几年前写的一个JDBC工具，一直没时间整理出来，断断续续整理了一下，具有特性：
数组SQL参数支持。
分页支持（Oracle，SQLServer，MySQL等），可自定义分页逻辑。
数据库连接共享。
批量数据操作。
轻量，仅依赖slf4j。
为什么要有这玩意，行业内已经有了Spring JDBC，Commons DbUtils等，整体来说实现思路相似，算是重新发明轮子，
但是如果您想尝尝鲜，可以尝试下。
源代码： GitHub https://github.com/chyxion/newbie-jdbc GitOSC http://git.oschina.net/chyxion/newbie-jdbc
使用方式： Maven依赖：
<dependency> <groupId>me.chyxion</groupId> <artifactId>newbie-jdbc</artifactId> <version>0.0.1-RELEASE</version> </dependency>
使用样例：
// init datasource, here use DruidDataSource as demo DruidDataSource datasource = null; datasource = new DruidDataSource(); datasource.setUrl("jdbc:mysql://127.0.0.1/demo"); datasource.setUsername("root"); datasource.setPassword("password"); datasource.init(); // create NewbieJdbc object NewbieJdbc jdbc = new NewbieJdbcSupport(datasource);
Basic Query
// count of users int count = jdbc.findValue( "select count(1) from users"); // find name of user id is 2008110101 String name = jdbc.findValue( "select name from users where id = ?", "2008110101"); // find names of user id is 101 or 102 // 0. array as params List<String> names = jdbc.listValue( "select name from users where id in (?)", "101", "102"); // 1. collection as params names = jdbc.listValue( "select name from users where id in (?)", Arrays.asList("101", "102")); // 2. map as params Map<String, Object> params = new HashMap<String, Object>(); params.put("id", Arrays.asList("101", "102")); // or: // params.put("id", new String[] {"101", "102"}); names = jdbc.listValue( "select name from users where id in (:id)", params); // find user of id is 101 Map<String, Object> mapUser = jdbc.findMap( "select id, name, gender from users where id = ?", "101"); // list users of age is 24 List<Map<String, Object>> listUsers = jdbc.listMap( "select id, name, gender from users where age = ?", 24);
Advance Query
// find id and name as a string array String[] idAndName = jdbc.findOne(new Ro<String[]>() { public String[] exec(ResultSet rs) throws SQLException { return new String[] { rs.getString("id"), rs.getString("name")}; } }, "select id, name from users where id = ?", "101"); // find names of gender is M String names = jdbc.list(new Ro<String>() { public String exec(ResultSet rs) throws SQLException { return rs.getString("name"); } }, "select name from users where gender = ?", "M"); // find name of user id is 101, same as findValue String name = jdbc.query(new Ro<String>() { public String exec(ResultSet rs) throws SQLException { return rs.next() ? rs.getString(1) : null; } }, "select name from users where id = ?", "101"); // list users of gender F offset 10 limit 16 List<Map<String, Object>> users = jdbc.listMapPage( "select * from users where gender = ?", Arrays.asList(new Order("date_created", Order.DESC)), 10, 16, "F");
Insert And Update
// insert one Map<String, Object> mapUser = new HashMap<String, Object>(); mapUser.put("id", "103"); mapUser.put("name", "Shaun Chyxion"); mapUser.put("gender", "M"); mapUser.put("date_created", new Date()); jdbc.insert("users", mapUser); // insert batch Collection<Collection<?>> users = Arrays.<Collection<?>>asList( Arrays.<Object>asList("104", "Xuir", "F", new Date()), Arrays.<Object>asList("105", "Sorina Nyco", "F", new Date()), Arrays.<Object>asList("106", "Gemily", "F", new Date()), Arrays.<Object>asList("107", "Luffy", "M", new Date()), Arrays.<Object>asList("108", "Zoro", "M", new Date()), Arrays.<Object>asList("109", "Bruck", "M", new Date())); jdbc.insert("users", Arrays.asList("id", "name", "gender", "date_created"), args, 3); // update gender to F of user 102 jdbc.update("update users set gender = ? where id = ?", "F", "102"); Reusble Connection And Transaction // find user of id is 101 and books uses same connection Map<String, Object> mapUserWithBooks = jdbc.execute(new Co<Map<String, Object>>() { @Override protected Map<String, Object> run() throws SQLException { String userId = "101"; Map<String, Object> mapRtn = findMap( "select * from users where id = ?", userId); mapRtn.put("books", listMap("select * from books where user_id = ?", userId)); return mapRtn; } }); // execute transaction Map<String, Object> mapUser = jdbc.executeTransaction(new Co<Map<String, Object>>() { @Override protected Map<String, Object> run() throws SQLException { update("delete users where id = ?", "104"); update("update users set age = ? where id = ?", 24, "103"); return findMap("select * from users where id = ?", 106); } });
Execute SQL // create table users
jdbc.execute( "create table users (" + "id varchar(36) not null, " + "name varchar(36) not null, " + "primary key (id))");
Customize Newbie JDBC
// create table users CustomResolver customResolver = new CustomResolver() { // set StringBuilder as String public void setParam(PreparedStatement ps, int index, Object param) throws SQLException { if (param instanceof StringBuilder) { ps.setString(index, param.toString()); } else { ps.setObject(index, param); } } // read CLOB as String public Object readValue(ResultSet rs, int index) throws SQLException { Object valueRtn = null; if (Types.CLOB == rs.getMetaData().getColumnType(index)) { valueRtn = rs.getClob(index).toString(); } else { valueRtn = rs.getObject(index); } return valueRtn; } // use MySQLCompatiblePaginationProcessor to paginate public PaginationProcessor getPaginationProcessor( Connection conn) { return new MySQLCompatiblePaginationProcessor(); } }; jdbc = new NewbieJdbcSupport(dataSource, customResolver);
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