application.xml中配置：
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="${jdbc.driver}" />
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!--mybatis的sqlsessionFactory配置-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:mybatis-config.xml" />
<property name="mapperLocations" value="classpath:cn/edu/nuc/mybatis/mapper/*.xml" />
</bean>
BaseDao.java（继承SqlSessionDaoSupport）
public class BaseDao<T,PK extends Serializable> extends SqlSessionDaoSupport implements IBaseDao<T, PK>{//SqlMapClientDaoSupport
// mapper.xml中的namespace
private String namespace = "";
// sqlmap.xml定义文件中对应的sqlid
public static final String SQLID_INSERT = "insert";
public static final String SQLID_INSERT_BATCH = "insertBatch";
public static final String SQLID_UPDATE = "update";
public static final String SQLID_UPDATE_PARAM = "updateParam";
public static final String SQLID_UPDATE_BATCH = "updateBatch";
public static final String SQLID_DELETE = "delete";
public static final String SQLID_DELETE_PARAM = "deleteParam";
public static final String SQLID_DELETE_BATCH = "deleteBatch";
public static final String SQLID_TRUNCATE = "truncate";
public static final String SQLID_SELECT = "select";
public static final String SQLID_SELECT_PK = "selectPk";
public static final String SQLID_SELECT_PARAM = "selectParam";
public static final String SQLID_SELECT_FK = "selectFk";
public static final String SQLID_COUNT = "count";
public static final String SQLID_COUNT_PARAM = "countParam";
public String getNamespace() {
Class<T> clazz = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
String clazzName = clazz.getName();
namespace = clazzName;
return namespace;
}
public void setNamespace(String namespace) {
this.namespace = namespace;
}
@Override
public int insert(T entity) {
int rows = 0;
try {
rows = getSqlSession().insert(getNamespace() + "." + SQLID_INSERT,entity);
} catch (Exception e) {
e.printStackTrace();
}
return rows;
}
@Override
public int update(T entity) {
int rows = 0;
try {
rows = getSqlSession().update(namespace + "." + SQLID_UPDATE, entity);
} catch (Exception e) {
e.printStackTrace();
}
return rows;
}
@Override
public int updateParam(Map param) {
int rows = 0;
try {
rows = getSqlSession().update(namespace + "." + SQLID_UPDATE_PARAM,
param);
} catch (Exception e) {
e.printStackTrace();
}
return rows;
}
@Override
public int delete(PK primaryKey) {
int rows = 0;
try {
rows = getSqlSession().delete(namespace + "." + SQLID_DELETE,primaryKey);
} catch (Exception e) {
e.printStackTrace();
}
return rows;
}
@Override
public int deleteParam(Map param) {
int rows = 0;
try {
rows = getSqlSession().delete(namespace + "." + SQLID_DELETE_PARAM,param);
} catch (Exception e) {
e.printStackTrace();
}
return rows;
}
@Override
public int truncate() {
int rows = 0;
try {
rows = getSqlSession().delete(namespace + "." + SQLID_TRUNCATE);
} catch (Exception e) {
e.printStackTrace();
}
return rows;
}
@Override
public int count() {
int result = 0;
try {
result = getSqlSession().selectOne(namespace + "." + SQLID_COUNT);
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
@Override
public int count(Object param) {
int result = 0;
try {
result = getSqlSession().selectOne(namespace + "." + SQLID_COUNT_PARAM,param);
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
@Override
public T get(PK primaryKey) {
try {
return getSqlSession().selectOne(getNamespace() + "." + SQLID_SELECT_PK,primaryKey);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
@Override
public List<T> select() {
try {
return getSqlSession().selectList(namespace + "." + SQLID_SELECT);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
@Override
public List<T> selectParam(Map param) {
try {
return getSqlSession().selectList(namespace + "." + SQLID_SELECT_PARAM,param);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
@Override
public PagingResult<T> selectPagination(PageEntity pageEntity) {
try {
int page = pageEntity.getPage() == null || "".equals(pageEntity.getPage()) ? 1 : pageEntity.getPage(); //默认为第一页
int size = pageEntity.getSize() == null || "".equals(pageEntity.getSize()) ? 15 : pageEntity.getSize();; //默认每页15个
RowBounds rowBounds = new RowBounds((page-1)*size, size);
Map param = pageEntity.getParams();
if (param != null) {
param.put("orderColumn", pageEntity.getOrderColumn());
param.put("orderTurn", pageEntity.getOrderTurn());
}else {
param = new HashMap();
param.put("orderColumn", pageEntity.getOrderColumn());
param.put("orderTurn", pageEntity.getOrderTurn());
}
List<T> resultList = getSqlSession().selectList(namespace + "." + SQLID_SELECT_PARAM,param,rowBounds);
int totalSize = count(pageEntity.getParams());
PagingResult<T> pagingResult = new PagingResult<T>();
pagingResult.setCurrentPage(page);
pagingResult.setTotalSize(totalSize);
pagingResult.setResultList(resultList);
return pagingResult;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
@Override
public int batchInsert(List<T> list) {
try {
return getSqlSession().insert(namespace + "." + SQLID_INSERT_BATCH,list);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
@Override
public int batchUpdate(List<T> list) {
int rows = 0;
try {
for (T t : list) {
rows = rows + getSqlSession().update(namespace + "." + SQLID_UPDATE, t);
}
} catch (Exception e) {
e.printStackTrace();
}
return rows;
}
@Override
public int batchDelete(List<PK> list) {
try {
return getSqlSession().delete(namespace + "." + SQLID_DELETE_BATCH,list);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/**
* 日志打印
* @param sqlId
* @param param
*/
public void printLog(String sqlId,Object param){
Configuration configuration = getSqlSession().getConfiguration();
//sqlId为配置文件中的sqlid
MappedStatement mappedStatement = configuration.getMappedStatement(sqlId);
//param为传入到sql语句中的参数
BoundSql boundSql = mappedStatement.getBoundSql(param);
//得到sql语句
String sql = boundSql.getSql().trim();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("info-sql: "+sdf.format(new Date())+" "+sql);
}
}