我有用户实体并试图通过id从base获取它.实体定义如下.
package com.hibernate.logic;
import java.io.Serializable;
import java.util.Random;
import javax.persistence.*;
@Entity
@Table(name="users")
public class User implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(name="user_id")
private Long userId;
@Column(name="middlename")
private String middlename;
@Column(name="name")
private String name;
@Column(name="surname")
private String surname;
@Column(name="pass")
private String pass;
//bi-directional many-to-one association to Role
@ManyToOne
@JoinColumn(name="role_id")
private Role role;
public User() {
Random random = new Random();
this.userId = random.nextLong();
this.name = "";
this.surname = "";
this.middlename = "";
}
public Long getUserId() { …我正在尝试使用hbm2ddl.auto = update更新现有表.
在几个表中有几列,其中数据库列定义从实体中的声明更改.喜欢
@Column(name="mycolumn", nullable=false, length=10)
private Long mycolumn;
和
'mycolumn'bigint(20)not null默认值为0
在MySQL中.
为什么hbm2ddl不更新这样的东西？是否有可能强制进行此类更新？我想说hbm2ddl删除列的默认值并更改类型的长度.
我正在尝试使用servlet获取cookie
Cookie[] cookie = request.getCookies();
但cookie总是如此null.
所以我从另一个servlet设置它们,它们出现在浏览器首选项中.
Cookie cookie = new Cookie("color", "cyan");
cookie.setMaxAge(24*60*60);
cookie.setPath("/");
response.addCookie(cookie);
我不明白什么是错的？
有没有办法验证异常是否被捕获？我的意思是在我的方法中有一种情况,我应该捕获异常,在测试中,我想验证异常是否真正被捕获.
我正在尝试使用tc Server Idea插件在Idea中运行我的应用程序并收到以下日志
Connected to server
wrapper | Starting the VMware vFabric tc Runtime instance - tcruntime-C-STS-vfabric-tc-server-developer-2.8.2.RELEASE-insight service...
wrapper | VMware vFabric tc Runtime instance - tcruntime-C-STS-vfabric-tc-server-developer-2.8.2.RELEASE-insight started.
[11:53:08.709] Not allowed to connect. Check role and password.
[11:53:08.709] There is an application at /bps. Starting redeploy...
[11:53:08.714] Not allowed to connect. Check role and password.
[11:53:08.715] Starting undeployment of /bps ...
[11:53:08.720] Not allowed to connect. Check role and password.
[11:53:08.721] Starting deployment of 'bps:war exploded' to /bps ...
[11:53:08.725] …我正在尝试在Spring Roo中安装MySQL JDBC驱动程序.这是日志:
roo> addon search --requiresDescription "#jdbcdriver,driverclass:com.mysql.jdbc.Driver"
0 found, sorted by rank; T = trusted developer; R = Roo 1.2 compatible
ID T R DESCRIPTION -------------------------------------------------------------
--------------------------------------------------------------------------------
[HINT] use 'addon info id --searchResultId ..' to see details about a search result
[HINT] use 'addon install id --searchResultId ..' to install a specific search result, or
[HINT] use 'addon install bundle --bundleSymbolicName TAB' to install a specific add-on version
我该做什么？