技術標籤：Spring系列spring boot

SpringBoot 整合別的框架或者元件（Springmvc，mybatis，redis，rabbitmq等）都很簡單方便，因為只有兩步：

1. 引入依賴
2. 在配置檔案 application.properties(yml) 配置核心引數

1.整合 Springmvc

<dependencies>  
    <dependency>  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter-web</
 
artifactId> 
    </dependency> 
</dependencies> 

Springmvc 其實沒什麼配置，像ViewResolver，View等Bean已經自動裝配好了。

2.整合 Mybatis

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.2.0</version
 
>
</dependency>

<!-- starter只是引入了Mybatis及整合Spring的相關依賴，還需自行引入相應資料庫驅動-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.38</version>
</dependency>

spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/demo?serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=123456
# mapper檔案
mybatis.mapperLocations=classpath:mapping/*.xml
 

注：若沒有指定資料來源，需要在啟動類上加@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})讓資料來源不要自動裝配

3.整合 Redis

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

# Redis資料庫索引（預設為0）
spring.redis.database=0
# Redis伺服器地址
spring.redis.host=127.0.0.1
# Redis伺服器連線埠
spring.redis.port=6379
# Redis伺服器連線密碼（預設為空）
spring.redis.password=
# 連線超時時間（毫秒）
spring.redis.timeout=5000

測試

@SpringBootTest(classes = {App.class})
@RunWith(SpringRunner.class)
public class SpringRedisTest {

    @Resource
    private RedisTemplate<String,String> redisTemplate;

    @Test
    public void testRedis() throws Exception {
        ValueOperations<String, String> ops = redisTemplate.opsForValue();
        ops.set("name", "enjoy");
        String value = ops.get("name");
        System.out.println(value);
  }
}

4.整合日誌（logback）

使用其餘日誌元件，如logback，slf4j等直接在resource下放置相應名的配置檔案（logback.xml) 即可

注：SpringBoot已經預設集成了logback

下面是 logback.xml 的一個配置示例：

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

    <property name="PROJECT" value="mysb1" />
    <!--定義日誌檔案的儲存地址 勿在 LogBack 的配置中使用相對路徑-->
    <property name="ROOT" value="d:/logs/${PROJECT}/" />
    <!--日誌檔案最大的大小-->
    <property name="FILESIZE" value="50MB" />
    <!--日誌檔案保留天數-->
    <property name="MAXHISTORY" value="100" />
    <timestamp key="DATETIME" datePattern="yyyy-MM-dd HH:mm:ss" />
    <!-- 控制檯列印 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder charset="utf-8">
            <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
            </pattern>
        </encoder>
    </appender>
    
    <!-- ERROR 輸入到檔案，按日期和檔案大小 -->
    <!-- RollingFileAppender 按照每天生成日誌檔案 -->
    <appender name="ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder charset="utf-8">
            <!--格式化輸出：%d表示日期，%thread表示執行緒名，%-5level：級別從左顯示5個字元寬度%msg：日誌訊息，%n是換行符-->
            <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
            </pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--日誌檔案輸出的檔名-->
            <fileNamePattern>${ROOT}%d/error.%i.log</fileNamePattern>
            <!--日誌檔案保留天數-->
            <maxHistory>${MAXHISTORY}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <!--日誌檔案最大的大小-->
                <maxFileSize>${FILESIZE}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>
    
    <!-- WARN 輸入到檔案，按日期和檔案大小 -->
    <appender name="WARN" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder charset="utf-8">
            <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
            </pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>WARN</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${ROOT}%d/warn.%i.log</fileNamePattern>
            <maxHistory>${MAXHISTORY}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${FILESIZE}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>
    
    <!-- INFO 輸入到檔案，按日期和檔案大小 -->
    <appender name="INFO" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder charset="utf-8">
            <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
            </pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${ROOT}%d/info.%i.log</fileNamePattern>
            <maxHistory>${MAXHISTORY}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${FILESIZE}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>
    
    <!-- DEBUG 輸入到檔案，按日期和檔案大小 -->
    <appender name="DEBUG" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder charset="utf-8">
            <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
            </pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${ROOT}%d/debug.%i.log</fileNamePattern>
            <maxHistory>${MAXHISTORY}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${FILESIZE}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>
    
    <!-- TRACE 輸入到檔案，按日期和檔案大小 -->
    <appender name="TRACE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder charset="utf-8">
            <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
            </pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>TRACE</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy
            class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${ROOT}%d/trace.%i.log</fileNamePattern>
            <maxHistory>${MAXHISTORY}</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${FILESIZE}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
    </appender>
    
    <!-- SQL相關日誌輸出-->
    <logger name="org.apache.ibatis" level="INFO" additivity="false" />
    <logger name="org.mybatis.spring" level="INFO" additivity="false" />
    <logger name="com.github.miemiedev.mybatis.paginator" level="INFO" additivity="false" />
    
    <!-- Logger 根目錄 -->
    <!-- 此處設定日誌輸出級別 -->
    <root level="DEBUG">
        <appender-ref ref="STDOUT" />
        <appender-ref ref="DEBUG" />  
        <appender-ref ref="ERROR" />
        <appender-ref ref="WARN" />
        <appender-ref ref="INFO" />
        <appender-ref ref="TRACE" />
    </root>
</configuration>

5.整合 Jsp

一般來說springboot不建議直接使用jsp頁面，但不排除有些公司的專案依然使用jsp做前端介面。

springboot內建的tomcat並沒有整合對jsp的支援，也沒有對EL表示式的支援，因此要使用jsp應該先把相關的依賴整合進來，在pom檔案裡面新增

<!--JavaServer Pages Standard Tag Library，JSP標準標籤庫-->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
</dependency>

<!--內建tocat對Jsp支援的依賴，用於編譯Jsp-->
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
</dependency>

# 字首，jsp檔案位置
spring.mvc.view.prefix=/WEB-INF/jsp/
# 字尾，型別
spring.mvc.view.suffix=.jsp

測試：

@Controller
@RequestMapping("/jsp")
public class JspController {
    @RequestMapping("/hi")
    public String sayHello() {
        // 這裡直接返回index，他就會補全為 /WEB-INF/jsp/index.jsp ，然後返回
        return "index";
    }
}

在瀏覽器上輸入：localhost:8080/jsp/hi，可以看到JSP頁面

6.整合模板引擎（thymeleaf）

SpringBoot 推薦使用模板引擎來渲染 html，如果你不是歷史遺留專案，一定不要使用JSP，常用的模板引擎很多，有freemark,thymeleaf 等，其實都大同小異其中 springboot 強烈推薦的是用 thymeleaf。

1.pom檔案種新增thymeleaf的支援，並且刪除JSP的支援

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

2.新建html（resource/template），編寫Controller

<!DOCTYPE html>
<html xmlns:th="http://www.w3.org/1999/xhtml">
<head lang="en">
    <meta charset="UTF-8" />
    <title>enjoy</title>
</head>
<body>
<h1 th:text="${name}"/>
</body>
</html>

@Controller
@RequestMapping("/tpl")
public class ThymeleafController {
    @RequestMapping("/testThymeleaf")
    public String testThymeleaf(ModelMap map) {
     // 設定屬性
     map.addAttribute("name", "enjoy");
     // testThymeleaf：為模板檔案的名稱
     // 對應src/main/resources/templates/testThymeleaf.html
     return "testThymeleaf";
     }
}