避坑mybatis的一级缓存
众所周知，mybatis在访问数据库时提供了缓存技术，具体来说，基于内部维护的一级缓存，即使用Map对某个select的语句进行缓存，在下次进行访问时优先查找本地的Map从中得到上次查询到的数据。大大的节省了mybatis的查询消耗。然而，在某些特定的场合下，我们需要数据的实时更新，因此需要禁掉它的缓存。
例如：
如何观察出是缓存问题呢？
因为我打印这个集合的size()，刚进入方法为2，到下边就为0，是由于中途全部移除那个操作。此功能为什么不更换查询条件或者直接再用另一个list接收数据呢？因为我还有另一个方法复用此处查询数据。
好了，解决方法。再selectByExample();的xml文件中设置这一属性：flushCache=“true”。刷新掉此语句的缓存。ok解决了。原因很简单，有时候出bug也是被逼无奈+懒，不愿意再多写。希望思路对你有用，
感兴趣可以看下边的关联的代码。在这里插入代码片package com.joinx.salary.service.impl;
import com.joinx.salary.pojo.;
import com.joinx.salary.repository.;
import com.joinx.salary.service.DepartmentService;
import com.joinx.salary.util.DecorateMap;
import com.joinx.salary.util.PageHelper;
import com.joinx.salary.util.TimeUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.math.BigDecimal;
import java.util.*;
import java.util.stream.Collectors;
/**
-
@Author
-
@Date
-
@Description
*/
@Service
public class DepartmentServiceImpl implements DepartmentService {
@Autowired
private DepartmentRepository departmentRepository;
@Autowired
private UserRepository userRepository;
@Autowired
private SalaryRepository salaryRepository;@Autowired
private DepartSalaryRecordMapper departSalaryRecordMapper;@Autowired
private SalaryRateMapper salaryRateMapper;@Override
public List departmentsInfo(PageHelper pageHelper) {
return departmentRepository.getDepartments(pageHelper);
}@Override
public Map
getCharts
(AreaTimeVO areaTime) {
HashMap
DecorateMap map = new DecorateMap();
areaTime.setStart(areaTime.getStart()==null?TimeUtil.getLastMonthBegin():areaTime.getStart());
areaTime.setEnd(areaTime.getEnd()==null?TimeUtil.getLastMonthEnd():areaTime.getEnd());
List series=new ArrayList();
List xAxis=new ArrayList();
//获取所在的规定月份的工资
DepartSalaryRecordExample e = new DepartSalaryRecordExample();
e.createCriteria()
.andSalarySendTimeBetween(areaTime.getStart(),areaTime.getEnd());
List records = departSalaryRecordMapper.selectByExample(e);
records=check(records,areaTime);
for(DepartSalaryRecord record:records){
series.add(record.getSalaryCount());
//+
// TimeUtil.getYMD(areaTime.getStart())+"至"+TimeUtil.getYMD(areaTime.getEnd())+"所缴纳总金额"
xAxis.add(departmentRepository.getDepartmentByDno(record.getDepartId()).getDName());
}
map.put("series",series)
.put("xAxis",xAxis);
maps.put("map",map);
maps.put("time",areaTime);
return maps;
}
private List **
check
(** List records, AreaTimeVO areaTime) {
System.out.println(“areaTime = " + areaTime);
System.out.println(records.size()+”=000000");
List ids = records.stream().map(DepartSalaryRecord::getDepartId).distinct().collect(Collectors.toList());
System.out.println(ids.size()+"==ids");
if (ids.size()
for(String id:ids){
System.out.println("ids = " + id);
DepartSalaryRecordExample e = new DepartSalaryRecordExample();
e.createCriteria()
.andSalarySendTimeBetween(areaTime.getStart(),areaTime.getEnd())
.andDepartIdEqualTo(id);
List thisIdRecords = departSalaryRecordMapper.selectByExample(e);
System.out.println("thisIdRecords = " + thisIdRecords);
if(thisIdRecords.size()==1){
records.add(thisIdRecords.get(0));
continue;
}
System.out.println(thisIdRecords.size());
DepartSalaryRecord record = thisIdRecords.get(0);
Double endowmentInsurance = thisIdRecords.stream().map(DepartSalaryRecord::getEndowmentInsurance).reduce(Double::sum).get();;
Double unemployment = thisIdRecords.stream().map(DepartSalaryRecord::getUnemployment).reduce(Double::sum).get();
Double medicare = thisIdRecords.stream().map(DepartSalaryRecord::getMedicare).reduce(Double::sum).get();
Double rearInsurance = thisIdRecords.stream().map(DepartSalaryRecord::getRearInsurance).reduce(Double::sum).get();
Double injuryInsurance = thisIdRecords.stream().map(DepartSalaryRecord::getInjuryInsurance).reduce(Double::sum).get();
Double reservedFund = thisIdRecords.stream().map(DepartSalaryRecord::getReservedFund).reduce(Double::sum).get();
Double salaryBasicCount = thisIdRecords.stream().map(DepartSalaryRecord::getSalaryBasicCount).reduce(Double::sum).get();
Double salaryCount = thisIdRecords.stream().map(DepartSalaryRecord::getSalaryCount).reduce(Double::sum).get();
DepartSalaryRecord record1 = new DepartSalaryRecord(record.getId(), record.getDepartId(), thisIdRecords.get(0).getSalarySendTime(),
salaryCount, salaryBasicCount, endowmentInsurance, medicare,
unemployment, injuryInsurance, rearInsurance, reservedFund);
records.add(record1);
}
}
return records;
}
@Override
public List **
aspect
**(AreaTimeVO areaTime,String departName) {
List pieData=new ArrayList();
areaTime.setStart(areaTime.getStart()==null?TimeUtil.getLastMonthBegin():areaTime.getStart());
areaTime.setEnd(areaTime.getEnd()==null?TimeUtil.getLastMonthEnd():areaTime.getEnd());
//获取所在的规定月份的工资
Department department=departmentRepository.getByNames(departName);
DepartSalaryRecordExample e = new DepartSalaryRecordExample();
e.createCriteria()
.andSalarySendTimeBetween(areaTime.getStart(),areaTime.getEnd())
.andDepartIdEqualTo(department.getDno());
List recordList = departSalaryRecordMapper.selectByExample(e);
List check = *check*(recordList, areaTime);
DepartSalaryRecord cord=check.get(0);
Pie p1 = new Pie();
p1.setName("生育保险金");
p1.setValue(cord.getRearInsurance().toString());
pieData.add(p1);
Pie p2 = new Pie();
p2.setName("养老保险金");
p2.setValue(cord.getEndowmentInsurance().toString());
pieData.add(p2);
Pie p3 = new Pie();
p3.setName("工商保险金");
p3.setValue(cord.getInjuryInsurance().toString());
pieData.add(p3);
Pie p4 = new Pie();
p4.setName("医疗保险金");
p4.setValue(cord.getMedicare().toString());
pieData.add(p4);
Pie p5 = new Pie();
p5.setName("公积金");
p5.setValue(cord.getReservedFund().toString());
pieData.add(p5);
Pie p6 = new Pie();
p6.setName("基础工资");
p6.setValue(cord.getSalaryBasicCount().toString());
pieData.add(p6);
Pie p7 = new Pie();
p7.setName("总下发数目");
p7.setValue(cord.getSalaryCount().toString());
Pie p8 = new Pie();
pieData.add(p8);
p8.setName("失业保险金");
p8.setValue(cord.getUnemployment().toString());
return pieData;
}
@Override
public Map
List data = departSalaryRecordMapper.selectByExample(new DepartSalaryRecordExample());
List response=new ArrayList(20);
for (DepartSalaryRecord record:data){
Department department = departmentRepository.getDepartmentByDno(record.getDepartId());
DecorateMap put = new DecorateMap()
.put(“id”,record.getId())
.put(“dname”, department.getDName())
.put(“dno”, department.getDno())
.put(“medicare”, record.getMedicare())
.put(“injury”, record.getInjuryInsurance())
.put(“endowment”, record.getEndowmentInsurance())
.put(“rear”, record.getRearInsurance())
.put(“unemployment”, record.getUnemployment())
.put(“reservedFund”, record.getReservedFund())
.put(“basicCount”, record.getSalaryBasicCount())
.put(“count”, record.getSalaryCount())
.put(“sendTime”, TimeUtil.getYMDHMS(record.getSalarySendTime()));
response.add(put);
}
return new DecorateMap()
.put(“data”,response)
.put(“msg”,"")
.put(“code”,0)
.put(“total”,response.size());
}
//开始计算上月份部门工资
private void startCaculate(){
PageHelper dhelper = new PageHelper<>();
dhelper.setParam(new Department());
//获取所有的部门
List departments = departmentRepository.getDepartments(dhelper);
for (Department d:departments){
PageHelper uhelper = new PageHelper<>();
User user = new User();
user.setDepartmentNo(d.getDno());
uhelper.setParam(user);
//根据部门的编号获取到员工的编号
List users = userRepository.getUsers(uhelper);
Double departSalary=0d;
AreaTimeVO areaTime=new AreaTimeVO();
areaTime.setStart(TimeUtil.getLastMonthBegin());
areaTime.setEnd(TimeUtil.getLastMonthEnd());
for(User u:users){
//根据员工的编号获取到所发的薪水数目
Salary byAreaTime = salaryRepository.getByAreaTime(u.getUserNo(),areaTime)
.size()>0?salaryRepository.getByAreaTime(u.getUserNo(),areaTime).get(0):null;
if(byAreaTime==null){//没有查出此员工的薪资信息
continue;
}
BigDecimal count=count(byAreaTime);
departSalary+=count.doubleValue();
}
//五险一金
insuranceAndFund(departSalary,d);
}
}
private void insuranceAndFund(
Double departSalary,Department department) {
//公司所缴纳的五险一金情况
SalaryRate salaryRate = salaryRateMapper.selectByPrimaryKey(1);
DepartSalaryRecord record = new DepartSalaryRecord();
record.setDepartId(department.getDno());
record.setEndowmentInsurance((salaryRate.getEndowmentInsuranceRate()*departSalary));
record.setInjuryInsurance(salaryRate.getInjuryInsuranceRate()*departSalary);
record.setMedicare(salaryRate.getMdeicareRate()*departSalary);
record.setRearInsurance(salaryRate.getRearInsuranceRate()*departSalary);
record.setReservedFund(salaryRate.getReservedFundRate()*departSalary);
record.setUnemployment(salaryRate.getUnemploymentRate()*departSalary);
record.setSalarySendTime(new Date());
record.setSalaryBasicCount(departSalary);
record.setSalaryCount(count(record));
departSalaryRecordMapper.insertSelective(record);
}
//五险一金+基础薪资之和
private Double count(DepartSalaryRecord record) {
return record.getEndowmentInsurance()+record.getInjuryInsurance()
+record.getMedicare()+record.getRearInsurance()
+record.getReservedFund()+record.getUnemployment()
+record.getSalaryBasicCount();
}
private BigDecimal count(Salary salary) {
//底薪+绩效-缺勤
BigDecimal end = salary.getBasic().add(salary.getPerformance()).subtract(salary.getWage());
return end;
}
}