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标题: CentOS8_Tomcat8+JDK1.8+MySQL [打印本页]
作者: admin    时间: 2020-8-3 18:46     标题: CentOS8_Tomcat8+JDK1.8+MySQL

主机信息： [root@redhat8 ~]# cat /etc/redhat-release CentOS Linux release 8.2.2004 (Core) [root@redhat8 ~]# uname -r 4.18.0-193.el8.x86_64 [root@redhat8 ~]# ip addr 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens160: mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 00:0c:29:15:ba:0c brd ff:ff:ff:ff:ff:ff inet 192.168.168.155/24 brd 192.168.168.255 scope global noprefixroute ens160 valid_lft forever preferred_lft forever inet6 fe80::92ab:5fb4:5373:ad53/64 scope link noprefixroute valid_lft forever preferred_lft forever 关闭SELinux: setenforce 0 sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config 先卸载系统自带的JDK： yum -y remove java* 安装JDK： tar -zxvf jdk-8u92-linux-x64.gz mv -f jdk1.8.0_92/ /usr/local/jdk 配置JDK的环境变量： [root@redhat8 ~]# vi /etc/profile 追加： JAVA_HOME=/usr/local/jdk JAVA_BIN=/usr/local/jdk/bin JRE_HOME=/usr/local/jdk/jre PATH=$PATH:/usr/local/jdk/bin:/usr/local/jdk/jre/bin CLASSPATH=/usr/local/jdk/jre/lib:/usr/local/jdk/lib:/usr/local/jdk/jre/lib/charsets.jar 使环境变量生效： [root@redhat8 ~]# source /etc/profile 测试JDK： [root@redhat8 ~]# java -version java version "1.8.0_92" Java(TM) SE Runtime Environment (build 1.8.0_92-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode) ## 安装Tomcat tar -zxvf apache-tomcat-8.5.23.tar.gz -C /usr/local/ mv /usr/local/apache-tomcat-8.5.23/ /usr/local/tomcat 运行Tomcat： /usr/local/tomcat/bin/startup.sh 图片1.png 关闭Tomcat： /usr/local/tomcat/bin/shutdown.sh 图片2.png 在系统启动的时候，自动启动Tomcat： echo 'export JAVA_HOME=/usr/local/jdk' >> /etc/rc.local echo '/usr/local/tomcat/bin/startup.sh' >> /etc/rc.local [root@redhat8 ~]# chmod a+x /etc/rc.d/rc.local 检测Tomcat有没有在运行的方法： [root@redhat8 ~]# yum -y install net-tools netstat -anp |grep 8080 netstat -anp |grep java echo $? 注释：返回值为0时，才代表在运行。 图片3.png 插入防火墙规则：（ 打开 TCP 8080端口 ） firewall-cmd --zone=public --add-port=8080/tcp --permanent 使规则生效： firewall-cmd --reload ###### 默认站点的默认首页文件： [root@redhat8 ~]# find / -name "index.jsp" /usr/local/tomcat/webapps/ROOT/index.jsp /usr/local/tomcat/webapps/examples/jsp/async/index.jsp /usr/local/tomcat/webapps/examples/jsp/security/protected/index.jsp /usr/local/tomcat/webapps/host-manager/index.jsp /usr/local/tomcat/webapps/manager/index.jsp 运行Tomcat后，Windows客户端远程测试： http://192.168.168.155:8080 图片4.png ###### Tomcat设置UTF8编码： [root@redhat8 ~]# vi /usr/local/tomcat/conf/server.xml 图片5.png 修改为：（ URIEncoding="utf-8" ） 图片6.png 重启Tomcat： /usr/local/tomcat/bin/shutdown.sh /usr/local/tomcat/bin/startup.sh 在默认站点的根目录下创建测试页： [root@redhat8 ~]# vi /usr/local/tomcat/webapps/ROOT/888.jsp 写入： <%@ page import="java.util.*"%> <%@ page import="java.sql.*"%> <%@ page contentType="text/html; charset=UTF-8" %> 中文测试页    
Welcome，你好
1.png">  #加载默认站点根目录里的图片 被加载的图片要存在： 图片7.png Window客户端远程访问的效果： http://192.168.168.155:8080/888.jsp 图片8.png ############ ############ MySQL8.0的安装可参考：CentOS8_Yum安装MySQL8.0 本地MySQL8.0创建测试库： mysql> create database zhuohua_db default charset utf8 collate utf8_unicode_ci; Query OK, 1 row affected, 2 warnings (0.01 sec) 给数据库管理员root@localhost设置密码： mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '168'; Query OK, 0 rows affected (0.01 sec) 默认情况下，JSP网页是不能连接MySQL数据库的，要做以下配置： [root@redhat8 ~]# yum -y install unzip unzip mysql-connector-java-8.0.15.zip cd mysql-connector-java-8.0.15 cp mysql-connector-java-8.0.15.jar /usr/local/tomcat/lib/ [root@redhat8 ~]# ll /usr/local/tomcat/lib/mysql-connector-java-* -rw-r--r--. 1 root root 2134905 4月 28 09:38 /usr/local/tomcat/lib/mysql-connector-java-8.0.15.jar 笺注：mysql-connector-java-8.0.15.jar可以连接MySQL5.5、MySQL5.6、MySQL8.0、MariaDB10.3 重启Tomcat： /usr/local/tomcat/bin/shutdown.sh /usr/local/tomcat/bin/startup.sh 连接本地MySQL8.0的测试代码： [root@redhat8 ~]# vi /usr/local/tomcat/webapps/ROOT/mysql.jsp 写入： 
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>   
<%@ page import="java.sql.*"%>   
<%@ page contentType="text/html; charset=UTF-8" %>   
   
   
本地MySQL8.0连接测试   
   
   
<%   
Connection con = null;   
Statement stmt = null;   
ResultSet rs = null;   
try{   
Class.forName("com.mysql.jdbc.Driver");   
String dbUrl = "jdbc:mysql://localhost:3306/zhuohua_db?useUnicode=true&characterEncoding=UTF-8";   
String dbUser = "root";   
String dbPwd = "168";   
con = DriverManager.getConnection(dbUrl,dbUser,dbPwd);   
out.print("本地MySQL8.0连接正常");  
}catch(Exception ex)   
{   
out.print("本地MySQL8.0连接失败
"+ex.toString()); 
}
%>
Windows客户端远程测试： http://192.168.168.155:8080/mysql.jsp 图片9.png ############ ############ 连接远程MySQL8.0的测试代码： [root@redhat8 ~]# vi /usr/local/tomcat/webapps/ROOT/mm.jsp 写入： 
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>   
<%@ page import="java.sql.*"%>   
<%@ page contentType="text/html; charset=UTF-8" %>   
   
   
远程MySQL8.0连接测试   
   
   
<%   
Connection con = null;   
Statement stmt = null;   
ResultSet rs = null;   
try{   
Class.forName("com.mysql.jdbc.Driver");   
String dbUrl = "jdbc:mysql://192.168.168.154:3306/data2_db?useUnicode=true&characterEncoding=UTF-8";   
String dbUser = "zhuohua";   
String dbPwd = "123";   
con = DriverManager.getConnection(dbUrl,dbUser,dbPwd);   
out.print("远程MySQL8.0连接正常");  
}catch(Exception ex)   
{   
out.print("远程MySQL8.0连接失败
"+ex.toString()); 
}
%>
############ 远程数据库服务器（192.168.168.154）创建测试库、用户：（MySQL8.0） mysql> create database data2_db default charset utf8 collate utf8_general_ci; Query OK, 1 row affected, 2 warnings (0.04 sec) mysql> create user zhuohua@'%' identified with mysql_native_password by '123'; Query OK, 0 rows affected (0.04 sec) mysql> grant all on data2_db.* to zhuohua@'%'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) 远程数据库服务器，插入防火墙规则： firewall-cmd --zone=public --add-port=3306/tcp --permanent firewall-cmd --reload Windows客户端远程测试： http://192.168.168.155:8080/mm.jsp 图片10.png ############ ############ 连接远程MySQL5.5的测试代码： [root@redhat8 ~]# vi /usr/local/tomcat/webapps/ROOT/my.jsp 写入： 
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>   
<%@ page import="java.sql.*"%>   
<%@ page contentType="text/html; charset=UTF-8" %>   
   
   
远程MySQL5.5连接测试   
   
   
<%   
Connection con = null;   
Statement stmt = null;   
ResultSet rs = null;   
try{   
Class.forName("com.mysql.jdbc.Driver");   
String dbUrl = "jdbc:mysql://192.168.168.130:3306/data3_db?useUnicode=true&characterEncoding=UTF-8";   
String dbUser = "happy";   
String dbPwd = "666";   
con = DriverManager.getConnection(dbUrl,dbUser,dbPwd);   
out.print("远程MySQL5.5连接正常");  
}catch(Exception ex)   
{   
out.print("远程MySQL5.5连接失败
"+ex.toString()); 
}
%>
############ MySQL5.5的安装可参考：LNMP一键安装包（lamp_Apache2.4用户验证+phpMyAdmin) 远程数据库服务器（192.168.168.130）创建测试库、用户：（MySQL5.5） mysql> create database data3_db default charset utf8 collate utf8_unicode_ci; Query OK, 1 row affected (0.51 sec) mysql> grant all on data3_db.* to happy@'%' identified by '666'; Query OK, 0 rows affected, 1 warning (0.40 sec) 远程数据库服务器，插入防火墙规则： iptables -I INPUT -p tcp --dport 3306 -j ACCEPT 保存防火墙规则： iptables-save > /etc/sysconfig/iptables Windows客户端远程测试： http://192.168.168.155:8080/my.jsp 图片11.png ###################### 以防关闭系统时卡死，最好先杀死java进程，再关闭、重启服务器 [root@redhat8 ~]# ps -ef | grep java |grep -v grep root 13622 1 0 09:41 pts/0 00:00:09 /usr/local/jdk/bin/java -Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -classpath /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/usr/local/tomcat -Dcatalina.home=/usr/local/tomcat -Djava.io.tmpdir=/usr/local/tomcat/temp org.apache.catalina.startup.Bootstrap start [root@redhat8 ~]# [root@redhat8 ~]# echo $? 0 [root@redhat8 ~]# ps aux | grep java |grep -v grep root 13622 0.3 8.3 2457280 153788 pts/0 Sl 09:41 0:09 /usr/local/jdk/bin/java -Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -classpath /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/usr/local/tomcat -Dcatalina.home=/usr/local/tomcat -Djava.io.tmpdir=/usr/local/tomcat/temp org.apache.catalina.startup.Bootstrap start [root@redhat8 ~]# [root@redhat8 ~]# echo $? 0 [root@redhat8 ~]# kill -9 13622 #杀死进程号 [root@redhat8 ~]# [root@redhat8 ~]# ps -ef | grep java |grep -v grep [root@redhat8 ~]# echo $? 1 [root@redhat8 ~]# ps aux | grep java |grep -v grep [root@redhat8 ~]# echo $? 1 注释：返回值为0时，才代表在运行。 重启服务器： [root@redhat8 ~]# which init /usr/sbin/init [root@redhat8 ~]# init 6 相关文章： CentOS6_Tomcat+JDK+MySQL CentOS8_Tomcat8+JDK1.7+MySQL/MariaDB CentOS8_Tomcat9+JDK1.9+MySQL/MariaDB Windows2008R2_IIS+PHP Manger+Zend Guard Loader/OPcache

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