JFinalo操作框架racle数据库

JFinal操作框架oracle数据库。在需求configPlugin()方法来配置链路oracle配置数据库

组态JFinal数据库操作窗口小部件，configPlugin方法

在这里，我打开jdbc.properties它分析configConstant载入的

@Override
	public void configConstant(Constants me) {
		loadPropertyFile("jdbc.properties");//载入配置文件
		me.setDevMode(getPropertyToBoolean("config.devModel", false));
		me.setViewType(ViewType.JSP);
		me.setEncoding("UTF-8");
	}

jdbc.properites配置文件

oracle.driver=oracle.jdbc.driver.OracleDriver
oracle.url=jdbc:oracle:thin:@127.0.0.1:1521:orcl
oracle.username=scott
oracle.password=xiaohu

config.devModel=true

@Override
	public void configPlugin(Plugins me) {
		ActiveRecordPlugin arp=null;
		String driver=getProperty("oracle.driver");
		String url=getProperty("oracle.url");
		String username=getProperty("oracle.username");
		String password=getProperty("oracle.password");
		DruidPlugin dp=new DruidPlugin(url, username, password, driver);
		me.add(dp);
		arp=new ActiveRecordPlugin(dp);//设置数据库方言
		arp.setDialect(new OracleDialect());
		arp.setContainerFactory(new CaseInsensitiveContainerFactory());//忽略大写和小写
		me.add(new EhCachePlugin());
		arp.addMapping("users", "id",Users.class);
		me.add(arp);
	}

须要注意一点的是，因为oracle数据库中在创建表时。会自己主动的将全部的字段自己主动转为大写。因此在避免后面操作的时候出现大写和小写错误的相关异常，这里须要配置忽略大写和小写的功能

arp.setContainerFactory(new CaseInsensitiveContainerFactory());//忽略大写和小写

假设不须要对数据库进行添加操作。则必须配置忽略大写和小写。假设不配置忽略大写和小写，在保存源码的该段代码中会出现属性id找不到的异常

/**
	 * Save model.
	 */
	public boolean save() {
		Config config = getConfig();
		Table table = getTable();
		
		StringBuilder sql = new StringBuilder();
		List<Object> paras = new ArrayList<Object>();
		config.dialect.forModelSave(table, attrs, sql, paras);
		// if (paras.size() == 0)	return false;	// The sql "insert into tableName() values()" works fine, so delete this line
		
		// --------
		Connection conn = null;
		PreparedStatement pst = null;
		int result = 0;
		try {
			conn = config.getConnection();
			if (config.dialect.isOracle())
				pst = conn.prepareStatement(sql.toString(), new String[]{table.getPrimaryKey()});
			else
				pst = conn.prepareStatement(sql.toString(), Statement.RETURN_GENERATED_KEYS);
			
			config.dialect.fillStatement(pst, paras);
			result = pst.executeUpdate();
			<span style="color:#ff0000;">getGeneratedKey(pst, table);//假设不配置忽略大写和小写。运行到这里会出现异常，尽管能够加入到数据库，可是这里报错。界面还是会显示500错误</span>

			getModifyFlag().clear();
			return result >= 1;
		} catch (Exception e) {
			throw new ActiveRecordException(e);
		} finally {
			config.close(pst, conn);
		}
	}

<span style="color:#ff0000;">getGeneratedKey（）源码部分</span>

/**
	 * Get id after save method.
	 */
	private void getGeneratedKey(PreparedStatement pst, Table table) throws SQLException {
		String pKey = table.getPrimaryKey();
		if (get(pKey) == null || getConfig().dialect.isOracle()) {
			ResultSet rs = pst.getGeneratedKeys();
			if (rs.next()) {
				Class colType = table.getColumnType(pKey);
				if (colType == Integer.class || colType == int.class)
					set(pKey, rs.getInt(1));
				else if (colType == Long.class || colType == long.class)
					set(pKey, rs.getLong(1));
				else
					set(pKey, rs.getObject(1));		// It returns Long object for int colType
				rs.close();
			}
		}
	}

set（）源码部分

/**
	 * Set attribute to model.
	 * @param attr the attribute name of the model
	 * @param value the value of the attribute
	 * @return this model
	 * @throws ActiveRecordException if the attribute is not exists of the model
	 */
	public M set(String attr, Object value) {
		<span style="color:#ff0000;">if (getTable().hasColumnLabel(attr)) {//运行到这里返回false</span>
			attrs.put(attr, value);
			getModifyFlag().add(attr);	// Add modify flag, update() need this flag.
			return (M)this;
		}
		throw new ActiveRecordException("The attribute name is not exists: " + attr);//抛出该异常
	}

如今来说说假设不配置，为什么会出现 The attribute name is not exists:这个异常，这是由于oracle中的字段是大写的，而set方法中传入的attr属性的值是小写，而getTable()中的属性相应的就是oracle字段。这些属性则是大写。因此这里使用getTable().hasColumnLabel(attr)推断是否存在该字段，就会找不到，这时就会抛出该异常，因此就必须配置忽略大写和小写的方法，就不会出现该异常

实体类：

package com.tenghu.core.model;

import com.jfinal.plugin.activerecord.Model;

public class Users extends Model<Users>{
	public static Users dao=new Users();
}

操作数据：

Users users=new Users();
users.set("id", "users_sequence.nextval");
users.set("username", "张三");
users.set("pwd", "sdfsdfs");
users.save();
List<Users> testList=Users.dao.find("select * from users");

在这里完成JFinal操作框架oracle数据库，删除和更改自己的测试