public class StudentDataPersistence {
public void insertStudentInfo(Student student) {
String url = "jdbc:oracle:thin:@localhost:1521:XE";
String username = "system";
String password = "Data03@";
Connection connection = null;
//Statement statement = null;
try {
//Step 1 : Register JDBC driver
Class.forName("oracle.jdbc.driver.OracleDriver");
//Step 2 : Open a connection
System.out.println("Connecting to a selected database...");
connection = DriverManager.getConnection(url, username, password);
if (connection != null) {
System.out.println("Connected to oracle");
}
//Step 3 : Write code to map Java Object to the Student_Info table
System.out.println("Inserting records into the database");
statement = connection.createStatement();
String sql = "insert into Student_Info " +
"VALUES(student.getName(),student.getRoll_no(),student.getAddress(),student.getPhone_no())";
statement.executeUpdate(sql);
System.out.println("Inserted student information into the database");
} catch (SQLException se) {
//handle errors for JDBC
se.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
//Handle errors for Class.forName
} finally {
System.out.println("Inside the finally block");
//finally block used to close resources
try {
statement.close();
} catch (SQLException se) {
se.printStackTrace();
}
try {
connection.close();
} catch (SQLException se) {
se.printStackTrace();
}
}
System.out.println("!GoodBye");
}
public static void main(String[] args) {
Student student = new Student("Bavin", 1, "Umar Nagar", "89898989809");
StudentDataPersistence obj = new StudentDataPersistence();
obj.insertStudentInfo(student);
}
}
它显示的错误:
连接到选定的数据库... 连接到oracle 将记录插入数据库 java.sql.SQLException:ORA-00904:“STUDENT”。“GETPHONE_NO”:标识符无效
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:189)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:242)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:554)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1478)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:888)
at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:2076)
at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:1986)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2697)
at oracle.jdbc.driver.OracleStatement.executeUpdate(OracleStatement.java:1035)
at org.core.hibernate.reason.StudentDataPersistence.insertStudentInfo(StudentDataPersistence.java:52)
at org.core.hibernate.reason.StudentDataPersistence.main(StudentDataPersistence.java:80)
在finally块内 !再见
回复的所有答案(那些用oracle查询说明它的答案)都是错误的。 请在发布前仔细查看。 当我发布关于相同的另一个帖子时我得到的正确答案:
String query =“insert into Student_Info(name,roll_no,address,phone_no)VALUES('”+ student.getName()+“',”+ student.getRoll_no()+“,'”+ student.getAddress( )+ “”, ' ”+ student.getPhone_no()+“')”;
答案 0 :(得分:0)
您已注释掉了Statement对象定义。因此,当您使用它时,语句对象是未知的。 取消注释这一行:
//Statement statement;
正如@putaro早先指出的那样,你需要引用SQL查询的某些部分。
String sql = "insert into Student_Info " +
"VALUES("+student.getName()+","+student.getRoll_no()+","+student.getAddress()+","+student.getPhone_no()+")";
这是将实际对象值插入查询中。报价中的内容将按原样插入。
答案 1 :(得分:0)
错误ORA-00904表示Oracle不知道标识符“STUDENT”。“GETPHONE_NO”看起来您正试图从SQL中将一些名称为“GetPhone_NO”的列插入表“Student”。所以你应该再次检查你的SQL和表结构
答案 2 :(得分:0)
我发现代码中存在两个问题。
“INSERT INTO student_info(name,roll_no,address,phone)VALUES(”+ student.getName()+“,”+ student.getRoll_no()+ “ ”+ student.getAddress()+“, ”+ student.getPhone_no()+“)”;
如果你使用像
这样的预备语句,那就更好了尝试更改
之类的查询“INSERT INTO student_info(name,roll_no,address,phone)VALUES(?,?,?,?)”
然后设置参数值。