Database Spring+Hibernate JPA问题
我正在尝试使用Hibernate和JPA/EntityManager来执行数据库活动 现在我得到了这个错误，我不知道这意味着什么 在我有这个代码之前，它工作得很好Database Spring+Hibernate JPA问题,database,hibernate,spring,jpa,Database,Hibernate,Spring,Jpa,我正在尝试使用Hibernate和JPA/EntityManager来执行数据库活动 现在我得到了这个错误，我不知道这意味着什么 在我有这个代码之前，它工作得很好 public class JdbcProductDao extends Dao implements ProductDao { /** Logger for this class and subclasses */ protected final Log logger = LogFactory.getLog(getClass());
public class JdbcProductDao extends Dao implements ProductDao {
/** Logger for this class and subclasses */
protected final Log logger = LogFactory.getLog(getClass());
public List<Product> getProductList() {
logger.info("Getting products!");
List<Product> products = getSimpleJdbcTemplate().query(
"select id, description, price from products",
new ProductMapper());
return products;
}
public void saveProduct(Product prod) {
logger.info("Saving product: " + prod.getDescription());
int count = getSimpleJdbcTemplate().update(
"update products set description = :description, price = :price where id = :id",
new MapSqlParameterSource().addValue("description", prod.getDescription())
.addValue("price", prod.getPrice())
.addValue("id", prod.getId()));
logger.info("Rows affected: " + count);
}
private static class ProductMapper implements ParameterizedRowMapper<Product> {
public Product mapRow(ResultSet rs, int rowNum) throws SQLException {
Product prod = new Product();
prod.setId(rs.getInt("id"));
prod.setDescription(rs.getString("description"));
prod.setPrice(new Double(rs.getDouble("price")));
return prod;
}
}
public class JdbcProductDao implements ProductDao {
/** Logger for this class and subclasses */
//protected final Log logger = LogFactory.getLog(getClass());
@PersistenceContext()
private EntityManager entityManager;
public JdbcProductDao(){
}
public Product getReference(Product product){
return getEntityManager().getReference(product.getClass(),product.getId());
}
public void persist(Product product){
getEntityManager().persist(product);
}
public EntityManager getEntityManager(){
return entityManager;
}
public void setEntityManager(EntityManager entityManager){
this.entityManager = entityManager;
}
@SuppressWarnings("unchecked")
public List<Product> getProductList(){
return getEntityManager().createNativeQuery("select id, description, price from products").getResultList();
}
public void saveProduct(Product product){
getEntityManager().createNativeQuery("update products set description = " + product.getDescription() + " , price = " + product.getPrice() + " where id = " + product.getId());
}
private static class ProductMapper implements ParameterizedRowMapper<Product> {
public Product mapRow(ResultSet rs, int rowNum) throws SQLException {
Product prod = new Product();
prod.setId(rs.getInt("id"));
prod.setDescription(rs.getString("description"));
prod.setPrice(new Double(rs.getDouble("price")));
return prod;
}
}
javax.servlet.http.HttpServlet.serviceHttpServlet.java:717查看stacktrace-与JPA无关，JSP中标记的属性中存在EL语法错误。请发布完整的stacktrace。