Mybatis之MySql批量insert后返回主键

public class User
{
    private int d;
    private String name;
    private String pwd;
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
}

public interface UserMapper{
    int insertTest(List<User> user);
}

<insert id="insertTest" parameterType="java.util.List" useGeneratedKeys="true" keyProperty="id">
   insert into user (name,pwd) values
    <foreach collection="list" item="item" index="index" separator=","> 
         (#{item.name},#{item.pwd}) 
     </foreach> 
</insert>