interface Shape {
    public void draw();
}

class Circle implements Shape{
    @Override
    public void draw() {
        System.out.println("繪制一個(gè)圓形");
    }
}
 
class Square implements Shape{
 
    @Override
    public void draw() {
        System.out.println("繪制一個(gè)正方形");
    }
}

class ShapeFacade{
    private Circle circle;
    private Square square;
    public ShapeFacade(){
        circle = new Circle();
        square = new Square();
    }
    public void drawCircle(){
        circle.draw();
    }
    public void drawSquare(){
        square.hashCode();
    }
    public void drawCircleAndSquare(){
        circle.draw();
        square.draw();
    }
}

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>2.0.7</version>
        </dependency>

//根日志記錄器，參數(shù)1為需要輸出的日志等級(jí)，參數(shù)2為日志輸出的目標(biāo)地名稱(chēng)stuout
log4j.rootLogger=DEBUG,stdout,logFile 
//設(shè)置stdout是控制臺(tái)輸出
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
//配置日志輸出的格式
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
 
log4j.appender.logFile=org.apache.log4j.FileAppender
log4j.appender.logFile.ImmediateFlush=true
log4j.appender.logFile.Append=true
log4j.appender.logFile.File=D:/logs/log.log4j
log4j.appender.logFile.layout=org.apache.log4j.PatternLayout
log4j.appender.logFile.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

package com.xu.action;
 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
@RequestMapping("/tests")
public class TestController {
    private static final Logger logger = LoggerFactory.getLogger(TestController.class);
 
    @RequestMapping("/logs")
    public String log(){
        logger.debug("=====測(cè)試日志debug級(jí)別打印======");
        logger.info("=====測(cè)試日志info級(jí)別打印======");
        logger.error("=====測(cè)試日志error級(jí)別打印======");
        logger.warn("=====測(cè)試日志warn級(jí)別打印======");
        System.out.println("logs...");
        String str1 = "blog.xu.com";
        String str2 = "blog.csdn.net/xxxx";
        logger.info("=====徐苗苗的個(gè)人博客：{}; 徐苗苗的CSDN博客：{}",str1,str2);
        return "success";
    }
    
}

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Test {
private static final Logger logger = LoggerFactory.getLogger(Test.class);
// ……
}

<span style="color:#050e17"><span style="background-color:#f1f2f2"><span style="background-color:#2b2b2b"><span style="color:#f8f8f2"><code><span style="color:#abe338">logging:</span>
<span style="color:#abe338">  level:</span>
<span style="color:#abe338">    root:</span> INFO
</code></span></span></span></span>

<span style="color:#050e17"><span style="background-color:#f1f2f2"><span style="background-color:#2b2b2b"><span style="color:#f8f8f2"><code><span style="color:#abe338">logging:</span>
<span style="color:#abe338">  level:</span>
<span style="color:#abe338">    root:</span> INFO
<span style="color:#abe338">  file:</span>
<span style="color:#abe338">    name:</span> myapp.log
</code></span></span></span></span>

<span style="color:#050e17"><span style="background-color:#f1f2f2"><span style="background-color:#2b2b2b"><span style="color:#f8f8f2"><code><span style="color:#ffa07a"><</span><span style="color:#ffa07a">encoder</span><span style="color:#ffa07a">></span>
  <span style="color:#ffa07a"><</span><span style="color:#ffa07a">pattern</span><span style="color:#ffa07a">></span>%d<span style="color:#ffa07a">{yyyy-MM-dd HH:mm:ss.SSS}</span> [%thread] %-5level %logger<span style="color:#ffa07a">{36}</span> - %msg%n<span style="color:#ffa07a"></</span><span style="color:#ffa07a">pattern</span><span style="color:#ffa07a">></span>
<span style="color:#ffa07a"></</span><span style="color:#ffa07a">encoder</span><span style="color:#ffa07a">></span></code></span></span></span></span>

<span style="color:#050e17"><span style="background-color:#f1f2f2"><span style="background-color:#2b2b2b"><span style="color:#f8f8f2"><code><appender name=<span style="color:#abe338">"FILE"</span> <span style="color:#dcc6e0">class</span>="<span style="color:#abe338">ch</span>.<span style="color:#abe338">qos</span>.<span style="color:#abe338">logback</span>.<span style="color:#abe338">core</span>.<span style="color:#abe338">rolling</span>.<span style="color:#abe338">RollingFileAppender</span>">
  <<span style="color:#abe338">file</span>>/<span style="color:#abe338">path</span>/<span style="color:#abe338">to</span>/<span style="color:#abe338">logs</span>/<span style="color:#abe338">myapp</span>.<span style="color:#abe338">log</span></<span style="color:#abe338">file</span>>
  <<span style="color:#abe338">rollingPolicy</span> <span style="color:#abe338">class</span>="<span style="color:#abe338">ch</span>.<span style="color:#abe338">qos</span>.<span style="color:#abe338">logback</span>.<span style="color:#abe338">core</span>.<span style="color:#abe338">rolling</span>.<span style="color:#abe338">TimeBasedRollingPolicy</span>">
    <<span style="color:#abe338">fileNamePattern</span>>/<span style="color:#abe338">path</span>/<span style="color:#abe338">to</span>/<span style="color:#abe338">logs</span>/<span style="color:#abe338">myapp</span>.%<span style="color:#abe338">d</span>{yyyy-MM-dd}.log</fileNamePattern>
  </rollingPolicy>
  <encoder>
    <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %<span style="color:#f5ab35">-5</span>level %logger{<span style="color:#f5ab35">36</span>} - %msg%n</pattern>
  </encoder>
</appender></code></span></span></span></span>

<configuration>
<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
<encoder><!-- 按照上面配置的 LOG_PATTERN 來(lái)打印日志 -->
<pattern>${LOG_PATTERN}</pattern>
</encoder>
</appender>
</configuration>

<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
  <file>/path/to/logs/myapp.log</file>
  <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
    <fileNamePattern>/path/to/logs/myapp.%d{yyyy-MM-dd}.log</fileNamePattern>
    <maxHistory>30</maxHistory>
  </rollingPolicy>
  <encoder>
    <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
  </encoder>
</appender>

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/test")
public class TestController {
private final static Logger logger = LoggerFactory.getLogger(TestController.class);
@RequestMapping("/log")
public String testLog() {
logger.debug("=====測(cè)試日志 debug 級(jí)別打印====");
logger.info("======測(cè)試日志 info 級(jí)別打印=====");
logger.error("=====測(cè)試日志 error 級(jí)別打印====");
logger.warn("======測(cè)試日志 warn 級(jí)別打印=====");
// 可以使用占位符打印出一些參數(shù)信息
String str1 = "blog.yan.com";
String str2 = "blog.csdn.net/yanjun";
 
// 輸出日志內(nèi)容時(shí)，允許使用{}表示一個(gè)占位符，后續(xù)參數(shù)按照位置對(duì)應(yīng)進(jìn)行賦值
logger.info("======閆峻的個(gè)人博客：{}；閆峻的 CSDN 博客：{}", str1, str2);
return "success";
}
}

<configuration>
  <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>
 
  <root level="INFO">
    <appender-ref ref="CONSOLE" />
  </root>
</configuration>

<configuration>
  <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>
 
  <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>/path/to/logs/myapp.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <fileNamePattern>/path/to/logs/myapp.%d{yyyy-MM-dd}.log</fileNamePattern>
      <maxHistory>30</maxHistory>
    </rollingPolicy>
    <encoder>
      <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>
 
  <logger name="com.example" level="DEBUG">
    <appender-ref ref="FILE" />
  </logger>
 
  <root level="INFO">
    <appender-ref ref="CONSOLE" />
  </root>
</configuration>

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Controller
@ResponseBody
public @interface RestController {
String value() default "";
}

spring.mvc.view.prefix=/
spring.mvc.view.suffix=.html

@Controller
@RequestMapping("/test") 表示當(dāng)前類(lèi)中每個(gè)方法映射路徑的統(tǒng)一前綴/test
public class TestController {
@RequestMapping("/get") 針對(duì)方法的映射，加上類(lèi)上的映射配置，則當(dāng)前方法
的請(qǐng)求地址為/test/get
public String get(){
return "user";
}
}

@RequestMapping("/user/{idd}")
public String testPathVariable(@PathVariable(value = "idd") Integer id) {
 
System.out.println("獲取到的 id 為：" + id);
return "success";
}

public String testPathVariable(@PathVariable(value = "idd") Integer id, @PathVariable String name) {
System.out.println("獲取到的 id 為：" + id);
System.out.println("獲取到的 name 為：" + name);
return "success";
}

public String testRequestParam(@RequestParam Integer id) {
System.out.println("獲取到的 id 為：" + id);
return "success";
}

public class User {
private String username;
private String password;
// set get
}

@PostMapping("/form2")
public String testForm(User user) {
System.out.println("獲取到的 username 為：" + user.getUsername());
System.out.println("獲取到的 password 為：" + user.getPassword());
return "success";
}

public class User {
private String username;
private String password;
// set get
}

 
@PostMapping("/user")
public String testRequestBody(@RequestBody User user) {
System.out.println("獲取到的 username 為：" + user.getUsername());
System.out.println("獲取到的 password 為：" + user.getPassword());
return "success";
}