Question

我是Spring和Hibernate的新手。我试图插入和检索数据库中的所有数据。我已经在mySql数据库中插入数据，现在我正在尝试从数据库中检索所有数据，但我得到一些例外。我能做些什么来解决这个问题。

Jul 04, 2012 10:46:58 AM org.hibernate.util.JDBCExceptionReporter logExceptions
WARNING: SQL Error: 1064, SQLState: 42000
Jul 04, 2012 10:46:58 AM org.hibernate.util.JDBCExceptionReporter logExceptions
SEVERE: You have an error in your SQL syntax; check the manual that corresponds to     your MySQL server version for the right syntax to use near ') as emp1_0_, employee0_.address as address0_, employee0_.emp_email as emp3_0_, ' at line 1
Hibernate: select employee0_.emp_id) as emp1_0_, employee0_.address as address0_, employee0_.emp_email as emp3_0_, employee0_.manager_id as manager4_0_, employee0_.emp_name as emp5_0_ from employee employee0_
org.hibernate.exception.SQLGrammarException: could not execute query

Hibernate代码是

public void getAll() {

    Session session = HibernateUtil.getSessionFactory().openSession();
    Transaction transaction = null;
    try {
        transaction = (Transaction) session.beginTransaction();
        List employees = session.createQuery("from Employee").list();
        for (Iterator iterator = employees.iterator(); iterator.hasNext();) {
            Employee employee = (Employee) iterator.next();
            System.out.println(employee.getName());
        }
        transaction.commit();
    } catch (HibernateException e) {
        transaction.rollback();
    } finally {
        session.close();
    }
}

Employee.java

@Entity
@Table(name="employee")
public class Employee {

private int id;
private String name;
private String email;
private String address;
private int managerId;


@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name="emp_id)")
public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

@Column(name="emp_name")
public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

@Column(name="emp_email")
public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

@Column(name="address")
public String getAddress() {
    return address;
}

public void setAddress(String address) {
    this.address = address;
}

@Column(name="manager_id")
public int getManagerId() {
    return managerId;
}

public void setManagerId(int managerId) {
    this.managerId = managerId;
}
}

Answer 1

这个

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name="emp_id)")
public int getId() {
    return id;
}

should be - 

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name="emp_id")
public int getId() {
    return id;
}

从)

的末尾删除name="emp_id)"

Answer 2

Id字段emp_id中存在拼写错误，有额外的'）'

@Column(name="emp_id)")

删除它将起作用的花括号。

Answer 3

您指定的ID的列名包含）删除它，例如

替换 @Column(name="emp_id)") with @Column(name="emp_id")

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name="emp_id")

org.hibernate.exception.SQLGrammarException：无法再次执行查询

3 个答案: