![]() In this tutorial, we are going to see 7 different examples to read File to a byte array, some by using third party libraries, and others by using JDK 6 and JDK 7 core Java libs.ĭepending upon your choice, you can use any of the following methods to convert file data into bytes. If you are a fan of Apache commons and Google Guava like me, then you may already familiar with one-liner code, which can quickly read a file into a byte array if not, then this is the right time to explore those API. Anyway, no need to worry as there are several other ways to read File into a byte array and you will learn those in this Java file tutorial. It only holds path and allows you to perform certain operations like opening and closing file, but doesn’t allow you to directly convert File to a byte array. Unfortunately, Java’s File class, which is used to represent both files and directories, doesn’t have a method say toByteArray(). One example is to convert the contents of a file into String for display. Resource instances.Hello guys, Java programmers often face scenarios in real-world programming, where they need to load data from a file into a byte array, it could be text or binary file. To be implemented by objects that can return (i.e. URL string, and will create a UrlResource. Path string contains a few well-known (to it, that is) prefixes such asĬlasspath:, it will create an appropriate specializedĭoesn't recognize the prefix, it will assume the this is just a standard Will often be created implicitly when you call an API method which takesĪ String argument which is meant to represent a Http: for accessing resources via the HTTP protocol,įtp: for accessing resources via FTP, etc.Įxplicitly using the UrlResource constructor, but This includes file: for accessing filesystem paths, Standardized prefixes are used to indicate one URL type from another. String representation, such that appropriate Object that is normally accessible via a URL, such as files, an HTTP UrlResource wraps a URL, and uses the wrapped Replacement for URL, and can be consideredĮquivalent to any other library you would use for this purpose.įunctionality: it wraps it where possible. Small set of utility classes, which are serving as a more capable Java get file path of resource code#While this couples your code to Spring, it really only couples it to this General utility class by itself in your own code, for access to resources,Įven when your code doesn't know or care about any other parts of Spring. String path, allow the caller to specify that aĪ lot with Spring and by Spring, it's actually very useful to use as a String which in unadorned or simple form is used toĬontext implementation, or via special prefixes on the Other methods in some Spring APIsĪpplicationContext implementations), take a Representing the resource (if the underlying implementation is compatible,Įxtensively in Spring itself, as an argument type in many method Other methods allow you to obtain an actual This is often the fully qualified file name or the actual Willīe false for all usual resource implementations,įor this resource, to be used for error output when working with the Must be read once only and then closed to avoid resource leaks. InputStream cannot be read multiple times, and It is the responsibility ofīoolean indicating whether this resource actuallyīoolean indicating whether this resource representsĪ handle with an open stream. It is expected that each invocation returns aįresh InputStream. Resource, returning an InputStream for readingįrom the resource. ![]()
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