在我的Java项目中，我希望允许用户备份和恢复项目SQL Server数据库。
以下是我尝试使用JDBC做的事情，但没有成功：
Statement callback = con.createStatement();
String dbackup = "BACKUP DATABASE databaseName TO DISK = 'Path for the backup file";
if(callBackupDbase != null) {
callBackupDbase.execute(dbackup);
}
如何从Java备份和恢复SQL Server数据库？
答案 0 :(得分：0)
您可以使用SQL Server Management Studio创建计划任务
您可以执行管理/维护计划 或者您从SQL Server代理/作业创建 点击3-5次 你也可以做PowerShell
答案 1 :(得分：0)
使用纯JDBC，您可以使用以下代码。根据您的需要进行修改。
public String dumpDB(DataSource dataSource) {
Connection dbConn = null;
DatabaseMetaData dbMetaData = null;
String columnNameQuote = "\"";
try {
dbConn = dataSource.getConnection();
dbMetaData = dbConn.getMetaData();
}
catch( Exception e ) {
System.err.println("Unable to connect to database: "+e);
return null;
}
try {
StringBuffer result = new StringBuffer();
String catalog = "*";//props.getProperty("catalog");
String schema = "*";//props.getProperty("schemaPattern");
String tables = "*";//props.getProperty("tableName");
// ResultSet rs = dbMetaData.getTables(catalog, schema, tables, null);
// To get all table and schema, we can use null
ResultSet rs = dbMetaData.getTables(null, null, null, null);
if (! rs.next()) {
System.err.println("Unable to find any tables matching: catalog="+catalog+" schema="+schema+" tables="+tables);
rs.close();
} else {
// Right, we have some tables, so we can go to work.
// the details we have are
// TABLE_CAT String => table catalog (may be null)
// TABLE_SCHEM String => table schema (may be null)
// TABLE_NAME String => table name
// TABLE_TYPE String => table type. Typical types are "TABLE", "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY", "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
// REMARKS String => explanatory comment on the table
// TYPE_CAT String => the types catalog (may be null)
// TYPE_SCHEM String => the types schema (may be null)
// TYPE_NAME String => type name (may be null)
// SELF_REFERENCING_COL_NAME String => name of the designated "identifier" column of a typed table (may be null)
// REF_GENERATION String => specifies how values in SELF_REFERENCING_COL_NAME are created. Values are "SYSTEM", "USER", "DERIVED". (may be null)
// We will ignore the schema and stuff, because people might want to import it somewhere else
// We will also ignore any tables that aren't of type TABLE for now.
// We use a do-while because we've already caled rs.next to see if there are any rows
do {
String tableName = rs.getString("TABLE_NAME");
String tableType = rs.getString("TABLE_TYPE");
if ("TABLE".equalsIgnoreCase(tableType)) {
result.append("\n\n-- "+tableName);
result.append("\nCREATE TABLE "+tableName+" (\n");
ResultSet tableMetaData = dbMetaData.getColumns(null, null, tableName, "%");
boolean firstLine = true;
while (tableMetaData.next()) {
if (firstLine) {
firstLine = false;
} else {
// If we're not the first line, then finish the previous line with a comma
result.append(",\n");
}
String columnName = tableMetaData.getString("COLUMN_NAME");
String columnType = tableMetaData.getString("TYPE_NAME");
// WARNING: this may give daft answers for some types on some databases (eg JDBC-ODBC link)
int columnSize = tableMetaData.getInt("COLUMN_SIZE");
String nullable = tableMetaData.getString("IS_NULLABLE");
String nullString = "NULL";
if ("NO".equalsIgnoreCase(nullable)) {
nullString = "NOT NULL";
}
result.append(" "+columnNameQuote+columnName+columnNameQuote+" "+columnType+" ("+columnSize+")"+" "+nullString);
}
tableMetaData.close();
// Now we need to put the primary key constraint
try {
ResultSet primaryKeys = dbMetaData.getPrimaryKeys(catalog, schema, tableName);
// What we might get:
// TABLE_CAT String => table catalog (may be null)
// TABLE_SCHEM String => table schema (may be null)
// TABLE_NAME String => table name
// COLUMN_NAME String => column name
// KEY_SEQ short => sequence number within primary key
// PK_NAME String => primary key name (may be null)
String primaryKeyName = null;
StringBuffer primaryKeyColumns = new StringBuffer();
while (primaryKeys.next()) {
String thisKeyName = primaryKeys.getString("PK_NAME");
if ((thisKeyName != null && primaryKeyName == null)
|| (thisKeyName == null && primaryKeyName != null)
|| (thisKeyName != null && ! thisKeyName.equals(primaryKeyName))
|| (primaryKeyName != null && ! primaryKeyName.equals(thisKeyName))) {
// the keynames aren't the same, so output all that we have so far (if anything)
// and start a new primary key entry
if (primaryKeyColumns.length() > 0) {
// There's something to output
result.append(",\n PRIMARY KEY ");
if (primaryKeyName != null) { result.append(primaryKeyName); }
result.append("("+primaryKeyColumns.toString()+")");
}
// Start again with the new name
primaryKeyColumns = new StringBuffer();
primaryKeyName = thisKeyName;
}
// Now append the column
if (primaryKeyColumns.length() > 0) {
primaryKeyColumns.append(", ");
}
primaryKeyColumns.append(primaryKeys.getString("COLUMN_NAME"));
}
if (primaryKeyColumns.length() > 0) {
// There's something to output
result.append(",\n PRIMARY KEY ");
if (primaryKeyName != null) { result.append(primaryKeyName); }
result.append(" ("+primaryKeyColumns.toString()+")");
}
} catch (SQLException e) {
// NB you will get this exception with the JDBC-ODBC link because it says
// [Microsoft][ODBC Driver Manager] Driver does not support this function
System.err.println("Unable to get primary keys for table "+tableName+" because "+e);
}
result.append("\n);\n");
// Right, we have a table, so we can go and dump it
dumpTable(dbConn, result, tableName);
}
} while (rs.next());
rs.close();
}
dbConn.close();
return result.toString();
} catch (SQLException e) {
e.printStackTrace(); //To change body of catch statement use Options | File Templates.
}
return null;
}
/** dump this particular table to the string buffer */
private static void dumpTable(Connection dbConn, StringBuffer result, String tableName) {
try {
// First we output the create table stuff
PreparedStatement stmt = dbConn.prepareStatement("SELECT * FROM "+tableName);
ResultSet rs = stmt.executeQuery();
ResultSetMetaData metaData = rs.getMetaData();
int columnCount = metaData.getColumnCount();
// Now we can output the actual data
result.append("\n\n-- Data for "+tableName+"\n");
while (rs.next()) {
result.append("INSERT INTO "+tableName+" VALUES (");
for (int i=0; i<columnCount; i++) {
if (i > 0) {
result.append(", ");
}
Object value = rs.getObject(i+1);
if (value == null) {
result.append("NULL");
} else {
String outputValue = value.toString();
outputValue = outputValue.replaceAll("'","\\'");
result.append("'"+outputValue+"'");
}
}
result.append(");\n");
}
rs.close();
stmt.close();
} catch (SQLException e) {
System.err.println("Unable to dump table "+tableName+" because: "+e);
}
}
注意：您必须自己创建DataSource。请查看以下用法示例。
System.out.print(dumpDb(yourDataSource));