部署项目时候报子组件加载异常，查看了一下报错指向了druid加载异常，具体什么问题看了网上好多文章，都不太一样，tomcat中只有一个war包，druid配置了两个数据源，

Dec-2020 17:19:43.992 信息 [main] org.apache.catalina.startup.Catalina.load 服务器在[447]毫秒内初始化
04-Dec-2020 17:19:44.013 信息 [main] org.apache.catalina.core.StandardService.startInternal 正在启动服务[Catalina]
04-Dec-2020 17:19:44.013 信息 [main] org.apache.catalina.core.StandardEngine.startInternal 正在启动 Servlet 引擎：[Apache Tomcat/9.0.40]
04-Dec-2020 17:19:44.197 信息 [main] org.apache.catalina.startup.HostConfig.deployWAR 正在部署web应用程序存档文件[/root/apache-tomcat-9.0.40/webapps/FujianDataServer.war]
04-Dec-2020 17:19:47.997 信息 [main] org.apache.jasper.servlet.TldScanner.scanJars 至少有一个JAR被扫描用于TLD但尚未包含TLD。为此记录器启用调试日志记录，以获取已扫描但未在其中找到TLD的完整JAR列表。在扫描期间跳过不需要的JAR可以缩短启动时间和JSP编译时间。
04-Dec-2020 17:19:52.824 信息 [main] org.apache.catalina.startup.HostConfig.deployWAR web应用程序存档文件[/root/apache-tomcat-9.0.40/webapps/FujianDataServer.war]的部署已在[8,625]ms内完成
04-Dec-2020 17:19:52.824 信息 [main] org.apache.catalina.startup.HostConfig.deployWAR 正在部署web应用程序存档文件[/root/apache-tomcat-9.0.40/webapps/FujianDataServer-0.0.1-SNAPSHOT.war]
04-Dec-2020 17:19:55.853 信息 [main] org.apache.jasper.servlet.TldScanner.scanJars 至少有一个JAR被扫描用于TLD但尚未包含TLD。为此记录器启用调试日志记录，以获取已扫描但未在其中找到TLD的完整JAR列表。在扫描期间跳过不需要的JAR可以缩短启动时间和JSP编译时间。
04-Dec-2020 17:20:00.133 严重 [main] org.apache.catalina.startup.HostConfig.deployWAR 部署 Web 应用程序 archive [/root/apache-tomcat-9.0.40/webapps/FujianDataServer-0.0.1-SNAPSHOT.war] 时出错
   java.lang.IllegalStateException: 启动子级时出错
       at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:720)
       at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690)
       at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:706)
       at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:978)
       at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1848)
       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
       at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
       at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:773)
       at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427)
       at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1576)
       at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:309)
       at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
       at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:423)
       at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:366)
       at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:936)
       at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:843)
       at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
       at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
       at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
       at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
       at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
       at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
       at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
       at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)
       at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
       at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
       at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
       at org.apache.catalina.startup.Catalina.start(Catalina.java:772)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       at java.lang.reflect.Method.invoke(Method.java:498)
       at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:342)
       at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:473)
   Caused by: org.apache.catalina.LifecycleException: 无法启动组件[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/FujianDataServer-0.0.1-SNAPSHOT]]
       at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
       at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
       at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717)
       ... 37 more
   Caused by: org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [com.alibaba.druid.filter.stat.StatFilter@579fd1d1] with key 'statFilter'; nested exception is javax.management.InstanceAlreadyExistsException: com.alibaba.druid.filter.stat:name=statFilter,type=StatFilter
       at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:625)
       at org.springframework.jmx.export.MBeanExporter.lambda$registerBeans$2(MBeanExporter.java:551)
       at java.util.HashMap.forEach(HashMap.java:1289)
       at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:551)
       at org.springframework.jmx.export.MBeanExporter.afterSingletonsInstantiated(MBeanExporter.java:434)
       at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:866)
       at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
       at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
       at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
       at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
       at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
       at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
       at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:157)
       at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:137)
       at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:91)
       at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:171)
       at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5166)
       at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
       ... 38 more
   Caused by: javax.management.InstanceAlreadyExistsException: com.alibaba.druid.filter.stat:name=statFilter,type=StatFilter
       at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)
       at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)
       at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)
       at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)
       at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)
       at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
       at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:137)
       at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:671)
       at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:615)
       ... 55 more

postman用raw,JSON格式提交，那angularJS $http的请求头文件的Content-Type如何定义？

wang00ka

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