XUtil学习之DBUtil（九）

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没看上篇博客的请查看XUtil学习之DBUtil（八）

删

（1）delete(Object entity)
删除单个对象

 public void delete(Object entity) throws DbException {        if (!tableIsExist(entity.getClass())) return;        try {            beginTransaction();            execNonQuery(SqlInfoBuilder.buildDeleteSqlInfo(this, entity));            setTransactionSuccessful();        } finally {            endTransaction();        }    }

（2）delete(Class< > entityType, WhereBuilder whereBuilder)
按添加的条件删除特定对象

public void delete(Class<?> entityType, WhereBuilder whereBuilder) throws DbException {        if (!tableIsExist(entityType)) return;        try {            beginTransaction();            execNonQuery(SqlInfoBuilder.buildDeleteSqlInfo(this, entityType, whereBuilder));            setTransactionSuccessful();        } finally {            endTransaction();        }    }

（3）deleteAll(List< > entities)
删除集合中的所有对象

public void deleteAll(List<?> entities) throws DbException {        if (entities == null || entities.size() == 0 || !tableIsExist(entities.get(0).getClass())) return;        try {            beginTransaction();            for (Object entity : entities) {                execNonQuery(SqlInfoBuilder.buildDeleteSqlInfo(this, entity));            }            setTransactionSuccessful();        } finally {            endTransaction();        }    }

（4）deleteAll(Class< > entityType)
根据指定对象类型的数据

 public void deleteAll(Class<?> entityType) throws DbException {        delete(entityType, null);    }

（5）deleteById(Class< > entityType, Object idValue)
删除id为idValue的对象

   public void deleteById(Class<?> entityType, Object idValue) throws DbException {        if (!tableIsExist(entityType)) return;        try {            beginTransaction();            execNonQuery(SqlInfoBuilder.buildDeleteSqlInfo(this, entityType, idValue));            setTransactionSuccessful();        } finally {            endTransaction();        }    }

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