springBoot进阶02

SpringBoot进阶02

1. 日志的使用

1.1 基本使用

/**
 * 获取日志记录器
 */
Logger logger = LoggerFactory.getLogger(this.getClass());

@RequestMapping("/hello")
@ResponseBody
public String sayHello(){
    //日志级别 trace
    logger.trace("trace....");
    logger.debug("debug....");
    logger.info("info....");
    logger.warn("warn....");
    logger.error("error...");
    return "hello springBoot!";
}

基本使用

 

1.2 yml修改日志级别

在application.yml中(指定到修改的包)

#修改日志级别(默认是info) trace
logging:
  level:
   cn:
     dyier: trace

1.3 指定配置文件配置logback.xml

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

<configuration scan="false" scanPeriod="60 seconds" debug="false">
    
    <property name="LOG_HOME" value="E:/springbootLogs" />
    
    <property name="appName" value="dyier-springboot"/>
    
    <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
        
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{50} - %msg%npattern>
        layout>
    appender>

    
    <appender name="appLogAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        
        <file>${LOG_HOME}/${appName}.logfile>
        
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            
            <fileNamePattern>${LOG_HOME}/${appName}-%d{yyyy-MM-dd}-%i.logfileNamePattern>
            
            <MaxHistory>365MaxHistory>
            
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>100MBmaxFileSize>
            timeBasedFileNamingAndTriggeringPolicy>
        rollingPolicy>
        
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [ %thread ] - [ %-5level ] [ %logger{50} : %line ] - %msg%npattern>
        layout>
    appender>

    
    
    <logger name="cn.dyier" level="debug" />
    
    <logger name="org.springframework" level="debug" additivity="false"/>



    
    <root level="info">
        <appender-ref ref="stdout" />
        <appender-ref ref="appLogAppender" />
    root>
configuration>

logback.xml

 

1.4 指定配置文件配置logback-spring.xml

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

<configuration scan="false" scanPeriod="60 seconds" debug="false">
    
    <property name="LOG_HOME" value="E:/logback-spring" />
    
    <property name="appName" value="dyier-springboot"/>
    
    <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
        
        <layout class="ch.qos.logback.classic.PatternLayout">
            <springProfile name="dev">
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} ----> [%thread] ---> %-5level %logger{50} - %msg%npattern>
            springProfile>
            <springProfile name="!dev">
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} ==== [%thread] ==== %-5level %logger{50} - %msg%npattern>
            springProfile>
        layout>
    appender>

    
    <appender name="appLogAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        
        <file>${LOG_HOME}/${appName}.logfile>
        
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            
            <fileNamePattern>${LOG_HOME}/${appName}-%d{yyyy-MM-dd}-%i.logfileNamePattern>
            
            <MaxHistory>365MaxHistory>
            
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>100MBmaxFileSize>
            timeBasedFileNamingAndTriggeringPolicy>
        rollingPolicy>
        
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [ %thread ] - [ %-5level ] [ %logger{50} : %line ] - %msg%npattern>
        layout>
    appender>

    
    
    <logger name="cn.dyier" level="info" />
    
    <logger name="org.springframework" level="debug" additivity="false"/>



    
    <root level="info">
        <appender-ref ref="stdout" />
        <appender-ref ref="appLogAppender" />
    root>
configuration>

logback-spring.xml

 

1.5 logback.xml与logback-spring的区别

logback.xml：直接就被日志框架识别了

logback-spring.xml：日志框架就不直接加载日志的配置项，由SpringBoot解析日志配置，可以使用SpringBoot的高级Profile功能

 

 

 

 

1.6 配置文件指定日志写入磁盘的方式

方式一：

logging.file: E:/logback/logs

方式二：

logging.path: E:/logback/logs

1.7 切换日志框架为log4j2

pox.xml取消logback依赖，引入log4j2依赖

<dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
            <exclusions>

                <exclusion>
                    <groupId>org.springframework.bootgroupId>
                    <artifactId>spring-boot-starter-loggingartifactId>
                exclusion>
            exclusions>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-log4j2artifactId>
dependency>

依赖

 

1.8 编写log4j2-spring配置文件

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



<configuration status="WARN" monitorInterval="30">
    
    <appenders>
        
        <console name="Console" target="SYSTEM_OUT">
            
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
        console>
        
        <File name="log" fileName="log/test.log" append="false">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
        File>
        
        <RollingFile name="RollingFileInfo" fileName="${sys:user.home}/logs/info.log"
                     filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
            
            <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            Policies>
        RollingFile>
        <RollingFile name="RollingFileWarn" fileName="${sys:user.home}/logs/warn.log"
                     filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
            <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            Policies>
            
            <DefaultRolloverStrategy max="20"/>
        RollingFile>
        <RollingFile name="RollingFileError" fileName="${sys:user.home}/logs/error.log"
                     filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log">
            <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            Policies>
        RollingFile>
    appenders>
    
    <loggers>
        
        <logger name="org.springframework" level="INFO"/>
        <logger name="org.mybatis" level="INFO"/>
        <root level="all">
            <appender-ref ref="Console"/>
            <appender-ref ref="log"/>
            <appender-ref ref="RollingFileInfo"/>
            <appender-ref ref="RollingFileWarn"/>
            <appender-ref ref="RollingFileError"/>
        root>
    loggers>
configuration>

log4j2-spring

 

2. SpringBoot继承Thymeleaf

2.1 导入依赖

<dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-thymeleafartifactId>
dependency>

 

2.2 创建模板hello.html(文件位置:classpath:templates/hello.html)

<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
head>
<body>
    <h1>成功！h1>
    
 
    <div th:text="${msg}">这是显示欢迎信息div>
body>
html>

 

2.3 编写controller

@RequestMapping("/jsp")
public String jsp(Model model) {
    model.addAttribute("msg", "hello jsp");
    //会去找classpath:templates/hello.html
    return "hello";
}

 

2.4 Thymeleaf的自动配置原理

@EnableAutoConfiguration 开启自动配置功能，通过一个AutoConfigurationImportSelector导入选择器去扫描 spring-boot-autoconfigure-2.0.5.RELEASE.jar 自动配置包下面的 spring.factories 文件中的很多很多的自动配置的类

而：ThymeleafAutoConfiguration 是的Thymeleaf的自动配置 ，在这个自动配置类里面通过一个ThymeleafProperties去读取配置文件中的配置(也有默认配置) ，来自动配置Thymeleaf，比如Thymeleaf的视图解析器的自动配置如下：

 

@Bean

@ConditionalOnMissingBean(name = "thymeleafViewResolver")

public ThymeleafViewResolver thymeleafViewResolver() {

ThymeleafViewResolver resolver = new ThymeleafViewResolver();

...

return resolver;

}

3. 静态资源

3.1 静态资源目录

Classpath:/static(resources/static)

3.2 webjars

导入依赖

<dependency>
    <groupId>org.webjars.bowergroupId>
    <artifactId>jqueryartifactId>
    <version>3.3.1version>
dependency>

3.3 模板导入jquery的js

<script th:src="@{/webjars/jquery/3.3.1/dist/jquery.js}">script>

3.4 配置首页

classpath:/index.html(resources/index.html)

3.5 网站图标

classpath:/favicon.icon(resources/favicon.icon)

4. SpringBoot中的MVC配置

4.1 配置拦截器

定义拦截器

@Configuration
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("前置拦截");
        return false;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("后置拦截");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

 

4.2 注册拦截器和添加视图控制器

@Configuration
public class MyMvcConfig extends WebMvcConfigurerAdapter {
    @Autowired
    private LoginInterceptor loginInterceptor;

    /**
     * 批量注册拦截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(loginInterceptor).addPathPatterns("/**")
                .excludePathPatterns("/json02/obj");
    }

    /**
     * 批量注册ViewController
     * @param registry
     */
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/hello").setViewName("hello");
    }
}

 

5. 集成DataSource

5.1 导入依赖

        
            mysql
            mysql-connector-java
        

        
            org.springframework.boot
            spring-boot-starter-jdbc
        

 

5.2 配置文件自动配置datasource

spring:
  #配置spring DataSource
  datasource:
    url: jdbc:mysql:///test
    username: root
    password: 123456

6. 继承Mybatis

6.1 导入依赖

    org.mybatis.spring.boot
    mybatis-spring-boot-starter
    1.1.1
 
 

 

6.2 配置Mybatis包代理(application.yml)

#mybaits包代理
mybatis:
  type-aliases-package: cn.dyier.domain, cn.dyier.query

 

6.3 配置Mapper接口扫描包(@MapperScan)

@MapperScan
@SpringBootApplication
@MapperScan("cn.dyier.mapper")
public class App {
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

 

7. 集成事务

7.1 service上直接打标签

springBoot自动配置类事务。直接打标签即可

@Service
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    @Override
    @Transactional(propagation = Propagation.REQUIRED, readOnly = false)
    public void save(User user) {
        userMapper.save(user);
    }

    @Override
    public List findAll() {
        PageHelper.startPage(1, 3);
        return userMapper.findAll();
    }
}

 

8. PageHelper的使用(分页插件)

8.1 导入依赖

      <dependency>
          <groupId>com.github.pagehelpergroupId>
          <artifactId>pagehelperartifactId>
          <version>4.1.0version>
      dependency>

 

8.2 配置

@Configuration
public class MyBatisConfiguration {
 
@Bean
    public PageHelper pageHelper() {
System.out.println("MyBatisConfiguration.pageHelper()");
        PageHelper pageHelper = new PageHelper();
        Properties p = new Properties();
        p.setProperty("offsetAsPageNum", "true");
        p.setProperty("rowBoundsWithCount", "true");
        p.setProperty("reasonable", "true");
        pageHelper.setProperties(p);
        return pageHelper;
    }
}

 

 

 

 

8.3 使用

@Override
public List findAll() {
    PageHelper.startPage(1, 3);
    return userMapper.findAll();
}