我的猜测是，JAVA_HOME的当前定义中有不需要的双引号.在命令窗口中显示set JAVA_HOME的输出.它不应包含任何双引号.

My guess is current definition of JAVA_HOME has unwanted double quotes. Show output of set JAVA_HOME on command window. It should not have any double quotes.

请启动命令提示符.再次设置JAVA_HOME

Please start command prompt. Set the JAVA_HOME again

set JAVA_HOME=C:\Program Files\Java\jdk1.7.0_07