通过Spring和MyBatis的组合，给出一个较为详细的实例

 

　　代码清单：配置Spring+MyBatis测试环境

 

　　代码清单：POJO类——Role.java

package com.ssm.chapter13.pojo;public class Role {    private Long id;    private String roleName;    private String note;}

 

　　代码清单：搭建MyBatis的RoleMapper.xml

      
          
       
                insert into t_role (role_name, note)        values (#{roleName}, #{note})    
       
      

 

　　代码清单：RoleMapper接口

package com.ssm.chapter13.mapper;import com.ssm.chapter13.pojo.Role;import org.springframework.stereotype.Repository;@Repositorypublic interface RoleMapper {    public int insertRole(Role role);}

 

　　代码清单：mybatis-config.xml

 

　　代码清单：操作角色的两个接口

public interface RoleService {    public int insertRole(Role role);}public interface RoleListService {    public int insertRoleList(List
      
        roleList);}
      

 

　　代码清单：两个接口的实现类

@Servicepublic class RoleServiceImpl implements RoleService {    @Autowired    private RoleMapper roleMapper;    @Override    @Transactional(propagation = Propagation.REQUIRES_NEW, isolation = Isolation.READ_COMMITTED)    public int insertRole(Role role) {        return roleMapper.insertRole(role);    }}@Servicepublic class RoleListServiceImpl implements RoleListService {    Logger log = Logger.getLogger(RoleListServiceImpl.class);    @Autowired    private RoleService roleService;    @Override    @Transactional(propagation = Propagation.REQUIRED, isolation = Isolation.READ_COMMITTED)    public int insertRoleList(List
      
        roleList) {        int count = 0;        for (Role role : roleList) {            try {                count += roleService.insertRole(role);            } catch (Exception ex) {                log.info(ex);            }        }        return count;    }}
      

 

　　代码清单：测试隔离级别和传播行为——Chapter13Main.java

public class Chapter13Main {    public static void main(String[] args) {        ApplicationContext ctx = new ClassPathXmlApplicationContext("ssm/chapter13/spring-cfg.xml");        RoleListService roleListService = ctx.getBean(RoleListService.class);        List
      
        roleList = new ArrayList
       
        ();        for (int i = 1; i <= 2; i++) {            Role role = new Role();            role.setRoleName("role_name_" + i);            role.setNote("note_" + i);            roleList.add(role);        }        int count = roleListService.insertRoleList(roleList);        System.out.println(count);    }}
       
      

 

　　由于保存点技术并不是每一个数据库都能支持的，所以当你把传播行为设置为NESTED时，Spring会先去探测当前数据库是否能够支持保存点技术。如果数据库不予支持，它就会和REQUIRES_NEW一样创建新事务去运行代码，以达到内部方法发生异常时并不回滚当前事务的目的。

文章来源:ssm13.6