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摘自c3p0.jar，方便查看
//c3p0.properties
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//c3p0-config.xml
<c3p0-config>?
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//解析properties
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/*
*Distributedaspartofc3p0v.0.9.1.2**Copyright(C)2005MachineryForChange,Inc.**Author:SteveWaldman<swaldman@mchange.com>**Thislibraryisfreesoftware;youcanredistributeitand/ormodify*itunderthetermsoftheGNULesserGeneralPublicLicenseversion2.1,as*publishedbytheFreeSoftwareFoundation.**Thissoftwareisdistributedinthehopethatitwillbeuseful,*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe*GNULesserGeneralPublicLicenseformoredetails.**YoushouldhavereceivedacopyoftheGNULesserGeneralPublicLicense*alongwiththissoftware;seethefileLICENSE.Ifnot,writetothe*FreeSoftwareFoundation,Inc.,59TemplePlace,Suite330,*Boston,MA02111-1307,USA.
*/
packagecom.mchange.v2.c3p0.cfg;importjava.io.*;importjava.lang.reflect.*;importjava.util.*;importcom.mchange.v2.cfg.*;importcom.mchange.v2.log.*;importcom.mchange.v2.c3p0.impl.*;publicfinalclassC3P0ConfigUtils{publicfinalstaticStringPROPS_FILE_RSRC_PATH="/c3p0.properties";publicfinalstaticStringPROPS_FILE_PROP_PFX="c3p0.";publicfinalstaticintPROPS_FILE_PROP_PFX_LEN=5;
privatefinalstaticString[]MISSPELL_PFXS={"/c3pO","/c3po","/C3P0","/C3PO"};finalstaticMLoggerlogger=MLog.getLogger(C3P0ConfigUtils.class);static{if(logger.isLoggable(MLevel.WARNING)&&C3P0ConfigUtils.class.getResource(PROPS_FILE_RSRC_PATH)==null){//warnonamisspelling...itsanuglywaytodothis,butsinceresourcesarenotlistable...for(inti=0;i<MISSPELL_PFXS.length;++i){Stringtest=MISSPELL_PFXS[i]+".properties";if(C3P0ConfigUtils.class.getResource(MISSPELL_PFXS[i]+".properties")!=null){logger.warning("POSSIBLYMISSPELLEDc3p0.propertiesCONFIGRESOURCEFOUND."+"Pleaseensurethefilenameisc3p0.properties,alllowercase,"+"withthedigit0(NOTtheletterO)inc3p0.Itshouldbeplaced"+"inthetoplevelofc3p0'seffectiveclasspath.");break;
}}}}publicstaticHashMapextractHardcodedC3P0Defaults(booleanstringify){HashMapout=newHashMap();try{Method[]methods=C3P0Defaults.class.getMethods();for(inti=0,len=methods.length;i<len;++i){Methodm=methods[i];intmods=m.getModifiers();if((mods&Modifier.PUBLIC)!=0&&(mods&Modifier.STATIC)!=0&&m.getParameterTypes().length==0){if(stringify){Objectval=m.invoke(null,null);if(val!=null)out.put(m.getName(),String.valueOf(val));}elseout.put(m.getName(),m.invoke(null,null));}}}catch(Exceptione){logger.log(MLevel.WARNING,"Failedtoextracthardcodeddefaultconfig!?",e);}returnout;}publicstaticHashMapextractHardcodedC3P0Defaults(){returnextractHardcodedC3P0Defaults(true);}publicstaticHashMapextractC3P0PropertiesResources(){HashMapout=newHashMap();//Propertiesprops=findResourceProperties();//props.putAll(findAllC3P0Properties());Propertiesprops=findAllC3P0Properties();for(Iteratorii=props.keySet().iterator();ii.hasNext();){Stringkey=(String)ii.next();Stringval=(String)props.get(key);if(key.startsWith(PROPS_FILE_PROP_PFX))out.put(key.substring(PROPS_FILE_PROP_PFX_LEN).trim(),val.trim());}returnout;}publicstaticC3P0ConfigconfigFromFlatDefaults(HashMapflatDefaults){NamedScopedefaults=newNamedScope();defaults.props.putAll(flatDefaults);HashMapconfigNamesToNamedScopes=newHashMap();returnnewC3P0Config(defaults,configNamesToNamedScopes);}publicstaticStringgetPropFileConfigProperty(Stringprop){returnMultiPropertiesConfig.readVmConfig().getProperty(prop);}privatestaticPropertiesfindResourceProperties(){returnMultiPropertiesConfig.readVmConfig().getPropertiesByResourcePath(PROPS_FILE_RSRC_PATH);}privatestaticPropertiesfindAllC3P0Properties(){returnMultiPropertiesConfig.readVmConfig().getPropertiesByPrefix("c3p0");}staticPropertiesfindAllC3P0SystemProperties(){Propertiesout=newProperties();SecurityExceptionsampleExc=null;try{for(Iteratorii=C3P0Defaults.getKnownProperties().iterator();ii.hasNext();){Stringkey=(String)ii.next();StringprefixedKey="c3p0."+key;Stringvalue=System.getProperty(prefixedKey);if(value!=null&&value.trim().length()>0)out.put(key,value);}}catch(SecurityExceptione){sampleExc=e;}returnout;}privateC3P0ConfigUtils(){}}
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//解析xml
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/**Distributedaspartofc3p0v.0.9.1.2**Copyright(C)2005MachineryForChange,Inc.**Author:SteveWaldman<swaldman@mchange.com>**Thislibraryisfreesoftware;youcanredistributeitand/ormodify*itunderthetermsoftheGNULesserGeneralPublicLicenseversion2.1,as*publishedbytheFreeSoftwareFoundation.**Thissoftwareisdistributedinthehopethatitwillbeuseful,*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe*GNULesserGeneralPublicLicenseformoredetails.**YoushouldhavereceivedacopyoftheGNULesserGeneralPublicLicense*alongwiththissoftware;seethefileLICENSE.Ifnot,writetothe*FreeSoftwareFoundation,Inc.,59TemplePlace,Suite330,*Boston,MA02111-1307,USA.*/packagecom.mchange.v2.c3p0.cfg;importjava.io.*;importjava.util.*;importjavax.xml.parsers.*;importorg.w3c.dom.*;importcom.mchange.v2.log.*;importcom.mchange.v1.xml.DomParseUtils;publicfinalclassC3P0ConfigXmlUtils{publicfinalstaticStringXML_CONFIG_RSRC_PATH="/c3p0-config.xml";finalstaticMLoggerlogger=MLog.getLogger(C3P0ConfigXmlUtils.class);publicfinalstaticStringLINESEP;privatefinalstaticString[]MISSPELL_PFXS={"/c3p0","/c3pO","/c3po","/C3P0","/C3PO"};privatefinalstaticchar[]MISSPELL_LINES={'-','_'};privatefinalstaticString[]MISSPELL_CONFIG={"config","CONFIG"};privatefinalstaticString[]MISSPELL_XML={"xml","XML"};//itsanuglywaytodothis,butsinceresourcesarenotlistable...////thisisonlyexecutedonce,anddoesabout40tests(fornow)//shouldIcareaboutthecostininitializationtime?////shouldonlyberunifwe'vecheckedforthecorrectfile,but//notfounditprivatefinalstaticvoidwarnCommonXmlConfigResourceMisspellings(){if(logger.isLoggable(MLevel.WARNING)){for(inta=0,lena=MISSPELL_PFXS.length;a<lena;++a){StringBuffersb=newStringBuffer(16);sb.append(MISSPELL_PFXS[a]);for(intb=0,lenb=MISSPELL_LINES.length;b<lenb;++b){sb.append(MISSPELL_LINES[b]);for(intc=0,lenc=MISSPELL_CONFIG.length;c<lenc;++c){sb.append(MISSPELL_CONFIG[c]);sb.append('.');for(intd=0,lend=MISSPELL_XML.length;d<lend;++d){sb.append(MISSPELL_XML[d]);Stringtest=sb.toString();if(!test.equals(XML_CONFIG_RSRC_PATH)){ObjecthopefullyNull=C3P0ConfigXmlUtils.class.getResource(test);if(hopefullyNull!=null){logger.warning("POSSIBLYMISSPELLEDc3p0-conf.xmlRESOURCEFOUND."+"Pleaseensurethefilenameisc3p0-config.xml,alllowercase,"+"withthedigit0(NOTtheletterO)inc3p0.Itshouldbeplaced"+"inthetoplevelofc3p0'seffectiveclasspath.");return;}}}}}}}}static{Stringls;try{ls=System.getProperty("line.separator","");}catch(Exceptione){ls="";}LINESEP=ls;}publicstaticC3P0ConfigextractXmlConfigFromDefaultResource()throwsException{InputStreamis=null;try{is=C3P0ConfigUtils.class.getResourceAsStream(XML_CONFIG_RSRC_PATH);if(is==null){warnCommonXmlConfigResourceMisspellings();returnnull;}elsereturnextractXmlConfigFromInputStream(is);}finally{try{if(is!=null)is.close();}catch(Exceptione){if(logger.isLoggable(MLevel.FINE))logger.log(MLevel.FINE,"ExceptiononresourceInputStreamclose.",e);}}}publicstaticC3P0ConfigextractXmlConfigFromInputStream(InputStreamis)throwsException{DocumentBuilderFactoryfact=DocumentBuilderFactory.newInstance();DocumentBuilderdb=fact.newDocumentBuilder();Documentdoc=db.parse(is);returnextractConfigFromXmlDoc(doc);}publicstaticC3P0ConfigextractConfigFromXmlDoc(Documentdoc)throwsException{ElementdocElem=doc.getDocumentElement();if(docElem.getTagName().equals("c3p0-config")){NamedScopedefaults;HashMapconfigNamesToNamedScopes=newHashMap();ElementdefaultConfigElem=DomParseUtils.uniqueChild(docElem,"default-config");if(defaultConfigElem!=null)defaults=extractNamedScopeFromLevel(defaultConfigElem);elsedefaults=newNamedScope();NodeListnl=DomParseUtils.immediateChildElementsByTagName(docElem,"named-config");for(inti=0,len=nl.getLength();i<len;++i){ElementnamedConfigElem=(Element)nl.item(i);StringconfigName=namedConfigElem.getAttribute("name");if(configName!=null&&configName.length()>0){NamedScopenamedConfig=extractNamedScopeFromLevel(namedConfigElem);configNamesToNamedScopes.put(configName,namedConfig);}elselogger.warning("ConfigurationXMLcontainednamed-configelementwithoutnameattribute:"+namedConfigElem);}returnnewC3P0Config(defaults,configNamesToNamedScopes);}elsethrownewException("Rootelementofc3p0configxmlshouldbe'c3p0-config',not'"+docElem.getTagName()+"'.");}privatestaticNamedScopeextractNamedScopeFromLevel(Elementelem){HashMapprops=extractPropertiesFromLevel(elem);HashMapuserNamesToOverrides=newHashMap();NodeListnl=DomParseUtils.immediateChildElementsByTagName(elem,"user-overrides");for(inti=0,len=nl.getLength();i<len;++i){ElementperUserConfigElem=(Element)nl.item(i);StringuserName=perUserConfigElem.getAttribute("user");if(userName!=null&&userName.length()>0){HashMapuserProps=extractPropertiesFromLevel(perUserConfigElem);userNamesToOverrides.put(userName,userProps);}elselogger.warning("ConfigurationXMLcontaineduser-overrideselementwithoutuserattribute:"+LINESEP+perUserConfigElem);}returnnewNamedScope(props,userNamesToOverrides);}privatestaticHashMapextractPropertiesFromLevel(Elementelem){//System.err.println("extractPropertiesFromLevel()");HashMapout=newHashMap();try{NodeListnl=DomParseUtils.immediateChildElementsByTagName(elem,"property");intlen=nl.getLength();for(inti=0;i<len;++i){ElementpropertyElem=(Element)nl.item(i);StringpropName=propertyElem.getAttribute("name");if(propName!=null&&propName.length()>0){StringpropVal=DomParseUtils.allTextFromElement(propertyElem,true);out.put(propName,propVal);//System.err.println(propName+"->"+propVal);}elselogger.warning("ConfigurationXMLcontainedpropertyelementwithoutnameattribute:"+LINESEP+propertyElem);}}catch(Exceptione){logger.log(MLevel.WARNING,"AnexceptionoccurredwhilereadingconfigXML."+"Someconfigurationinformationhasprobablybeenignored.",e);}returnout;}privateC3P0ConfigXmlUtils(){}}
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/**Distributedaspartofc3p0v.0.9.1.2**Copyright(C)2005MachineryForChange,Inc.**Author:SteveWaldman<swaldman@mchange.com>**Thislibraryisfreesoftware;youcanredistributeitand/ormodify*itunderthetermsoftheGNULesserGeneralPublicLicenseversion2.1,as*publishedbytheFreeSoftwareFoundation.**Thissoftwareisdistributedinthehopethatitwillbeuseful,*butWITHOUTANYWARRANTY;withouteventheimpliedwarrantyof*MERCHANTABILITYorFITNESSFORAPARTICULARPURPOSE.Seethe*GNULesserGeneralPublicLicenseformoredetails.**YoushouldhavereceivedacopyoftheGNULesserGeneralPublicLicense*alongwiththissoftware;seethefileLICENSE.Ifnot,writetothe*FreeSoftwareFoundation,Inc.,59TemplePlace,Suite330,*Boston,MA02111-1307,USA.*/packagecom.mchange.v1.xml;importjava.util.*;importorg.xml.sax.*;importorg.w3c.dom.*;importcom.mchange.v1.util.DebugUtils;publicfinalclassDomParseUtils{finalstaticbooleanDEBUG=true;/***@returnnullifchilddoesn'texist.*/publicstaticStringallTextFromUniqueChild(Elementelem,StringchildTagName)throwsDOMException{returnallTextFromUniqueChild(elem,childTagName,false);}/***@returnnullifchilddoesn'texist.*/publicstaticStringallTextFromUniqueChild(Elementelem,StringchildTagName,booleantrim)throwsDOMException{ElementuniqueChild=uniqueChildByTagName(elem,childTagName);if(uniqueChild==null)returnnull;elsereturnDomParseUtils.allTextFromElement(uniqueChild,trim);}publicstaticElementuniqueChild(Elementelem,StringchildTagName)throwsDOMException{returnuniqueChildByTagName(elem,childTagName);}/***@deprecateduseuniqueChild(Elementelem,StringchildTagName)*/publicstaticElementuniqueChildByTagName(Elementelem,StringchildTagName)throwsDOMException{NodeListnl=elem.getElementsByTagName(childTagName);intlen=nl.getLength();if(DEBUG)DebugUtils.myAssert(len<=1,"Thereismorethanone("+len+")childwithtagname:"+childTagName+"!!!");return(len==1?(Element)nl.item(0):null);}publicstaticStringallText(Elementelem)throwsDOMException{returnallTextFromElement(elem);}publicstaticStringallText(Elementelem,booleantrim)throwsDOMException{returnallTextFromElement(elem,trim);}/**@deprecateduseallText(Elementelem)*/publicstaticStringallTextFromElement(Elementelem)throwsDOMException{returnallTextFromElement(elem,false);}/**@deprecateduseallText(Elementelem,booleantrim)*/publicstaticStringallTextFromElement(Elementelem,booleantrim)throwsDOMException{StringBuffertextBuf=newStringBuffer();NodeListnl=elem.getChildNodes();for(intj=0,len=nl.getLength();j<len;++j){Nodenode=nl.item(j);if(nodeinstanceofText)//includesTextandCDATA!textBuf.append(node.getNodeValue());}Stringout=textBuf.toString();return(trim?out.trim():out);}publicstaticString[]allTextFromImmediateChildElements(Elementparent,StringtagName)throwsDOMException{returnallTextFromImmediateChildElements(parent,tagName,false);}publicstaticString[]allTextFromImmediateChildElements(Elementparent,StringtagName,booleantrim)throwsDOMException{NodeListnl=immediateChildElementsByTagName(parent,tagName);intlen=nl.getLength();String[]out=newString[len];for(inti=0;i<len;++i)out[i]=allText((Element)nl.item(i),trim);returnout;}publicstaticNodeListimmediateChildElementsByTagName(Elementparent,StringtagName)throwsDOMException{returngetImmediateChildElementsByTagName(parent,tagName);}/***@deprecateduseimmediateChildrenByTagName(Elementparent,StringtagName)*/publicstaticNodeListgetImmediateChildElementsByTagName(Elementparent,StringtagName)throwsDOMException{finalListnodes=newArrayList();for(Nodechild=parent.getFirstChild();child!=null;child=child.getNextSibling())if(childinstanceofElement&&((Element)child).getTagName().equals(tagName))nodes.add(child);returnnewNodeList(){publicintgetLength(){returnnodes.size();}publicNodeitem(inti){return(Node)nodes.get(i);}};}publicstaticStringallTextFromUniqueImmediateChild(Elementelem,StringchildTagName)throwsDOMException{ElementuniqueChild=uniqueImmediateChildByTagName(elem,childTagName);if(uniqueChild==null)returnnull;returnDomParseUtils.allTextFromElement(uniqueChild);}publicstaticElementuniqueImmediateChild(Elementelem,StringchildTagName)throwsDOMException{returnuniqueImmediateChildByTagName(elem,childTagName);}/***@deprecateduseuniqueImmediateChild(Elementelem,StringchildTagName)*/publicstaticElementuniqueImmediateChildByTagName(Elementelem,StringchildTagName)throwsDOMException{NodeListnl=getImmediateChildElementsByTagName(elem,childTagName);intlen=nl.getLength();if(DEBUG)DebugUtils.myAssert(len<=1,"Thereismorethanone("+len+")childwithtagname:"+childTagName+"!!!");return(len==1?(Element)nl.item(0):null);}/***@deprecateduseElement.getAttribute(Stringval)*/publicstaticStringattrValFromElement(Elementelement,StringattrName)throwsDOMException{Attrattr=element.getAttributeNode(attrName);return(attr==null?null:attr.getValue());}privateDomParseUtils(){}}
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