Question

我拉着我的头发试图找到下面的SqlExcpetion的原因。我使用的是Oracle Database 11g Express和SqlDeveloper。我查看了其他帖子，但到目前为止没有任何帮助。

java.sql.SQLException: ORA-00917: missing comma

at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:447)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:951)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:513)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:227)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)
at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:195)
at oracle.jdbc.driver.T4CStatement.executeForRows(T4CStatement.java:1029)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1336)
at oracle.jdbc.driver.OracleStatement.executeQuery(OracleStatement.java:1498)
at oracle.jdbc.driver.OracleStatementWrapper.executeQuery(OracleStatementWrapper.java:406)
at com.ets.hr.dao.EmployeeDAO.createEmployee(EmployeeDAO.java:30)
at Test.main(Test.java:62)

以下方法：

public void createEmployee(Employee e){
    try{
        Class.forName(oracleClass);
        Connection conn = DriverManager.getConnection(oracleUrl, "hr", "hr");
        Statement s = conn.createStatement();
        String query = "INSERT INTO employees VALUES(" +
                       e.getEmployeeId() + ", '" +
                       e.getFirstName() + "', '" +
                       e.getLastName() + "', '" +
                       e.getEmail() + "', '" +
                       e.getPhoneNumber() + "', " +
                       e.getHireDate() + ", '" +
                       e.getJobId() + "', " +
                       e.getSalary() + ", " +
                       e.getCommissionPct() + ", " +
                       e.getManagerId() + ", " +
                       e.getDepartmentId() + ")";

        s.executeQuery(query);//LINE 30 - SqlException Here
        System.out.println("Query Executed: Create Employee");
    }
    catch(SQLException se){
        se.printStackTrace();
    }
    catch(ClassNotFoundException ce){
        ce.printStackTrace();
    }
}

员工类：

package com.ets.hr.dto;

import java.util.Date;

public class Employee {

//CONSTRUCTORS
public Employee(){}

public Employee(long eId, 
                String firstName, 
                String lastName, 
                String email, 
                String phoneNumber, 
                Date hireDate, 
                String jobId, 
                double salary, 
                double commissionPct,
                long managerId,
                long departmentId){
    this.firstName = firstName;
    this.lastName = lastName;
    this.email = email;
    this.phoneNumber = phoneNumber;
    this.hireDate = hireDate;
    this.jobId = jobId;
    this.salary = salary;
    this.commissionPct = commissionPct;
    this.managerId = managerId;
    this.departmentId = departmentId;
}

//instance variables (from HR.EMPLOYEE table)
private long employeeId;
private String firstName;
private String lastName;
private String email;
private String phoneNumber;
private Date hireDate;
private String jobId;
private double salary;
private double commissionPct;
private long managerId;
private long departmentId;

//GETTERS
public long getEmployeeId(){
    return this.employeeId;
}
public String getFirstName(){
    return this.firstName;
}
public String getLastName(){
    return this.lastName;
}
public String getEmail(){
    return this.email;
}
public String getPhoneNumber(){
    return this.phoneNumber;
}
public Date getHireDate(){
    return this.hireDate;
}
public String getJobId(){
    return this.jobId;
}
public double getSalary(){
    return this.salary;
}
public double getCommissionPct(){
    return this.commissionPct;
}
public long getManagerId(){
    return this.managerId;
}
public long getDepartmentId(){
    return this.departmentId;
}

//SETTERS
public void setEmployeeId(long employeeId){
    this.employeeId = employeeId;
}
public void setFirstName(String firstName){
    this.firstName = firstName;
}
public void setLastName(String lastName){
    this.lastName = lastName;
}
public void setEmail(String email){
    this.email = email;
}
public void setPhoneNumber(String phoneNumber){
    this.phoneNumber = phoneNumber;
}
public void setHireDate(Date hireDate){
    this.hireDate = hireDate;
}
public void setJobId(String jobId){
    this.jobId = jobId;
}
public void setSalary(double salary){
    this.salary = salary;
}
public void setCommissionPct(double commissionPct){
    this.commissionPct = commissionPct;
}
public void setManagerId(long managerId){
    this.managerId = managerId;
}
public void setDepartmentId(long departmentId){
    this.departmentId = departmentId;
}

public void printEmployee(){
    System.out.println("Employee ID: " + this.getEmployeeId());
    System.out.println("Employee Name: " + this.getFirstName() + this.getLastName());
    System.out.println("Employee Email: " + this.getEmail());
    System.out.println("Employee Phone: " + this.getPhoneNumber());
    System.out.println("Employee Hire Date: " + this.getHireDate());
    System.out.println("Employee Job ID: " + this.getJobId());
    System.out.println("Employee Salary: " + this.getSalary());
    System.out.println("Employee Commission Pct: " + this.getCommissionPct());
    System.out.println("Employee Manager ID: " + this.getManagerId());
    System.out.println("Employee Department ID: " + this.getDepartmentId());
}

}

Answer 1

看起来下列方法之一正在生成数据库期望引用/转义的值（可能包含逗号本身或其他数据库特殊字符）：

e.getEmployeeId()
e.getHireDate()
e.getSalary()
e.getCommissionPct()
e.getManagerId()
e.getDepartmentId()

我建议查看PreparedStatement类来帮助解决这类错误（以及防范基于SQL的安全漏洞）。

Answer 2

您不应该尝试构建自己的SQL字符串，因为您必须处理引用和转义（这里已经咬过你）。

相反，使用PreparedStatement并让JDBC API转义，引用和格式化（例如日期）您的值

String query = "INSERT INTO employees VALUES (?,?,?,?,?,?,?,?,?,?,?)";
PreparedStatement ps = conn.prepareStatement(query);
ps.setInt(e.getEmployeeId(), 1);
ps.setString(e.getFirstName(), 2);
ps.setDate(e.getHireDate(), 6);
// etc - there is a setter for each basic datatype
ps.execute();
ps.close();

编码更容易，可读性也越来越高。

Answer 3

正如OldProgrammer所提到的，而不是像这样嵌入值

Statement s = conn.createStatement();
String query = "INSERT INTO employees VALUES(" +
                   e.getEmployeeId() + ", '" +
                   e.getFirstName() + "', '" +
                   e.getLastName() + "', '" +
                   e.getEmail() + "', '" +
                   e.getPhoneNumber() + "', " +
                   e.getHireDate() + ", '" +
                   e.getJobId() + "', " +
                   e.getSalary() + ", " +
                   e.getCommissionPct() + ", " +
                   e.getManagerId() + ", " +
                   e.getDepartmentId() + ")";

s.executeQuery(query);

您可以使用PreparedStatement，然后在放入值时忽略/转义任何特殊的SQL语法。尝试这样做

String query = "INSERT INTO employees VALUES(?,?,?,?,?,?,?,?,?,?,?)";
PreparedStatement ps = conn.prepareStatement(query);
ps.setInt(1, e.getEmployeeId());
ps.setString(2, e.getFirstName());
//.... etc for the rest of your parameters

java.sql.SQLException：ORA-00917：缺少逗号

3 个答案: