课件课后练习代码-经典案例

JavaStruts器入门示NETCTOSS登录检查文件上1器入门示a.新建web工程struts03_3图-接口,实现约定的//在这里 StringretVal=return }importimportimportpublicclassSomeInterceptorimplementsInterceptorpublicvoiddestroy()publicvoidinit()publicStringintercept(ActionInvocationactionInvocation)throwsException{publicclassSomeActionpublicStringreturn"success";}}<?xmlversion="1.0"encoding="UTF-8"<!DOCTYPEstruts"-//ApacheSoftwareFoundation//DTDStrutsConfiguration"<packagename="day05"extends="struts-<interceptorclass="erceptor.SomeInterceptor"<action<interceptor-ref新建<%@pagelanguage="java"pageEncoding="UTF-<!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01图-图-importimportpublicclassSomeInterceptorimplementsInterceptorpublicvoiddestroy()publicvoidinit()publicStringintercept(ActionInvocationthrows{StringretVal=return}}publicclassSomeActionpublicStringreturn"success";}}<?xmlversion="1.0"encoding="UTF-8"<!DOCTYPEstruts"-//ApacheSoftwareFoundation//DTDStrutsConfiguration"<packagename="day05"extends="struts-<interceptorname="someInterceptor"class="erceptor.SomeInterceptor"/><action<interceptor-ref</package><%@pagelanguage="java"pageEncoding="UTF-<!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01在Day04“NETCTOSS资费更新”案例基础上，添加登录检查器功能。当用户没有登录的登录时需要将Day04的“基于streamResult生成”(struts04_1)案例的内容整合到图-

图- importimportimportpublicclassBaseActionimplementsprotectedMap<String,Object>protectedMap<String,Object>publicvoidsetSession(Map<String,Object>session)this.session=}publicvoidsetRequest(Map<String,Object>{this.request=}} <packagename="login"extends="struts-<!--登录处理<action<resultname="success">/WEB-<actionname="login"<resultname="success">/WEB-<resultname="login">/WEB-<actionname="image"<result<param</package>

图-图-publicclassLoginInterceptorInterceptorpublicStringintercept(ActionInvocationinvocation)throwsMap<String,Object>session=invocation.getInvocationContext().getif(session.get("user")==null){return}return}}<?xmlversion="1.0"encoding="UTF-<!DOCTYPEstruts"-//ApacheSoftwareFoundation//DTDStrutsConfiguration"<packagename="fee"extends="json-default"<interceptorname="checkLogin"<interceptor-stack<interceptor-ref<interceptor-ref<global-<resultname="login"<param<param</global-<!--资费处理<action<param<resultname="success">/WEB-<action<interceptor-ref<resultname="success"<action<action<result<param<actionname="fee_*"<interceptor-ref<resultname="success">/WEB-</package><packagename="login"extends="struts-default"><!--登录处理--><action<resultname="success">/WEB-<action<resultname="success">/WEB-<resultname="login">/WEB-<action<result<param测试，，如图-8所示图-图-图-图-importimportimportpublicclassBaseActionimplementsRequestAware,SessionAware{protectedprotectedMap<String,Object>publicvoidsetSession(Map<String,Object>{this.session=}publicvoidsetRequest(Map<String,Object>{this.request=}importimportimport publicclassLoginInterceptorextends{ pub if(session.get("user")==null){return}return}}<?xmlversion="1.0"encoding="UTF-<!DOCTYPEstruts"-//ApacheSoftwareFoundation//DTDStrutsConfiguration"<packagename="fee"extends="json-default"<interceptorname="checkLogin"<interceptor-stack<interceptor-ref<interceptor-ref<global-<resultname="login"<param<param</global-<!--资费处理--><action<param<resultname="success">/WEB-<action<interceptor-ref<resultname="success"<action<action<result<param<actionname="fee_*"<interceptor-ref<resultname="success">/WEB-</package><packagename="login"extends="struts-default"><!--登录处理--><action<resultname="success">/WEB-<action<resultname="success">/WEB-<resultname="login">/WEB-<action<result<param</package>准备好Struts2新建web工程图-在原有个包的基础上添 <%@pagepageEncoding="utf-<formaction="upload.action"method="post"<inputtype="file"<inputtype="submit"value="提交"publicclassBaseActionimplementsServletContextAwareprotectedServletContextpublicvoidsetServletContext(ServletContext{this.application=}//该方publicStringtoRealPath(String{return}}该器首先会调用commons-file-upload.jar组件将客户端上传的文件保存到服务器临时目录下,之后将临时下的文件对象给Action属性，当Action和Result调用完毕后,清除临时目录下的文件.因此在Action业务方法中,需要做文件,将临时文件转移到目标中。在这里使用importimportjava.io.BufferedOutputStream;importjava.io.File;importimportjava.io.FileOutputStream;importjava.io.IOException;publicclassFileUtil publicstaticbooleancopy(Filesrc,FileBufferedInputStreambis=BufferedOutputStreambos=trybis=newBufferedInputStream(newbos=newBufferedOutputStream(newbyte[]bts=newbyte[1024];intlen=-while((len=bis.read(bts))!=- return}catch(Exceptione)return}finally{if(bis!=null){try}catch(IOException{}}if(bos!=null){try}catch(IOException{}}}}}importimportpublicclassUploadActionextendsprivateFilesome;//privateStringsomeFileName;//原文件名privateStringsomeContentType;//原文件类型 privateStringimagePath;publicStringexecute()throwsException if(some==return StringimageName"file_"+ +* imagePath="upload/"+**StringrealImagePath=//从缓存 文FileUtil.copy(some,newFile(realImagePath)); return publicFilegetSome()return publicvoidsetSome(Filesome)this.some= publicStringgetSomeFileName()return publicvoidsetSomeFileName(StringsomeFileName)this.someFileName= publicStringgetSomeContentType()return publicvoidsetSomeContentType(StringsomeContentType)this.someContentType=}publicStringgetImagePath()return}publicvoidsetImagePath(StringimagePath)this.imagePath=}}<%@pagepageEncoding="utf-<%@tagliburi="/struts-tags"<imgsrc="${imagePath}"<%@pagepageEncoding="utf-<%@tagliburi="/struts-tags"文件上传失败，文件超大了。请<ahref="toUpload.action">重试测试，，如图-13所示图-

图-<param图-<%@pagepageEncoding="utf-<formaction="upload.action"method="post"<inputtype="file"<inputtype="submit"value="提交"publicclassBaseActionimplementsServletContextAwareprotectedServletContextpublicvoidsetServletContext(ServletContext{this.application=}publicStringtoRealPath(String{return}}importimportimportimportimportimportpublicclassFileUtilpublicstaticbooleancopy(Filesrc,FileBufferedInputStreambis=BufferedOutputStreambos=trybis=newBufferedInputStream(newbos=newBufferedOutputStream(newbyte[]bts=newbyte[1024];intlen=-while((len=bis.read(bts))!=- return}catch(Exceptione)return}finally{if(bis!=null){try}catch(IOException{}}if(bos!=null){try}catch(IOException{}}}}}importimportpublicclassUploadActionextendsprivateprivateprivateFilesome;StringsomeFileName;//原文件名StringsomeContentType;//原文件类型privateStringpublicStringexecute()throwsExceptionif(some== return StringimageName"file_"+ +* imageP