/**
* 删除指定个Id的数据
*
* @param id
* @return
*/
public boolean deleteById(Serializable id, Class classz) {
DBTableMeta dbTableMeta = DBTableMetaFactory.getDBTableMeta(classz);
String sql = getSqlAnalyzer().analyzeDeleteByPrimaryKey(dbTableMeta);
printSQL(sql, new Object[] {id});
QueryRunner queryRunner = new QueryRunner();
Connection conn = getDbConnectionFactory().getConnection();
try {
int num = queryRunner.update(conn, sql, id);
if (num == 1) {
return true;
} else if (num == 0) {
return false;
} else {
throw new SQLException("数据删除异常,错误的sql与参数导致删除了" + num + "条数据");
}
} catch (SQLException e) {
throw new RuntimeException("删除数据失败", e);
} finally {
getDbConnectionFactory().releaseConnection(conn);
}
}
/**
* 更新指定Id的数据
*
* @param model
* @return
*/
public boolean update(Object model) {
if (model == null) {
log.warn("更新数据失败,传入的model对象为null");
return false;
}
DBTableMeta dbTableMeta = DBTableMetaFactory.getDBTableMeta(model.getClass());
AnalyzeResult analyzeResult = getSqlAnalyzer().analyzeUpdateByPrimaryKey(dbTableMeta, model);
return doUpdate(analyzeResult);
}
/**
* 根据表达式统计长度
*
* @param example
* @param classz
* @param <T>
* @return
*/
public <T> long countByExample(Example example, Class<T> classz) {
DBTableMeta dbTableMeta = DBTableMetaFactory.getDBTableMeta(classz);
AnalyzeResult analyzeResult = getSqlAnalyzer().analyzeCountByExample(dbTableMeta, example);
printSQL(analyzeResult.getSql(), analyzeResult.getParams());
Connection conn = getDbConnectionFactory().getConnection();
QueryRunner queryRunner = new QueryRunner();
try {
return queryRunner.query(
conn, analyzeResult.getSql(), new ScalarHandler<Long>(1), analyzeResult.getParams());
} catch (SQLException e) {
throw new RuntimeException(e);
} finally {
getDbConnectionFactory().releaseConnection(conn);
}
}
/**
* 查询指定Id的数据
*
* @param id
* @param classz
* @param <T>
* @return
*/
public <T extends Model> T findById(Serializable id, Class<T> classz) {
DBTableMeta dbTableMeta = DBTableMetaFactory.getDBTableMeta(classz);
String sql = getSqlAnalyzer().analyzeSelectByPrimaryKey(dbTableMeta);
printSQL(sql, new Object[] {id});
Connection conn = getDbConnectionFactory().getConnection();
QueryRunner queryRunner = new QueryRunner();
try {
T obj = queryRunner.query(conn, sql, new AnnotationBeanHandler<T>(classz), id);
return obj;
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
getDbConnectionFactory().releaseConnection(conn);
}
}
