我正在尝试在我的 eclipse 中使用 tomcat 服务器运行一个简单的 servlet/mysql webapp。
当我尝试从 servlet 连接到数据库时，出现以下错误:
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create
PoolableConnectionFactory (Access denied for user ''@'localhost' (using password: YES))
下面是我执行的脚本:
servlet:
import java.io.IOException;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
public class EmployeeServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Resource(name = "jdbc/testDB")
DataSource ds;
public EmployeeServlet() {
super();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
Connection con = ds.getConnection();
Statement stmt = con.createStatement();
String query = "select * from Employee";
ResultSet rs = stmt.executeQuery(query);
PrintWriter out = response.getWriter();
response.setContentType("text/html");
out.print("<center><h1>Employee Details</h1></center>");
out.print("<html><body>");
out.print("<table border=\"1\" cellspacing=10 cellpadding=5>");
out.print("<tr><th>Employee ID</th>");
out.print("<th>Employee Name</th>");
out.print("<th>Salary</th>");
out.print("<th>Department</th></tr>");
while (rs.next()) {
out.print("<tr>");
out.print("<td>" + rs.getInt("emp_id") + "</td>");
out.print("<td>" + rs.getString("emp_name") + "</td>");
out.print("<td>" + rs.getDouble("salary") + "</td>");
out.print("<td>" + rs.getString("dept_name") + "</td>");
out.print("</tr>");
}
out.print("</table></body></html>");
} catch (SQLException e) {
e.printStackTrace();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
}
context.xml 文件的内容:
<?xml version="1.0" encoding="UTF-8"?>
<Context crossContext="true">
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<Resource name="jdbc/testDB" auth="Container"
type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="root" password="root"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost/mysql">
</Context>
最佳答案
尝试从任何其他工具/从命令提示符连接到 mysql，并使用您在代码中使用的所有信息来连接到相同的信息。尝试将端口也包含在连接 URL 中。默认端口为3306
关于java - 尝试从 myeclipse 中的 servlet 连接到 mysql 时访问被拒绝，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12816157/