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"C:\Program Files\Java\jdk1.8.0_201\bin\java.exe" -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:60083,suspend=y,server=n -javaagent:C:\Users\Freem\.IntelliJIdea2019.1\system\captureAgent\debugger-agent.jar -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_201\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\rt.jar;D:\workspace\jdbcDemo\out\production\jdbcDemo;D:\workspace\jdbcDemo\lib\mysql-connector-java-5.1.47.jar;D:\program files\JetBrains\IntelliJ IDEA 2019.1\lib\idea_rt.jar" com.bjsxt.JdbcTest

Connected to the target VM, address: '127.0.0.1:60083', transport: 'socket'

Tue Nov 05 19:37:11 CST 2019 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3978)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)

at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1714)

at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)

at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)

at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)

at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)

at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)

at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)

at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)

at java.sql.DriverManager.getConnection(DriverManager.java:664)

at java.sql.DriverManager.getConnection(DriverManager.java:247)

at com.bjsxt.JdbcTest.insertDepartments(JdbcTest.java:16)

at com.bjsxt.JdbcTest.main(JdbcTest.java:45)

Disconnected from the target VM, address: '127.0.0.1:60083', transport: 'socket'

Process finished with exit code 0

JAVA 全系列/第三阶段：数据库编程/JDBC技术（旧） 1624楼

package com.bjsxt;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.sql.Statement;

public class JdbcTest {

//向departments表中添加一条数据

public void insertDepartments(String department_name,int location_id){

Connection conn = null;

Statement state = null;

try {

//驱动注册

Class.forName("com.mysql.jdbc.Driver");

//创建连接

conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/bjsxt?useUnicode=true&characterEncoding=utf-8","root","123456");

//执行sql

String sql="insert into departments values(default,'"+department_name+"',"+location_id+")";

state = conn.createStatement();

int falg = state.executeUpdate(sql);

System.out.println(falg);

} catch (Exception e) {

e.printStackTrace();

}finally {

if (state !=null){

try {

state.close();

} catch (SQLException e) {

e.printStackTrace();

}

if (conn !=null){

try {

conn.close();

} catch (SQLException e) {

e.printStackTrace();

}

public static void main(String[] args) {

JdbcTest test = new JdbcTest();

test.insertDepartments("研发部",8);

}

还在报错。

JAVA 全系列/第三阶段：数据库编程/JDBC技术（旧） 1625楼

com.bjsxt;

java.sql.Connection;
java.sql.DriverManager;
java.sql.SQLException;
java.sql.Statement;

JdbcTest {
    insertDepartments(String department_name,location_id){
        Connection conn = ;
        Statement state = ;
        {
            Class.();
            conn = DriverManager.(,,);
            String sql=+department_name++location_id+;
            state = conn.createStatement();
            falg = state.executeUpdate(sql);
            System..println(falg);
        } (Exception e) {
            e.printStackTrace();
        }{
            (state !=){
                {
                    state.close();
                } (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
        (conn !=){
            {
                conn.close();
            } (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    main(String[] args) {
        JdbcTest test = JdbcTest();
        test.insertDepartments(,);
    }
}

还在报错，请老师解惑。

JAVA 全系列/第三阶段：数据库编程/JDBC技术（旧） 1626楼

com.bjsxt;

java.sql.Connection;
java.sql.DriverManager;
java.sql.SQLException;
java.sql.Statement;

JdbcTest {
    insertDepartments(String department_name,location_id){
        Connection conn = ;
        Statement state = ;
        {
            Class.();
            conn = DriverManager.(,,);
            String sql=+department_name++location_id+;
            state = conn.createStatement();
            falg = state.executeUpdate(sql);
            System..println(falg);
        } (Exception e) {
            e.printStackTrace();
        }{
            (state !=){
                {
                    state.close();
                } (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
        (conn !=){
            {
                conn.close();
            } (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    main(String[] args) {
        JdbcTest test = JdbcTest();
        test.insertDepartments(,);
    }
}

老师：String sql="insert into departments values(default,'"+department_name+"',"+location_id+")";（逗号加了后运行还在报错）

Mon Nov 04 18:55:35 CST 2019 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.