1.最近开发java 备份数据库功能发现网上都是通过oracle客户端进行备份，部署项目的服务器还装oracle服务端那不是太麻烦了,mysql 也是通过客户端实现,
我折腾了好久终于不用客户端实现
实现环境为spring boot,实现方法如下：
@Service
public class BackUpDoServiceImpl extends ServiceImpl<BackUpDoMapper, BackUpDo> implements BackUpDoService {
Logger logger = LoggerFactory.getLogger(BackUpDoServiceImpl.class);
@Value("${spring.datasource.driverClassName}")
private String jdbcDriver;
@Value("${spring.datasource.druid.first.url}")
private String jdbcUrl;
@Resource
private UploadProperties uploadProperties;
@Value("${spring.datasource.druid.first.username}")
private String jdbcUserName;
@Value("${spring.datasource.druid.first.password}")
private String jdbcPassword;
private String orcaleSQL = "SELECT DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, U.object_name), U.OBJECT_TYPE "
+ "FROM USER_OBJECTS U "
+ "where U.OBJECT_TYPE = 'TABLE' "
+ "or U.OBJECT_TYPE = 'VIEW' "
+ "or U.OBJECT_TYPE = 'INDEX' "
+ "or U.OBJECT_TYPE = 'PROCEDURE' "
+ "or U.OBJECT_TYPE = 'SEQUENCE' "
+ "or U.OBJECT_TYPE = 'TRIGGER' " + "order by U.OBJECT_TYPE desc";
@Override
public String backupData() throws IOException, ClassNotFoundException, SQLException {
File file=new File(uploadProperties.getBasePath());
if(!file.exists()){
file.mkdir();
}
Format f = new SimpleDateFormat("yyyyMMddHmmss");
Date date = new Date();
//oracle备份模式
if (jdbcDriver.contains("oracle")) {
String tablesFile = "";
String sequencesFile = "";
String indexsFile = "";
String createTableStr=f.format(date) + "oracle创表.sql";
String dataStr=f.format(date) + "oracle数据" + ".sql";
File dataFile=null;
StringBuilder fwT = new StringBuilder();
StringBuilder fwS = new StringBuilder();
StringBuilder fwI = new StringBuilder();
File outFile=null;
Class.forName(jdbcDriver);
Connection con = DriverManager.getConnection(jdbcUrl, jdbcUserName, jdbcPassword);
Statement statement = con.createStatement();
ResultSet rs = statement.executeQuery(orcaleSQL);
outFile = new File(uploadProperties.getBasePath() + "/" + createTableStr);
if (!outFile.exists()) {
/* 创建文件夹*/
outFile.createNewFile();
}
FileWriter fw = new FileWriter(outFile, true);
while (rs.next()) {
Clob ddl = rs.getClob(1);
String objectName = rs.getString(2);
String ddlStr = ddl.getSubString(1L, (int) ddl.length());
if ("TABLE".equals(objectName)) {
fwT.append(ddlStr).append("\r\n");
;
}
if ("SEQUENCE".equals(objectName)) {
fwS.append(ddlStr).append("\r\n");
;
}
if ("INDEX".equals(objectName)) {
fwI.append(ddlStr).append("\r\n");
;
}
}
fw.write("---创表脚本---\r\n");
fw.write(fwT.toString());
fw.write("---序列脚本---\r\n");
fw.write(fwS.toString());
fw.write("---索引脚本---\r\n");
fw.write(fwI.toString());
fw.flush();
fw.close();
DatabaseMetaData dbmd = con.getMetaData();
/*getTables获取表对象时用户名必须为大写*/
String dbUserNameStr = jdbcUserName.toUpperCase();
rs = dbmd.getTables("null", dbUserNameStr, "%", new String[]{"TABLE"});
List<String> tableNames = new ArrayList<>();
while (rs.next()) {
String tableName = rs.getString("TABLE_NAME");
tableNames.add(tableName);
}
if (tableNames != null && tableNames.size() > 0) {
dataFile = new File(uploadProperties.getBasePath() + "/" + dataStr);
if (!dataFile.exists()) {
/* 创建文件*/
dataFile.createNewFile();
}
FileWriter dataFw = new FileWriter(dataFile, true);
for (String str : tableNames) {
StringBuilder datWt = new StringBuilder();
try {
String insertSqlStr = SqlUtils.genOracleInsertInto(str, "", statement);
dataFw.write(insertSqlStr);
} catch (Exception e) {
e.printStackTrace();
}
}
dataFw.flush();
dataFw.close();
}
rs.close();
statement.close();
con.close();
/** 压缩方法2 */
List<File> fileList = new ArrayList<>();
if(dataFile!=null){
fileList.add(dataFile);
}
if(outFile!=null){
fileList.add(outFile);
}
FileOutputStream fos2 = new FileOutputStream(new File(uploadProperties.getBasePath()+f.format(date)+"oracle数据"+".zip"));
try {
FileUtils.toZip(fileList, fos2);
dataFile.delete();
outFile.delete();
fos2.close();
}catch (Exception ex){
logger.error("压缩mysql脚本失败"+ex.toString());
return "";
}
return uploadProperties.getBasePath()+f.format(date)+"oracle数据"+".zip";
}
if(jdbcDriver.contains("mysql")){
File dataFile=null;
Class.forName(jdbcDriver);
Connection con = DriverManager.getConnection(jdbcUrl, jdbcUserName, jdbcPassword);
Statement statement = con.createStatement();
DatabaseMetaData dbmd = con.getMetaData();
String dbName="";
Integer index=jdbcUrl.lastIndexOf("/");
String before=jdbcUrl.substring(0,index);
String after=jdbcUrl.substring(index+1);
if(after.contains("?")){
index=after.lastIndexOf("?");
dbName=after.substring(0,index);
}
con.getMetaData().getDatabaseProductName();
ResultSet rs = dbmd.getTables(dbName, null, null, new String[] { "TABLE" });
List<String> tableNames = new ArrayList<>();
while (rs.next()) {
String tableName = rs.getString("TABLE_NAME");
tableNames.add(tableName);
}
if (tableNames != null && tableNames.size() > 0) {
dataFile = new File(uploadProperties.getBasePath() + "/" + f.format(date) + "mysql数据" + ".sql");
if (!dataFile.exists()) {
/* 创建文件*/
dataFile.createNewFile();
}
FileWriter dataFw = new FileWriter(dataFile, true);
for (String str : tableNames) {
StringBuilder datWt = new StringBuilder();
try {
String insertSqlStr = SqlUtils.getMysqlInsertSql(statement, str, "");
dataFw.write(insertSqlStr);
} catch (Exception e) {
e.printStackTrace();
}
}
dataFw.flush();
dataFw.close();
}
rs.close();
statement.close();
con.close();
/** 压缩方法2 */
List<File> fileList = new ArrayList<>();
if(dataFile!=null){
fileList.add(dataFile);
}
FileOutputStream fos2 = new FileOutputStream(new File(uploadProperties.getBasePath()+f.format(date)+"mysql数据"+".zip"));
try {
FileUtils.toZip(fileList, fos2);
dataFile.delete();
fos2.close();
}catch (Exception ex){
logger.error("压缩mysql脚本失败"+ex.toString());
return "";
}
return uploadProperties.getBasePath()+f.format(date)+"mysql数据"+".zip";
}
return "";
}
核心代码：Sqlutils代码如下：
* Copyright
*
* @author chenwenchao
* @date 2018/11/15 0015
* Description:
*/
public class SqlUtils {
/**
* oracle生成插入语句语句
*
* @param tableName
* @param whereSql
* @param stmt
* @return
*/
public static String genOracleInsertInto(String tableName, String whereSql, Statement stmt) {
ResultSet results = null;
if (tableName.equals(null)) {
return "/* No table! */\n";
}
// 存放表属性名
String[] columnNames;
// 存放一条记录的值
String[] oneRowData;
String insertOneTalbeDatas = null;
// 查询结果属性
ResultSetMetaData rsma = null;
// 列数
int numCols = 0;
// 行数
int numRows = 0;
// 查询语句内容
String queryStr = "SELECT * FROM " + tableName;
if (whereSql != null && whereSql.length() > 0) {
queryStr = queryStr + " where " + whereSql;
}
try {
// 获取一个查询结果集为一张表的内容
results = stmt.executeQuery(queryStr);
// 表的记录数
numRows = 0;
boolean more = results.next();
while (more) {
numRows++;
more = results.next();
}
// 初始化获取查询记录集属性
rsma = results.getMetaData();
// 初始化表的列数
numCols = rsma.getColumnCount();
columnNames = new String[numCols];
// 初始化获取列名
for (int i = 0; i < numCols; i++) {
columnNames[i] = new String(rsma.getColumnName(i + 1));
}
// 初始化存放一条记录的数据
oneRowData = new String[numCols];
} catch (Exception e) {
String warning = "/* Not found the table: " + tableName + "! */\n";
System.out.println("three" + e.getMessage());
return warning;
}
try {
// 获取一个查询结果集为一张表的内容
results = stmt.executeQuery(queryStr);
// 初始化获取查询记录集属性
rsma = results.getMetaData();
//获取记录的内容
StringBuffer insertAllRows = new StringBuffer();
boolean more = results.next();
int rowCounts = 0;
while (more) {
for (int i = 1; i <= numCols; i++) {
oneRowData[i - 1] = results.getString(i);
}
insertAllRows.append("insert into " + tableName.trim() + " (");
for (int i = 0; i < numCols; i++) {
if (i != 0) {
insertAllRows.append(',');
}
insertAllRows.append(columnNames[i]);
}
insertAllRows.append(") values (");
String columnType = "";
for (int i = 0; i < numCols; i++) {
if (i != 0) {
insertAllRows.append(',');
}
columnType = rsma.getColumnTypeName(i + 1);
columnType = columnType.toUpperCase();
if (columnType.indexOf("VAR") >= 0 ||
columnType.indexOf("CHAR") >= 0 ||
columnType.indexOf("DATE") >= 0 ||
columnType.indexOf("TIME") >= 0 ||
columnType.indexOf("TEXT") >= 0 ||
columnType.indexOf("BINARY") >= 0) {
if (columnType.indexOf("DATE") >= 0) {
// String NotNull="TO_DATE(\'" + oneRowData[i].trim() + "', 'YYYY-MM-DD HH24:MI:SS')";
insertAllRows.append("" +
((oneRowData[i] == null ||
oneRowData[i].length() == 0) ? "NULL" :
"TO_DATE(\'" + oneRowData[i].trim() + "', 'YYYY-MM-DD HH24:MI:SS')"));
} else {
insertAllRows.append("'" +
((oneRowData[i] == null ||
oneRowData[i].length() == 0) ? "" :
oneRowData[i].trim()) + "'");
}
} else {
insertAllRows.append(((oneRowData[i] == null ||
oneRowData[i].length() == 0) ? "\'\'" :
oneRowData[i]));
}
}
insertAllRows.append(");\n");
more = results.next();
}
results.close();
if (insertAllRows.length() != 0) {
insertOneTalbeDatas = new String(insertAllRows);
} else {
insertOneTalbeDatas = "/* Not found data in the table: " + tableName +
"! */\n";
}
insertAllRows.delete(0, insertAllRows.length() - 1);
} catch (Exception e) {
String warning = "/* Not found the table: " + tableName + "! */\n";
System.out.println("four");
e.printStackTrace();
return warning;
}
return insertOneTalbeDatas;
}
/**
* 插入sql
*/
private static String insert = "INSERT INTO";
/**
* values关键字
*/
private static String values = "VALUES";
/**
*
* @param stmt
* @param tableName
* @param whereSql
* @return
* @throws SQLException
*/
public static String getMysqlInsertSql(Statement stmt, String tableName, String whereSql)
throws SQLException {
ResultSet results = null;
if (tableName.equals(null)) {
return "/* No table! */\n";
}
// 查询语句内容
String queryStr = "SELECT * FROM " + tableName;
if (whereSql != null && whereSql.length() > 0) {
queryStr = queryStr + " where " + whereSql;
}
System.out.println(queryStr);
StringBuffer insertSQL = new StringBuffer();
try {
// 获取一个查询结果集为一张表的内容
results = stmt.executeQuery(queryStr);
ResultSetMetaData rsmd = results.getMetaData();
int columnCount = rsmd.getColumnCount();
while (results.next()) {
StringBuffer columnName = new StringBuffer();
StringBuffer columnValue = new StringBuffer();
for (int i = 1; i <= columnCount; i++) {
String value = results.getString(i);
if (i == columnCount) {
columnName.append(rsmd.getColumnName(i));
if (Types.CHAR == rsmd.getColumnType(i) || Types.VARCHAR == rsmd.getColumnType(i) || Types.LONGVARCHAR == rsmd.getColumnType(i)) {
if (value == null) {
columnValue.append("null");
} else {
columnValue.append("'").append(value).append("'");
}
} else if (Types.SMALLINT == rsmd.getColumnType(i) || Types.INTEGER == rsmd.getColumnType(i) || Types.BIGINT == rsmd.getColumnType(i) || Types.FLOAT == rsmd.getColumnType(i) || Types.DOUBLE == rsmd.getColumnType(i) || Types.NUMERIC == rsmd.getColumnType(i) || Types.DECIMAL == rsmd.getColumnType(i)) {
if (value == null) {
columnValue.append("null");
} else {
columnValue.append(value);
}
} else if (Types.DATE == rsmd.getColumnType(i) || Types.TIME == rsmd.getColumnType(i) || Types.TIMESTAMP == rsmd.getColumnType(i)) {
if (value == null) {
columnValue.append("null");
} else {
//append("timestamp'")
columnValue.append(value).append("'");
}
} else {
if (value == null) {
columnValue.append("null");
} else {
columnValue.append(value);
}
}
} else {
columnName.append(rsmd.getColumnName(i) + ",");
if (Types.CHAR == rsmd.getColumnType(i) || Types.VARCHAR == rsmd.getColumnType(i) || Types.LONGVARCHAR == rsmd.getColumnType(i)) {
if (value == null) {
columnValue.append("null,");
} else {
columnValue.append("'").append(value).append("',");
}
} else if (Types.SMALLINT == rsmd.getColumnType(i) || Types.INTEGER == rsmd.getColumnType(i) || Types.BIGINT == rsmd.getColumnType(i) || Types.FLOAT == rsmd.getColumnType(i) || Types.DOUBLE == rsmd.getColumnType(i) || Types.NUMERIC == rsmd.getColumnType(i) || Types.DECIMAL == rsmd.getColumnType(i)) {
if (value == null) {
columnValue.append("null,");
} else {
columnValue.append(value).append(",");
}
} else if (Types.DATE == rsmd.getColumnType(i) || Types.TIME == rsmd.getColumnType(i) || Types.TIMESTAMP == rsmd.getColumnType(i)) {
if (value == null) {
columnValue.append("null,");
} else {
//append("timestamp'")
columnValue.append(value).append("',");
}
} else {
if (value == null) {
columnValue.append("null,");
} else {
columnValue.append(value).append(",");
}
}
}
}
insertSQL.append(insert).append(" ").append(tableName).append("(").append(columnName.toString()) .append(")").append(values).append("(").append(columnValue.toString()).append(");\n");
}
} catch (Exception e) {
String warning = "/* Not found the table: " + tableName + "! */\n";
System.out.println("three" + e.getMessage());
return warning;
}
return insertSQL.toString();
}
}
压缩工具类FileUtils也提供给大家
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import java.util.zip.ZipOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
/**
* Copyright
*
* @author chenwenchao
* @date 2018/11/15 0015
* Description:
*/
public class FileUtils {
private static final int BUFFER_SIZE = 2 * 1024;
/**
* 压缩成ZIP 方法2
* @param srcFiles 需要压缩的文件列表
* @param out 压缩文件输出流
* @throws RuntimeException 压缩失败会抛出运行时异常
*/
public static void toZip(List<File> srcFiles , OutputStream out)throws RuntimeException {
long start = System.currentTimeMillis();
ZipOutputStream zos = null ;
try {
zos = new ZipOutputStream(out);
for (File srcFile : srcFiles) {
byte[] buf = new byte[BUFFER_SIZE];
zos.putNextEntry(new ZipEntry(srcFile.getName()));
int len;
FileInputStream in = new FileInputStream(srcFile);
while ((len = in.read(buf)) != -1){
zos.write(buf, 0, len);
}
zos.closeEntry();
in.close();
}
long end = System.currentTimeMillis();
System.out.println("压缩完成，耗时：" + (end - start) +" ms");
} catch (Exception e) {
throw new RuntimeException("zip error from ZipUtils",e);
}finally{
if(zos != null){
try {
zos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
目前oracle只是实现普通创建表脚本，其中表的字段加注释还没实现，没想到好法子，备份数据脚本，mysql实现备份数据
