1.查询已经安装的jdk
rpm -qa | grep jdk
2.卸载jdk
rpm -e --nodeps jdk-1.6.0_45-fcs.x86_64
3.安装jdk (jdk-6u45-linux-x64-rpm.bin)
在/usr中创建java目录,将jdk-6u45-linux-x64-rpm.bin拷贝到此目录下
赋权限
chmod -R 777 jdk-6u45-linux-x64-rpm.bin
./jdk-6u45-linux-x64-rpm.bin
rpm -ivh jdk-6u45-linux-x64-rpm