• 1.sqlSession不同

@Testpublic void test05() throws IOException {SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();SqlSession sqlSession01 = sqlSessionFactory.openSession();try{EmployeeMapper mapper01 = sqlSession01.getMapper(EmployeeMapper.class);Employee emp01 = mapper01.getEmpById(1);System.out.println(emp01);SqlSession sqlSession02 = sqlSessionFactory.openSession();EmployeeMapper mapper02 = sqlSession02.getMapper(EmployeeMapper.class);Employee emp02 = mapper02.getEmpById(1);System.out.println(emp02);System.out.println(emp01==emp02);sqlSession02.close();}finally {sqlSession01.close();}}

• 2.sqlSession相同，查詢(xún)條件不同

@Testpublic void test05() throws IOException {SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();SqlSession sqlSession01 = sqlSessionFactory.openSession();try{EmployeeMapper mapper01 = sqlSession01.getMapper(EmployeeMapper.class);Employee emp01 = mapper01.getEmpById(1);System.out.println(emp01);// SqlSession sqlSession02 = sqlSessionFactory.openSession(); // // EmployeeMapper mapper02 = sqlSession02.getMapper(EmployeeMapper.class);Employee emp02 = mapper01.getEmpById(2);System.out.println(emp02);System.out.println(emp01==emp02);// sqlSession02.close();}finally {sqlSession01.close();}}

• 3.sqlSession相同，兩次查詢(xún)之間執(zhí)行了增刪改操作（這次增刪改可能對(duì)當(dāng)前數(shù)據(jù)有影響）

@Testpublic void test05() throws IOException {SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();SqlSession sqlSession01 = sqlSessionFactory.openSession();try{EmployeeMapper mapper01 = sqlSession01.getMapper(EmployeeMapper.class);Employee emp01 = mapper01.getEmpById(1);System.out.println(emp01);// SqlSession sqlSession02 = sqlSessionFactory.openSession(); // // EmployeeMapper mapper02 = sqlSession02.getMapper(EmployeeMapper.class);mapper01.addEmp(new Employee(null,"testCache","cache","1"));System.out.println("數(shù)據(jù)添加成功");Employee emp02 = mapper01.getEmpById(2);System.out.println(emp02);System.out.println(emp01==emp02);// sqlSession02.close();}finally {sqlSession01.close();}}

• 4.sqlSession相同，手動(dòng)清除了一級(jí)緩存（緩存清空）

@Testpublic void test05() throws IOException {SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();SqlSession sqlSession01 = sqlSessionFactory.openSession();try{EmployeeMapper mapper01 = sqlSession01.getMapper(EmployeeMapper.class);Employee emp01 = mapper01.getEmpById(1);System.out.println(emp01);// SqlSession sqlSession02 = sqlSessionFactory.openSession(); // // EmployeeMapper mapper02 = sqlSession02.getMapper(EmployeeMapper.class);// mapper01.addEmp(new Employee(null,"testCache","cache","1")); System.out.println("數(shù)據(jù)添加成功");sqlSession01.clearCache();Employee emp02 = mapper01.getEmpById(2);System.out.println(emp02);System.out.println(emp01==emp02);// sqlSession02.close();}finally {sqlSession01.close();}}

總結(jié)

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