编译:

javac  -cp ".;./mysql-connector-java-5.0.8.jar;mybatis-3.0.1.jar;ibatis-2.3.0.677.jar" MainStart.java

为运行:

java  -cp ".;./mysql-connector-java-5.0.8.jar;mybatis-3.0.1.jar;ibatis-2.3.0.677.jar" MainStart

另一种通过单击/双击运行jar文件的方法是在 文件的名字。例如，您可以将文件MyJar.jar重命名为-jar MyJar.jar。

当然，您必须拥有与java.exe相关联的.class文件。这可能不是在所有情况下都有效，但对我来说大多数时候都有效。

最简单的方法可能是升级或重新安装Java运行时环境(JRE)。

或:

Open the Windows Explorer, from the Tools select 'Folder Options...' Click the File Types tab, scroll down and select JAR File type. Press the Advanced button. In the Edit File Type dialog box, select open in Actions box and click Edit... Press the Browse button and navigate to the location the Java interpreter javaw.exe. In the Application used to perform action field, needs to display something similar to C:\Program Files\Java\j2re1.4.2_04\bin\javaw.exe" -jar "%1" % (Note: the part starting with 'javaw' must be exactly like that; the other part of the path name can vary depending on which version of Java you're using) then press the OK buttons until all the dialogs are closed.

这是从这里偷来的:http://windowstipoftheday.blogspot.com/2005/10/setting-jar-file-association.html

我正在运行Windows 7 x64，无法使用任何这些修复程序。

这条对我来说还是有用的:

http://thepanz.netsons.org/post/windows7-jar-file-association-broken-with-nokia-ovi

你可以下载一个包含要运行的.bat文件的存档文件，但请检查实际的javaw.exe!!!!的路径

编译:

javac  -cp ".;./mysql-connector-java-5.0.8.jar;mybatis-3.0.1.jar;ibatis-2.3.0.677.jar" MainStart.java

为运行:

java  -cp ".;./mysql-connector-java-5.0.8.jar;mybatis-3.0.1.jar;ibatis-2.3.0.677.jar" MainStart

步骤:

1.)在谷歌上搜索“Java SE Runtime Environment”:https://www.google.com/search?q=Java+SE+Runtime+Environment

2.)在你的电脑上安装合适的版本