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");
