HibernateTools逆向工程工具不为生成器添加注释

Question

我创建了MySQL DB Schema,并且我使用Hibernate Reverse Engineering文件来创建带注释的域对象(.java).虽然文件生成正确,但它在某种程度上缺少ID字段的"Generator"注释.

下面是我的hibernate.reveng.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE
hibernate-reverse-engineering PUBLIC
"-//Hibernate/Hibernate Reverse
Engineering DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-reverse-engineering-3.0.dtd"
<hibernate-reverse-engineering>
  <table-filter match-name="products" match-catalog="test"></table-filter>
  <table catalog="test" name="products">
    <primary-key>
      <generator class="native"></generator>
      <key-column name="product_id"property="product_id" />
    </primary-key> 
  </table>
</hibernate-reverse-engineering>

和生成的类文件(Products.java):

// default package
// Generated Jan 21, 2011 8:27:16 PM by Hibernate Tools 3.3.0.GA

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

/**
 * Products generated by hbm2java
 */
@Entity
@Table(name = "products", catalog = "test")
public class Products implements java.io.Serializable {

 private String productId;
 private String productName;

 public Products() {
 }

 public Products(String productId) {
  this.productId = productId;
 }

 public Products(String productId, String productName) {
  this.productId = productId;
  this.productName = productName;
 }

 @Id
 @Column(name = "product_id", unique = true, nullable = false, length = 50)
 public String getProductId() {
  return this.productId;
 }

 public void setProductId(String productId) {
  this.productId = productId;
 }

 @Column(name = "product_name", length = 200)
 public String getProductName() {
  return this.productName;
 }

 public void setProductName(String productName) {
  this.productName = productName;
 }

}

我的hibernate.reveng.xml文件中是否缺少某些内容,或者hibernate是否为"generator"生成注释？

Answer 1

  <key-column name="product_id" property="product_id" />

这里有问题。这部分是正确的：key-column name="product_id"，它映射到 DB 列product_id，但这部分是错误的：property="product_id"，这是 Java 属性，称为productId，而不是product_id。这是正确的值：

  <key-column name="product_id" property="productId" />

是的：据我所知，自动生成仅适用于数字类型。