package com.mybatis.pojo;
import java.util.Date;
public class User {
private Integer id;
private String username;
private String sex;
private Date birthday;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", sex='" + sex + '\'' +
", birthday=" + birthday +
", address='" + address + '\'' +
'}';
}
}
n SqlMapConfig.xml
n UserMapper.xml
n 测试程序
@Test
public void testMybatis() throws IOException {
InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml");
SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(inputStream);
SqlSession sqlSession = sqlSessionFactory.openSession();
List list = sqlSession.selectList("test.queryUserList");
if(list != null && list.size() > 0) {
for (int i = 0; i < list.size(); i++) {
User user = list.get(i);
System.out.println(user);
}
}
sqlSession.close();
}
[理解]关于三个对象
l SqlSessionFactoryBuilder： 创建工厂，生命周期短暂即可，类似于一个工具类
l SqlSessionFactory： 应该只有一个工厂对象即可。
l SqlSession： 和数据库通信的会话对象，底层对应connection连接。例如：假如多个线程公用一个sqlsession对象（connection），线程A操作了数据库尚未提交事务，线程B操作了数据库把这个connecttion的事务给提交了，会造成数据安全问题。所以一个线程应该有自己的一个sqlsession对象。
/**
* 测试用例(Use_case)：根据用户名模糊查询用户列表
*/
@Test
public void testQueryUserByUsername() throws IOException {
InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml");
SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(inputStream);
SqlSession sqlSession = sqlSessionFactory.openSession();
// TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
List userList = sqlSession.selectList("test.queryUserByUsername","%王%");
if(userList != null && userList.size() > 0) {
for (int i = 0; i < userList.size(); i++) {
User user = userList.get(i);
System.out.println(user);
}
}
sqlSession.close();
inputStream.close();
}
l ${}方式取参
n UserMapper.xml
n 测试程序
/**
- 测试用例(Use_case)：根据用户名模糊查询用户列表$取参形式
*/
@Test
public void testQueryUserByUsername$() throws IOException {
InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml");
SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(inputStream);
SqlSession sqlSession = sqlSessionFactory.openSession();
// TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
List userList = sqlSession.selectList("test.queryUserByUsername$","'%王%'");
if(userList != null && userList.size() > 0) {
for (int i = 0; i < userList.size(); i++) {
User user = userList.get(i);
System.out.println(user);
}
}
sqlSession.close();
inputStream.close();
}
@Insert("insert into user(username,sex,birthday,address) values (#{username},#{sex},#{birthday},#{address})")
/*回显mysql自增主键id
等同于原来我们xml中使用，一一对应过来即可
* */
@SelectKey(statement = "select last_insert_id()",before = false,keyProperty = "id",resultType = Integer.class)
void saveUser(User user);
@Update("update user set username=#{username} where id=#{id}")
void updateUsernameById(User user);
@Delete("delete from user where id=#{id}")
void deleteUserById(Integer id);
@Select("select id,username,sex,birthday,address from user where id=#{id}")
User queryUserById(Integer id);
@Select("select id,username,sex,birthday,address from user")
List queryUserList();
@Select("")
List queryUserByWhere(User user);
@Select("")
List queryUserByIdsList(List ids);
最近mysql数据库经常死掉，用命令net stop mysql命令也无法停掉，关闭Tomcat的时候，出现Waiting for N instance(s) to be deallocated 信息。查了下，大概就是程序没有对数据库连接释放，导致Connection泄露了。因为用的是开元集成的平台，内部程序也不可能一下子给改掉的，就验证一下咯。启动Tomcat,用户登录系统，用netstat -
var a=document.getElementsByClassName('textinput');
var b=[];
for(var m=0;m<a.length;m++){
if(a[m].getAttribute('placeholder')!=null)
b.push(a[m])
}
var l
错误信息：
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cartService': Scope 'session' is not active for the current thread; consider defining a scoped
这个开源软件包是国内的一位高手自行研制开发的，正如他所说的一样，我觉得它可以使一个工作流引擎上一个台阶。。。。。。欢迎大家使用，并提出意见和建议。。。
----------转帖---------------------------------------------------
IK Expression是一个开源的（OpenSource），可扩展的（Extensible），基于java语言
1.在thingking in java 的第四版第六章中明确的说了，子类对象中封装了父类对象，
2."When you create an object of the derived class, it contains within it a subobject of the base class. This subobject is the sam
http://www.sap.com/corporate-en/press.epx?PressID=14787
有机会研究下EIM家族的两个新产品~~~~
New features of the 4.0 releases of BI and EIM solutions include:
Real-time in-memory computing –
结构
继承关系
public final class Manifest extends Objectjava.lang.Objectandroid.Manifest
内部类
class Manifest.permission权限
class Manifest.permission_group权限组
构造函数
public Manifest () 详细 androi
关键字：Oracle实现类split函数的方
项目里需要保存结构数据，批量传到后他进行保存，为了减小数据量，子集拼装的格式，使用存储过程进行保存。保存的过程中需要对数据解析。但是oracle没有Java中split类似的函数。从网上找了一个，也补全了一下。
CREATE OR REPLACE TYPE t_split_100 IS TABLE OF VARCHAR2(100);
cr
