当普通JAVA类或者JSP需要使用service中的方法或者执行sql时使用

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/**
 * Created by X on 2017/6/27.
 * 用于其他类使用service和sqlsession
 */
public class DBAccess extends SqlSessionDaoSupport implements ApplicationContextAware {
    private static ApplicationContext applicationContext;
    private static SqlSession         sqlSession;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    @Override
    @Autowired
    public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
        super.setSqlSessionTemplate(sqlSessionTemplate);
        this.sqlSession = sqlSessionTemplate;
    }

    public static ApplicationContext getContext() {
        return applicationContext;
    }

    public static SqlSession getSqlSessions() {
        return sqlSession;
    }
}

applicationContext.xml中配置此bean，以便让Spring启动时自动为我们注入ApplicationContext对象

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<bean class="com.xizirumeng.util.DBAccess"></bean>

使用：

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DBAccess.getContext().getBean("WxUserServiceImpl");
DBAccess.getSqlSessions();