception {

           SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

           bean.setDataSource(dataSource);

           return bean.getObject();

      }

      @Bean(name = "testSqlSessionTemplate")

      public SqlSessionTemplate testSqlSessionTemplate(

                 @Qualifier("testSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {

           return new SqlSessionTemplate(sqlSessionFactory);

      }

}

package com.itmayiedu.datasource;

import java.sql.SQLException;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;

import org.mybatis.spring.SqlSessionFactoryBean;

import org.mybatis.spring.SqlSessionTemplate;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import com.atomikos.jdbc.AtomikosDataSourceBean;

import com.itmayiedu.config.DBConfig1;

import com.mysql.jdbc.jdbc2.optional.MysqlXADataSource;

@Configuration

// basePackages 最好分開配置 若是放在同一個文件夾可能會報錯

@MapperScan(basePackages = "com.itmayiedu.test02", sqlSessionTemplateRef = "test2SqlSessionTemplate")

public class TestMyBatisConfig2 {

      // 配置數據源

      @Bean(name = "test2DataSource")

      public DataSource testDataSource(DBConfig1 testConfig) throws SQLException {

           MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();

           mysqlXaDataSource.setUrl(testConfig.getUrl());

           mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

           mysqlXaDataSource.setPassword(testConfig.getPassword());

           mysqlXaDataSource.setUser(testConfig.getUsername());

           mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

           AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();

           xaDataSource.setXaDataSource(mysqlXaDataSource);

           xaDataSource.setUniqueResourceName("test2DataSource");

           xaDataSource.setMinPoolSize(testConfig.getMinPoolSize());

           xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize());

           xaDataSource.setMaxLifetime(testConfig.getMaxLifetime());

           xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout());

           xaDataSource.setLoginTimeout(testConfig.getLoginTimeout());

           xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval());

           xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime());

           xaDataSource.setTestQuery(testConfig.getTestQuery());

           return xaDataSource;

      }

      @Bean(name = "test2SqlSessionFactory")

      public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource)

                 throws Exception {

           SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

           bean.setDataSource(dataSource);

           return bean.getObject();

      }

      @Bean(name = "test2SqlSessionTemplate")

      public SqlSessionTemplate testSqlSessionTemplate(

                 @Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {

           return new SqlSessionTemplate(sqlSessionFactory);

      }

}

 

5.1.2.4 啓動加載配置

@EnableConfigurationProperties(value = { DBConfig1.class, DBConfig2.class })

  1. 日誌管理

6.1使用log4j記錄日誌

6.1.2新建log4j配置文件

 

#log4j.rootLogger=CONSOLE,info,error,DEBUG

log4j.rootLogger=info,error,CONSOLE,DEBUG

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender    

log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout    

log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n    

log4j.logger.info=info

log4j.appender.info=org.apache.log4j.DailyRollingFileAppender

log4j.appender.info.layout=org.apache.log4j.PatternLayout    

log4j.appender.info.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n 

log4j.appender.info.datePattern='.'yyyy-MM-dd

log4j.appender.info.Threshold = info  

log4j.appender.info.append=true  

#log4j.appender.info.File=/home/admin/pms-api-services/logs/info/api_services_info

log4j.appender.info.File=/Users/dddd/Documents/testspace/pms-api-services/logs/info/api_services_info

log4j.logger.error=error 

log4j.appender.error=org.apache.log4j.DailyRollingFileAppender

log4j.appender.error.layout=org.apache.log4j.PatternLayout    

log4j.appender.error.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n 

log4j.appender.error.datePattern='.'yyyy-MM-dd

log4j.appender.error.Threshold = error  

log4j.appender.error.append=true  

#log4j.appender.error.File=/home/admin/pms-api-services/logs/error/api_services_error

log4j.appender.error.File=/Users/dddd/Documents/testspace/pms-api-services/logs/error/api_services_error

log4j.logger.DEBUG=DEBUG

log4j.appender.DEBUG=org.apache.log4j.DailyRollingFileAppender

log4j.appender.DEBUG.layout=org.apache.log4j.PatternLayout    

log4j.appender.DEBUG.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n 

log4j.appender.DEBUG.datePattern='.'yyyy-MM-dd

log4j.appender.DEBUG.Threshold = DEBUG  

log4j.appender.DEBUG.append=true  

#log4j.appender.DEBUG.File=/home/admin/pms-api-services/logs/debug/api_services_debug

log4j.appender.DEBUG.File=/Users/dddd/Documents/testspace/pms-api-services/logs/debug/api_services_debug

 

 

6.2使用AOP統一處理Web請求日誌

6.2.1POM文件新增依賴

 

    <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-aop</artifactId>

    </dependency>

 

6.2.2POM文件新增依賴

 

@Aspect

@Component

public class WebLogAspect {

      private Logger logger = LoggerFactory.getLogger(getClass());

      @Pointcut("execution(public * com.itmayiedu.controller..*.*(..))")

      public void webLog() {

      }

      @Before("webLog()")

      public void doBefore(JoinPoint joinPoint) throws Throwable {

           // 接收到請求,記錄請求內容

           ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();

           HttpServletRequest request = attributes.getRequest();

           // 記錄下請求內容

           logger.info("URL : " + request.getRequestURL().toString());

           logger.info("HTTP_METHOD : " + request.getMethod());

           logger.info("IP : " + request.getRemoteAddr());

           Enumeration<String> enu = request.getParameterNames();

           while (enu.hasMoreElements()) {

                 String name = (String) enu.nextElement();

                 logger.info("name:{},value:{}", name, request.getParameter(name));

           }

      }

      @AfterReturning(returning = "ret", pointcut = "webLog()")

      public void doAfterReturning(Object ret) throws Throwable {

           // 處理完請求,返回內容

           logger.info("RESPONSE : " + ret);

      }

}

 

  1. 緩存支持

7.1註解配置與EhCache使用

7.1.1 pom文件引入

 

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-cache</artifactId>

</dependency>

 

7.1.2新建ehcache.xml 文件

 

<?xml version="1.0" encoding="UTF-8"?>

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";

    xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd";

    updateCheck="false">

    <diskStore path="java.io.tmpdir/Tmp_EhCache" />

    <!-- 默認配置 -->

    <defaultCache maxElementsInMemory="5000" eternal="false"

        timeToIdleSeconds="120" timeToLiveSeconds="120"

        memoryStoreEvictionPolicy="LRU" overflowToDisk="false" />

    <cache name="baseCache" maxElementsInMemory="10000"

        maxElementsOnDisk="100000" />

</ehcache>

 

配置信息介紹

  1.     <!--  
  2.        name:緩存名稱。  
  3.        maxElementsInMemory:緩存最大個數。  
  4.        eternal:對象是否永久有效,一但設置了,timeout將不起做用。  
  5.        timeToIdleSeconds:設置對象在失效前的容許閒置時間(單位:秒)。僅當eternal=false對象不是永久有效時使用,可選屬性,默認值是0,也就是可閒置時間無窮大。  
  6.        timeToLiveSeconds:設置對象在失效前容許存活時間(單位:秒)。最大時間介於建立時間和失效時間之間。僅當eternal=false對象不是永久有效時使用,默認是0.,也就是對象存活時間無窮大。  
  7.        overflowToDisk:當內存中對象數量達到maxElementsInMemory時,Ehcache將會對象寫到磁盤中。  
  8.        diskSpoolBufferSizeMB:這個參數設置DiskStore(磁盤緩存)的緩存區大小。默認是30MB。每一個Cache都應該有本身的一個緩衝區。  
  9.        maxElementsOnDisk:硬盤最大緩存個數。  
  10.        diskPersistent:是否緩存虛擬機重啓期數據 Whether the disk store persists between restarts of the Virtual Machine. The default value is false.  
  11.        diskExpiryThreadIntervalSeconds:磁盤失效線程運行時間間隔,默認是120秒。  
  12.        memoryStoreEvictionPolicy:當達到maxElementsInMemory限制時,Ehcache將會根據指定的策略去清理內存。默認策略是LRU(最近最少使用)。你能夠設置爲FIFO(先進先出)或是LFU(較少使用)。  
  13.        clearOnFlush:內存數量最大時是否清除。  
  14.     --> 

7.1.3代碼使用Cacheable

 

@CacheConfig(cacheNames = "baseCache")

public interface UserMapper {

      @Select("select * from users where name=#{name}")

      @Cacheable

      UserEntity findName(@Param("name") String name);

}

 

7.1.4清除緩存

 

@Autowired

private CacheManager cacheManager;

@RequestMapping("/remoKey")

public void remoKey() {

      cacheManager.getCache("baseCache").clear();

}

 

 

使用Redis作集中式緩存

  1. 其餘內容

8.一、使用@Scheduled建立定時任務

在Spring Boot的主類中加入@EnableScheduling註解,啓用定時任務的配置

@Component

public class ScheduledTasks {

    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");

    @Scheduled(fixedRate = 5000)

    public void reportCurrentTime() {

        System.out.println("如今時間:" + dateFormat.format(new Date()));

    }

}

8.二、使用@Async實現異步調用

啓動加上@EnableAsync ,須要執行異步方法上加入   @Async

8.三、自定義參數

配置文件值

 

name=itmayiedu.com

 

配置文件值

 

      @Value("${name}")

      private String name;

@ResponseBody

      @RequestMapping("/getValue")

      public String getValue() {

           return name;

      }

 

8.四、多環境配置

 

spring.profiles.active=pre

 

 

application-dev.properties:開發環境

application-test.properties:測試環境

application-prod.properties:生產環境

 

8.五、修改端口號

server.port=8888

server.context-path=/itmayiedu

8.六、SpringBoot yml 使用

建立application.yml

 

server:

  port:  8090

  context-path: /itmayiedu

 

8.七、發佈打包

使用mvn package 打包

使用java –jar 包名

若是報錯沒有主清單,在pom文件中新增

 

  <build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>1.8</source>

                    <target>1.8</target>

                </configuration>

            </plugin>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

                <configuration>

                    <maimClass>com.itmayiedu.app.App</maimClass>

                </configuration>

                <executions>

                    <execution>

                        <goals>

                            <goal>repackage</goal>

                        </goals>

                    </execution>

                </executions>

            </plugin>

        </plugins>

    </build>

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