rpm安裝JDK方法

• 由於版權原因，Linux發行版並沒有包含官方版的Oracle JDK，必須自己從官網上下載安裝。Oracle官網用Cookie限制下載方式，使得眼下只能用瀏覽器進行下載，使用其他方式可能會導致下載失敗。但還是有方法可以在Linux進行下載的，本文以wget為例。
• 我們需要三個參數：–no-check-certificate、–no-cookies、–header，通過man wget命令可以查到。
• 用於禁止檢查證書

--no-check-certificate Don't check the server certificate against the available certificate authorities. Also don't require the URL host name to match the common name presented by the certificate. As of Wget 1.10, the default is to verify the server's certificate against the recognized certificate authorities, breaking the SSL handshake and aborting the download if the verification fails. Although this provides more secure downloads, it does break interoperability with some sites that worked with previous Wget versions, particularly those using self-signed, expired, or otherwise invalid certificates. This option forces an "insecure" mode of operation that turns the certificate verification errors into warnings and allows you to proceed. If you encounter "certificate verification" errors or ones saying that "common name doesn't match requested host name", you can use this option to bypass the verification and proceed with the download. Only use this option if you are otherwise convinced of the site's authenticity, or if you really don't care about the validity of its certificate. It is almost always a bad idea not to check the certificates when transmitting confidential or important data.

 

• 用於禁用Cookies

--no-cookies Disable the use of cookies. Cookies are a mechanism for maintaining server-side state. The server sends the client a cookie using the "Set-Cookie" header, and the client responds with the same cookie upon further requests. Since cookies allow the server owners to keep track of visitors and for sites to exchange this information, some consider them a breach of privacy. The default is to use cookies; however, storing cookies is not on by default.

• 用於定義請求頭信息

--header=header-line Send header-line along with the rest of the headers in each HTTP request. The supplied header is sent as-is, which means it must contain name and value separated by colon, and must not contain newlines. You may define more than one additional header by specifying --header more than once. wget --header='Accept-Charset: iso-8859-2' \ --header='Accept-Language: hr' \ http://fly.srk.fer.hr/ Specification of an empty string as the header value will clear all previous user-defined headers. As of Wget 1.10, this option can be used to override headers otherwise generated automatically. This example instructs Wget to connect to localhost, but to specify foo.bar in the "Host" header: wget --header="Host: foo.bar" http://localhost/ In versions of Wget prior to 1.10 such use of --header caused sending of duplicate headers.

• 接下來我們就可以用wget命令愉快的下載JDK了

  1. 首先我們要找到要下載JDK的URL地址，例如：http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm。這個地址可以去Orcale的官網找到。

  2. 通過wget命令下載：

     wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm

  3. JDK我一般放在/usr/java目錄下，現在我們把下載的rpm文件挪過去：

     //創建目錄 mkdir /usr/java //把下載的rpm文件copy過去 cp jdk-8u131-linux-x64.rpm /usr/java/

  4. 添加執行權限:

     //進入目錄 mkdir cd /usr/java //添加可執行權限 chmod +x jdk-8u101-linux-x64.rpm

  5. 執行rpm命令安裝:

     //安裝rpm軟件包 rpm -ivh jdk-8u101-linux-x64.rpm

  6. 查看是否安裝成功：

     //查看java的版本信息 java -version

• 能夠顯示出版本信息就說明安裝成功了。 
  java version “1.8.0_131” 
  Java(TM) SE Runtime Environment (build 1.8.0_131-b11) 
  Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

  借鑒：http://www.omgdba.com/download-oracle-jdk-from-official-website-using-wget-on-linux.html?utm_source=tuicool&utm_medium=referral