org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user ''@'localhost' (using password: YES))
................
Caused by: java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)
.................
然后这是我的连接池配置
<?xml version="1.0" encoding="UTF-8"?>
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource> <!-- 监听资源 -->
<Resource
name="jdbc/dataexam"
auto="Container"
type="javax.sql.DataSource"
driverClassName="org.gjt.mm.mysql.Driver"
url="jdbc:mysql://localhost:3306/dataexam"
usename="root"
password="962432174"
MaxActive="5000"
maxIdle="10"
maxWait="-1"
></Resource>
</Context>
然后是测试代码
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="javax.naming.Context" %>
<%@ page import="javax.sql.DataSource" %>
<%@ page import="javax.naming.InitialContext" %>
<%@ page import="java.sql.*" %>
<%@ page import="myclass.dal.*" %>
<%@ page import="myclass.bol.*" %>
<%@ page import="java.util.ArrayList" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
1234
<%DBAcess dba = new DBAcess();
examineeDal examd=new examineeDal();
ArrayList<examinee> list =new ArrayList<examinee>();
try{
int rsult=
examd.CreateExaminee("123635673879","黄呵呵","女","江西师范大学","江西南昌","17379245533","kind@163.com","123456","中级","");
out.print(rsult);
dba.getConnection();
if(dba.getConn()!=null){
out.println("已经获得DataSourece");
out.println("<br>");
String str="select * from examinee";
ResultSet rst = dba.query(str);
out.println("一下是读取的数据<br>");
while(rst.next()){
out.println("<br>");
out.println(rst.getString(1));
}
out.println("系统时间："+DBAcess.getSysDate());
examinee exambean = null;
exambean=examd.getExamineeByID("123635673879");
out.println("<br><br>"+exambean.getExamID());
list=examd.getExamineeAll();
for(examinee e:list){
out.println("<br>这个是死通过ArrayList得到的值："+e.getExamID());
}
}
}catch(Exception ne){
out.println("出现如下错误：<br>");
out.println(ne);
}finally{
dba.closeConnection();
out.println("<br>已关闭DataSource!");
}
%>
</body>
</html>
运行结果无法返回数据库的数据，也就意味无法连接数据库
运行结果为：
1234 0
已关闭DataSource!
12 个解决方案
#2
感谢大佬的回答，百度上的资料有点杂，也试了一些方法，都无法解决，你给我的连接里的方法，按理来说是可行的但是我的mysql目录下面没有my.ini文件
#3
MySQL版本是什么，有default.ini吗？
#4
#5
1.检查下MySQL 是不是可以正常连接的 2.如果是远程访问你检查下，本机到mysql服务器的网络是否正常，端口是不是通的
#6
MySQL的版本是5.7没看到default.ini，但是有个my-default.ini文件里面的内容
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#7
有没有通过mysql workbeach建立远程连接的方法，因为以前都是用sql server进行连接的所以对mysql操作还有些懵，望指点，谢谢大佬
#8
weixin_38423829
weixin_38423829 T1
MySQL的版本是5.7没看到default.ini，但是有个my-default.ini文件里面的内容
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#9
恩我说的就是my-default.ini
把my-default.ini改成my.ini
把my-default.ini改成my.ini
#10
类似的，输入IP 端口 用户名和密码
#11
我已经连接上数据库了，所以在workbeach中如何建立远程连接
#12
@weixin_38423829 workbench 工具就可以连接远程的数据库啊，，你需要的远程连接是上面意思，是从这个mysql数据库连接到另外一个mysql数据库吗？
#1
百度一下错误关键字很多资料
https://www.cnblogs.com/songyinan/p/6136025.html
https://www.cnblogs.com/songyinan/p/6136025.html
#2
感谢大佬的回答，百度上的资料有点杂，也试了一些方法，都无法解决，你给我的连接里的方法，按理来说是可行的但是我的mysql目录下面没有my.ini文件
#3
MySQL版本是什么，有default.ini吗？
#4
#5
1.检查下MySQL 是不是可以正常连接的 2.如果是远程访问你检查下，本机到mysql服务器的网络是否正常，端口是不是通的
#6
MySQL的版本是5.7没看到default.ini，但是有个my-default.ini文件里面的内容
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#7
有没有通过mysql workbeach建立远程连接的方法，因为以前都是用sql server进行连接的所以对mysql操作还有些懵，望指点，谢谢大佬
#8
weixin_38423829
weixin_38423829 T1
MySQL的版本是5.7没看到default.ini，但是有个my-default.ini文件里面的内容
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#9
恩我说的就是my-default.ini
把my-default.ini改成my.ini
把my-default.ini改成my.ini
#10
类似的，输入IP 端口 用户名和密码
#11
我已经连接上数据库了，所以在workbeach中如何建立远程连接
#12
@weixin_38423829 workbench 工具就可以连接远程的数据库啊，，你需要的远程连接是上面意思，是从这个mysql数据库连接到另外一个mysql数据库吗？