1.新建Spring boot,出現src的包上出現錯誤的叉號：

   分析原因: 你要更新一下選擇專案-----Maven----Updata project，或者刪除jar包---Libraries---Maven Dependencies，然後重新關閉eclipse，重新啟動！

2.如果你專案與別人一樣，怎麼試都不行，還是報錯，或者其它問題：

    分析原因:記住一句話，小問題重啟，大問題重灌！

3.啟動時出現警告：

   分析原因: 專案目錄設計錯誤

                     src
                     |_main
                     |_java
                     |_package name
                     |_xxxController

                     |_Application

                    application.Java 檔案不能直接放在main/java資料夾下，必須要建一個包把他放進去

4.Web專案無法訪問resources/templates/xxx.html檔案

     分析原因:沒有匯入相關模板的依賴

3.啟動時出現NoSuchBeanDefinitionException: No qualifying bean of type [con: No qualifying bean of type

    分析原因:@SpringApplicationConfiguration

5.BasicErrorController提供兩種返回錯誤一種是頁面返回、當你是頁面請求的時候就會返回頁面，另外一種是json請求的時候就會返回json錯誤：

    分析原因:

 @RequestMapping(produces = "text/html")
    public ModelAndView errorHtml(HttpServletRequest request,
            HttpServletResponse response) {
        HttpStatus status = getStatus(request);
        Map<String, Object> model = Collections.unmodifiableMap(getErrorAttributes(
                request, isIncludeStackTrace(request, MediaType.TEXT_HTML)));
        response.setStatus(status.value());
        ModelAndView modelAndView = resolveErrorView(request, response, status, model);
        return (modelAndView == null ? new ModelAndView("error", model) : modelAndView);
    }

    @RequestMapping
    @ResponseBody
    public ResponseEntity<Map<String, Object>> error(HttpServletRequest request) {
        Map<String, Object> body = getErrorAttributes(request,
                isIncludeStackTrace(request, MediaType.ALL));
        HttpStatus status = getStatus(request);
        return new ResponseEntity<Map<String, Object>>(body, status);

          }
 

6.javax.servlet.ServletException: Circular view path [login]: would dispatch back to the current handler URL [/login] again出現錯誤：

 分析原因:

當沒有宣告ViewResolver時，spring會註冊一個預設的ViewResolver，就是JstlView的例項， 該物件繼承自InternalResoureView。
JstlView用來封裝JSP或者同一Web應用中的其他資源，它將model物件作為request請求的屬性值暴露出來, 並將該請求通過javax.servlet.RequestDispatcher轉發到指定的URL.
Spring認為， 這個view的URL是可以用來指定同一web應用中特定資源的，是可以被RequestDispatcher轉發的。
也就是說，在頁面渲染(render)之前，Spring會試圖使用RequestDispatcher來繼續轉發該請求。

解決:消除預設轉發,修改view和path，讓他們不同名。

7.當以.yml結尾的配置出現報錯：

    分析原因：

                 if xxxxxx：

                （空格）xxxxx

8.當出現錯誤java.net.BindException: Address already in use: bind

 解決：開啟Windows程序管理器結束javaw.exe，重新執行。並在每次啟動程式前，結束之前的執行。

9.當出現錯誤Spring Boot Error: java.lang.NoSuchMethodError

   解決：仔細搜尋報錯資訊中的方法名，查看出錯類中是否缺少某方法。筆者此次報錯由於org.springframework.core.ResolvableType.forInstance方法找不到所致，又想起 之前在pom.xml中移除了parent依賴，想起是否改檔案沒有完整下載。查詢了官網說明：當移除parent依賴時，需要增加spring-boot-dependencies的依賴。因此pom.xml中在<dependencies>前新增以下依賴。

<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-dependencies</artifactId>
      <version>1.3.3.RELEASE</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
  </dependencies>
</dependencyManagement>

10.當出現錯誤java -jar myApplication.jar

     分析原因：系統報錯，Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.

    解決：在Application.java主程式入口中加入以下程式碼：

@Bean
public EmbeddedServletContainerFactory servletContainer() {
       
    TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();
    return factory;
       
}

11.啟動spring boot報錯

    解決：這個原因是maven依賴包衝突，有重複的依賴。 檢查一下你引入的jar包裡面是不是有相同的方法名。

12.結果啟動時報錯BeanCreationException：

org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'userController':
Injection of autowired dependencies failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.caizhaotu.dao.user.UserRepository com.caizhaotu.controller.user.UserController.userRepository;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Invocation of init method failed; nested exception is java.util.NoSuchElementException
解決：application.java 可以放在controller、service、dao層都可以，但是要保證application.java 包位置處於所有層的上級，比如com.xxx.web、com.xxx.service、com.xxx.dao。把application.java放在com.xxx即可。@SpringBootApplication 註解效果等於 @Configuration，@EnableAutoConfiguration 及 @ComponentScan 這三個註解一起使用，所以不要在 Controller 在啟動類上面新增 @EnableAutoConfiguration 。

13.class TaskImpl 中注入失敗，目標變數為null並報錯

     解決：1.一些業務細節程式碼已經單機跑通了。 2.使用了@SpringBootApplication進行自動化配置與掃描。3.沒有遺漏的@Component。

14.Spring Boot單元測試報錯

java.lang.NoClassDefFoundError: org/mockito/internal/util/MockUtil

    at org.springframework.boot.test.mock.mockito.MockReset.<clinit>(MockReset.java:56)
    at org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener.beforeTestMethod(ResetMocksTestExecutionListener.java:44)
    at org.springframework.test.context.TestContextManager.beforeTestMethod(TestContextManager.java:269)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
Caused by: java.lang.ClassNotFoundException: org.mockito.internal.util.MockUtil
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

  解決：在build.gradle引用compile中加入[group: 'org.mockito', name: 'mockito-all', version: '1.10.19']

15.eclipse新建springboot的專案，出現以下錯誤The type org.springframework.context.ConfigurableApplicationContext cannot be resolved. It is indirectly referenced from required .class files

  解決：執行 mvn dependency:purge-local-repository   mvn clean

16.[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.4.3.RELEASE:repackage (default-cli) on project springboot_1: Execution default-cli of goal org.springframework.boot:spring-boot-maven-plugin:1.4.3.RELEASE:repackage failed: Source must refer to an existing file -> [Help 1]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException Process finished with exit code 1

   解決：直接使用maven的package命令，即可完成打包，若有新的內容新增，可以使用spring-boot-maven-plugin的repackage命令.詳細步驟如下圖

17.使用spring boot 使用druid，啟動tomcat時報錯：提示由於unregister mbean error導致無法啟動啟動類。

     解決：在配置檔案加入spring.jmx.enabled: false

18. 出現這樣的錯誤：at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:467) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]

      解決：刪除jar包，重新匯入。

19.在spring boot專案中出現不能載入iframe 頁面報一個"Refused to display 'http://......' in a frame because it set 'X-Frame-Options' to 'DENY'. "錯誤

解決：因spring Boot採取的java config，在配置spring security的位置新增：

@Override
protected void configure(HttpSecurity http) throws Exception {
       http.headers().frameOptions().disable();
     http
      .csrf().disable();
     http
      .authorizeRequests()
             .anyRequest().authenticated();
      http.formLogin()
          .defaultSuccessUrl("/platform/index",true)
          .loginPage("/login")
          .permitAll()
        .and()
          .logout()
           .logoutUrl("/logout");
      
      http.addFilterBefore(wiselyFilterSecurityInterceptor(),FilterSecurityInterceptor.class);
      
}

20.錯誤提示如下:

Caused by: java.lang.IllegalStateException: Tomcat connector in failed state

at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.start(TomcatEmbeddedServletContainer.java:159) ~[spring-boot-1.3.6.RELEASE.jar:1.3.6.RELEASE]

... 15 common frames omitted

2017-04-14 19:36:55.419 ERROR 19420 --- [  restartedMain] o.a.coyote.http11.Http11NioProtocol      : Failed to start end point associated with ProtocolHandler ["http-nio-8080"]

    解決：是NI server佔據了8080埠。

21.出現springboot框架maven構建fastJson啟動報錯。

Exception in thread "main" java.lang.IllegalStateException: Failed to read Class-Path 
attribute from manifest of jar file:
/E:/myRepository/repositotyExe/repositoty/com/alibaba/fastjson/1.2.32/fastjson-1.2.32.jar
at org.springframework.boot.devtools.restart.ChangeableUrls.
getUrlsFromClassPathOfJarManifestIfPossible(ChangeableUrls.java:110)
at org.springframework.boot.devtools.restart.ChangeableUrls.fromUrlClassLoader
(ChangeableUrls.java:96)
at org.springframework.boot.devtools.restart.DefaultRestartInitializer.getUrls
(DefaultRestartInitializer.java:93)
at org.springframework.boot.devtools.restart.DefaultRestartInitializer.getInitialUrls(
DefaultRestartInitializer.java:56)
at org.springframework.boot.devtools.restart.Restarter.<init>(Restarter.java:140)
at org.springframework.boot.devtools.restart.Restarter.initialize(Restarter.java:546)
at org.springframework.boot.devtools.restart.RestartApplicationListener.onApplication
StartingEvent(RestartApplicationListener.java:67)
at org.springframework.boot.devtools.restart.RestartApplicationListener.onApplicationEvent
(RestartApplicationListener.java:45)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener
(SimpleApplicationEventMulticaster.java:167)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent
(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent
(SimpleApplicationEventMulticaster.java:122)
at org.springframework.boot.context.event.EventPublishingRunListener.starting(
EventPublishingRunListener.java:68)
at org.springframework.boot.SpringApplicationRunListeners.starting(SpringAppl
icationRunListeners.java:48)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151)
at com.bldz.springboot.Spring_Boot_JdbcTemplate.App.main(App.java:14)
Caused by: java.util.zip.ZipException: invalid LOC header (bad signature)
	at java.util.zip.ZipFile.read(Native Method)
	at java.util.zip.ZipFile.access$1400(ZipFile.java:60)
	at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:717)
	at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:419)
	at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
	at sun.misc.IOUtils.readFully(IOUtils.java:65)
	at java.util.jar.JarFile.getBytes(JarFile.java:425)
	at java.util.jar.JarFile.getManifestFromReference(JarFile.java:193)
	at java.util.jar.JarFile.getManifest(JarFile.java:180)
	at org.springframework.boot.devtools.restart.ChangeableUrls.getUrlsFromCl
assPathOfJarManifestIfPossible(ChangeableUrls.java:107)
	... 16 more

    解決：刪除maven倉庫下的 /E:/myRepository/repositotyExe/repositoty/com/alibaba/fastjson/1.2.32/fastjson-1.2.32.jar,重新編譯即可!

22.Spring Boot Maven專案啟動報錯
ERROR 2172 --- [ main] o.s.boot.SpringApplication : Application startup failed    org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Jetty servlet container

at org.springframework.boot.context.embedded.jetty.JettyEmbeddedServletContainer.start(JettyEmbeddedServletContainer.java:124) ~[spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.startEmbeddedServletContainer(EmbeddedWebApplicationContext.java:293) ~[spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:141) ~[spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:764) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:357) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:305) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1124) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1113) [spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
at com.easemob.weichat.gateway.im.IMRoutewayServerStarter.main(IMRoutewayServerStarter.java:28) [classes/:na]
Caused by: java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_112]
at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_112]
at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_112]
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.8.0_112]
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) ~[na:1.8.0_112]
at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:321) ~[jetty-server-9.2.14.v20151106.jar:9.2.14.v20151106]
at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80) ~[jetty-server-9.2.14.v20151106.jar:9.2.14.v20151106]
at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:236) ~[jetty-server-9.2.14.v20151106.jar:9.2.14.v20151106]
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) ~[jetty-util-9.2.14.v20151106.jar:9.2.14.v20151106]
at org.springframework.boot.context.embedded.jetty.JettyEmbeddedServletContainer.start(JettyEmbeddedServletContainer.java:118) ~[spring-boot-1.3.1.RELEASE.jar:1.3.1.RELEASE]
... 10 common frames omitted

     解決：典型的埠被佔用，，改下你的boot啟動埠。

23.The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced from
required .class files
是缺少serverlet的引用庫，

  解決：
    1.工程右鍵-properties->java build path
    2.在java build path的libraries tab頁中選擇Add external Jars按鈕
   3. 選擇eclipse的安裝目錄，我本機的路徑如下，你自己需要根據自己的路徑查詢新增。E:\eclipse-java-indigo-SR1-win32\eclipse\plugins 選擇javax.servlet.jsp_2.0.0.v201101211617.jar；javax.servlet_2.5.0.v201103041518.jar 進行新增即可
   註釋：由於版本不同，檔案包名可能稍有區別。

24.Ambiguous mapping. Cannot map 'XXXController' method

解決：

@RequestMapping(value=XXX) 可能是同一個Controller或者 是不同的Controller。 XXX重名導致。

解決：

第一種：出現這種情況一般是workspace的配置檔案中出現了.lock檔案（workspace/.metadata/.lock），鎖定了workspace。把.lock檔案刪除即可。如果該檔案不能刪除，可能是因為javaw.exe程序未結束，結束該程序及eclipse.exe程序即可刪除。
第二種：重新啟動電腦。

26.missing artifact com.oracle:ojdbc6:jar:11.2.0.1.0問題解決 ojdbc包pom.xml出錯

原因：Oracle的ojdbc.jar是收費的，所以maven的中央倉庫中沒有這個資源，只能通過配置本地庫才能載入到專案中去。

解決：

1.首先確定你是否有安裝oracle，如果有安裝的話，找到ojdbc6.jar包
D:\app\Administrator\product\11.2.0\dbhome_1\jdbc\lib\ojdbc6.jar(這是我路徑，你們的可能與我不同)
2.將ojdbc6.jar包新增到maven本地倉庫或者手動加入jar包。
3.最後找到專案的pom.xml引入如下程式碼，右擊專案名稱，找到maven，找到update project更新下就ok了。

27.tomcat用shell定時清理日誌

解決：

1.寫一個/usr/local/script/cleanTomcatlog.sh指令碼

#!/bin/bash
export LANG=zh_CN
#tomcat1日誌檔案路徑
export WEB_TOMCAT1=/usr/local/tomcat1/logs
#tomcat2日誌檔案路徑
export WEB_TOMCAT2=/usr/local/tomcat2/logs
#tomcat3日誌檔案路徑
export WEB_TOMCAT3=/usr/local/tomcat3/logs
echo > ${WEB_TOMCAT1}/catalina.out
echo > ${WEB_TOMCAT2}/catalina.out
echo > ${WEB_TOMCAT3}/catalina.out
find ${WEB_TOMCAT1}/* -mtime +5 -type f -exec rm -f {} \;
find ${WEB_TOMCAT2}/* -mtime +5 -type f -exec rm -f {} \;
find ${WEB_TOMCAT3}/* -mtime +5 -type f -exec rm -f {} \;

2 .設定cleanTomcatlog.sh指令碼可執行

chmod a+x cleanTomcatlog.sh

3.在控制檯上輸入以下命令

  crontab -e

4.按i鍵編輯這個文字檔案，輸入以下內容，每天凌晨4：30重啟tomcat

  30 04 * * * /usr/local/script/cleanTomcatlog.sh

按esc鍵退出編輯，輸入wq回車儲存

5.重啟定時任務

[[email protected]]# service crond stop

[[email protected]]# service crond start

28.Springboot清理logs日誌

解決：

#!/bin/bash
#路徑
logs_path="/mnt/springboot/logs"
find $logs_path -mtime +30 -name "access.log.log.*" -exec rm -rf {} \;
find $logs_path -mtime +30 -name "*.log.*" -exec rm -rf {} \;
>$logs_path/error.log;

29.SpringBoot做檔案上傳時出現了The field file exceeds its maximum permitted size of 1048576 bytes.錯誤

解決：

Spring Boot 1.3.x或者之前

multipart.maxFileSize=100MB
multipart.maxRequestSize=1000MB

Spring Boot 1.4.x

spring.http.multipart.maxFileSize=100MB
spring.http.multipart.maxRequestSize=1000MB

很多人設定了multipart.maxFileSize但是不起作用，是因為1.4版本以上的配置改了，詳見官方文件：spring boot 1.4
Spring Boot 2.0之後
 

spring.servlet.multipart.max-file-size=100MB
spring.servlet.multipart.max-request-size=1000MB

@Configuration  
@SpringBootApplication  
public class Application {  
  
    public static void main(String[] args) throws Exception {  
        SpringApplication.run(Application.class, args);  
    }  
  
  
    /**  
     * 檔案上傳配置  
     * @return  
     */  
    @Bean  
    public MultipartConfigElement multipartConfigElement() {  
        MultipartConfigFactory factory = new MultipartConfigFactory();  
        //檔案最大  
        factory.setMaxFileSize("10240MB"); //KB,MB  
        /// 設定總上傳資料總大小  
        factory.setMaxRequestSize("102400MB");  
        return factory.createMultipartConfig();  
    }  
  
}  

錯誤日誌：

09:09:55.044 logback [RMI TCP Connection(9)-127.0.0.1] DEBUG s.d.s.w.r.o.OperationResponseClassReader - Setting spring response class to:ServerResponse
09:09:55.044 logback [RMI TCP Connection(9)-127.0.0.1] DEBUG s.d.s.r.o.OperationAuthReader - Authorization count 0 for method resetPassword
09:09:55.046 logback [RMI TCP Connection(9)-127.0.0.1] ERROR s.d.s.r.o.OperationHttpMethodReader - Invalid http method: postValid ones are [[Lorg.springframework.web.bind.annotation.RequestMethod;@5c8bcf2a]
java.lang.IllegalArgumentException: No enum constant org.springframework.web.bind.annotation.RequestMethod.post
    at java.lang.Enum.valueOf(Enum.java:238) ~[na:1.8.0_171]
    at org.springframework.web.bind.annotation.RequestMethod.valueOf(RequestMethod.java:35) ~[spring-web-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at springfox.documentation.swagger.readers.operation.OperationHttpMethodReader.apply(OperationHttpMethodReader.java:50) ~[springfox-swagger-common-2.4.0.jar:2.4.0]
    at springfox.documentation.spring.web.plugins.DocumentationPluginsManager.operation(DocumentationPluginsManager.java:113) [springfox-spring-web-2.4.0.jar:2.4.0]
    at springfox.documentation.spring.web.readers.operation.ApiOperationReader.read(ApiOperationReader.java:80) [springfox-spring-web-2.4.0.jar:2.4.0]
    at springfox.documentation.spring.web.scanners.CachingOperationReader$1.load(CachingOperationReader.java:50) [springfox-spring-web-2.4.0.jar:2.4.0]
    at springfox.documentation.spring.web.scanners.CachingOperationReader$1.load(CachingOperationReader.java:48) [springfox-spring-web-2.4.0.jar:2.4.0]
    at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3628) [guava-20.0.jar:na]
    at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2336) [guava-20.0.jar:na]
    at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2295) [guava-20.0.jar:na]
    at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2208) [guava-20.0.jar:na]

解決:

將小寫post改成大寫就好了  或者 @RequestMapping 註解增加 method = RequestMethod.POST

	@ApiOperation(value="獲取所有的區域資訊", notes="獲取區域列表", httpMethod = "GET", response =Area.class, produces = "application/json")
	@RequestMapping(value = "/listarea", method = RequestMethod.GET)
或者
	@ApiOperation(value="獲取所有的區域資訊", notes="獲取區域列表", httpMethod = "POST", response =Area.class, produces = "application/json")
	@RequestMapping(value = "/listarea", method = RequestMethod.POST)

31. 無法下載SpringBoot 2.0.0.M3和SpringCloud Finchley.M2

解決：
+ 在pom.xml檔案里加上如下程式碼(可參考[product的pom.xml](https://gitlab-demo.com/SpringCloud_Sell/product/blob/master/pom.xml))：

<repositories>
    <repository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>https://repo.spring.io/snapshot</url>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </repository>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </repository>
</repositories>

<pluginRepositories>
    <pluginRepository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>https://repo.spring.io/snapshot</url>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </pluginRepository>
    <pluginRepository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </pluginRepository>
</pluginRepositories>

+ 若在自己配置了國內maven庫映象後無法下載以上版本，則請將映象註釋掉，用maven預設的中央倉庫下載（如果覺得太慢，就用科學上網）

 32. 遇到Eureka Client無法啟動的情況

解決：
+ 如果用的版本是SpringBoot 2.0.0.M3和SpringCloud Finchley.M2按照視訊可正常啟動
+ 如果是高版本無法啟動時，需要在pom.xml中加入如下依賴：

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

33.order專案的server模組不能正常引入product專案中的client模組
出現原因
+ 可能是因為product專案的client模組還沒有打包成功，order專案的server模組不能找不到該依賴
解決：
+ 1.先對product專案,在父模組下進行maven打包

mvn clean install -Dmaven.test.skip=true

+ 2.再進入order專案，用同樣的命令再進行打包

待續....