velocity学习笔记

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1、2014年12月15日星期一-velocity1、新建一个java工程，将velocity的jar包添加进编译路径，包括velocity-1.7.jar和lib中的所有jar包2、给出模板文件：hellovelocity.vm#foreach($namein$list)$nameisfun!#end3、给出我的测试类，将模板文件放在项目根目录下。packagetest;importjava.io.BufferedWriter;importjava.io.OutputStrea

2、mWriter;importjava.util.ArrayList;importorg.apache.velocity.Template;importorg.apache.velocity.VelocityContext;importorg.apache.velocity.app.Velocity;importorg.apache.velocity.exception.ParseErrorException;importorg.apache.velocity.exception.ResourceNotFoundException;publicclassHelloVeloc

3、ity{publicHelloVelocity(StringtemplateFile){try{Velocity.init();12/**Makeacontextobjectandpopulatewiththedata.Thisiswhere*theVelocityenginegetsthedatatoresolvethereferences(ex.*$list)inthetemplate*/VelocityContextcontext=newVelocityContext();context.put("list",getNames());/**gettheTemplat

4、eobject.Thisistheparsedversionofyour*templateinputfile.NotethatgetTemplate()canthrow*ResourceNotFoundException:ifitdoesn'tfindthetemplate*ParseErrorException:ifthereissomethingwrongwiththeVTL*Exception:ifsomethingelsegoeswrong(thisisgenerally*indicativeofasseriousproblem...)*/Templatetemp

5、late=null;try{template=Velocity.getTemplate(templateFile);}catch(ResourceNotFoundExceptionrnfe){rnfe.printStackTrace();System.out.println("Example:error:cannotfindtemplate"+templateFile);}catch(ParseErrorExceptionpee){pee.printStackTrace();System.out.println("Example:Syntaxerrorintemplate

6、"+templateFile+":"+pee);}/**Nowhavethetemplateengineprocessyourtemplateusingthedata*placedintothecontext.Thinkofitasa'merge'ofthetemplate*andthedatatoproducetheoutputstream.*/12BufferedWriterwriter=writer=newBufferedWriter(newOutputStreamWriter(System.out));if(template!=null)template.merg

7、e(context,writer);/**flushandcleanup*/writer.flush();writer.close();}catch(Exceptione){System.out.println(e);}}publicArrayListgetNames(){ArrayListlist=newArrayList();list.add("HelloVelocity1");list.add("HelloVelocity2");list.add("HelloVelocity3");list.add("HelloVelo