String url ="jdbc:mysql://localhost/test1?user=test&password=test"; 用户名密码都是正确的,我查看user表，里面的host是localhost 但是怎么我的 ...

Have you recently upgraded MySQL from a 4.0x version ? Then you should try setting your password again using the function OLD_PASSWORD ().<BR><BR>This also might be a result of an incorrect hosts file ...