关于Spring MVC中 model.addAttribute()和request.setAttribute()的区别的问题

最新推荐文章于 2024-10-09 16:00:54 发布
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#HttpServletRequest #Model #model.addAttribute() #request.setAttribute() #model和request的区别

本文通过一个具体的案例展示了如何在Spring MVC中使用HttpServletRequest传递参数，并对比了使用Model进行参数传递的方法。通过前后端交互的输出结果，揭示了两种方式的不同表现。

这是用HttpServletRequest传递参数的Controller代码

@RequestMapping(value="/findalltradingrecord")
	public String findWorklogByUserId(PageUtil<TradingRecord> pageUtil,HttpServletRequest request){
		
		
		if (pageUtil==null||pageUtil.getCurrentPage()==0){ 
			pageUtil=new PageUtil<TradingRecord>(1, 20);
			pageUtil.setT(new TradingRecord());
		}
		try {
			tradingRecordService.findTradingRecordByPage(pageUtil);
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		System.out.println("pageUtil========"+pageUtil.toString());
		request.setAttribute("pageUtil", pageUtil);
		System.out.println("request中取出的========"+((PageUtil)request.getAttribute("pageUtil")).toString());
		return "tradingrecord/trading_record";
	}

这是控制台的输出信息不为空

pageUtil========PageUtil [currentPage=1, pageSize=20, totalCounts=4, totalPages=1, list=[TradingRecord [tradingRecordId=3, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:43 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordPayer=Student [stuId=10, stuName=zhanghaofeng, stuSex=男, stuAge=null, stuPosition=20180426, degree=18403, stuMajor=的说法, idCard=, companyPhone=, stuPhone=, fax=, qqEmail=, email=, address=, examAddress=啊撒地方, examType=201825, examTime=Wed Jul 18 00:00:00 CST 2018, stuAppraiser=33, stuApprover=33, appraiserId=null, approverId=cepo.resource.pool.birdlib.tradingrecord.bean.Approver@2fc16a1f, examTypeId=null, positionId=null, degreeId=null, companyId=null, postCode=, start=null, size=null, firstCardDate=null, electronicAudit=合格, paperReview=合格, payee=, aggregateAmount=null, receivableAmount=null, receivableDate=null, payer=, invoiceDate=null, invoiceCard=, invoiceContent=, invoiceType=测评专票, invoicePostdate=Tue Jul 03 00:00:00 CST 2018, invoicePostnumber=, invoiceSign=否, pinyin=123456,,, registrationType=, certificateNumber=, maintainPeriod=, maintainTimes=, maintainBatch=, newMaintainPeriod=, newCertificatePostdate=Tue Jul 17 00:00:00 CST 2018, newCertificatePostnumber=, certificateSign=是, note=, specialcase=, maintainDate=null], tradingRecordAmount=3333.0, tradingRecordCreateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordCreateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordUpdateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordUpdateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordDetail=aaaaaaaaaaaaaaaaaaaaaaaa, tradingRecordDeleteFlag=0], TradingRecord [tradingRecordId=4, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:43 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordPayer=Student [stuId=10, stuName=zhanghaofeng, stuSex=男, stuAge=null, stuPosition=20180426, degree=18403, stuMajor=的说法, idCard=, companyPhone=, stuPhone=, fax=, qqEmail=, email=, address=, examAddress=啊撒地方, examType=201825, examTime=Wed Jul 18 00:00:00 CST 2018, stuAppraiser=33, stuApprover=33, appraiserId=null, approverId=cepo.resource.pool.birdlib.tradingrecord.bean.Approver@2b7f7989, examTypeId=null, positionId=null, degreeId=null, companyId=null, postCode=, start=null, size=null, firstCardDate=null, electronicAudit=合格, paperReview=合格, payee=, aggregateAmount=null, receivableAmount=null, receivableDate=null, payer=, invoiceDate=null, invoiceCard=, invoiceContent=, invoiceType=测评专票, invoicePostdate=Tue Jul 03 00:00:00 CST 2018, invoicePostnumber=, invoiceSign=否, pinyin=123456,,, registrationType=, certificateNumber=, maintainPeriod=, maintainTimes=, maintainBatch=, newMaintainPeriod=, newCertificatePostdate=Tue Jul 17 00:00:00 CST 2018, newCertificatePostnumber=, certificateSign=是, note=, specialcase=, maintainDate=null], tradingRecordAmount=3333.0, tradingRecordCreateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordCreateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordUpdateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordUpdateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordDetail=aaaaaaaaaaaaaaaaaaaaaaaa, tradingRecordDeleteFlag=0], TradingRecord [tradingRecordId=2, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:42 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordPayer=Student [stuId=10, stuName=zhanghaofeng, stuSex=男, stuAge=null, stuPosition=20180426, degree=18403, stuMajor=的说法, idCard=, companyPhone=, stuPhone=, fax=, qqEmail=, email=, address=, examAddress=啊撒地方, examType=201825, examTime=Wed Jul 18 00:00:00 CST 2018, stuAppraiser=33, stuApprover=33, appraiserId=null, approverId=cepo.resource.pool.birdlib.tradingrecord.bean.Approver@1f7b7380, examTypeId=null, positionId=null, degreeId=null, companyId=null, postCode=, start=null, size=null, firstCardDate=null, electronicAudit=合格, paperReview=合格, payee=, aggregateAmount=null, receivableAmount=null, receivableDate=null, payer=, invoiceDate=null, invoiceCard=, invoiceContent=, invoiceType=测评专票, invoicePostdate=Tue Jul 03 00:00:00 CST 2018, invoicePostnumber=, invoiceSign=否, pinyin=123456,,, registrationType=, certificateNumber=, maintainPeriod=, maintainTimes=, maintainBatch=, newMaintainPeriod=, newCertificatePostdate=Tue Jul 17 00:00:00 CST 2018, newCertificatePostnumber=, certificateSign=是, note=, specialcase=, maintainDate=null], tradingRecordAmount=3333.0, tradingRecordCreateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordCreateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordUpdateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordUpdateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordDetail=aaaaaaaaaaaaaaaaaaaaaaaa, tradingRecordDeleteFlag=0], TradingRecord [tradingRecordId=1, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:37 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordPayer=Student [stuId=10, stuName=zhanghaofeng, stuSex=男, stuAge=null, stuPosition=20180426, degree=18403, stuMajor=的说法, idCard=, companyPhone=, stuPhone=, fax=, qqEmail=, email=, address=, examAddress=啊撒地方, examType=201825, examTime=Wed Jul 18 00:00:00 CST 2018, stuAppraiser=33, stuApprover=33, appraiserId=null, approverId=cepo.resource.pool.birdlib.tradingrecord.bean.Approver@4974f9a1, examTypeId=null, positionId=null, degreeId=null, companyId=null, postCode=, start=null, size=null, firstCardDate=null, electronicAudit=合格, paperReview=合格, payee=, aggregateAmount=null, receivableAmount=null, receivableDate=null, payer=, invoiceDate=null, invoiceCard=, invoiceContent=, invoiceType=测评专票, invoicePostdate=Tue Jul 03 00:00:00 CST 2018, invoicePostnumber=, invoiceSign=否, pinyin=123456,,, registrationType=, certificateNumber=, maintainPeriod=, maintainTimes=, maintainBatch=, newMaintainPeriod=, newCertificatePostdate=Tue Jul 17 00:00:00 CST 2018, newCertificatePostnumber=, certificateSign=是, note=, specialcase=, maintainDate=null], tradingRecordAmount=3333.0, tradingRecordCreateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordCreateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordUpdateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordUpdateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordDetail=aaaaaaaaaaaaaaaaaaaaaaaa, tradingRecordDeleteFlag=0]], t=TradingRecord [tradingRecordId=null, tradingRecordName=null, tradingRecordTime=null, tradingRecordPayee=null, tradingRecordPayer=null, tradingRecordAmount=null, tradingRecordCreateTime=null, tradingRecordCreateBy=null, tradingRecordUpdateTime=null, tradingRecordUpdateBy=null, tradingRecordDetail=null, tradingRecordDeleteFlag=null]]
request中取出的========PageUtil [currentPage=1, pageSize=20, totalCounts=4, totalPages=1, list=[TradingRecord [tradingRecordId=3, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:43 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordPayer=Student [stuId=10, stuName=zhanghaofeng, stuSex=男, stuAge=null, stuPosition=20180426, degree=18403, stuMajor=的说法, idCard=, companyPhone=, stuPhone=, fax=, qqEmail=, email=, address=, examAddress=啊撒地方, examType=201825, examTime=Wed Jul 18 00:00:00 CST 2018, stuAppraiser=33, stuApprover=33, appraiserId=null, approverId=cepo.resource.pool.birdlib.tradingrecord.bean.Approver@2fc16a1f, examTypeId=null, positionId=null, degreeId=null, companyId=null, postCode=, start=null, size=null, firstCardDate=null, electronicAudit=合格, paperReview=合格, payee=, aggregateAmount=null, receivableAmount=null, receivableDate=null, payer=, invoiceDate=null, invoiceCard=, invoiceContent=, invoiceType=测评专票, invoicePostdate=Tue Jul 03 00:00:00 CST 2018, invoicePostnumber=, invoiceSign=否, pinyin=123456,,, registrationType=, certificateNumber=, maintainPeriod=, maintainTimes=, maintainBatch=, newMaintainPeriod=, newCertificatePostdate=Tue Jul 17 00:00:00 CST 2018, newCertificatePostnumber=, certificateSign=是, note=, specialcase=, maintainDate=null], tradingRecordAmount=3333.0, tradingRecordCreateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordCreateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordUpdateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordUpdateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordDetail=aaaaaaaaaaaaaaaaaaaaaaaa, tradingRecordDeleteFlag=0], TradingRecord [tradingRecordId=4, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:43 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordPayer=Student [stuId=10, stuName=zhanghaofeng, stuSex=男, stuAge=null, stuPosition=20180426, degree=18403, stuMajor=的说法, idCard=, companyPhone=, stuPhone=, fax=, qqEmail=, email=, address=, examAddress=啊撒地方, examType=201825, examTime=Wed Jul 18 00:00:00 CST 2018, stuAppraiser=33, stuApprover=33, appraiserId=null, approverId=cepo.resource.pool.birdlib.tradingrecord.bean.Approver@2b7f7989, examTypeId=null, positionId=null, degreeId=null, companyId=null, postCode=, start=null, size=null, firstCardDate=null, electronicAudit=合格, paperReview=合格, payee=, aggregateAmount=null, receivableAmount=null, receivableDate=null, payer=, invoiceDate=null, invoiceCard=, invoiceContent=, invoiceType=测评专票, invoicePostdate=Tue Jul 03 00:00:00 CST 2018, invoicePostnumber=, invoiceSign=否, pinyin=123456,,, registrationType=, certificateNumber=, maintainPeriod=, maintainTimes=, maintainBatch=, newMaintainPeriod=, newCertificatePostdate=Tue Jul 17 00:00:00 CST 2018, newCertificatePostnumber=, certificateSign=是, note=, specialcase=, maintainDate=null], tradingRecordAmount=3333.0, tradingRecordCreateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordCreateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordUpdateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordUpdateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordDetail=aaaaaaaaaaaaaaaaaaaaaaaa, tradingRecordDeleteFlag=0], TradingRecord [tradingRecordId=2, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:42 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordPayer=Student [stuId=10, stuName=zhanghaofeng, stuSex=男, stuAge=null, stuPosition=20180426, degree=18403, stuMajor=的说法, idCard=, companyPhone=, stuPhone=, fax=, qqEmail=, email=, address=, examAddress=啊撒地方, examType=201825, examTime=Wed Jul 18 00:00:00 CST 2018, stuAppraiser=33, stuApprover=33, appraiserId=null, approverId=cepo.resource.pool.birdlib.tradingrecord.bean.Approver@1f7b7380, examTypeId=null, positionId=null, degreeId=null, companyId=null, postCode=, start=null, size=null, firstCardDate=null, electronicAudit=合格, paperReview=合格, payee=, aggregateAmount=null, receivableAmount=null, receivableDate=null, payer=, invoiceDate=null, invoiceCard=, invoiceContent=, invoiceType=测评专票, invoicePostdate=Tue Jul 03 00:00:00 CST 2018, invoicePostnumber=, invoiceSign=否, pinyin=123456,,, registrationType=, certificateNumber=, maintainPeriod=, maintainTimes=, maintainBatch=, newMaintainPeriod=, newCertificatePostdate=Tue Jul 17 00:00:00 CST 2018, newCertificatePostnumber=, certificateSign=是, note=, specialcase=, maintainDate=null], tradingRecordAmount=3333.0, tradingRecordCreateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordCreateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordUpdateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordUpdateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordDetail=aaaaaaaaaaaaaaaaaaaaaaaa, tradingRecordDeleteFlag=0], TradingRecord [tradingRecordId=1, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:37 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordPayer=Student [stuId=10, stuName=zhanghaofeng, stuSex=男, stuAge=null, stuPosition=20180426, degree=18403, stuMajor=的说法, idCard=, companyPhone=, stuPhone=, fax=, qqEmail=, email=, address=, examAddress=啊撒地方, examType=201825, examTime=Wed Jul 18 00:00:00 CST 2018, stuAppraiser=33, stuApprover=33, appraiserId=null, approverId=cepo.resource.pool.birdlib.tradingrecord.bean.Approver@4974f9a1, examTypeId=null, positionId=null, degreeId=null, companyId=null, postCode=, start=null, size=null, firstCardDate=null, electronicAudit=合格, paperReview=合格, payee=, aggregateAmount=null, receivableAmount=null, receivableDate=null, payer=, invoiceDate=null, invoiceCard=, invoiceContent=, invoiceType=测评专票, invoicePostdate=Tue Jul 03 00:00:00 CST 2018, invoicePostnumber=, invoiceSign=否, pinyin=123456,,, registrationType=, certificateNumber=, maintainPeriod=, maintainTimes=, maintainBatch=, newMaintainPeriod=, newCertificatePostdate=Tue Jul 17 00:00:00 CST 2018, newCertificatePostnumber=, certificateSign=是, note=, specialcase=, maintainDate=null], tradingRecordAmount=3333.0, tradingRecordCreateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordCreateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordUpdateTime=Wed Sep 05 00:00:00 CST 2018, tradingRecordUpdateBy=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, password=928bfd2577490322a6e19b793691467e], tradingRecordDetail=aaaaaaaaaaaaaaaaaaaaaaaa, tradingRecordDeleteFlag=0]], t=TradingRecord [tradingRecordId=null, tradingRecordName=null, tradingRecordTime=null, tradingRecordPayee=null, tradingRecordPayer=null, tradingRecordAmount=null, tradingRecordCreateTime=null, tradingRecordCreateBy=null, tradingRecordUpdateTime=null, tradingRecordUpdateBy=null, tradingRecordDetail=null, tradingRecordDeleteFlag=null]]

这是前端js代码 

function test(){
	var test="<c:out value='${pageUtil}'/>";
	var testPage="<c:out value='${pageScope.pageUtil}'/>";
	var testRequest="<c:out value='${reqeustScope.pageUtil}'/>";
	var testSession="<c:out value='${sessionScope.pageUtil}'/>";
	var testApplication="<c:out value='${applicationScope.pageUtil}'/>";
	
	console.log(test);
	console.log(testPage);
	console.log(testRequest);
	console.log(testSession);
	console.log(testApplication);
	
}

前端输出结果为

PageUtil [currentPage=0, pageSize=0, totalCounts=0, totalPages=0, list=null, t=null]

现在换成用Model传值

这是Model传值的Controller代码

@RequestMapping(value="/findalltradingrecord")
	public String findWorklogByUserId(PageUtil<TradingRecord> pageUtil,Model model){
		
		
		if (pageUtil==null||pageUtil.getCurrentPage()==0){ 
			pageUtil=new PageUtil<TradingRecord>(1, 20);
			pageUtil.setT(new TradingRecord());
		}
		try {
			tradingRecordService.findTradingRecordByPage(pageUtil);
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		System.out.println("pageUtil========"+pageUtil.toString());
		model.addAttribute("pageUtil", pageUtil);
		return "tradingrecord/trading_record";
	}

其它的无变动

这是重启服务器后前端输出的数据

PageUtil [currentPage=1, pageSize=20, totalCounts=4, totalPages=1, list=[TradingRecord [tradingRecordId=3, tradingRecordName=交易记录测试1, tradingRecordTime=Wed Sep 05 09:26:43 CST 2018, tradingRecordPayee=User [userid=20180425, userUUID=A722BDFE-74D1-4842-BF3B-BDE078CBCDA8, username=admin, deptid=null, phone1=null, phone2=null, email=null, userIcon=null, 。。。。。。之后省略

原因暂时不明，记录下待解决

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model.addAttribute()：在我写项目的时候使用这个方法不能传递5条以上的数据 request.setAttribute()：换成这个方法却可以传递8条数据。 目前还找不到原因，也有可能是自己使用失误。先写写篇博客记下。
Spring MVC[02-02]Model对象.addAttribute(“key“,“value“)与HttpSession对象.setAttribute(“key“,“value“)的区别
Toozky的博客
05-05 469
Spring MVC[02-02]Model对象.addAttribute(“key”,“value”)与HttpSession对象.setAttribute(“key”,“value”)的区别 IDEA创建maven-archetype-webapp项目 pom.xml properties标签中添加spring.version标签 <properties> <project.build.sourceEncoding>UTF-8</project.build.sour
package com.example.controller; import com.example.domain.Cart; import com.example.domain.Order; import com.example.service.OrderService; import jakarta.servlet.http.HttpServletRequest; import jakarta.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.*; import java.util.List; @Controller @RequestMapping("/orders") public class OrderController { @Autowired private HttpServletRequest request; @Autowired private OrderService orderService; @PostMapping("/order") public String order(@RequestBody List<Cart> carts , Model model){ HttpSession session = request.getSession(); Long userId =(Long)session.getAttribute("userId"); List<Order> orders = orderService.getByUserId(userId); session.setAttribute("orders",orders); session.setAttribute("carts",carts); // model.addAttribute("username",session.getAttribute("username")); // model.addAttribute("orders",orders); // model.addAttribute("carts",carts); return "/order"; } @GetMapping("/order2") public String order2(Model model){ HttpSession session = request.getSession(); model.addAttribute("username",session.getAttribute("username")); model.addAttribute("orders",session.getAttribute("orders")); model.addAttribute("carts",session.getAttribute("carts")); return "/order"; } @GetMapping("/ok") public String ok(){ return "/ok"; } }
06-06
11. `model.addAttribute("username",session.getAttribute("username"))`、`model.addAttribute("orders",orders)` 和 `model.addAttribute("carts",carts)` 表示将 HttpSession 中的属性值存入 Model 对象中，以便...
public String add(Model model,HttpServletRequest request) throws Exception { model.addAttribute(new BookOrder()); /*查询所有的Room信息*/ List<Room> roomList = roomService.queryAllRoom(); request.setAttribute("roomList", roomList); /*查询所有的RoomType信息*/ List<RoomType> roomTypeList = roomTypeService.queryAllRoomType(); request.setAttribute("roomTypeList", roomTypeList); /*查询所有的UserInfo信息*/ List<UserInfo> userInfoList = userInfoService.queryAllUserInfo(); request.setAttribute("userInfoList", userInfoList); return "BookOrder_add"; }
07-15
这段代码是一个处理HTTP...这段代码使用了Spring MVC框架提供的功能，通过注入相关的服务类（roomService、roomTypeService、userInfoService）来获取数据，并通过Model和HttpServletRequest对象将数据传递给视图渲染。
package com.aaa.controller; import com.aaa.Pojo.Login; import com.aaa.Pojo.Movie; import com.aaa.Pojo.User; import com.aaa.dao.UserDao; import com.aaa.service.LoginService; import com.aaa.until.LayuiResult; import org.apache.ibatis.annotations.Param; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.*; import org.springframework.web.servlet.view.RedirectView; import javax.annotation.Resource; import javax.servlet.http.HttpSession; import java.util.List; import java.util.Map; @Controller @RequestMapping("login") public class LoginController { @Resource LoginService loginService; //后台的登录 @RequestMapping("/login") public String login(){ return "Login"; } //后台的注册 @PostMapping("register") public String register(@RequestParam String userName,@RequestParam String passWord, @RequestParam String confirmPassword, Model model) { if (userName == null || userName.trim().isEmpty()) { model.addAttribute("error", "用户名不能为空"); return "register"; } if (!passWord.equals(confirmPassword)) { model.addAttribute("error", "两次输入的密码不一致"); return "register"; } // 调用服务层保存用户信息到数据库 boolean success = loginService.insert(userName, passWord); if (success) { return "redirect:/module/Login.jsp"; // 注册成功跳转登录页 } else { model.addAttribute("error", "注册失败，请稍后再试"); return "module/register"; } } @RequestMapping("/user") public String loginyan(User user , HttpSession session){ List<User> users = loginService.selectAllUser(user); if(users.size()>0){ List<Map> maps = loginService.selectFunction(user.getUserName(), 0); // 放 session session.setAttribute("funs",maps); return "Main"; }else { return "Login"; } } @RequestMapping("/userUi") public String loginUI(){ return "UserUi"; } // 客户端订单 @RequestMapping("/selectById") @ResponseBody public List<Login> selectById(int id) { //查询 List<Login> list = loginService.selectById(id); return list; } //客户端登录 @RequestMapping("/loginUi") public RedirectView login(Login login) { //查询 List<Login> list = loginService.login(login); //判断如果查询的结果大于0，登陆成功 if (list.size() > 0) { return new RedirectView("/module/movieList.jsp?id="+list.get(0).getId()); }else { return new RedirectView("/module/UserUi.jsp"); } } //客户端注册 @RequestMapping("/registe") public String registe(@Param("phone")String phone,@Param("passWord") String passWord, Model model) { if (phone == null || phone.trim().isEmpty()) { model.addAttribute("error", "手机号不能为空"); return "UserUiD"; // 返回注册页面视图名 } if (!passWord.equals(passWord)) { model.addAttribute("error", ""); return "UserUiD"; } boolean success = loginService.inset(phone, passWord); if (success) { return "UserUi"; // 注册成功跳转登录页 } else { model.addAttribute("error", "注册失败，请稍后再试"); return "UserUiD"; } } //后台账号管理 //查询 @RequestMapping("/all") @ResponseBody public LayuiResult selectAllMovice(Integer page, Integer limit, String name){ return loginService.selectAll(page, limit, name); } //新增保存 和修改 @RequestMapping("/SaveMovie") @ResponseBody public int saveMovice(User user){ Integer id = user.getId(); int i=0; if(id!=null){ i= loginService.updateuser(user); }else{ i = loginService.inseruser(user); } return i; } //删除用户 @RequestMapping("/deleteUser") @ResponseBody public int deleteUser(@RequestParam("id") Integer id) { return loginService.deleteUser(id); } //数据的回显 @GetMapping("/selectBd") @ResponseBody public List<User> selectById(@RequestParam("id") Integer id) { return loginService.selectBd(id); } }
最新发布
07-03
以下为用户提供的 `LoginController` 类，该类是一个 Spring MVC 控制器，用于处理与用户登录、退出以及页面跳转相关的请求： ```java package com.kuang.controller; import org.springframework.stereotype....
springboot 用request.setAttribute 传值到控制层
qq56477643的博客
10-09 779
【代码】springboot 用request.setAttribute 传值到控制层。
request.setAttribute和request.getAttribute还有session.setAttribute和session.getAttribute还有request.getPar
daobuxinzi的博客
08-18 2080
而不同页面间传值使用request.setAttribute(position, nameOfObj)时，只会从a.jsp到b.jsp一次传递，之后这个request就会失去它的作用范围，再传就要再设一个 request.setAttribute()。（1）request.getParameter()取得是通过容器的实现来取得通过类似post，get等方式传入的数据，request.setAttribute()和getAttribute()只是在web容器内部流转，仅仅是请求处理阶段。...
getAttribute和setAttribute
weixin_46451295的博客
09-02 200
<li class="name">1</li> <li>2</li> const li = document.getElementsByTagName("li")[0] console.log(99,li) const liClass = li.getAttribute('class'); console.log(99,liClass) li.setAttribute('class','sex') 2. 获取body的类名 <body ..
differences between Request Attributes and Request
shirlly
07-05 212
HttpServletRequest类既有getAttribute()方法，也由getParameter()方法，这两个方法有以下区别： （1）HttpServletRequest类有setAttribute()方法，而没有setParameter()方法 （2）当两个Web组件之间为链接关系时，被链接的组件通过getParameter()方法来获得...
SpringMvc(二)把controller数据返回到网页回显、返回json数据、全局异常处理类、拦截器。
qq_44189274的博客
06-09 1488
request: 作用范围: 同一个请求内有效。setAttribute(key,value)session：作用范围: 同一个会话有效，只要会话不关闭会一直有效。setAttribute(key,value)网页如何获取保存的数据: EL表达式。${scope.key}将controller 数据返回到网页上:保存到request范围。 保存到model范围。 保存到session范围。 我们可以指定某些 model 的key在session范围 使用 @SessionAttributes
spring mvc 下
xiaofanren1111的博客
01-17 248
先从配置说 1.web.xml：web项目的最基本的配置文件，所有框架监听器、servlet都在此配置 1.1.web.xml是maven自动生成的使用的是2.3.dtd的标准，该标准默认关闭EL表达式，如果想使用EL表达式可以使用2.4及以上的标准 <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:
springmvc中的model和HttpServletRequest的区别详细分析
码农研究僧的博客
01-07 2943
目录前言1. 定义1.1 HttpServletRequest1.2 model2. 总结 前言 写代码的时候经常遇到model传值或者HttpServletRequest传值发现都可以 那两种的区别在于哪里呢 此处push出代码展示区别何在 //实现登判断,并进行相应的跳转 @RequestMapping("/login") public String login(String name , String pwd, HttpServletRequest request){ Admin admin
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