Postgres Schema
Simple tutorial to show some command that let you operate with your postgreSQL and schema.
Mingch is a software engineer who helps startups on software development. My expertise offer in mobile development, web development projects, as well as private consultations.
Namecheap, Cloudflare, Amazon EC2
This article was talking about how to associate your domain to cloudflare with your amazon EC2 instance.
Upload file to S3 with Spring
This article I’ll show you how to create program with spring and upload file to amazon S3.
Not able delete elastickbeanstalk empty S3 buckets
Recently I’ve encounter a problem that doesn’t allow me to delete the s3 buckets with the reason access denied. Edit the delete operation policy from Deny to Allow doesn’t work for me. I’ve found the following solution work for me.
Troubleshooting spring resource handlers
If you have configure the spring resource handlers but didn’t display correctly on the browser, try check the following configuration.
Spring Security
This tutorial are talking about spring security base on servlet 3.1 with java-based configuration.
Spring i18N
Register Local Resolver Spring will look for user register localResolver, if not found, spring will use configure AcceptHeaderLocaleResolver as default. AcceptHeaderLocaleResolver HTTP Request header contains information with key accept-language. This information will send by user browser. SessionLocaleResolver SessionLocaleResolver associate
ExceptionHandler
User Define Exception We need to define the exception that to be handle by our own. For instance, a product search page. When user key in a bad word to search, we’d like to show error page. public class BadKeywordsException
Spring Upload File
Commons FileUpload multipart request process XML-based Java-based XML-based web.xml <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/mvc-config.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> mvc-config.xml <bean id=”multipartResolver” class=”org.springframework.web.multipart.commons.CommonsMultipartResolver”> <property name=”uploadTempDir” value=”/tmp”></property> <property name=”maxUploadSize” value=”1048576″></property> <property name=”maxInMemorySize” value=”524288″></property> </bean> Java-based WebInitializer public class
Spring Tag, JSP Form Reference
Define Namespace and Taglib <!DOCTYPE html> <%@ page language=”java” contentType=”text/html; charset=UTF-8″ pageEncoding=”UTF-8″%> <%@ taglib uri=”http://www.springframework.org/tags” prefix=”spring” %> <%@ taglib uri=”http://www.springframework.org/tags/form” prefix=”form” %> <%@ taglib uri=”http://java.sun.com/jsp/jstl/core” prefix=”c” %> Define Form and Object binding <form:form modelAttribute=”user” action=”/your-url-action” method=”post”> <!– continue read