理解javajdbc错误
我希望在理解这个错误方面能得到一些帮助。我正在与数据库建立一个简单的连接，出于某种原因，它不喜欢我的输入，但我无法理解错误实际发生的位置。任何帮助都将不胜感激-谢谢 我的代码：理解javajdbc错误,java,mysql,jdbc,Java,Mysql,Jdbc,我希望在理解这个错误方面能得到一些帮助。我正在与数据库建立一个简单的连接，出于某种原因，它不喜欢我的输入，但我无法理解错误实际发生的位置。任何帮助都将不胜感激-谢谢 我的代码： package db; import java.sql.*; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Scanner; public class BankAcco
package db;
import java.sql.*;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;
public class BankAccount {
private static String JDBC_DRIVER = "com.mysql.jdbc.Driver";
private static String DB_URL = "jdbc:mysql://localhost:3306/cs565";
private static String DB_USERNAME = "cs";
private static String DB_PASSWORD = "java";
// public String name;
// public String action;
// public double amount;
// create the table
public static void createTable(){
try
{
Class.forName(JDBC_DRIVER);
Connection conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
Statement stmt = conn.createStatement();
String sqlDropStatement = "DROP TABLE MYTABLE_TRANSACTIONS";
try {
stmt.executeUpdate(sqlDropStatement);
}
catch (Exception e)
{
System.out.println("No old data found");
}
String sqlCreateStatement = "CREATE TABLE MYTABLE_TRANSACTIONS" +
"(TRANSACTION_ID integer auto_increment primary key," +
"ACCOUNT_ID varchar(32)," +
"TRANSACTION_TYPE varchar(32)," + "AMOUNT double)";
stmt.executeUpdate(sqlCreateStatement);
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values ('John Adams', 'initial', 100.00)";
stmt.executeUpdate(sql);
sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values ('Benjamin Franklin', 'initial', 200.00)";
stmt.executeUpdate(sql);
sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values ('George Washington', 'initial', 300.00)";
stmt.executeUpdate(sql);
sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values ('Thomas Jefferson', 'initial', 400.00)";
stmt.executeUpdate(sql);
sql = "Select * from MYTABLE_TRANSACTIONS";
ResultSet rs = stmt.executeQuery(sql);
//iterate through rows & print
while (rs.next())
{
System.out.printf("TRANSACTION_ID=%2d, ACCOUNT_ID=%8s, TRANSACTION_TYPE=%8s, AMOUNT=%8s\n",
rs.getInt("TRANSACTION_ID"),
rs.getString("ACCOUNT_ID"),
rs.getString("TRANSACTION_TYPE"),
rs.getDouble("AMOUNT"));
}
//close the connection here
stmt.close();
} catch (Exception e) {
e.printStackTrace();
}
}// end of create table method
// the deposit method
public static void makeDeposit(String name, String action, double amount){
try
{
Class.forName(JDBC_DRIVER);
Connection conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
Statement stmt = conn.createStatement();
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values (name, action, amount)";
stmt.executeUpdate(sql);
sql = "Select * from MYTABLE_TRANSACTIONS";
ResultSet rs = stmt.executeQuery(sql);
//iterate through rows & update
while (rs.next())
{
System.out.printf("TRANSACTION_ID=%2d, ACCOUNT_ID=%8s, TRANSACTION_TYPE=%8s, AMOUNT=%8s\n",
rs.getInt("TRANSACTION_ID"),
rs.getString("ACCOUNT_ID"),
rs.getString("TRANSACTION_TYPE"),
rs.getDouble("AMOUNT"));
}
//close the connection here
stmt.close();
} catch (Exception e) {
e.printStackTrace();
}
}//********end of deposit method
// the withdrawal method
public static void makeWithdrawal(String name, String action, double amount){
try
{
Class.forName(JDBC_DRIVER);
Connection conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
Statement stmt = conn.createStatement();
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values (name, action, amount)";
stmt.executeUpdate(sql);
sql = "Select * from MYTABLE_TRANSACTIONS";
ResultSet rs = stmt.executeQuery(sql);
//iterate through rows & update
while (rs.next())
{
System.out.printf("TRANSACTION_ID=%2d, ACCOUNT_ID=%8s, TRANSACTION_TYPE=%8s, AMOUNT=%8s\n",
rs.getInt("TRANSACTION_ID"),
rs.getString("ACCOUNT_ID"),
rs.getString("TRANSACTION_TYPE"),
rs.getDouble("AMOUNT"));
}
//close the connection here
stmt.close();
} catch (Exception e) {
e.printStackTrace();
}//********end of withdrawal method
}
public static void main(String[] args) {
//Prompt the user- what would you like to do?
// withdrawal / deposit / view balance
String name;
String action;
double amount;
createTable();
System.out.println("Please enter the name of your account: ");
Scanner input = new Scanner( System.in );
name = input.nextLine();
System.out.println("Welcome " + name);
System.out.println("What would you like to do? ");
//Deposit, Withdrawal, check balance
System.out.println("D= Deposit, W = Withdrawal, B = Show balance ");
action = input.nextLine();
//NOTE: fix this to where the letter inserts the entire word into the table
System.out.println("You chose " + action);
switch (action) {
case "D":
System.out.println("How much would you like to deposit?");
amount = input.nextDouble();
System.out.println("You selected " + amount);
makeDeposit(name, action, amount);
break;
case "W":
System.out.println("How much would you like to withdraw? ");
amount = input.nextDouble();
System.out.println("You selected " + amount);
makeWithdrawal(name, action, amount);
break;
case "B": System.out.println("You chose " + action);
// a print method here using WHERE
break;
}// end of switch
//something to bring back to the top
}
}
TRANSACTION_ID= 1, ACCOUNT_ID=John Adams, TRANSACTION_TYPE= initial, AMOUNT= 100.0
TRANSACTION_ID= 2, ACCOUNT_ID=Benjamin Franklin, TRANSACTION_TYPE= initial, AMOUNT= 200.0
TRANSACTION_ID= 3, ACCOUNT_ID=George Washington, TRANSACTION_TYPE= initial, AMOUNT= 300.0
TRANSACTION_ID= 4, ACCOUNT_ID=Thomas Jefferson, TRANSACTION_TYPE= initial, AMOUNT= 400.0
Please enter the name of your account:
George Washington
Welcome George Washington
What would you like to do?
D= Deposit, W = Withdrawal, B = Show balance
D
You chose D
How much would you like to deposit?
10.00
You selected 10.0
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'name' in 'field list'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2642)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1647)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1566)
at db.BankAccount.makeDeposit(BankAccount.java:100)
at db.BankAccount.main(BankAccount.java:187)
问题来自
makeDeposit（）String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values (name, action, amount)";
stmt.executeUpdate(sql);
name为了提供更深入的了解，错误是在错误发生之前运行的方法的列表。位于顶部的是最近的一个。因此，一切都从运行
makeDeposit（）main（）stmt.executeUpdated（sql）makeDeposit（）String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values (name, action, amount)";
stmt.executeUpdate(sql);
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values ('" + name + "', '" + action + "', " + amount + ")";
name为了提供更深入的了解，错误是在错误发生之前运行的方法的列表。位于顶部的是最近的一个。因此，一切都从运行
makeDeposit（）main（）stmt.executeUpdated（sql）makeDeposit（）String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values (name, action, amount)";
stmt.executeUpdate(sql);
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values ('" + name + "', '" + action + "', " + amount + ")";
name为了提供更深入的了解，错误是在错误发生之前运行的方法的列表。位于顶部的是最近的一个。因此，一切都从运行
makeDeposit（）main（）stmt.executeUpdated（sql）makeDeposit（）String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values (name, action, amount)";
stmt.executeUpdate(sql);
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values ('" + name + "', '" + action + "', " + amount + ")";
namemakeDeposit（）main（）stmt.executeUpdated（sql）String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values ('" + name + "', '" + action + "', " + amount + ")";
/尼克永远不要在替换中使用简单语句。使用preparedStatement代替[Read:]
不要将普通语句与替换一起使用。使用preparedStatement代替[Read:]
不要将普通语句与替换一起使用。使用preparedStatement代替[Read:]
不要将普通语句与替换一起使用。使用preparedStatement代替[Read:] 在这一行中更改makeDeposit（）方法：在本例中，您并没有使用变量，而是将它们用作简单字符串
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values(name, action, amount)";
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values(name, action, amount)";
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values(name, action, amount)";
String sql = "insert into MYTABLE_TRANSACTIONS (ACCOUNT_ID,TRANSACTION_TYPE,AMOUNT) values(name, action, amount)";
谢谢你的解释！谢谢你的解释！谢谢你的解释！谢谢你的解释！我不想违反网站的规则，但谢谢大家的帮助-我很感激！我不想违反网站的规则，但谢谢大家的帮助-我很感激！我不想违反网站的规则，但谢谢大家的帮助-我很感激！我不想违反网站的规则，但谢谢大家的帮助-我很感激！