什么是Ant（What is Ant）.doc

什么是Ant（What is Ant） Ant is a Java based build tool. In theory, it is somewhat similar to the make in C (Unix), but there is no make flaw. Why do we need a new build tool since we already have make, gnumake, nmake, jam, and other build tools? Because Ants authors developed software on a variety of (hardware) platforms, they were unable to tolerate the limitations and inconveniences of these tools. Tools like make are essentially shell - based: they calculate dependencies and then execute commands that are not very different from the commands you command at the command line. This means that you can easily extend the tool by using OS specific or writing new (command) programs; however, this also means that you restrict yourself to a specific OS, Or on a particular OS type, such as Unix. Makefile is also hateful. Anyone who has used them has had a nasty tab problem. The original author of Ant often asks himself, does my command not execute because there is a space in front of my tab?!!. Tools like jam deal with this kind of problem very well, However, users must remember and use a new format. Ant is different. Unlike the extension model based on the shell command, Ant extends with the class of Java. The user does not have to write the shell command, and the configuration file is based on XML, You can execute various task by calling the target tree. Each task is run by implementing an object that implements a particular Task interface. If you dont have any idea about Ant, May not understand this section, it does not matter, and later on target, task will do a detailed introduction. If you dont have much time, you can even skip this section, and then come back to browse here Introduce, then you will understand. Similarly, if youre not familiar with tools such as make, it doesnt matter, and the following description doesnt use the concepts in make at all It must be admitted that in doing so, some unique expressive power is lost when constructing the shell command. Such as