我使用Spring
和Hiberate
来创建简单的网络服务。在Controller中,我有很长的args表格。
我的控制器
@RequestMapping( value="/addAccount", method=RequestMethod.POST )
public String addAccoundPOST( @RequestParam( value = "username" ) String username,
@RequestParam( value = "password" ) String password,
@RequestParam( value = "email" ) String email,
@RequestParam( value = "name" ) String name,
@RequestParam( value = "surname" ) String surname,
@RequestParam( value = "birth_date" ) String birth_date,
@RequestParam( value = "place" ) String place,
@RequestParam( value = "province" ) String province,
@RequestParam( value = "motorcycle" ) String motorcycle,
@RequestParam( value = "tel" ) String tel )
{
User user = new User();
if( username != null && username.length() >= 4 )
user.setUsername( username );
if( password != null && password.length() >= 4 )
user.setPassword( password );
// and more, and more, and mode....
return "addAccount";
}
用户类的一部分:
@Entity
@Table( name = "users", catalog = "dbjadenazlot" )
public class User implements Serializable {
private int uid;
private String ...;
/* --------------------------------- GET ------------------------------ */
@Id
@GeneratedValue(strategy = IDENTITY)
@Column( name = "uid", unique = true, nullable = false )
public int getUID()
{ return uid;}
@Column( name = "name", length = 45 )
public String getName()
{ return name; }
// setters and rest code..
}
是否可以将我的参数从POST请求转换为类?如果可能,需要什么?
@RequestMapping( value="/addAccount", method=RequestMethod.POST )
public String addAccoundPOST( @RequestParam( value = "user") User user )
{
return "addAccount";
}
我怎样才能缩短代码?
答案 0 :(得分:3)
首先,在你的第一个例子中,
if( username != null && username.length() >= 4 )
无需检查null
。如果无法解析@RequestParam
,Spring将返回400状态代码。
可以将我的参数从POST请求转换为类吗?如果可能,需要什么?
是的,创建一个类,可能是您的User
类,其中的字段与请求参数的名称相同。使您的处理程序方法接受该类的参数。
public String addAccoundPOST( @ModelAttribute User user )
如果您想验证它,只需添加@Valid
。
public String addAccoundPOST( @Valid @ModelAttribute User user )