完整项目地址：https://github.com/zifeiy/totomi
代码示例：
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import com.anbank.totomi.assist.TimeRecorder;
import com.anbank.totomi.config.TotomiConfigure;
import com.anbank.totomi.po.TotomiTableColumn;
public class DbTransfer {
private Connection connection1;
private Connection connection2;
private long theDataSelectedCount;
private TimeRecorder timeRecorder;
private MySQLRecorder mySQLRecorder;
private EncodingEngine encodingEngine;
public DbTransfer() {
try {
Class.forName(TotomiConfigure.DB2_CLASS_NAME);
connection1 = DriverManager.getConnection(TotomiConfigure.DB2_INST1_URL, TotomiConfigure.DB2_INST1_USERNAME, TotomiConfigure.DB2_INST1_PASSWORD);
connection2 = DriverManager.getConnection(TotomiConfigure.DB2_INST2_URL, TotomiConfigure.DB2_INST2_USERNAME, TotomiConfigure.DB2_INST2_PASSWORD);
theDataSelectedCount = 0;
timeRecorder = new TimeRecorder();
mySQLRecorder = new MySQLRecorder();
mySQLRecorder.forceClean();
encodingEngine = new EncodingEngine();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
private List<String> getAllTableNames() {
try {
List<String> tableNameList = new ArrayList<String>();
DatabaseMetaData databaseMetaData1 = connection1.getMetaData();
ResultSet resultSet = databaseMetaData1.getTables(null, TotomiConfigure.DB2_INST1_SCHEMA, null, new String[] { "TABLE" });
while (resultSet.next()) {
String tableName=resultSet.getString("TABLE_NAME");
tableNameList.add(tableName);
}
return tableNameList;
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
public void handle() {
List<String> tableNameList = this.getAllTableNames();
for (String tableName : tableNameList) {
try {
handleOneTable(tableName);
} catch (Exception e) {
mySQLRecorder.updateFailed(tableName);
}
}
}
public void handleOneTable(String tableName) {
if (mySQLRecorder.CheckSucceedSolved(tableName)) {
return;
}
mySQLRecorder.updateProcessing(tableName);
tableName = tableName.toUpperCase();
List<TotomiTableColumn> columnList = new ArrayList<TotomiTableColumn>();
String checkString = null;
try {
DatabaseMetaData databaseMetaData1 = connection1.getMetaData();
ResultSet resultSet = databaseMetaData1.getColumns(null, TotomiConfigure.DB2_INST1_SCHEMA, tableName, "%");
// DELETE TABLE SQL
String deleteTableSQL = String.format("DROP TABLE %s.%s", TotomiConfigure.DB2_INST2_SCHEMA, tableName);
// CREATE TABLE SQL
String createTableSQL = String.format("CREATE TABLE %s.%s (", TotomiConfigure.DB2_INST2_SCHEMA, tableName);
// SELECT SQL
String selectSQL = "SELECT ";
boolean flag = false;
boolean hasClobOrBlob = false;
while (resultSet.next()) {
if (flag) {
createTableSQL += ",\n\t";
selectSQL += ",";
}
else
createTableSQL += "\n\t";
flag = true;
String columnName = resultSet.getString("COLUMN_NAME");
String typeName = resultSet.getString("TYPE_NAME");
int columnSize = resultSet.getInt("COLUMN_SIZE");
int decimalDigits = resultSet.getInt("DECIMAL_DIGITS");
columnList.add(new TotomiTableColumn(columnName, typeName, columnSize, decimalDigits));
// System.out.println(new TotomiTableColumn(columnName, typeName, columnSize, decimalDigits).toString());
selectSQL += columnName;
String oneColumnDesc = columnName + " " + typeName;
if (typeName.equals("CHARACTER") || typeName.equals("VARCHAR") || typeName.equals("CHAR") || typeName.equals("VARGRAPHIC") || typeName.equals("GRAPHIC")
|| typeName.equals("BLOB") || typeName.equals("CLOB") ) {
oneColumnDesc += "(" + columnSize + ")";
}
else if (typeName.equals("DECIMAL")) {
oneColumnDesc += "(" + columnSize + "," + decimalDigits + ")";
}
else
if (typeName.equals("DATE") || typeName.equals("TIMESTAMP") || typeName.equals("INTEGER") || typeName.equals("SMALLINT") || typeName.equals("BIGINT")) {
;
}
createTableSQL += oneColumnDesc;
// check if contains Clob or Blob
if (typeName.equals("CLOB") || typeName.equals("BLOB")) {
hasClobOrBlob = true;
}
}
createTableSQL += "\n)";
selectSQL += " FROM " + TotomiConfigure.DB2_INST1_SCHEMA + "." + tableName;
// DB2 Inst2 insert
String insertPrefix = "INSERT INTO " + TotomiConfigure.DB2_INST2_SCHEMA + "." + tableName + " (";
for (int i = 0; i < columnList.size(); i ++) {
if (i > 0) {
insertPrefix += ",";
}
TotomiTableColumn column = columnList.get(i);
insertPrefix += column.getColumnName();
}
insertPrefix += ") VALUES (";
// // test
// System.out.println("DEL SQL:\n" + deleteTableSQL);
// System.out.println("CREATE SQL:\n" + createTableSQL);
// System.out.println("SELECT SQL:\n" + selectSQL);
// System.out.println("INSERT Prefix: " + insertPrefix);
Statement statement1 = connection1.createStatement();
Statement statement2 = connection2.createStatement();
try {
statement2.execute(deleteTableSQL);
} catch (com.ibm.db2.jcc.am.SqlSyntaxErrorException e1) {
// System.out.println("删除 " + TotomiConfigure.DB2_INST2_SCHEMA + "." + tableName + " 失败，很有很能是因为没有这个表 !!");
}
statement2.execute(createTableSQL);
resultSet = statement1.executeQuery(selectSQL);
int cnt = 0;
Map<Integer, Clob> tmpClobMap = new HashMap<Integer, Clob>();
// Map<Integer, Blob> tmpBlobMap = new HashMap<Integer, Blob>();
Set<Integer> tmpBlobSet = new HashSet<Integer>();
while (resultSet.next()) {
theDataSelectedCount ++;
if (theDataSelectedCount % 10000 == 0) {
System.out.println("获取 " + theDataSelectedCount + " 条数据，历时：\t" + timeRecorder.getTime() + "\t当前表名称：" + tableName);
}
int bcIdx = 0;
tmpClobMap.clear();
// tmpBlobMap.clear();
tmpBlobSet.clear();
String insertSuffix = "";
for (int i = 0; i < columnList.size(); i ++) {
if (i > 0) {
insertSuffix += ",";
}
TotomiTableColumn column = columnList.get(i);
String typeName = column.getTypeName();
boolean needQuot = false;
if (typeName.equals("CHARACTER") || typeName.equals("VARCHAR") || typeName.equals("CHAR") || typeName.equals("DATE") || typeName.equals("TIMESTAMP")
|| typeName.equals("XML") || typeName.equals("DATE") || typeName.equals("TIME")
|| typeName.equals("VARGRAPHIC") || typeName.equals("GRAPHIC") ) {
needQuot = true;
}
String value = resultSet.getString(column.getColumnName());
if (value == null || value.toUpperCase().equals("NULL")) {
needQuot = false;
}
// CLOB type special judge
if (value != null && column.getTypeName().equals("CLOB")) {
Clob clob = resultSet.getClob(column.getColumnName());
bcIdx ++;
tmpClobMap.put(bcIdx, clob);
value = "?";
}
// BLOB type special judge
if (value != null && column.getTypeName().equals("BLOB")) {
Blob blob = resultSet.getBlob(column.getColumnName());
bcIdx ++;
// tmpBlobMap.put(bcIdx, blob);
tmpBlobSet.add(bcIdx);
value = "?";
File f = new File(String.format(TotomiConfigure.Tmp_Blob_file_Path_Format, bcIdx));
OutputStream out = null ;
out = new FileOutputStream(f) ;
out.write(blob.getBytes(1,(int)blob.length())) ;
out.close() ;
}
insertSuffix += (needQuot ? "'" : "");
if (value != null && (typeName.equals("CHARACTER") || typeName.equals("VARCHAR") || typeName.equals("CHAR"))) {
value = value.trim();
value = encodingEngine.encode(tableName, column.getColumnName(), value);
}
insertSuffix += (value == null ? null : value.replaceAll("'", "''"));
insertSuffix += (needQuot ? "'" : "");
}
insertSuffix += ")";
String insertSQL = insertPrefix + insertSuffix;
// System.out.println("insert SQL: " + insertSQL);
if (hasClobOrBlob) {
PreparedStatement preparedStatement = connection2.prepareStatement(insertSQL);
for (Entry<Integer, Clob> entry : tmpClobMap.entrySet()) {
int tmpIdx = entry.getKey();
Clob clob = entry.getValue();
preparedStatement.setClob(tmpIdx, clob);
}
// for (Entry<Integer, Blob> entry : tmpBlobMap.entrySet()) {
// int tmpIdx = entry.getKey();
// Blob blob = entry.getValue();
// preparedStatement.setBlob(tmpIdx, blob.getBinaryStream());
// }
for (int tmpIdx : tmpBlobSet) {
File f = new File(String.format(TotomiConfigure.Tmp_Blob_file_Path_Format, tmpIdx)) ; // 图片文件
InputStream input = null ;
input = new FileInputStream(f) ;
preparedStatement.setBinaryStream(tmpIdx, input, (int)f.length()) ; // 设置输入流
}
preparedStatement.executeUpdate();
}
else {
checkString = insertSQL;
statement2.addBatch(insertSQL);
// System.out.println(insertSQL);
cnt ++;
if (cnt >= 1) {
cnt = 0;
statement2.executeBatch();
}
}
}
if (cnt > 0) {
statement2.executeBatch();
}
// // for test on real environment because data is too big for me to store !!
// statement2.execute(deleteTableSQL);
mySQLRecorder.updateSucceed(tableName);
} catch (Exception e) {
System.out.println("check String: " + checkString);
mySQLRecorder.updateFailed(tableName);
e.printStackTrace();
}
}
public static void main(String[] args) {
DbTransfer transfer = new DbTransfer();
// transfer.handle("TESTTB001");
// transfer.handleOneTable("act");
// transfer.getAllTableNames();
transfer.handle();
// transfer.handleOneTable("A00003_TH");
}
}