spring+mybatis的公用DAO
这里的配置和http://my.oschina.net/u/2274874/blog/639504中用到的差不多，只是做了一些小改动。
把整合ibatis这段改一下就可以了，这里把标签改简洁了，不改也可以。
<!-- 整合mybatis --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="DataSource" /> <property name="configLocation" value="classpath:SqlMapConfig.xml" /> </bean>
这个DAO继承了SqlSessionDaoSupport，用到mybatis-spring，主要就是批量处理。在网上找了很多资料，发现很多都是通过改造xml的sql语句来达到批量操作的效果。这里我只是实验了批量插入的例子，其他的没试，估计也差不多吧，以后有用到再说，现在只是试试。
public class BaseDao extends SqlSessionDaoSupport {
private static final Logger logger = Logger.getLogger(Thread
.currentThread().getStackTrace()[1].getClassName());
@Resource(name = "sqlSessionFactory")
private SqlSessionFactory sqlSessionFactory;
private SqlSession batchSession;
@PostConstruct
public void SqlSessionFactory() {
super.setSqlSessionFactory(sqlSessionFactory);
}
public int batchInsert(String statement, List<?> list) {
batchSession = sqlSessionFactory.openSession(ExecutorType.BATCH, false);
int i = 0;
for(int cnt = list.size(); i < cnt; i++) {
batchSession.insert(statement, list.get(i));
if((i + 1) % Constants.BATCH_DEAL_NUM == 0) {//Constants.BATCH_DEAL_NUM为批量提交的条数
batchSession.flushStatements();
}
}
batchSession.flushStatements();
batchSession.close();
return i;
}
public int batchUpdate(String statement, List<?> list) {
batchSession = sqlSessionFactory.openSession(ExecutorType.BATCH, false);
int i = 0;
for(int cnt = list.size(); i < cnt; i++) {
batchSession.update(statement, list.get(i));
if((i + 1) % Constants.BATCH_DEAL_NUM == 0) {
batchSession.flushStatements();
}
}
batchSession.flushStatements();
batchSession.close();
return i;
}
public int batchDelete(String statement, List<?> list) {
batchSession = sqlSessionFactory.openSession(ExecutorType.BATCH, false);
int i = 0;
for(int cnt = list.size(); i < cnt; i++) {
batchSession.delete(statement, list.get(i));
if((i + 1) % Constants.BATCH_DEAL_NUM == 0) {
batchSession.flushStatements();
}
}
batchSession.flushStatements();
batchSession.close();
return i;
}
}
下面是一个使用的例子，用的是mybatis3.X的版本。
@Service("TestinfoDaoImpl")
public class TestinfoDaoImpl extends BaseDao implements TestinfoDao {
public void deleteTestinfo(Map<String, Object> index) {
this.getSqlSession().delete("deleteTestinfo", index);
}
// 批量插入
public void insertBatchTestinfo(List<TestInfo> list) {
this.batchInsert("insertTestinfo", list);
}
public void insertTestinfo(TestInfo instance) {
this.getSqlSession().insert("insertTestinfo", instance);
}
public List<TestInfo> selectTestinfos(Map<String, Object> index) {
return this.getSqlSession().selectList("selectTestinfos", index);
}
// 查询条数
public int selectTestinfosCount(Map<String, Object> index) {
return this.getSqlSession().selectOne("selectTestinfosCount", index);
}
public void updateTestinfo(Map<String, Object> index) {
this.getSqlSession().update("updateTestinfo", index);
}
}
插入语句的sql
<insert id="insertTestinfo" parameterType="TestInfo">
INSERT INTO TESTINFO (
TESTID,
TESTNM,
PASSWD,
ROLEID,
EMAIL,
MOBILE,
REMARK
) VALUES (
#{testid},
#{testnm},
#{passwd},
#{roleid},
#{email},
#{mobile},
#{remark}
)
</insert>
插入的结果log，从log中可以看出是批量插入。这里为了测试好看，设置了50条提交一次。
Preparing: INSERT INTO TESTINFO ( TESTID, TESTNM, PASSWD, ROLEID, EMAIL, MOBILE, REMARK ) VALUES ( ?, ?, ?, ?, ?, ?, ? ) Parameters: test0(String), test0(String), 123456(String), 1(String), (String), (String), (String) Parameters: test1(String), test1(String), 123456(String), 1(String), (String), (String), (String) Parameters: test2(String), test2(String), 123456(String), 1(String), (String), (String), (String) ......省略n行 Parameters: test47(String), test47(String), 123456(String), 1(String), (String), (String), (String) Parameters: test48(String), test48(String), 123456(String), 1(String), (String), (String), (String) Parameters: test49(String), test49(String), 123456(String), 1(String), (String), (String), (String) stmt enter cache ooo Using Connection [oracle.jdbc.driver.T4CConnection@9209e8] Preparing: INSERT INTO TESTINFO ( TESTID, TESTNM, PASSWD, ROLEID, EMAIL, MOBILE, REMARK ) VALUES ( ?, ?, ?, ?, ?, ?, ? ) Parameters: test50(String), test50(String), 123456(String), 1(String), (String), (String), (String) Parameters: test51(String), test51(String), 123456(String), 1(String), (String), (String), (String) Parameters: test52(String), test52(String), 123456(String), 1(String), (String), (String), (String) ......省略n行 Parameters: test97(String), test97(String), 123456(String), 1(String), (String), (String), (String) Parameters: test98(String), test98(String), 123456(String), 1(String), (String), (String), (String) Parameters: test99(String), test99(String), 123456(String), 1(String), (String), (String), (String)