Tag Archives: intellectual idea

[Solved] itextpdf Read PDF File Error: Rebuild failed: trailer not found.

Recently, I used itextpdf to print invoices, but there was an error when reading the file stream. The following is the key code

ClassPathResource classPathResource = new ClassPathResource("/template/RU_HK_INVOICE_TEMPLATE.pdf");
InputStream inputStream = classPathResource.getInputStream();
reader = new PdfReader(inputStream);// read the template of pdf

The following errors are reported in the new PdfReader(inputStream) each time:

com.itextpdf.text.exceptions.InvalidPdfException: Rebuild failed: trailer not found.; Original message: xref subsection not found at file pointer

Maven will use pom XML configuration files uniformly encode the project, but some files do not need to be re encoded, such as PDF template files; After recoding, the PDF template structure may be damaged, resulting in the unavailability of the files generated after compilation, as shown in the following figure

Therefore, it is necessary to filter out the files that do not need to be encoded: filter all files with the suffix .pdf or .p8 and do not encode them uniformly. Need to be configured in the pom.xml file nonFilteredFileExtension tag

<!-- Filter the suffixes of files that do not need to be transcoded pdf -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>3.0.1</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                    <useDefaultDelimiters>false</useDefaultDelimiters>
                    <nonFilteredFileExtensions>
 						<nonFilteredFileExtension>pdf</nonFilteredFileExtension>
                    </nonFilteredFileExtensions>
                </configuration>
            </plugin>

[Solved] IntelliJ IDEA Compile Error: Errorjava Compilation failed internal java compiler error

IntelliJ idea tutorial (contents)

Error content:

information:using javac 1.8.0_ 73 to compile Java sources
information:java: javactask: source release 1.8 requires target release 1.8
information:java: errors occurred while compiling module 'ezsonar'
information:module "ezsonar" was fully rebuilt due to project configuration/dependencies changes
Information:2016/11/21 14:08 - Compilation completed with 1 error and 0 warnings in 5s 242ms
Error:java: Compilation failed: internal java compiler error

 

Error reporting diagram:

Solution:

If it is not the same as the one in the figure, click the one on the right to add the module of your project and select the corresponding version of JDK required by your project. Just compile it again.

IDEA Error: ERROR 16720 —[ restartMain] o.a.coyote. http11.Http119Protocol: Failed to sta

Idea reports error: ERROR 16720 – [restartedmain] o.a.coyote http11.Http11NioProtocol : Failed to start end point associated with ProtocolHandler [“http-nio-80”]

1. Error 16720

idea version is IntelliJ idea 2018.3.6 x64

The error reporting codes of running items are as follows:


the detailed error reporting code of the third figure

Sun May 29 10:42:36 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:36 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:37 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:37 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:37 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:37 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:37 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:37 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:37 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun May 29 10:42:37 CST 2022 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

2. Error reporting causes and Solutions

1. cause

Port number 80 is occupied

2. solutions

1. change the port number and use the idle port number

the occupied port number here is 80, and the idle port number is 81

(1) Find the configuration file to write the port number

server:
  port: 80

(2) Change the port number to an idle and unoccupied port number

server:
  port: 81

 

How to Solve Error: Error parsing mapper XML

[Solved] Error parsing Mapper XML

Error parsing mapper xml
this error message is essentially a mapper XML error
failed resolve xxx XML, etc.
here we analyze some problems that will not become popular when writing, and that will cause errors when starting

1. ID conflict

The conflicts here are
resultmap

<resultMap type="com.newtouch.business.module.dto.T01agentComDTO" id="t01agentComMap">

<resultMap type="com.cpi.newtouch.business.module.dto.T01comDTO" id="t01agentComMap">

Specific SQL

<select id="findBy" >
<update id="findBy">

As long as two or more IDs are the same, an error will be reported. This usually happens because you don’t pay attention to copy and paste. You need to be careful!

2. Return type error

<resultMap type="com.newtouch.business.module.dto.T01agentComDTO" id="t01agentComMap">
<select id="findBy" resultType="t01agentComMap">

Like here, I returned the resultmap, but wrote the resulttype

Similarly, for example, if I return a string type, but I write a resultmap, I will also report an error

3. Not writing the full class name

<resultMap type="com.newtouch.business.module.dto.T01agentComDTO" id="t01agentComMap">

The resultmap, if I write it like this

<resultMap type="T01agentComDTO" id="t01agentComMap">

An error will be reported. Of course, if relevant settings are configured

[Solved] IDEA Debug Error: JDWP No transports initialized, jvmtiError=AGENT_ERROR_TRANSPORT_LOAD(196)

IDEA Error:

ERROR: transport library not found: dt_socket
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_LOAD(509)
JDWP exit error AGENT_ERROR_TRANSPORT_LOAD(196): No transports initialized [debugInit.c:750]
FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=AGENT_ERROR_TRANSPORT_LOAD(196)


Reason: IDEA’s jre configuration is inconsistent with the Project Structure configuration, resulting in the failure to start javaw
Solution:


[Solved] Error: (4, 52) Java: package org springframework. beans. factory. Annotation does not exist

Idea version: 2020, JDK version: 11

Use Maven to import other springboot modules, modify the JDK and compiler of the module to 11, and run with an error:

(original JDK version of this module: 1.8, spring boot starter parent version 2.5.0 in POM file)

Solution:

Modify the version of spring boot starter parent in POM file to 2.6.7 (or other suitable version) and run successfully.

Possible causes of error:

Version mismatch……

[Solved] org.apache.ibatis.exceptions.PersistenceException: ### Error building SqlSession…

Error Messages:

org.apache.ibatis.exceptions.PersistenceException: ### Error building SqlSession. ### The error may exist in com/zcat/mybatis/mapper/UserMapper.xml ### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.

 

Note that: The typeAliases in mybatis-config.xml are
is the package name of the entity class
mappers is the package name of the mapping file, so you need to check it carefully.

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <properties resource="jdbc.properties"></properties>
    <typeAliases>
        <package name="com.zcat.mybatis.pojo"/>
    </typeAliases>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <package name="com.zcat.mybatis.mapper"/>
    </mappers>
</configuration>

Check the creation of the mapping file. It is different from creating the package. Instead of clicking
, it is/XX/XX

Open in terminal check whether the directory structure generated during creation is correct


[Solved] SSM startup error: ClassNotFoundException: java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

SSM Startup Error: ClassNotFoundException

Phenomenon

Error message after adding jar package again:
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

 

Solution:

Select Project Structure in the file and then select Artifacts, right click on the rightmost project name and select Put into Output Root

[Solved] IDEA springboot Startup Error: java.lang.UnsatisfiedLinkError: no tcnative-1 in java.library.path

IDEA springboot startup error:

java.lang.UnsatisfiedLinkError: no tcnative-1 in java.library.path: [D:\Java\bin, C:\Windows\Sun\Java\bin, C:\Windows\system32, C:\Windows, C:\Program Files\Common Files\Oracle\Java\javapath, C:\Windows\system32, C:\Windows, C:\Windows\System32\Wbem, C:\Windows\System32\WindowsPowerShell\v1.0\, C:\Windows\System32\OpenSSH\, D:\java\bin, ;D:\tomcat\apache-tomcat-10.0.14\bin;D:\tomcat\apache-tomcat-10.0.14\lib, D:\apache-maven-3.8.4\bin, D:\Xshell\, D:\5.1, D:\5.1\clibs, C:\Users\cqb\AppData\Local\Microsoft\WindowsApps, ., .]
    at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2660) ~[na:na]
    at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:827) ~[na:na]
    at java.base/java.lang.System.loadLibrary(System.java:1871) ~[na:na]
    at org.apache.tomcat.jni.Library.<init>(Library.java:69) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.jni.Library.initialize(Library.java:206) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.AprLifecycleListener.init(AprLifecycleListener.java:193) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.AprLifecycleListener.isAprAvailable(AprLifecycleListener.java:102) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getDefaultLifecycleListeners(TomcatServletWebServerFactory.java:173) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.<init>(TomcatServletWebServerFactory.java:120) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryConfiguration$EmbeddedTomcat.tomcatServletWebServerFactory(ServletWebServerFactoryConfiguration.java:76) ~[spring-boot-autoconfigure-2.5.1.jar:2.5.1]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getWebServerFactory(ServletWebServerApplicationContext.java:217) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:160) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577) ~[spring-context-5.3.8.jar:5.3.8]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) ~[spring-boot-2.5.1.jar:2.5.1]
    at cn.com.buba.SpringbootDemoApplication.main(SpringbootDemoApplication.java:10) ~[classes/:na]
2022-05-03 14:45:28.909  INFO 6716 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2022-05-03 14:45:28.916  INFO 6716 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-05-03 14:45:28.916  INFO 6716 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.46]
2022-05-03 14:45:28.973  INFO 6716 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2022-05-03 14:45:28.973  INFO 6716 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 575 ms
2022-05-03 14:45:29.193  INFO 6716 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2022-05-03 14:45:29.200  INFO 6716 --- [           main] cn.com.buba.SpringbootDemoApplication    : Started SpringbootDemoApplication in 1.1 seconds (JVM running for 1.953)

 

Solution:


-Djava.library.path=/usr/local/java/lib:/usr/local/hadoop/lib

[Solved] Error: A JNI error has occurred, please check your installation and try again Exception in thread

Problem description

When running code. The following error is reported:

"D:\Program Files\Java\jdk1.8.0_301\bin\java.exe" -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:54797,suspend=y,server=n -javaagent:C:\Users\Administrator\AppData\Local\JetBrains\IntelliJIdea2020.3\captureAgent\debugger-agent.jar -Dfile.encoding=UTF-8 -classpath "D:\program files\Java\jdk1.8.0_301\jre\lib\charsets.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\deploy.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\access-bridge-64.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\cldrdata.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\dnsns.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\jaccess.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\jfxrt.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\localedata.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\nashorn.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\sunec.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\sunjce_provider.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\sunmscapi.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\sunpkcs11.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\ext\zipfs.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\javaws.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\jce.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\jfr.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\jfxswt.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\jsse.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\management-agent.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\plugin.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\resources.jar;D:\program files\Java\jdk1.8.0_301\jre\lib\rt.jar;E:\JetBrains\spring学习\spring-study\spring-study-01-ioc1\target\test-classes;E:\JetBrains\spring学习\spring-study\spring-study-01-ioc1\target\classes;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\springframework\spring-webmvc\5.3.10\spring-webmvc-5.3.10.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\springframework\spring-aop\5.3.10\spring-aop-5.3.10.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\springframework\spring-beans\5.3.10\spring-beans-5.3.10.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\springframework\spring-context\5.3.10\spring-context-5.3.10.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\springframework\spring-core\5.3.10\spring-core-5.3.10.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\springframework\spring-jcl\5.3.10\spring-jcl-5.3.10.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\springframework\spring-expression\5.3.10\spring-expression-5.3.10.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\springframework\spring-web\5.3.10\spring-web-5.3.10.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\junit\junit\4.13\junit-4.13.jar;D:\java\maven-3.8.1-bin\apache-maven-3.8.1\maven_repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;D:\program files\JetBrains\IntelliJ IDEA 2020.3.4\lib\idea_rt.jar" java.MyTest01
Connected to the target VM, address: '127.0.0.1:54797', transport: 'socket'
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.SecurityException: Prohibited package name: java
	at java.lang.ClassLoader.preDefineClass(ClassLoader.java:655)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:754)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)
Disconnected from the target VM, address: '127.0.0.1:54797', transport: 'socket'

Process finished with exit code 1

Cause analysis:

Through the analysis of the error, I learned that I wrote that the use of java package’s name is prohibited in Java

Solution:

Delete and modify the name of java package to other

[Solved] Syntax Error: Error: Node Sass does not yet support your current environment: Windows 64-bit with

Syntax error: error: node sass does not yet support your current environment: Windows 64 bit with unsupported runtime (93)

Detailed error reporting is shown in the figure:

reason:

Node-sass does not support high versions of node.
my version is 16.14.2

and the node-sass version supports as shown in the figure:

windows only supports 14 versions at most.

Solution:

    1. reinstall node version 14.
    2. Use NVM for node version management and change the node version to 14.

effect

As shown in the figure, after changing to version 14.19.1, it starts normally