Apache sdo学习笔记（六）——数据访问服务（DAS）访问关系数据库

1：建立数据库（dastest）和表（userinfo），这里使用mysql，如下图：

2：配置文件UsersConfig.xml,src下。

<?xml version="1.0" encoding="UTF-8"?>
 <Config xmlns="http:///org.apache.tuscany.das.rdb/config.xsd"> 
    
	<ConnectionInfo>
		<ConnectionProperties driverClass="com.mysql.jdbc.Driver"
			databaseURL="jdbc:mysql://127.0.0.1/dastest" userName="root" password="123"
			loginTimeout="600000" />
	</ConnectionInfo>
		
    <Command name="users" SQL="select * from userinfo" kind="Select" />
	
</Config>

3：java代码

 

package com.waysoft.intergration.dao;

import java.io.InputStream;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.List;

import org.apache.tuscany.das.rdb.Command;
import org.apache.tuscany.das.rdb.DAS;

import commonj.sdo.DataObject;

public class CustomerClient {

	private DAS das = null;
	private final String configFile;

	public CustomerClient(String configFile) {
		this.configFile = configFile;
	}

	protected InputStream getConfig(String fileName) {
		return getClass().getClassLoader().getResourceAsStream(fileName);
	}

	protected DAS getDAS() {
		if (this.das == null) {
			this.das = DAS.FACTORY.createDAS(getConfig(this.configFile));
		}
		return this.das;
	}

	public final DataObject getRootObject() {
		Command read = this.getDAS().createCommand("select * from userinfo");
		DataObject root = read.executeQuery();
		return root;
	}

	public final List<?> getusers() {
		Command read = this.getDAS().createCommand("select * from userinfo");
		DataObject root = read.executeQuery();
		return root.getList("userinfo");
	}

	public final void addCustomer() {
		Command read = this.getDAS().getCommand("users");
		DataObject root = read.executeQuery();

		DataObject newUser = root.createDataObject("userinfo");
		newUser.setString("name", "chu");
		newUser.setInt("id", 3);
		newUser.setInt("age", 34);
		newUser.setString(
				"birth",
				DateFormat.getDateInstance().format(
						Calendar.getInstance().getTime()));
		das.applyChanges(root);
	}

	public final void deleteCustomer() {
		Command readAll = this.getDAS().getCommand("users");
		DataObject root = readAll.executeQuery();
		List<?> allusers = root.getList("userinfo");
		DataObject lastCustomer = (DataObject) allusers
				.get(allusers.size() - 1);
		if (lastCustomer != null) {
			System.out.println("Deleting user named: "
					+ lastCustomer.getString("name"));
			lastCustomer.delete();
		}
		das.applyChanges(root);
	}

	public final void changeFirstCustomerName() {
		Command readAll = this.getDAS().getCommand("users");
		DataObject root = readAll.executeQuery();

		DataObject firstCustomer = root.getDataObject("userinfo[1]");
		firstCustomer.set("name", "BlueBerry");

		das.applyChanges(root);
	}

	public static void printList(List<?> users) {
		for (int i = 0; i < users.size(); i++) {
			System.out.println(" name:"
					+ (((DataObject) users.get(i)).getString("name")) + " age:"
					+ (((DataObject) users.get(i)).getInt("id")) + " birth:"
					+ (((DataObject) users.get(i)).getString("birth")));
		}
	}

	public void releaseResources() {
		das.releaseResources();
	}

	public static void main(String[] args) {
		String customerConfigFile = "UsersConfig.xml";
		CustomerClient customerClient = new CustomerClient(customerConfigFile);
		// test select
		System.out.println();
		System.out.println("Result:select all users");
		printList(customerClient.getusers());
		// //test insert
		System.out.println();
		 System.out.println("Result:insert new userinfo");
		 customerClient.addCustomer();
		 printList(customerClient.getusers());

		// test update
		System.out.println();
		System.out.println("Result:update first userinfo");
		customerClient.changeFirstCustomerName();
		printList(customerClient.getusers());

		// test delete
		System.out.println();
		System.out.println("Result:delete last userinfo");
		customerClient.deleteCustomer();
		printList(customerClient.getusers());
	}
}

4：控制台输出

Result:select all users
 name:chu age:1 birth:2012-01-01

Result:insert new userinfo
 name:chu age:1 birth:2012-01-01
 name:chu age:3 birth:2012-12-13

Result:update first userinfo
 name:BlueBerry age:1 birth:2012-01-01
 name:chu age:3 birth:2012-12-13

Result:delete last userinfo
Deleting user named: chu
 name:BlueBerry age:1 birth:2012-01-01

5：查看数据库