JdbcUtils (H2 Database Engine 2.0.0 API)

java.lang.Object
- org.h2.util.JdbcUtils

```
public class JdbcUtils
extends Object
```
This is a utility class with JDBC helper functions.

字段概要

字段
限定符和类型字段和说明

static JavaObjectSerializer serializer
The serializer to use.

字段
限定符和类型	字段和说明
`static JavaObjectSerializer`	`serializer` The serializer to use.

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`static void`	`addClassFactory(Utils.ClassFactory classFactory)` Add a class factory in order to manage more than one class loader.
`static void`	`closeSilently(Connection conn)` Close a connection without throwing an exception.
`static void`	`closeSilently(ResultSet rs)` Close a result set without throwing an exception.
`static void`	`closeSilently(Statement stat)` Close a statement without throwing an exception.
`static Object`	`deserialize(byte[] data, JavaObjectSerializer javaObjectSerializer)` De-serialize the byte array to an object, eventually using the serializer specified by the connection info.
`static ValueUuid`	`deserializeUuid(byte[] data)` De-serialize the byte array to a UUID object.
`static Connection`	`getConnection(String driver, String url, String user, String password)` Open a new database connection with the given settings.
`static Connection`	`getConnection(String driver, String url, String user, String password, NetworkConnectionInfo networkConnectionInfo, boolean forbidCreation)` Open a new database connection with the given settings.
`static String`	`getDriver(String url)` Get the driver class name for the given URL, or null if the URL is unknown.
`static ResultSet`	`getMetaResultSet(Connection conn, String sql)` Get metadata from the database.
`static boolean`	`isBuiltIn(String sql, String builtIn)` Check is the SQL string starts with a prefix (case insensitive).
`static void`	`load(String url)` Load the driver class for the given URL, if the database URL is known.
`static <Z> Class<Z>`	`loadUserClass(String className)` Load a class, but check if it is allowed to load this class first.
`static void`	`removeClassFactory(Utils.ClassFactory classFactory)` Remove a class factory
`static byte[]`	`serialize(Object obj, JavaObjectSerializer javaObjectSerializer)` Serialize the object to a byte array, using the serializer specified by the connection info if set, or the default serializer.
`static void`	`set(PreparedStatement prep, int parameterIndex, Value value, JdbcConnection conn)` Set a value as a parameter in a prepared statement.
`static String[]`	`split(String s)` Split the string using the space separator into at least 10 entries.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - serializer
```
public static JavaObjectSerializer serializer
```
    The serializer to use.
- 方法详细资料
  - addClassFactory
```
public static void addClassFactory(Utils.ClassFactory classFactory)
```
    Add a class factory in order to manage more than one class loader.
    
    参数:
    
    classFactory - An object that implements ClassFactory
  - removeClassFactory
```
public static void removeClassFactory(Utils.ClassFactory classFactory)
```
    Remove a class factory
    
    参数:
    
    classFactory - Already inserted class factory instance
  - loadUserClass
```
public static <Z> Class<Z> loadUserClass(String className)
```
    Load a class, but check if it is allowed to load this class first. To perform access rights checking, the system property h2.allowedClasses needs to be set to a list of class file name prefixes.
    
    类型参数:
    
    Z - generic return type
    
    参数:
    
    className - the name of the class
    
    返回:
    
    the class object
  - closeSilently
```
public static void closeSilently(Statement stat)
```
    Close a statement without throwing an exception.
    
    参数:
    
    stat - the statement or null
  - closeSilently
```
public static void closeSilently(Connection conn)
```
    Close a connection without throwing an exception.
    
    参数:
    
    conn - the connection or null
  - closeSilently
```
public static void closeSilently(ResultSet rs)
```
    Close a result set without throwing an exception.
    
    参数:
    
    rs - the result set or null
  - getConnection
```
public static Connection getConnection(String driver,
                                       String url,
                                       String user,
                                       String password)
                                throws SQLException
```
    Open a new database connection with the given settings.
    
    参数:
    
    driver - the driver class name
    
    url - the database URL
    
    user - the user name
    
    password - the password
    
    返回:
    
    the database connection
    
    抛出:
    
    SQLException - on failure
  - getConnection
```
public static Connection getConnection(String driver,
                                       String url,
                                       String user,
                                       String password,
                                       NetworkConnectionInfo networkConnectionInfo,
                                       boolean forbidCreation)
                                throws SQLException
```
    Open a new database connection with the given settings.
    
    参数:
    
    driver - the driver class name
    
    url - the database URL
    
    user - the user name or null
    
    password - the password or null
    
    networkConnectionInfo - the network connection information, or null
    
    forbidCreation - whether database creation is forbidden
    
    返回:
    
    the database connection
    
    抛出:
    
    SQLException - on failure
  - getDriver
```
public static String getDriver(String url)
```
    Get the driver class name for the given URL, or null if the URL is unknown.
    
    参数:
    
    url - the database URL
    
    返回:
    
    the driver class name
  - load
```
public static void load(String url)
```
    Load the driver class for the given URL, if the database URL is known.
    
    参数:
    
    url - the database URL
  - serialize
```
public static byte[] serialize(Object obj,
                               JavaObjectSerializer javaObjectSerializer)
```
    Serialize the object to a byte array, using the serializer specified by the connection info if set, or the default serializer.
    
    参数:
    
    obj - the object to serialize
    
    javaObjectSerializer - the object serializer (may be null)
    
    返回:
    
    the byte array
  - deserialize
```
public static Object deserialize(byte[] data,
                                 JavaObjectSerializer javaObjectSerializer)
```
    De-serialize the byte array to an object, eventually using the serializer specified by the connection info.
    
    参数:
    
    data - the byte array
    
    javaObjectSerializer - the object serializer (may be null)
    
    返回:
    
    the object
    
    抛出:
    
    DbException - if serialization fails
  - deserializeUuid
```
public static ValueUuid deserializeUuid(byte[] data)
```
    De-serialize the byte array to a UUID object. This method is called on the server side where regular de-serialization of user-supplied Java objects may create a security hole if object was maliciously crafted. Unlike deserialize(byte[], JavaObjectSerializer), this method does not try to de-serialize instances of other classes.
    
    参数:
    
    data - the byte array
    
    返回:
    
    the UUID object
    
    抛出:
    
    DbException - if serialization fails
  - set
```
public static void set(PreparedStatement prep,
                       int parameterIndex,
                       Value value,
                       JdbcConnection conn)
                throws SQLException
```
    Set a value as a parameter in a prepared statement.
    
    参数:
    
    prep - the prepared statement
    
    parameterIndex - the parameter index
    
    value - the value
    
    conn - the own connection
    
    抛出:
    
    SQLException - on failure
  - getMetaResultSet
```
public static ResultSet getMetaResultSet(Connection conn,
                                         String sql)
                                  throws SQLException
```
    Get metadata from the database.
    
    参数:
    
    conn - the connection
    
    sql - the SQL statement
    
    返回:
    
    the metadata
    
    抛出:
    
    SQLException - on failure
  - isBuiltIn
```
public static boolean isBuiltIn(String sql,
                                String builtIn)
```
    Check is the SQL string starts with a prefix (case insensitive).
    
    参数:
    
    sql - the SQL statement
    
    builtIn - the prefix
    
    返回:
    
    true if yes
  - split
```
public static String[] split(String s)
```
    Split the string using the space separator into at least 10 entries.
    
    参数:
    
    s - the string
    
    返回:
    
    the array

类 JdbcUtils

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

serializer

方法详细资料

addClassFactory

removeClassFactory

loadUserClass

closeSilently

closeSilently

closeSilently

getConnection

getConnection

getDriver

load

serialize

deserialize

deserializeUuid

set

getMetaResultSet

isBuiltIn

split