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问题：spring的注解功能@autowired，默认是以type也就是类型匹配的，但是同一个类对应不同名字对象的情况，会无法确定是哪个类的对象。

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"/>
</bean>

<bean id="tbhyJdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="tbhyDataSource"/>
</bean>

　　可以在@autowired后[email protected]("jdbcTemplate")

声明变量的时候，可以通过名字注入。

private JdbcTemplate jdbcTemplate;

private JdbcTemplate tbhyJdbcTemplate;

问题： transactionTemplate的用法。

package com.taobao.rrplatform.dao.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.taobao.rrplatform.dao.TbhyDAO;
import com.taobao.rrplatform.domain.TbhyScenarioSettingDomain;
import com.taobao.rrplatform.domain.TbhyTabSetingDomain;
import com.taobao.rrplatform.domain.TbhyTopicSettingDomain;
import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;
import org.springframework.transaction.support.TransactionTemplate;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * 淘宝行业平台场景数据访问DAO
 * Created by goofy on 2014/7/11.
 */
public class TbhyDAOImpl extends SqlMapClientDaoSupport implements TbhyDAO {

    @Resource
    private TransactionTemplate transactionTemplate;

    @Override
    public TbhyScenarioSettingDomain get(long sceneId) {
        TbhyScenarioSettingDomain query = new TbhyScenarioSettingDomain();
        query.setSceneId(sceneId);
        TbhyScenarioSettingDomain scene = (TbhyScenarioSettingDomain) getSqlMapClientTemplate().queryForObject("tbhyScenarioSetting.select", query);
        TbhyTopicSettingDomain topicQuery = new TbhyTopicSettingDomain();
        topicQuery.setScenarioId(scene.getId());
        List<TbhyTopicSettingDomain> topics = getSqlMapClientTemplate().queryForList("tbhyTopicSetting.select", topicQuery);
        scene.setTopicList(topics);
        for (TbhyTopicSettingDomain topic : topics) {
            TbhyTabSetingDomain tabQuery = new TbhyTabSetingDomain();
            tabQuery.setTopicId(topic.getId());
            List<TbhyTabSetingDomain> tabs = getSqlMapClientTemplate().queryForList("tbhyTabSeting.select", tabQuery);
            topic.setTabList(tabs);
        }
        return scene;
    }

    @Override
    public TbhyScenarioSettingDomain add(final TbhyScenarioSettingDomain domain) {
        return (TbhyScenarioSettingDomain) transactionTemplate.execute(new TransactionCallback() {
            @Override
            public Object doInTransaction(TransactionStatus status) {
                Long id = (Long) getSqlMapClientTemplate().insert("tbhyScenarioSetting.insert", domain);
                domain.setId(id);
                addSceneTopicsAndTabs(domain);
                return domain;
            }
        });
    }

    /**
     * 插入场景的小主题和小主题下的tab信息
     *
     * @param domain
     */
    private void addSceneTopicsAndTabs(TbhyScenarioSettingDomain domain) {
        for (TbhyTopicSettingDomain topic : domain.getTopicList()) {
            topic.setScenarioId(domain.getId());
            Long topicId = (Long) getSqlMapClientTemplate().insert("tbhyTopicSetting.insert", topic);
            topic.setId(topicId);
            for (TbhyTabSetingDomain tab : topic.getTabList()) {
                tab.setTopicId(topicId);
                tab.setId((Long) getSqlMapClientTemplate().insert("tbhyTabSeting.insert", tab));
            }
        }
    }

    @Override
    public boolean delete(final long sceneId) {
        transactionTemplate.execute(new TransactionCallbackWithoutResult() {
            @Override
            protected void doInTransactionWithoutResult(TransactionStatus status) {
                TbhyScenarioSettingDomain scene = get(sceneId);
                getSqlMapClientTemplate().delete("tbhyScenarioSetting.delete", scene.getId());
                deleteSceneTopicsAndTabs(scene);
            }
        });
        return true;
    }

    /**
     * 删除场景的小主题和小主题下的tab信息
     *
     * @param scene
     */
    private void deleteSceneTopicsAndTabs(TbhyScenarioSettingDomain scene) {
        for (TbhyTopicSettingDomain topic : scene.getTopicList()) {
            getSqlMapClientTemplate().delete("tbhyTopicSetting.delete", topic);
            for (TbhyTabSetingDomain tab : topic.getTabList()) {
                getSqlMapClientTemplate().delete("tbhyTabSeting.delete", tab);
            }
        }
    }

    @Override
    public TbhyScenarioSettingDomain update(final TbhyScenarioSettingDomain domain) {
        transactionTemplate.execute(new TransactionCallbackWithoutResult() {
            @Override
            protected void doInTransactionWithoutResult(TransactionStatus status) {
                getSqlMapClientTemplate().update("tbhyScenarioSetting.update", domain);
                deleteSceneTopicsAndTabs(domain);
                addSceneTopicsAndTabs(domain);
            }
        });
        return get(domain.getId());
    }

    public static void main(String[] args) {
        TbhyScenarioSettingDomain scene = new TbhyScenarioSettingDomain();
        scene.setCreator("古飞");
        scene.setGmtCreate(new Date());
        scene.setGmtModified(new Date());
        scene.setId(12l);
        scene.setIndustryId(12l);
        scene.setLayoutType(1);
        scene.setMaxItemPerBrand(5);
        scene.setScenarioName("测试场景");
        List<TbhyTopicSettingDomain> topicList = new ArrayList<TbhyTopicSettingDomain>(2);
        scene.setTopicList(topicList);

        for (int i = 0; i < 2; i++) {
            TbhyTopicSettingDomain topic = new TbhyTopicSettingDomain();
            topic.setCreator("gufei");
            topic.setDatasourceGroup(13l + 100 * i);
            topic.setDisplayOrder(i);
            topic.setGmtCreate(new Date());
            topic.setGmtModified(new Date());
            topic.setId((long) i);
            topic.setPictureUrl("http://baidu.com");
            topic.setRankOption(2);
            topic.setScenarioId(12l);
            topic.setTabNum(3);
            topic.setTopicName("测试topic" + i);
            List<TbhyTabSetingDomain> tabList = new ArrayList<TbhyTabSetingDomain>(2);
            topic.setTabList(tabList);
            for (int j = 0; j < 2; j++) {
                TbhyTabSetingDomain tab = new TbhyTabSetingDomain();
                tab.setCreator("gufei");
                tab.setDatasourceId((long) (15 + 20 * j));
                tab.setDisplayOrder(j);
                tab.setGmtCreate(new Date());
                tab.setGmtModified(new Date());
                tab.setId((long) j);
                tab.setPictureUrl("http://xxx.com/p/i" + j);
                tab.setTabName("测试tab" + i * 100 + j);
                tab.setTopicId((long) i);
                tabList.add(tab);
            }
            topicList.add(topic);
        }

        System.err.print(JSON.toJSONString(scene, SerializerFeature.PrettyFormat));
    }
}

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