jdao1.1.6 发布,轻量级 ORM 工具包

jdao1.1.6已发布,jdao是一个Java的轻量级orm工具包,根据表名可以生成与之对应的dao类,同时也支持原生sql语句操作。

本次更新如下:

  1. 增加了DBUtils 类,具体使用请参考 DaoTest,RsScanTest

  2. 修复部分bug,数据源设置做了修改。请参考 DaoTest,RsScanTest

v1.1.6
jdao 初始化:

DaoFactory.setDefaultDataSource(getDataSource());

jdao初始化 设置数据源,一步完成。

getDataSource()获取数据源方法:
如:ActionTest1_1_2.java 中:

public static DataSource getDataSource() throws Exception  
Properties p = new Properties(); 
p.load(ActionTest1_1_2.class.getClassLoader().getResourceAsStream("druid.properties")); 
return DruidDataSourceFactory.createDataSource(p);

例如:对 数据库表名为 hstest的操作

CREATE TABLE hstest ( 
id int(10) DEFAULT NULL, 
value varchar(50) DEFAULT '', 
rowname varchar(50) DEFAULT '' 
)

一.生成dao对象,生成Hstest.java

public void createDao() throws Exception  
Class.forName("com.mysql.jdbc.Driver"); 
String driverUrl = "jdbc:mysql://127.0.0.1:3306/test"; 
String path = System.getProperty("user.dir") + "/test/com/jdao/action"; 
CreateDaoUtil.createFile("com.jdao.action", "hstest",path,DriverManager.getConnection(driverUrl, "root", "123456"), "utf-8"); 
//com.jdao.action 为 Hstest的包名 
//hstest为表名 

二.对Hstest对象的操作 查询SQL: select value,rowname from hstest where id between 2 and 10;
jdao对象操作如下:

Hstest t = new Hstest(); 
t.where(Hstest.ID.BETWEEN(2, 10)); 
t.query(Hstest.VALUE, Hstest.ROWNAME);
插入SQL: insert into hstest (id,rowname,value) values(1,"donnie","wuxiaodong") 
jdao对象操作如下: 
Hstest t = new Hstest(); 
t.setId(1); 
t.setRowname("donnie"); 
t.setValue("wuxiaodong"); 
t.save();
批量插入SQL: insert into hstest (id,rowname,value) values(1,"donnie1","wuxiaodong1"),(2,"donnie2","wuxiaodong2"),(3,"donnie3","wuxiaodong3") 
jdao对象操作如下: 
Hstest t = new Hstest(); 
t.setId(1); 
t.setRowname("donnie1"); 
t.setValue("wuxiaodong1"); 
t.addBatch(); 
t.setId(2); 
t.setRowname("donnie2"); 
t.setValue("wuxiaodong2"); 
t.addBatch(); 
t.setId(3); 
t.setRowname("donnie3"); 
t.setValue("wuxiaodong3"); 
t.addBatch(); 
t.batchForSave();
更新SQL: update hstest set rowname="wuxiaodong",value="wuxiaodong" where id=10 
jdao对象操作如下: 
Hstest t = new Hstest(); 
t.setRowname("wuxiaodong"); 
t.setValue("wuxiaodong"); 
t.where(Hstest.ID.EQ(10)); 
t.update(); 
删除SQL: delete from hstest where id=2 
jdao对象操作如下: 
Hstest t = new Hstest(); 
t.where(Hstest.ID.EQ(2)); 
t.delete();

三.支持SQL操作 DBUtils

DBUtils<?> db=new DBUtils(); 
db.select("select * from hstest where id=? limit 1",1); 
System.out.println(db.getString("value")); 
int i = db.execute("insert into hstest(rowname,value)values(?,?)",1,2);

四.自定义类继承 DBUtils
任何子类继承自DBUtils 都可以设置与其对应的数据源,同时支持sql编写,支持翻页
如:

class RsTest extends DBUtils {} 
//翻页 
public static void testSelectListPage() throws Exception  
RsTest rt = new RsTest(); 
// 分页查询方法 
rt.selectListPage(0, 20, "select * from hstest"); 
System.out.println(rt.rsList().size()); 
// selectListPage 会返回 totalcount 
List list = rt.rsList(); 
for (RsTest r : list)  
System.out.println(r.getString("value")); 
 
}

//单行返回

public static void testSelect() throws Exception  
RsTest rt = new RsTest(); 
rt.select("select * from hstest where id=?", 1); 
System.out.println(rt.getString("value")); 
rt.select("select * from hstest where id=?", 2); 
System.out.println(rt.getString("value")); 

//插入

public static void testInsert() throws Exception  
RsTest rt = new RsTest(); 
System.out.println(rt.execute("insert into hstest(value,rowname)values(?,?),(?,?) ", "wu1", "11", "wu2", "22")); 

//生成dao 的翻页测试类

public static void testPageTurn() throws Exception  
Hstest ht = new Hstest(); 
ht.setPageTurn(true); //翻页 
ht.where(Hstest.ID.GE(0)); 
List list = ht.query(); 
System.out.println("totalcount:" + list.get(0).getTotalcount()); 
for (Hstest h : list)  
System.out.println(h.getRowname() + " " + h.getValue()); 
 
}

//PageDao类测试

public static void testPageDao() throws Exception  
Hstest ht = new Hstest(); 
ht.where(Hstest.ID.GE(1)); 
PageDao pd = ht.selectListPage(); 
System.out.println("totalcount:" + pd.getTotalcount()); 
List list = pd.getList(); 
for (Hstest h : list)  
System.out.println(h.getRowname() + " " + h.getValue()); 
 
}

五.事务

Transaction t = new Transaction(getDataSource()); 
Hstest hstest = new Hstest(); 
hstest.setTransaction(t); 
hstest.setRowname("wu"); 
hstest.setValue("dong"); 
hstest.save(); 
Hstest hstest2 = new Hstest(); 
hstest2.setTransaction(t); 
hstest2.setRowname("wu2"); 
hstest2.setValue("dong2"); 
hstest2.save(); 
DBUtils rt = new DBUtils(); 
rt.setTransaction(t); 
rt.execute("insert into hstest(rowname,value)values(?,?)", 1, 2); 
t.rollBackAndClose();

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jdao1.1.6 发布,轻量级 ORM 工具包