u-orm 是一个适用、快速、简单、轻量级的 Java ORM 小型框架,无第三方包依赖，只有一个commons-logging.jar ，为了日志输出。整个jar包只有121KB，并封装了很多实用的操作函数，详细见api中的 org.uorm.dao.common.ICommonDao 。

enjoy it! just make your own simple orm.

POJO生成工具

提供数据库对应ORM类生成工具，详见Wiki里的“POJO生成工具”

使用简单

使用简单、上手快、灵活，无需学习HQL、Mybatis等，只需要会sql就行。 使用示例：

String driver = "com.mysql.jdbc.Driver";//"oracle.jdbc.driver.OracleDriver";                  /**连接字串 */                  String url = "jdbc:mysql://127.0.0.1/simdb";//"jdbc:oracle:thin:@127.0.0.1:1521:orcl";                  /** 数据库用户名 */                  String username = "root";//"cctv";//"root";                  /** 数据库密码 */                  String password = "root";//"1";//"root";                  long start = System.currentTimeMillis();                  DatasourceConfig config = new DatasourceConfig();                  config.setDriverClass(driver);                  config.setJdbcUrl(url);                  config.setUsername(username);                  config.setPassword(password);                  Map<String, String> poolPerperties = new HashMap<String, String>();                  //使用c3p0连接池                  poolPerperties.put("___POOL_TYPE_", "c3p0");                  poolPerperties.put("initialPoolSize", "2");                  poolPerperties.put("maxIdleTime", "600");                  poolPerperties.put("idleConnectionTestPeriod", "600");                  //装配c3p0连接池，不设置，代表不使用连接池，直接使用JDBC。                  //内置支持c3p0和BoneCP                  config.setPoolPerperties(poolPerperties);                  //ConnectionFactory可扩展自己的实现，支持你需要的连接池和业务逻辑                  ConnectionFactory connectionFactory = new DefaultConnectionFactory(config);                  ICommonDao dao = new CommonDaoImpl(connectionFactory );  //              dao.beginTransation();                  //按主键查                  User user = dao.queryBusinessObjByPk(User.class, 1);                  System.out.println(user.getLoginName());                  System.out.println("耗时：" + (System.currentTimeMillis() - start) + " ms");                  start = System.currentTimeMillis();                  List<User> users = dao.queryBusinessObjs(User.class, "select t.*, 'test' from UUM_USER t");                  System.out.println(users.size() + "," + users.get(0).getLoginName());                  Long count = dao.querySingleObject(Long.class, "select count(*) from UUM_USER");                  System.out.println(count);                  List<Map<String, Object>> userListMap = dao.queryForListMap("select * from UUM_USER");                  for (Map<String, Object> map : userListMap) {                          for (String key : map.keySet()) {                                  System.out.println(key + " = " + map.get(key));                          }                          System.out.println("----------------------");                  }                  Map<String, Object> u = dao.queryForMap("select * from UUM_USER");                  for (String key : u.keySet()) {                          System.out.println(key + " = " + u.get(key));                  }                  User uu = dao.querySingleObject(User.class, "select * from UUM_USER");                  System.out.println(uu.getLoginName());                  users = dao.queryBusinessObjs(User.class, "select * from UUM_USER where ID = ?", 0, 102, new SqlParameter(User.PROP_ID, 1));                  System.out.println("===============================");                  System.out.println(users.size());                  for(User ue : users){                          System.out.println(ue.getLoginName());                  }                  //分页查询  //              PaginationSupport<User> upage = dao.queryByPagedQuery(User.class, "select * from UUM_USER where ID = ?", 0, 10, new SqlParameter(User.PROP_ID, 1));                  PaginationSupport<User> upage = dao.queryByPagedQuery(User.class, "select * from UUM_USER", 1, 10);                  System.out.println("*************************************");                  System.out.println("total = " + upage.getTotalCount() + ", page count = " + upage.getPageCount());                  users = upage.getItems();                  System.out.println(users.size());                  for(User ue : users){                          System.out.println(ue.getLoginName());                  }                  System.out.println("---------- delete -------------------");                  System.out.println(dao.deleteBusiness(users.get(0)));  //              System.out.println("---------- update -------------------");  //              user.setUserName(user.getLoginName());  //              user.setPassword("123456");  //              user.setBirthday(new Date());  //              System.out.println(dao.updateBusinessObjs(false, user));  //              System.out.println("---------- save -------------------");                  List<User> userss = new ArrayList<User>();                  for(int i = 207; i <= 1+207; i ++){                          User uus = new User();//new User(i);                          uus.setLoginName("loginname-"+Utils.genRandomNum(6));                          uus.setUserName("username-"+ Utils.genRandomNum(6));                          uus.setPassword("password-"+i);                          uus.setDescription("desc-"+i);                          uus.setState(i);                          uus.setCreateTime(new Timestamp(System.currentTimeMillis()));                          uus.setUserCard("usercard-"+i);                          uus.setUserType(i);                          uus.setEmail("email-"+i);                          uus.setSex(i);                          uus.setAddress("address-"+i);                          uus.setBirthday(new Timestamp(System.currentTimeMillis()));  //                      uus.setTest("ddd");                          userss.add(uus);                  }                  System.out.println(dao.saveBusinessObjs(userss));  //              dao.commitTransation();                                    /**test id generator*/  //              User us =  new User();  //              us.setLoginName("loginname-id");  //              us.setUserName("username-id");  //              us.setPassword("password-id");  //              us.setDescription("desc-id");  //              us.setState(1);  //              us.setCreateTime(new Date());  //              us.setUserCard("usercard-id");  //              us.setUserType(1);  //              us.setEmail("email-id");  //              us.setSex(1);  //              us.setAddress("address-id");  //              us.setBirthday(new Date());  //              System.out.println(dao.saveBusinessObjs(us));  //              System.out.println(us.getId());  //              TestUuid test = new TestUuid();  //              test.setSeqNum(10);  //              System.out.println(dao.saveBusinessObjs(test));  //              System.out.println(test.getId());                                    /**test lob*/  //              CimData cimdata = dao.queryBusinessObjByPk(CimData.class, 2, 1);  //              System.out.println(cimdata.getCimClassId());  //              System.out.println(new String(cimdata.getCimOp()));  //              System.out.println(new String(cimdata.getCimInst()));  //              ObjectInputStream oi = new ObjectInputStream(new ByteArrayInputStream(cimdata.getCimInst()));  //              CimData cd = (CimData)oi.readObject();  //              System.out.println(cd.getCimClassId());  //              System.out.println(new String(cd.getCimOp()));  //              System.out.println(new String(cd.getCimInst()));                    //              ByteArrayOutputStream baos = new ByteArrayOutputStream();  //              ObjectOutputStream oos = new ObjectOutputStream(baos);  //              oos.writeObject(cimdata);  //              oos.flush();  //              baos.flush();  //              byte[] bytes = baos.toByteArray();  //              baos.close();  //              oos.close();  //              cimdata.setCimInst(bytes);  //              System.out.println( dao.updateBusinessObjs(false, cimdata) );                  System.out.println("耗时：" + (System.currentTimeMillis() - start) + " ms");

#支持数据库类型：

DB2、Postgresql、Oracle、MS-SqlServer、MySql、H2Database、Derby、HSQL、Firebird、 Interbase、Informix、Ingres (9,10)、Unisys 2200 Relational Database (RDMS)、TimesTen 5.1

#支持的主键生成器：

assigend、uuid、uuid.hex、guid、increment、sequence、select 用户可实现自己的主键生成器 实现接口org.uorm.dao.id.IdentifierGenerator。 并把ORM对应类的keyGenerator设置为实现的类全名例：org.uorm.dao.id.UUIDGenerator

Dependency jar(依赖包)

只有一个依赖包 commons-logging.jar ， 只是为了日志输出。

项目主页：http://www.open-open.com/lib/view/home/1329185086124