xamarin.android – 初始化调试器时出错：Mono.Debugging.Soft.DisconnectedException（xamarin entry）

25-02-20 10

这篇文章主要围绕xamarin.android–初始化调试器时出错：Mono.Debugging.Soft.DisconnectedException和xamarinentry展开，旨在为您提供一份详

这篇文章主要围绕xamarin.android – 初始化调试器时出错：Mono.Debugging.Soft.DisconnectedException和xamarin entry展开，旨在为您提供一份详细的参考资料。我们将全面介绍xamarin.android – 初始化调试器时出错：Mono.Debugging.Soft.DisconnectedException的优缺点，解答xamarin entry的相关问题，同时也会为您带来.conn.ManagedClientConnectionImpl@604ed9f0 java.net.ConnectException: Connection refused: connect、Android Robolectric – ContentProvider中queryBuilder.query()中的RuntimeException / InstantiationException、Android Studio 3.0 DexArchiveBuilderException、Cannot load connection class because of underlying exception: com.mysql.cj.exceptions.WrongArgume...的实用方法。

本文目录一览：

xamarin.android – 初始化调试器时出错：Mono.Debugging.Soft.DisconnectedException（xamarin entry）
.conn.ManagedClientConnectionImpl@604ed9f0 java.net.ConnectException: Connection refused: connect
Android Robolectric – ContentProvider中queryBuilder.query()中的RuntimeException / InstantiationException
Android Studio 3.0 DexArchiveBuilderException
Cannot load connection class because of underlying exception: com.mysql.cj.exceptions.WrongArgume...

xamarin.android – 初始化调试器时出错：Mono.Debugging.Soft.DisconnectedException（xamarin entry）

升级到4.0.4版之后,我开始得到与调试器的连接丢失错误.我试图重新安装所有组件(monodevelop,android sdk,java sdk等).我还清理了注册表,重新安装后重新启动.但所有努力都没有任何区别.所有android os版本(1.6到4.0)都在调试时都有相同的错误.以前的版本在调试期间大部分时间都有效.在Xamarin网站上找到答案非常困难.如果有人能够阐明这个问题,我会非常感激.谢谢.

解决方法

我尝试了所有重启等等,并在我的挫折期间找到了这个帖子.最后我尝试在发布模式而不是调试中构建,并且神奇地解决了问题并附加了调试器.之后我可以切换回调试而没有任何麻烦.

.conn.ManagedClientConnectionImpl@604ed9f0 java.net.ConnectException: Connection refused: connect

DEBUG 2016-11-07 14:32:47,518 Get connection for route {}->http://127.0.0.1:8087->http://rdsearch.zhaopin.com:80
DEBUG 2016-11-07 14:32:47,519 Connecting to 127.0.0.1:8087
DEBUG 2016-11-07 14:32:48,530 Connection org.apache.http.impl.conn.DefaultClientConnection@91161c7 closed
DEBUG 2016-11-07 14:32:48,531 Connection org.apache.http.impl.conn.DefaultClientConnection@91161c7 shut down
DEBUG 2016-11-07 14:32:48,532 Releasing connection org.apache.http.impl.conn.ManagedClientConnectionImpl@604ed9f0
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:882)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)

Android Robolectric – ContentProvider中queryBuilder.query()中的RuntimeException / InstantiationException

我在ContentProvider上进行了大约十次测试,只使用了sqlite; all pass保存在Content Provider的query()方法中通过queryBuilder.query()的两个.

正在测试的方法在实际应用中起作用！

这是API 17 r2和RoboLectric：
robolectric-2.0-α-3-20130417.013705-46-罐与 – dependencies.jar

@Override
public Cursor query(Uri uri,String[] projection,String selection,String[] selectionArgs,String sortOrder) {
    Log.d(Constants.TAG,"MyContentProvider.query()");
    switch(matcher.match(uri)) {
    case ITEM: // OK
        selection = "_id = ?";
        selectionArgs = new String[]{ Long.toString(ContentUris.parseId(uri)) };
    case ITEMS: // OK
        break;
    default:
        throw new IllegalArgumentException("Did not recognize URI " + uri);
    }
    // build the query with sqliteQueryBuilder
    sqliteQueryBuilder qBuilder = new sqliteQueryBuilder();
    qBuilder.setTables(TABLE_NAME);

    // query the database and get result in cursor
    final sqliteDatabase db = mDatabase.getReadableDatabase();
    Cursor resultCursor = qBuilder.query(db,// Line 112 in trace
            projection,selection,selectionArgs,null,sortOrder,null);
    resultCursor.setNotificationUri(getContext().getContentResolver(),uri);
    return resultCursor;
}

这是追溯：

java.lang.RuntimeException: java.lang.InstantiationException
    at org.robolectric.bytecode.ShadowWrangler.createShadowFor(ShadowWrangler.java:300)
    at org.robolectric.bytecode.ShadowWrangler.initializing(ShadowWrangler.java:74)
    at org.robolectric.bytecode.RobolectricInternals.initializing(RobolectricInternals.java:90)
    at android.database.sqlite.sqliteQuery.$$robo$init(sqliteQuery.java)
    at android.database.sqlite.sqliteClosable.<init>(sqliteClosable.java:26)
    at android.database.sqlite.sqliteProgram.<init>(sqliteProgram.java:41)
    at android.database.sqlite.sqliteQuery.<init>(sqliteQuery.java:37)
    at android.database.sqlite.sqliteDirectCursorDriver.query(sqliteDirectCursorDriver.java:44)
    at android.database.sqlite.sqliteDatabase.rawQueryWithFactory(sqliteDatabase.java:1314)
    at android.database.sqlite.sqliteQueryBuilder.query(sqliteQueryBuilder.java:400)
    at android.database.sqlite.sqliteQueryBuilder.query(sqliteQueryBuilder.java:333)
    at com.example.readingsprovider.ReadingsContentProvider.query(ReadingsContentProvider.java:112)
    at com.example.readingsprovider.test.ContentProviderTest.testUpdateMultipleWithoutWhere(ContentProviderTest.java:110)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:267)
    at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
    at org.junit.runners.BlockJUnit4ClassRunner.runchild(BlockJUnit4ClassRunner.java:71)
    at org.junit.runners.BlockJUnit4ClassRunner.runchild(BlockJUnit4ClassRunner.java:49)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runchildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:202)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.InstantiationException
    at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:30)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at java.lang.class.newInstance0(Class.java:357)
    at java.lang.class.newInstance(Class.java:310)
    at org.robolectric.bytecode.ShadowWrangler.createShadowFor(ShadowWrangler.java:293)
    at org.robolectric.bytecode.ShadowWrangler.initializing(ShadowWrangler.java:74)
    at org.robolectric.bytecode.RobolectricInternals.initializing(RobolectricInternals.java:90)
    at android.database.sqlite.sqliteQuery.$$robo$init(sqliteQuery.java)
    at android.database.sqlite.sqliteClosable.<init>(sqliteClosable.java:26)
    at android.database.sqlite.sqliteProgram.<init>(sqliteProgram.java:41)
    at android.database.sqlite.sqliteQuery.<init>(sqliteQuery.java:37)
    at android.database.sqlite.sqliteDirectCursorDriver.$$robo$$sqliteDirectCursorDriver_7ac1_query(sqliteDirectCursorDriver.java:44)
    at android.database.sqlite.sqliteDirectCursorDriver.query(sqliteDirectCursorDriver.java)
    at android.database.sqlite.sqliteDatabase.$$robo$$sqliteDatabase_ab15_rawQueryWithFactory(sqliteDatabase.java:1314)
    at android.database.sqlite.sqliteDatabase.rawQueryWithFactory(sqliteDatabase.java)
    at android.database.sqlite.sqliteQueryBuilder.$$robo$$sqliteQueryBuilder_ba4d_query(sqliteQueryBuilder.java:400)
    at android.database.sqlite.sqliteQueryBuilder.query(sqliteQueryBuilder.java)
    at android.database.sqlite.sqliteQueryBuilder.$$robo$$sqliteQueryBuilder_ba4d_query(sqliteQueryBuilder.java:333)
    at android.database.sqlite.sqliteQueryBuilder.query(sqliteQueryBuilder.java)
    at com.example.readingsprovider.ReadingsContentProvider.query(ReadingsContentProvider.java:112)
    at com.example.readingsprovider.test.ContentProviderTest.testUpdateMultipleWithoutWhere(ContentProviderTest.java:110)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    ... 21 more

可以告诉我这是否是Robolectric的限制,还是我的不好？非常感谢！

附：如果Reflection API将失败的类名放在InstantiationException消息中,难道不是梦幻般的吗？

解决方法

我的项目有同样的问题,终于能够用一些谷歌搜索和U Avalos的前一个答案来解决它

1.创建自定义sqliteShadow

@Implements(value = sqliteDatabase.class,inheritImplementationMethods = true)
public class CustomsqliteShadow extends ShadowsqliteDatabase {

    @Implementation
    public Cursor rawQueryWithFactory (sqliteDatabase.CursorFactory cursorFactory,String sql,String editTable,CancellationSignal cancellationSignal) {
      return rawQueryWithFactory(cursorFactory,sql,editTable);
    }
}

2.将@Config注释添加到测试中

要使用自定义阴影类,可以在robolectric2中使用@Config注释

@RunWith(RobolectricTestRunner.class)
@Config( shadows = {CustomsqliteShadow.class})
public class ContentProviderTest {

参考

http://robolectric.blogspot.co.at/2013/05/configuring-robolectric-20.html

Android Studio 3.0 DexArchiveBuilderException

编译仪器测试时出现此错误。

错误：com.android.builder.dexing.DexArchiveBuilderException：无法处理/Users/rafaelruizmunoz/SourceTree/Weather/app/build/intermediates/transforms/desugar/androidTest/debug/1.jar
错误：com.android.builder.dexing.DexArchiveBuilderException：分解org / assertj /
core / api / LongPredicateAssert.class时出错
错误：com.android.dx.cf.code.SimException：默认或静态接口方法不带–min-sdk-version> = 24

我尝试启用/禁用multiDexEnabled自己的功能，build.gradle但无济于事。

我android的build.gradle：

android {    compileSdkVersion 27    defaultConfig {        applicationId "com.**.weather"        minSdkVersion 16        targetSdkVersion 27        versionCode 1        versionName "1.0"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"        multiDexEnabled = true    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile(''proguard-android.txt''), ''proguard-rules.pro''        }    }    compileOptions {        targetCompatibility 1.8        sourceCompatibility 1.8    }}

答案1

小编典典

在gradle.properties添加android.enableD8=true这应该工作。

请注意，导出并上传apk以启用d8播放商店时，存在一个已知的错误。从Play商店下载该应用后，该应用将无法在某些设备上运行。

https://issuetracker.google.com/issues/64740479

Cannot load connection class because of underlying exception: com.mysql.cj.exceptions.WrongArgume...

今天在使用springboot整合SSM的时候，配置好以后启动项目，报了一个这样的异常

java.sql.SQLNonTransientConnectionException: Cannot load connection class because of underlying exception: com.mysql.cj.exceptions.WrongArgumentException: Malformed database URL, failed to parse the connection string near '';characterEncoding=UTF-8''.
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110) ~[mysql-connector-java-8.0.17.jar:8.0.17]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) ~[mysql-connector-java-8.0.17.jar:8.0.17]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) ~[mysql-connector-java-8.0.17.jar:8.0.17]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) ~[mysql-connector-java-8.0.17.jar:8.0.17]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73) ~[mysql-connector-java-8.0.17.jar:8.0.17]
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:79) ~[mysql-connector-java-8.0.17.jar:8.0.17]
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:131) ~[mysql-connector-java-8.0.17.jar:8.0.17]
    at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219) ~[mysql-connector-java-8.0.17.jar:8.0.17]
    at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:136) ~[HikariCP-3.2.0.jar:na]
    at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:369) ~[HikariCP-3.2.0.jar:na]
    at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:198) ~[HikariCP-3.2.0.jar:na]
    at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:467) [HikariCP-3.2.0.jar:na]
    at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:541) [HikariCP-3.2.0.jar:na]
    at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) [HikariCP-3.2.0.jar:na]
    at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) [HikariCP-3.2.0.jar:na]
    at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:157) [spring-jdbc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115) [spring-jdbc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78) [spring-jdbc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80) [mybatis-spring-2.0.2.jar:2.0.2]
    at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67) [mybatis-spring-2.0.2.jar:2.0.2]
    at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:85) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140) [mybatis-3.5.2.jar:3.5.2]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_20]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_20]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_20]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_20]
    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426) [mybatis-spring-2.0.2.jar:2.0.2]
    at com.sun.proxy.$Proxy53.selectList(Unknown Source) [na:na]
    at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223) [mybatis-spring-2.0.2.jar:2.0.2]
    at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80) [mybatis-3.5.2.jar:3.5.2]
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:57) [mybatis-3.5.2.jar:3.5.2]
    at com.sun.proxy.$Proxy54.selectAllUser(Unknown Source) [na:na]
    at com.springboot.ssm.service.impl.UserServiceImpl.selectAllUser(UserServiceImpl.java:19) [classes/:na]
    at com.springboot.ssm.controller.UserController.selectAllUser(UserController.java:21) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_20]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_20]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_20]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_20]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:645) [javax.servlet-api-4.0.1.jar:4.0.1]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:750) [javax.servlet-api-4.0.1.jar:4.0.1]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_20]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_20]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.24.jar:9.0.24]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_20]

以及这个问题

查阅了网上的资料，发现应该是mysql的驱动更新

原：

现：

代码：

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone = GMT

更改成这两串代码就可以了

1234567.

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