doc: change readme doc

README-CN.md

@@ -56,20 +56,6 @@ TDengine 目前 2.0 版服务器仅能在 Linux 系统上安装和运行，后
 sudo apt-get install -y gcc cmake build-essential git libssl-dev
 ```
 
-编译或打包 JDBC 驱动源码，需安装 Java JDK 8 或以上版本和 Apache Maven 2.7 或以上版本。
-
-安装 OpenJDK 8：
-
-```bash
-sudo apt-get install -y openjdk-8-jdk
-```
-
-安装 Apache Maven：
-
-```bash
-sudo apt-get install -y  maven
-```
-
 #### 为 taos-tools 安装编译需要的软件
 
 taosTools 是用于 TDengine 的辅助工具软件集合。目前它包含 taosBenchmark（曾命名为 taosdemo）和 taosdump 两个软件。
@@ -85,19 +71,10 @@ sudo apt install build-essential libjansson-dev libsnappy-dev liblzma-dev libz-d
 ### CentOS 7.9：
 
 ```bash
-sudo yum install -y gcc gcc-c++ make cmake git openssl-devel
-```
-
-安装 OpenJDK 8：
-
-```bash
-sudo yum install -y java-1.8.0-openjdk
-```
-
-安装 Apache Maven：
-
-```bash
-sudo yum install -y maven
+sudo yum install epel-release
+sudo yum update
+sudo yum install -y gcc gcc-c++ make cmake3 git openssl-devel
+sudo ln -sf /usr/bin/cmake3 /usr/bin/cmake
 ```
 
 ### CentOS 8 & Fedora
@@ -106,18 +83,6 @@ sudo yum install -y maven
 sudo dnf install -y gcc gcc-c++ make cmake epel-release git openssl-devel
 ```
 
-安装 OpenJDK 8：
-
-```bash
-sudo dnf install -y java-1.8.0-openjdk
-```
-
-安装 Apache Maven：
-
-```bash
-sudo dnf install -y maven
-```
-
 #### 在 CentOS 上构建 taosTools 安装依赖软件
 
 为了在 CentOS 上构建 [taosTools](https://github.com/taosdata/taos-tools) 需要安装如下依赖软件

README.md

@@ -59,20 +59,6 @@ To build TDengine, use [CMake](https://cmake.org/) 3.0.2 or higher versions in t
 sudo apt-get install -y gcc cmake build-essential git libssl-dev
 ```
 
-To compile and package the JDBC driver source code, you should have a Java jdk-8 or higher and Apache Maven 2.7 or higher installed.
-
-To install openjdk-8:
-
-```bash
-sudo apt-get install -y openjdk-8-jdk
-```
-
-To install Apache Maven:
-
-```bash
-sudo apt-get install -y maven
-```
-
 #### Install build dependencies for taosTools
 
 We provide a few useful tools such as taosBenchmark (was named taosdemo) and taosdump. They were part of TDengine. From TDengine 2.4.0.0, taosBenchmark and taosdump were not released together with TDengine.
@@ -93,36 +79,12 @@ sudo yum install -y gcc gcc-c++ make cmake3 git openssl-devel
 sudo ln -sf /usr/bin/cmake3 /usr/bin/cmake
 ```
 
-To install openjdk-8:
-
-```bash
-sudo yum install -y java-1.8.0-openjdk
-```
-
-To install Apache Maven:
-
-```bash
-sudo yum install -y maven
-```
-
 ### CentOS 8 & Fedora
 
 ```bash
 sudo dnf install -y gcc gcc-c++ make cmake epel-release git openssl-devel
 ```
 
-To install openjdk-8:
-
-```bash
-sudo dnf install -y java-1.8.0-openjdk
-```
-
-To install Apache Maven:
-
-```bash
-sudo dnf install -y maven
-```
-
 #### Install build dependencies for taosTools on CentOS
 
 To build the [taosTools](https://github.com/taosdata/taos-tools) on CentOS, the following packages need to be installed.