因为 jdk 是1.8的版本，和 dubbo-admin 存在兼容性问题。所以报错：
Bean property 'URIType' is not writable or has an invalid；
解决方法，修改 tomcat 默认的 jdk到 1.7 :
1) 修改bin文件夹下面的catalina.bat文件，把如下内容
rem ----- Execute The Requested Command ----------------------------------
echo Using CATALINA_BASE: %CATALINA_BASE%
echo Using CATALINA_HOME: %CATALINA_HOME%
echo Using CATALINA_TMPDIR: %CATALINA_TMPDIR%
echo Using JAVA_HOME: %JAVA_HOME%
修改为：
echo Using CATALINA_BASE: %CATALINA_BASE%
echo Using CATALINA_HOME: %CATALINA_HOME%
echo Using CATALINA_TMPDIR: %CATALINA_TMPDIR%
echo Using JAVA_HOME:D:\Java\jdk1.7.0_80
2) 修改bin文件夹下面的setclasspath.bat文件，把如下内容：
rem Set standard command for invoking Java.
rem Note that NT requires a window name argument when using start.
rem Also note the quoting as JAVA_HOME may contain spaces.
set _RUNJAVA="%JAVA_HOME%\bin\java"
set _RUNJAVAW="%JAVA_HOME%\bin\javaw"
set _RUNJDB="%JAVA_HOME%\bin\jdb"
set _RUNJAVAC="%JAVA_HOME%\bin\javac"
修改为:
rem Set standard command for invoking Java.
rem Note that NT requires a window name argument when using start.
rem Also note the quoting as JAVA_HOME may contain spaces.
set _RUNJAVA="D:\Java\jdk1.7.0_80\bin\java.exe"
set _RUNJDB="D:\Java\jdk1.7.0_80\bin\jdb.exe"
然后在使用 startup.bat 启动成功。