org.pinus4j.datalayer

Class SQLBuilder

java.lang.Object

org.pinus4j.datalayer.SQLBuilder

public class SQLBuilder
extends Object

SQL工具类.

Author:

duanbn

Field Summary

Fields

Modifier and Type	Field and Description
private static Map<String,String>	_selectCountCache select count语句缓存.
static org.slf4j.Logger	LOG
private static SimpleDateFormat	sdf

Constructor Summary

Constructors

Constructor and Description
SQLBuilder()

Method Summary

Modifier and Type	Method and Description
private static Object	_getRsValue(ResultSet rs, Field f, int i)
static String	buildDeleteByPks(Class<?> clazz, int tableIndex, List<? extends Number> pks) 拼装sql.
static <T> List<T>	buildResultObject(Class<T> clazz, ResultSet rs) 给定数据库查询结果集创建数据对性.
static List<Map<String,Object>>	buildResultObject(ResultSet rs) 给定数据库查询结果集创建数据对性.
static <T> Map<Number,T>	buildResultObjectAsMap(Class<T> clazz, ResultSet rs) 将数据转换为数据对象
static String	buildSelectByPk(Number pk, Class<?> clazz, int tableIndex) 拼装select sql.
static String	buildSelectByPks(Class<?> clazz, int tableIndex, Number[] pks) 拼装select sql.
static String	buildSelectByQuery(Class<?> clazz, int tableIndex, IQuery query) 拼装sql.
static PreparedStatement	buildSelectBySql(Connection conn, SQL sql, int tableIndex) 拼装sql.
static PreparedStatement	buildSelectBySqlGlobal(Connection conn, SQL sql)
static String	buildSelectCountByQuery(Class<?> clazz, int tableIndex, IQuery query)
static String	buildSelectCountGlobalSql(Class<?> clazz)
static String	buildSelectCountGlobalSql(Class<?> clazz, IQuery query)
static String	buildSelectCountSql(Class<?> clazz, int tableIndex) 拼装sql.
static String	buildSelectPkByQuery(Class<?> clazz, int tableIndex, IQuery query) 拼装sql.
static void	close(Connection conn) 关闭数据相关资源.
static void	close(Connection conn, PreparedStatement ps) 关闭数据库相关资源.
static void	close(Connection conn, PreparedStatement ps, ResultSet rs) 关闭数据库相关资源.
static void	close(Statement st) 关闭数据库Statement.
static void	debugSQL(String sql) 打印SQL日志.
static Object	formatValue(Object value) 格式化数据库值.
static Statement	getInsert(Connection conn, List<? extends Object> entities, int tableIndex) 根据指定对象创建一个SQL语句.
static Statement	getUpdate(Connection conn, List<? extends Object> entities, int tableIndex) 获取update PreparedStatement.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

public static final org.slf4j.Logger LOG

_selectCountCache

private static final Map<String,String> _selectCountCache

select count语句缓存.

sdf

private static final SimpleDateFormat sdf

Constructor Detail

SQLBuilder

public SQLBuilder()

Method Detail

buildSelectPkByQuery

public static String buildSelectPkByQuery(Class<?> clazz,
                                          int tableIndex,
                                          IQuery query)

拼装sql. SELECT pkName FROM tableName {IQuery.getSql()}

Returns:

sql语句.

buildSelectByQuery

public static String buildSelectByQuery(Class<?> clazz,
                                        int tableIndex,
                                        IQuery query)

拼装sql. SELECT {fields} FROM tableName {IQuery.getSql()}

Returns:

sql语句.

buildSelectCountByQuery

public static String buildSelectCountByQuery(Class<?> clazz,
                                             int tableIndex,
                                             IQuery query)

buildSelectBySqlGlobal

public static PreparedStatement buildSelectBySqlGlobal(Connection conn,
                                                       SQL sql)
                                                throws SQLException

Throws:

SQLException

buildSelectBySql

public static PreparedStatement buildSelectBySql(Connection conn,
                                                 SQL sql,
                                                 int tableIndex)
                                          throws SQLException

拼装sql. 根据SQL对象生成查询语句, 此sql语句不能包含limit

Parameters:

conn - 数据库连接

sql - 查询对象

tableIndex - 分表下标

Returns:

PreparedStatement

Throws:

SQLException

buildSelectCountGlobalSql

public static String buildSelectCountGlobalSql(Class<?> clazz)

buildSelectCountGlobalSql

public static String buildSelectCountGlobalSql(Class<?> clazz,
                                               IQuery query)

buildSelectCountSql

public static String buildSelectCountSql(Class<?> clazz,
                                         int tableIndex)

拼装sql. SELECT count(*) FROM tableName

Parameters:

clazz - 数据对象class

tableIndex - 分表下标

Returns:

SELECT count(*) FROM tableName

buildResultObject

public static List<Map<String,Object>> buildResultObject(ResultSet rs)
                                                  throws SQLException

给定数据库查询结果集创建数据对性.

Parameters:

rs - 数据库查询结果集

Returns:

数据对象列表

Throws:

SQLException

buildResultObject

public static <T> List<T> buildResultObject(Class<T> clazz,
                                            ResultSet rs)
                                     throws SQLException

给定数据库查询结果集创建数据对性.

Parameters:

clazz - 数据对象class

rs - 数据库查询结果集

Returns:

数据对象列表

Throws:

SQLException

buildResultObjectAsMap

public static <T> Map<Number,T> buildResultObjectAsMap(Class<T> clazz,
                                                       ResultSet rs)
                                                throws SQLException

将数据转换为数据对象

Parameters:

clazz - 数据对象

rs - 结果集

Returns:

{pkValue, Object}

Throws:

SQLException

_getRsValue

private static Object _getRsValue(ResultSet rs,
                                  Field f,
                                  int i)
                           throws SQLException

Throws:

SQLException

buildSelectByPks

public static String buildSelectByPks(Class<?> clazz,
                                      int tableIndex,
                                      Number[] pks)

拼装select sql. SELECT field, field FROM tableName WHERE pk in (?, ?, ?)

Parameters:

clazz - 数据对象

tableIndex - 表下标

pks - 主键

query - 保证in顺序

Returns:

sql语句

buildSelectByPk

public static String buildSelectByPk(Number pk,
                                     Class<?> clazz,
                                     int tableIndex)
                              throws SQLException

拼装select sql. SELECT field... FROM tableName WHERE pk = ?

Parameters:

pk - 主键

clazz - 数据对象class

tableIndex - 表下标

Returns:

sql语句

Throws:

SQLException

buildDeleteByPks

public static String buildDeleteByPks(Class<?> clazz,
                                      int tableIndex,
                                      List<? extends Number> pks)

拼装sql. DELETE FROM tableName WHERE pk in (...)

Returns:

DELETE语句

getUpdate

public static Statement getUpdate(Connection conn,
                                  List<? extends Object> entities,
                                  int tableIndex)
                           throws SQLException

获取update PreparedStatement.

Parameters:

conn - 数据库连接

entities - 数据对象

tableIndex - 分表下标

Returns:

PreparedStatement

Throws:

SQLException

getInsert

public static Statement getInsert(Connection conn,
                                  List<? extends Object> entities,
                                  int tableIndex)
                           throws SQLException

根据指定对象创建一个SQL语句.

Parameters:

conn - 数据库连接引用

entities - 数据对象

tableIndex - 分表下标

Returns:

SQL语句

Throws:

操作失败

SQLException

formatValue

public static Object formatValue(Object value)

格式化数据库值. 过滤特殊字符

close

public static void close(Connection conn)

关闭数据相关资源.

Parameters:

conn - 数据库连接

close

public static void close(Connection conn,
                         PreparedStatement ps)

关闭数据库相关资源.

Parameters:

conn - 数据库连接

ps - PreparedStatement对象

close

public static void close(Statement st)

关闭数据库Statement.

close

public static void close(Connection conn,
                         PreparedStatement ps,
                         ResultSet rs)

关闭数据库相关资源.

Parameters:

conn - 数据库连接

ps - PreparedStatement对象

rs - 查询结果集

debugSQL

public static void debugSQL(String sql)

打印SQL日志.