Trying to create a quick and simple solution for formatting an Integer into a formatted string with thousand separator,
class Main
{
public static void main (String[] args) throws java.lang.Exception
{
String s = (String.format("%,d", 10000000)).replace(",",".");
System.out.println(s);
}
}
The output will be, 10.000.000. (H)
Had this weird problem today, i can login to my web if i access it directly, but unable to do it if my website is on an iframe of another web. I found out that it happen because im using SSL on both of my website (on the iframe) and the iframe parent’s website.
It actually happen because when im successfully login on my iframed-website, it will gives http 302 (Moved Temporarily) to my dashboard page. But somehow the 302 location is not an HTTPS page, it will gives a regular HTTP pages instead. Which is not a problem when im accessing my web directly, but will gives problem when accessed using an iframe website.
The solution is quite simple, using nginx “proxy_redirect” will change my 302 page from HTTP into HTTPS.
proxy_redirect http:// https://;
Hope it helps 🙂
Had this very weird error, somehow it never happens before.
org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcher] in context with path [/test] threw exception [org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IndexOutOfBoundsException: Index: 1] with root cause java.lang.IndexOutOfBoundsException: Index: 1 at java.util.Collections$EmptyList.get(Collections.java:3212) at springfox.documentation.swagger2.mappers.ModelMapper.typeOfValue(ModelMapper.java:129) at springfox.documentation.swagger2.mappers.ModelMapper.mapProperties(ModelMapper.java:92) at springfox.documentation.swagger2.mappers.ModelMapper.mapModels(ModelMapper.java:67) at springfox.documentation.swagger2.mappers.ModelMapper.modelsFromApiListings(ModelMapper.java:205) at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2MapperImpl.mapDocumentation(ServiceModelToSwagger2MapperImpl.java:50) at springfox.documentation.swagger2.web.Swagger2Controller.getDocumentation(Swagger2Controller.java:82) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.__invoke(DelegatingMethodAccessorImpl.java:43) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java)
This is my pom.xml content,
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.5.0</version>
</dependency>
The solution is quite easy, upgrading into version 2.6.1 solve my problem.
Found this weird error when connecting to a HTTPS website, using apache commons httpclient.
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Very weird because i can connect to almost every other HTTPS website, but only one website causing this exception. After googling for a while, i found a very interesting solution from MKYong, that is to register the website’s certificate on my JVM.
http://www.mkyong.com/webservices/jax-ws/suncertpathbuilderexception-unable-to-find-valid-certification-path-to-requested-target/
Run this command to generate a new jssecacerts file,
c:\>java InstallCert localhost:443
The only difference is the location where i downloaded InstallCert.java, i downloaded it from this link.
https://github.com/OopsMouse/java-use-examples/blob/master/src/com/aw/ad/util/InstallCert.java
And i also removed the file’s package name, to make it easier to run.
I met a very strange error, that somehow works on Tomcat 7, but not working on Tomcat 8. I’m using ServletContext’s class getRealPath method, for getting my application’s absolute file path. Here is my code,
@PostConstruct
private void init() {
try {
// get report location
String reportLocation = servletContext.getRealPath("WEB-INF");
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
}
On this code, i’m trying to get my report’s location and then processing it, by using servletContext.getRealPath. Which works well on my Apache Tomcat 7, but not well enough on Apache Tomcat 8. Somehow it always show null instead of the absolute path of my “WEB-INF” folder.
The workaround is actually quite simple, adding slash in front of “WEB-INF” make the problem disappear.
@PostConstruct
private void init() {
try {
// get report location
String reportLocation = servletContext.getRealPath("/WEB-INF");
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
}