2、1 昨天讲列表缓存，为了让列表更新，我们需要在增、删、改方法之前加 @CacheEvict(value="list",allEntries = true)

 package com.bw.service;

 import java.util.List;

 import javax.annotation.Resource;

 import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Service;

 import com.bw.entity.Student;
 import com.bw.repository.StudentRepository;
 import com.bw.utils.MD5Util;

 @Service
 public class StudentService implements IStudentService{
     @Resource private StudentRepository studentRepository;

     @Override
     @Cacheable(value="list")
     public List<Student> list() {
         // TODO Auto-generated method stub
         return studentRepository.findAll();
     }

     @Override
     @CacheEvict(value="list",allEntries = true)
     public void save(Student student) {
         // TODO Auto-generated method stub
         student.setPwd(MD5Util.md5(student.getPwd()));
         studentRepository.save(student);
     }

     @Override
     public Student login(Student student) {
         // TODO Auto-generated method stub
         return studentRepository.findBySnameAndPwd(student.getSname(),student.getPwd());
     }

     @Override
     public Student findBySname(String sname) {
         // TODO Auto-generated method stub
         return studentRepository.findBySname(sname);
     }

     @Override
     public Student findBySid(String  sid) {
         // TODO Auto-generated method stub
         return studentRepository.findBySid(sid);
     }

 }