peter tong

Tim Holloway wrote:

peter tong wrote:

Himai Minh wrote:First of all, have you tried @Autowired instead of @Inject?
Secondly, do you have @ComponentScan (basePackages = "....") //where basePackage is the name of the base package such as "com.example" ?

Oh, yes, after change to @Autowired, apple1 can be injected

But why @Inject cannot?
My classpath has javaee-web-api-8.0-sources.jar.

Because @Inject is a CDI annotation, not a Spring annotation.

@Autowired tells Spring to consult its BeanFactory, construct the bean to be injected (if it's not already existing) and set the property value to reference that bean. @Inject references the CDI container, not Spring.

"@Inject references the CDI container, not Spring.", yes, I try to use @Inject and test in wildfly server, then even @Inject can do what I want.

Himai Minh wrote:First of all, have you tried @Autowired instead of @Inject?
Secondly, do you have @ComponentScan (basePackages = "....") //where basePackage is the name of the base package such as "com.example" ?

Oh, yes, after change to @Autowired, apple1 can be injected

But why @Inject cannot?
My classpath has javaee-web-api-8.0-sources.jar.

I have no used @SpringBootApplication annotation, in fact I am new in spring, I expect Spring container will create and manage the TestController class as it has @Controller annotation and will instantiate, inject its member field.
I have checked my application pom, it has not use spring boot. the pom is as follow:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>MySpringMvc</groupId> <artifactId>MySpringMvc</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name>MySpringMvc</name> <url>http://maven.apache.org</url> <properties> <java.version>1.8</java.version> <spring.version>5.2.3.RELEASE</spring.version> </properties> <dependencies> <!-- Spring core & mvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <type>jar</type> <scope>test</scope> </dependency> <!-- Servlet Spec --> <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>            <scope>provided</scope>        </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.1</version> <scope>provided</scope> </dependency> </dependencies> <repositories> <repository> <id>springsource-milestones</id> <name>SpringSource Milestones Proxy</name> <url>https://oss.sonatype.org/content/repositories/springsource-milestones</url> </repository> </repositories> <build> <finalName>MySpringMvc</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.0.2</version> <configuration> <source>${java.version}</source> <target>${java.version}</target> </configuration> </plugin> </plugins> </build> </project>

Is this related?

when enter url http://localhost:8080/MySpringMvc/home/test1, I expect apple1 will be injected but not, its value is null, why?

@Configuration public class MvcConfiguration  implements WebMvcConfigurer{ @Bean public Apple apple() throws Exception {return new Apple();}        //.......


@RestController @RequestMapping("/home") public class TestController{ @Inject Apple apple1; public TestController() { System.out.println("TestController constructor"); } @RequestMapping(value="/test1") public ModelAndView test(HttpServletResponse response) throws IOException{ System.out.println(apple1==null?"null":apple1.getA());  // return "null"  <-- return new ModelAndView("test1"); } }

public class Apple { String a = "see apple?"; public String getA() { return a; } public void setA(String a) { this.a = a; } }

Oh yes, in \.metadata\.plugins\org.eclipse.wst.server.core\tmp0\conf\server.xml, I found something

<Resource auth="Container" driverClassName="oracle.jdbc.driver.OracleDriver"......validationQuery="SELECT SYSDATE FROM DUAL"/>  

I have deleted and added the server in tomcat many times, but don't know why this settings is still in tmp0\conf\server.xml

but I have no application deployed, it is a fresh tomcat..., so don't know why it try to connect oracle for what application?

the tomcat is freshly installed and no any web project on it, I can succesfully start up by using apache-tomcat-9.0.41\bin\startup.bat, but if I start up inside eclipse, many error show in console as follow: why?

Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Server version name:   Apache Tomcat/9.0.34 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Server built:          Apr 3 2020 12:02:52 UTC Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Server version number: 9.0.34.0 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: OS Name:               Windows 10 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: OS Version:            10.0 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Architecture:          amd64 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Java Home:             C:\Program Files\Java\jdk-11.0.7 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: JVM Version:           11.0.7+8-LTS Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: JVM Vendor:            Oracle Corporation Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: CATALINA_BASE:         C:\Kei\CFMS_Workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: CATALINA_HOME:         C:\apache-tomcat-9.0.34 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Dcatalina.base=C:\Kei\CFMS_Workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Dcatalina.home=C:\apache-tomcat-9.0.34 Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Dwtp.deploy=C:\Kei\CFMS_Workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps Dec 15, 2020 9:17:25 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Dfile.encoding=Cp1252 Dec 15, 2020 9:17:25 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jdk-11.0.7\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Program Files/Java/jdk-11.0.7/bin/server;C:/Program Files/Java/jdk-11.0.7/bin;C:\Python38\Scripts\;C:\Python38\;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files (x86)\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files\nodejs\;C:\ProgramData\chocolatey\bin;C:\apache-maven-3.6.3\bin;C:\Program Files\Git\cmd;C:\Users\kwokkeitong\AppData\Local\Microsoft\WindowsApps;C:\Users\kwokkeitong\AppData\Roaming\npm;C:\Microsoft VS Code\bin;;C:\Kei\eclipse\java-2020-03\eclipse;;.] Dec 15, 2020 9:17:26 PM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-nio-8080"] Dec 15, 2020 9:17:26 PM org.apache.catalina.startup.Catalina load INFO: Server initialization in [1,388] milliseconds Dec 15, 2020 9:17:26 PM org.apache.catalina.core.StandardService startInternal INFO: Starting service [Catalina] Dec 15, 2020 9:17:26 PM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet engine: [Apache Tomcat/9.0.34] Dec 15, 2020 9:18:09 PM org.apache.naming.NamingContext lookup WARNING: Unexpected exception resolving reference java.sql.SQLException: Cannot create PoolableConnectionFactory (IO Error: The Network Adapter could not establish the connection) at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:669) at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:544) at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getLogWriter(BasicDataSource.java:1077) at org.apache.tomcat.dbcp.dbcp2.BasicDataSourceFactory.createDataSource(BasicDataSourceFactory.java:561) at org.apache.tomcat.dbcp.dbcp2.BasicDataSourceFactory.getObjectInstance(BasicDataSourceFactory.java:238) at org.apache.naming.factory.FactoryBase.getObjectInstance(FactoryBase.java:96) at java.naming/javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:330) at org.apache.naming.NamingContext.lookup(NamingContext.java:857) at org.apache.naming.NamingContext.lookup(NamingContext.java:160) at org.apache.naming.NamingContext.lookup(NamingContext.java:843) at org.apache.naming.NamingContext.lookup(NamingContext.java:174) at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:1017) at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:557) at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:253) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5056) 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.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841) 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.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) 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:633) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:343) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:474) Caused by: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:801) at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:782) at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:39) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:704) at org.apache.tomcat.dbcp.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:55) at org.apache.tomcat.dbcp.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:355) at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:115) at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:665) ... 43 more Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:569) at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:521) at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:660) at oracle.net.ns.NSProtocol.connect(NSProtocol.java:287) at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1481) at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:540) ... 50 more Caused by: java.io.IOException: Connection timed out: connect, socket connect lapse 21037 ms. /10.8.0.1 1521 0 1 true at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:229) at oracle.net.nt.ConnOption.connect(ConnOption.java:172) at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:508) ... 55 more Caused by: java.net.ConnectException: Connection timed out: connect at java.base/sun.nio.ch.Net.connect0(Native Method) at java.base/sun.nio.ch.Net.connect(Net.java:482) at java.base/sun.nio.ch.Net.connect(Net.java:474) at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:694) at java.base/java.nio.channels.SocketChannel.open(SocketChannel.java:194) at oracle.net.nt.TimeoutSocketChannel.connect(TimeoutSocketChannel.java:108) at oracle.net.nt.TimeoutSocketChannel.<init>(TimeoutSocketChannel.java:86) at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:188) ... 57 more Dec 15, 2020 9:18:09 PM org.apache.catalina.core.NamingContextListener addResource WARNING: naming.jmxRegistrationFailed Dec 15, 2020 9:18:09 PM org.apache.jasper.servlet.TldScanner scanJars INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. Dec 15, 2020 9:18:10 PM org.apache.catalina.util.SessionIdGeneratorBase createSecureRandom WARNING: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [276] milliseconds. Dec 15, 2020 9:18:10 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["http-nio-8080"] Dec 15, 2020 9:18:10 PM org.apache.catalina.startup.Catalina start INFO: Server startup in [43,707] milliseconds

RAD7.5, ws server 7.0
if I modified file in my workspace and start the server, the following error is shown:

[12/5/16 16:41:01:381 CST] 00000017 wtp           W org.eclipse.jst.j2ee.commonarchivecore.internal.impl.ArchiveImpl cleanupAfterTempSave Rename failure during final save; transfer failure failure during final save;this may result in a failure to save updates to the archive, or in a corruption of the original archive.
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R org.eclipse.jst.j2ee.commonarchivecore.internal.exception.SaveFailureException: IWAE0017E Unable to replace original archive: C:\Program Files\IBM\SDP\runtimes\base_v7\profiles\AppSrv03\wstemp\wstemp\app_158ce240c1f\mrg\cwss_apps.war
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.ArchiveImpl.cleanupAfterTempSave(ArchiveImpl.java:496)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.ArchiveImpl.extractNoReopen(ArchiveImpl.java:1165)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.ArchiveImpl.extractNoReopen(ArchiveImpl.java:1024)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at com.ibm.ws.management.application.AppUpdate.createDirsInPath(AppUpdate.java:206)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at com.ibm.ws.management.application.AppUpdate.mergeFiles(AppUpdate.java:128)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at com.ibm.ws.management.application.task.FileMergeTask.updatePartialEar(FileMergeTask.java:376)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at com.ibm.ws.management.application.task.FileMergeTask.update(FileMergeTask.java:301)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at com.ibm.ws.management.application.task.FileMergeTask.performTask(FileMergeTask.java:148)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at com.ibm.ws.management.application.SchedulerImpl.run(SchedulerImpl.java:294)
[12/5/16 16:41:01:611 CST] 00000017 SystemErr     R at java.lang.Thread.run(Thread.java:767)

I already installed the latest fix patch:FP0000041

In my rad 7.5, WebSphere Application Server v7.0, when I start it, the console show:
[12/5/16 15:38:45:259 CST] 00000008 SystemOut     O startup HTTP server on http://10.171.34.21:9083/cwss/soap
[12/5/16 15:38:45:306 CST] 00000000 TCPChannel    I   TCPC0001I: TCP Channel TCP_2 is listening on host *  (IPv6) port 9081.
1) I don't know where the 9083 is defined in "startup HTTP server on http://10.171.34.21:9083/cwss/soap"?
2) also should the above two statement use the same port? now one is 9083, one is 9081.
3) if I have another application and want to call the function in this server, should I use 9081 or 9083?
attached images are the console output and the admin console port setting.

if each character takes up between 1 and 4 bytes in UTF-8, then if the field in database is defined as varchar2(100 bytes), then
pstmt.setString(1, x)?

x should be less than or equal to 25 characters? (25 * 4 bytes = 100 bytes)

my jvm flie.encoding system property is Cp1252
I see the following code (with some modification):
PreparedStatement pstmt = null; String sql = "insert into table1(field1) values(?)"; pstmt = connection.prepareStatement(sql); pstmt.setString(1, new String("中文字".getBytes(), "UTF-8"));

What is the above code
new String("中文字".getBytes(), "UTF-8")
doing exactly?

is this the same if I change System property file.encoding=UTF-8 and then
pstmt.setString(1, "中文字")?

for java split function with input string
boo:and:foo
and regex
o+

"boo:and:foo".split("o+", -1);

the result is three string
'b','':and:f'',''

why the empty string between 'oo' is not counted but the last '' is counted?
the last '' is come from the end of the whole string (:foo)?
what is the exact meaning of the '+'  in the regex 'o+'?

then I try
testStringFunction.testSplit("", "\\|", 0); private void testSplit(String input, String regexDelimiter, int limit){ System.out.println("input string = \"" + input + "\""); // you see, in output, java consume the first "\", and input becomes "\|" int splitLen = input.split(regexDelimiter, limit).length; System.out.println("input.split(\"" + regexDelimiter + "\", " + limit + ").length = " + splitLen); String[] str1Arr = input.split(regexDelimiter, limit); for (int i=0; i<str1Arr.length; i++){ System.out.println("str[" + i + "]=" + str1Arr[i]); } System.out.println("end"); }

the "|" is never occur in the empty input string, but it also return length = 1, why again?

input string = ""
input.split("\|", 0).length = 1
str[0]=
end

sorry that I am not very clear about String.split() function.

>

Great, thaks for the help

I still find some problem about String.split function as following example

public static void main(String args[]){ TestStringFunction testStringFunction = new TestStringFunction(); //testStringFunction.testSplit("abbcxbbbbx", "b"); testStringFunction.testSplit("06265680,8800.00|00496455,5076.72|", "|"); } private void testSplit(String input, String regexDelimiter){ System.out.println("input string = \"" + input + "\""); int splitLen = input.split(regexDelimiter, -1).length; System.out.println("input.split(\"" + regexDelimiter + "\", -1).length = " + splitLen); String[] str1Arr = input.split(regexDelimiter, -1); for (int i=0; i<str1Arr.length; i++){ System.out.println("str[" + i + "]=" + str1Arr[i]); } System.out.println("end"); }

I expect it return 3 as str[0]='06265680,8800.00', str[1]='00496455,5076.72', str[2]='', but in fact it returns

input string = "06265680,8800.00|00496455,5076.72|"
input.split("|", -1).length = 36
str[0]=
str[1]=0
str[2]=6
str[3]=2
str[4]=6
str[5]=5
str[6]=6
str[7]=8
str[8]=0
str[9]=,
str[10]=8
str[11]=8
str[12]=0
str[13]=0
str[14]=.
str[15]=0
str[16]=0
str[17]=|
str[18]=0
str[19]=0
str[20]=4
str[21]=9
str[22]=6
str[23]=4
str[24]=5
str[25]=5
str[26]=,
str[27]=5
str[28]=0
str[29]=7
str[30]=6
str[31]=.
str[32]=7
str[33]=2
str[34]=|
str[35]=
end

why it breakdown each character??

If I want it to return str[0]='06265680,8800.00', str[1]='00496455,5076.72', str[2]='', how should I modify the program?>