oracle19c方言,JFinal框架操作oracle数据库
JFinal框架操作oracle數(shù)據(jù)庫,需要在configPlugin()方法中配置鏈接oracle數(shù)據(jù)庫的相關(guān)配置
配置JFinal數(shù)據(jù)庫操作插件,configPlugin方法
這里我加載jdbc.properties配置文件實(shí)在configConstant加載的
@Override
public?void?configConstant(Constants?me)?{
loadPropertyFile("jdbc.properties");//加載配置文件
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=newDruidPlugin(url,?username,?password,?driver);
me.add(dp);
arp=newActiveRecordPlugin(dp);//設(shè)置數(shù)據(jù)庫方言
arp.setDialect(new?OracleDialect());
arp.setContainerFactory(new?CaseInsensitiveContainerFactory());//忽略大小寫
me.add(new?EhCachePlugin());
arp.addMapping("users",?"id",Users.class);
me.add(arp);
}
需要注意一點(diǎn)的是,由于oracle數(shù)據(jù)庫中在創(chuàng)建表時(shí),會(huì)自動(dòng)的將所有的字段自動(dòng)轉(zhuǎn)為大寫,因此在避免后面操作的時(shí)候出現(xiàn)大小寫錯(cuò)誤的相關(guān)異常,這里需要配置忽略大小寫的功能
arp.setContainerFactory(new?CaseInsensitiveContainerFactory());//忽略大小寫
如果不需要對(duì)數(shù)據(jù)庫進(jìn)行增加操作,則必須配置忽略大小寫,如果不配置忽略大小寫,在保存源代碼的該段代碼中會(huì)出現(xiàn)屬性id找不到的異常
/**
*?Save?model.
*/
public?boolean?save()?{
Config?config=getConfig();
Table?table=getTable();
StringBuilder?sql=newStringBuilder();
Listparas=newArrayList();
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();
getGeneratedKey(pst,?table);//如果不配置忽略大小寫,執(zhí)行到這里會(huì)出現(xiàn)異常,雖然可以添加到數(shù)據(jù)庫,但是這里報(bào)錯(cuò),界面還是會(huì)顯示500錯(cuò)誤
getModifyFlag().clear();
return?result?>=?1;
}?catch?(Exception?e)?{
throw?new?ActiveRecordException(e);
}?finally?{
config.close(pst,?conn);
}
getGeneratedKey()源代碼部分
/**
*?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()源代碼部分
/**
*?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)?{
if?(getTable().hasColumnLabel(attr))?{//執(zhí)行到這里返回false
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);//拋出該異常
}
現(xiàn)在來說說如果不配置,為什么會(huì)出現(xiàn) The attribute name is not exists:這個(gè)異常,這是因?yàn)閛racle中的字段是大寫的,而set方法中傳入的attr屬性的值是小寫,而getTable()中的屬性對(duì)應(yīng)的就是oracle字段,這些屬性則是大寫,因此這里使用getTable().hasColumnLabel(attr)判斷是否存在該字段,就會(huì)找不到,這時(shí)就會(huì)拋出該異常,因此就必須配置忽略大小寫的方法,就不會(huì)出現(xiàn)該異常
實(shí)體類:
package?com.tenghu.core.model;
import?com.jfinal.plugin.activerecord.Model;
public?class?Users?extends?Model{
public?static?Users?dao=newUsers();
}
操作數(shù)據(jù):
Usersusers=newUsers();
users.set("id",?"users_sequence.nextval");
users.set("username",?"張三");
users.set("pwd",?"sdfsdfs");
users.save();
ListtestList=Users.dao.find("select?*?from?users");
這里就完成了JFinal框架操作oracle數(shù)據(jù)庫,刪除和修改就自己去測(cè)試了
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