mybatis泛型Dao参考四
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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public abstract class BaseDAOImpl {
protected final Log logger = LogFactory.getLog(getClass());
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private QueryDelegate queryDelegate = new QueryDelegate();
private EntityDelegate entityDelegate = new EntityDelegate();
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private DBRoute route = DBRoute.getDefaultRoute();
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public QueryDelegate getQueryDelegate() {
return queryDelegate;
}
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public void setQueryDelegate(QueryDelegate queryDelegate) {
this.queryDelegate = queryDelegate;
}
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public EntityDelegate getEntityDelegate() {
return entityDelegate;
}
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public void setEntityDelegate(EntityDelegate entityDelegate) {
this.entityDelegate = entityDelegate;
}
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public DBRoute getRoute() {
return route;
}
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public void setRoute(DBRoute route) {
this.route = route;
}
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}
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import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
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import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;
import org.springframework.util.Assert;
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public class IbatisGenericDao extends BaseDAOImpl {
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public static final String POSTFIX_INSERT = ".insert";
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public static final String POSTFIX_UPDATE = ".update";
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public static final String POSTFIX_DELETE = ".delete";
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public static final String POSTFIX_DELETE_PRIAMARYKEY = ".deleteByPrimaryKey";
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public static final String POSTFIX_SELECT = ".select";
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public static final String POSTFIX_GETALL = ".getAll";
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public static final String POSTFIX_SELECTMAP = ".selectByMap";
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public static final String POSTFIX_SELECTSQL = ".selectBySql";
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public static final String POSTFIX_COUNT = ".count";
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public static final String POSTFIX_QUERY = ".query";
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/**
* 根据ID获取对象
*/
public <T> T get(Class<T> entityClass, Serializable id) {
T o = (T)getQueryDelegate().queryForObject(
getStatementId(entityClass, IbatisGenericDao.POSTFIX_SELECT),
id,getRoute());
return o;
}
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/**
* 新增对象
*/
public Integer _insert(Object o) {
Integer result = -1;
result = (Integer)getEntityDelegate().insert(
getStatementId(o.getClass(), IbatisGenericDao.POSTFIX_INSERT),
o,getRoute());
return result;
}
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/**
* 保存对象
*/
public Integer _update(Object o) {
Integer result = -1;
result = (Integer)getEntityDelegate().update(
getStatementId(o.getClass(), IbatisGenericDao.POSTFIX_UPDATE),
o,getRoute());
return result;
}
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/**
* 获取总数
* @param entityClass
* @param map
* @return
*/
public Integer _getCount(Class entityClass,HashMap map){
Integer totalCount = (Integer) getQueryDelegate()
.queryForObject(
getStatementId(entityClass,
IbatisGenericDao.POSTFIX_COUNT),
map,getRoute());
return totalCount;
}
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/**
* 根据ID删除对象
*/
public <T> Integer removeById(Class<T> entityClass, Serializable id) {
Integer result = getEntityDelegate().delete(
getStatementId(entityClass,
IbatisGenericDao.POSTFIX_DELETE_PRIAMARYKEY), id,getRoute());
return result;
}
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/**
* 分页查询函数，使用PaginatedList.
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* @param start
* @param limit
* @return 含17117717记录数和当前页数据的Page对象.
*/
public Page pagedQuery(Class entityClass, Map parameterObject, int start,
int limit) {
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Assert.isTrue(start >= 0, "pageNo should start from 0");
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// 计算总数
Integer totalCount = (Integer) getQueryDelegate()
.queryForObject(
getStatementId(entityClass,
IbatisGenericDao.POSTFIX_COUNT),
parameterObject,getRoute());
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// 如果没有数据则返回Empty Page
Assert.notNull(totalCount, "totalCount Error");
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if (totalCount.intValue() == 0) {
return new Page();
}
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List list;
int totalPageCount = 0;
int startIndex = 0;
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// 如果pageSize小于0,则返回所有数捄1177,等同于getAll
if (limit > 0) {
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// 计算页数
totalPageCount = (totalCount / limit);
totalPageCount += ((totalCount % limit) > 0) ? 1 : 0;
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// 计算skip数量
if (totalCount > start) {
startIndex = start;
} else {
startIndex = (totalPageCount - 1) * limit;
}
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if (parameterObject == null)
parameterObject = new HashMap();
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parameterObject.put("startIndex", startIndex);
parameterObject.put("endIndex", limit);
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list = getQueryDelegate()
.queryForList(
getStatementId(entityClass,
IbatisGenericDao.POSTFIX_QUERY),
parameterObject,getRoute());
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} else {
list = getQueryDelegate()
.queryForList(
getStatementId(entityClass,
IbatisGenericDao.POSTFIX_QUERY),
parameterObject,getRoute());
}
return new Page(startIndex, totalCount, limit, list);
}
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/**
* 分页查询函数，使用PaginatedList.
*?
* @param start
* @param limit
* @return 含17117717记录数和当前页数据的Page对象.
*/
public Page pagedQuery(Class entityClass, Map parameterObject, int start,
int limit, String countSqlId, String pageQuerySqlId) {
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Assert.isTrue(start >= 0, "pageNo should start from 0");
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// 计算总数
Integer totalCount = (Integer) getQueryDelegate()
.queryForObject(getStatementId(entityClass, countSqlId),
parameterObject,getRoute());
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// 如果没有数据则返回Empty Page
Assert.notNull(totalCount, "totalCount Error");
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if (totalCount.intValue() == 0) {
return new Page();
}
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List list;
int totalPageCount = 0;
int startIndex = 0;
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// 如果pageSize小于0,则返回所有数捄1177,等同于getAll
if (limit > 0) {
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// 计算页数
totalPageCount = (totalCount / limit);
totalPageCount += ((totalCount % limit) > 0) ? 1 : 0;
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// 计算skip数量
if (totalCount >= start) {
startIndex = start;
} else {
startIndex = (totalPageCount - 1) * limit;
}
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if (parameterObject == null)
parameterObject = new HashMap();
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parameterObject.put("startIndex", startIndex);
parameterObject.put("endIndex", limit);
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list = getQueryDelegate().queryForList(
getStatementId(entityClass, pageQuerySqlId),
parameterObject,getRoute());
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} else {
list = getQueryDelegate().queryForList(
getStatementId(entityClass, pageQuerySqlId),
parameterObject,getRoute());
}
return new Page(startIndex, totalCount, limit, list);
}
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/**
* get statement id in SQL Map file
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* @param entityClass
* ? ? ? ? ? ?entity class
* @param suffix
* ? ? ? ? ? ?suffix
* @return statement id
*/
private String getStatementId(Class entityClass, String suffix) {
String className = entityClass.getName();
String shortName = className.replace(entityClass.getPackage().getName()
+ ".", "");
return shortName.toLowerCase() + suffix;
}
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public <T> List<T> queryForList(Class<T> entityClass, String statementId,
Object parameters) {
return getQueryDelegate().queryForList(
getStatementId(entityClass, statementId), parameters,getRoute());
}
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public <T> T queryForObject(Class<T> entityClass, String statementId,
Object parameters) {
return (T) getQueryDelegate().queryForObject(
getStatementId(entityClass, statementId), parameters,getRoute());
}
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public Integer update(Class entityClass, String statementId, Object parameters) {
Integer result = -1;
result = (Integer)getEntityDelegate().update(
getStatementId(entityClass, statementId), parameters,getRoute());
return result;
}
}
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