今天就分享代码,大家回去看看研究下!
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* 功能:备份以及还原mysql数据库
* 需要将mysql安装的bin目录C:\Program Files\MySQL\MySQL Server 5.5\bin设置到环境变量,否则不知道怎么调用mysqldump[⊙﹏⊙b汗]
* 用java备份的话,不能使用">"了,所以调用cmd命令时,需要更改里面的参数
* mysqldump -h127.0.0.1 -uroot -proot erp > backupfile.sql
* mysqldump -h 127.0.0.1 -u root -proot erp --default-character-set=utf8 --result-file=D:backupfile.sql
* @author Administrator
*
*/
public class mysql {
/**
* 备份mysql数据库
* @param root mysql登录名
* @param rootPass 登录密码
* @param dbName 要备份的数据库名称
* @param backupsPath 备份的路径
* @param backupsSqlFileName 备份文件的名字
* @return
*/
public static String dbBackUp(String root,String rootPass,String dbName,String backupsPath,String backupsSqlFileName)
{
//生成临时备份文件
// SimpleDateFormat sd=new SimpleDateFordckupsSqlFileName;
String pathSql = backupsPath+backupsSqlFileName;
try {
File fileSql = new File(pathSql);
if(!fileSql.exists()){
fileSql.createNewFile();
}
StringBuffer sbs = new StringBuffer();
sbs.append("mysqldump ");
sbs.append(" -h 127.0.0.1 ");
sbs.append(" -u ");
sbs.append(root+" ");
sbs.append("-p"+rootPass+" ");
sbs.append(dbName);
sbs.append(" --default-character-set=utf8 ");
// sbs.append(">"+pathSql);
sbs.append(" --result-file="+pathSql);
System.out.println("cmd命令为:——>>>"+sbs.toString());
Runtime runtime = Runtime.getRuntime();
Process child = runtime.exec(sbs.toString());
//读取备份数据并生成临时文件
InputStream in = child.getInputStream();
OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(pathSql), "utf8");
BufferedReader reader = new BufferedReader(new InputStreamReader(in, "utf8"));
String line=reader.readLine();
while (line != null) {
writer.write(line+"\n");
line=reader.readLine();
}
writer.flush();
System.out.println("数据库已备份到——>>"+pathSql);
} catch (Exception e) {
}
return pathSql;
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
//mysqldump -h 192.168.110.10 --user=root --password=fortune123 --lock-all-tables=true --result-file=D:tt.sql\ --default-character-set=utf8 ERP
SimpleDateFormat sd=new SimpleDateFormat("yyyyMMddHHmmss");
String root = "root";
String rootPass = "root";
String dbName = "erp";
String backupsPath = "D:";
String backupsSqlFileName = "erpDB_"+sd.format(new Date())+".sql";
dbBackUp(root, rootPass, dbName, backupsPath, backupsSqlFileName);
backup();
load();
}
/**
* 备份erp数据库到D:db.sql
* @return
*/
public static boolean backup() {//备份
try {
Runtime rt = Runtime.getRuntime();
String mysql = "mysqldump -uroot -proot erp --default-character-set=utf8 ";
// mysql ="C:\\Program Files\\MySQL\\MySQL Server 5.5\\bin\\"+mysql;
System.out.println("mysql=============>>>>"+mysql);
// 调用 mysql 的 cmd:
Process child = rt
.exec("cmd /c "+mysql);// 设置导出编码为utf8。这里必须是utf8
// 把进程执行中的控制台输出信息写入.sql文件,即生成了备份文件。注:如果不对控制台信息进行读出,则会导致进程堵塞无法运行
InputStream in = child.getInputStream();// 控制台的输出信息作为输入流
InputStreamReader xx = new InputStreamReader(in, "utf8");// 设置输出流编码为utf8。这里必须是utf8,否则从流中读入的是乱码
String inStr;
StringBuffer sb = new StringBuffer("");
String outStr;
// 组合控制台输出信息字符串
BufferedReader br = new BufferedReader(xx);
while ((inStr = br.readLine()) != null) {
sb.append(inStr + "\r\n");
}
outStr = sb.toString();
// 要用来做导入用的sql目标文件:
FileOutputStream fout = new FileOutputStream(
"D:/db.sql");
OutputStreamWriter writer = new OutputStreamWriter(fout, "utf8");
writer.write(outStr);
// 注:这里如果用缓冲方式写入文件的话,会导致中文乱码,用flush()方法则可以避免
writer.flush();
// 别忘记关闭输入输出流
in.close();
xx.close();
br.close();
writer.close();
fout.close();
System.out.println("/* Output OK! */");
String error="备份成功!";
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
/**
* 还原D:db.sql到erp数据库
* @return
*/
public static boolean load() {//还原
try {
String fPath = "D:/db.sql";
Runtime rt = Runtime.getRuntime();
// 调用 mysql 的 cmd:
Process child = rt.exec("mysql -uroot -proot erp ");
OutputStream out = child.getOutputStream();//控制台的输入信息作为输出流
String inStr;
StringBuffer sb = new StringBuffer("");
String outStr;
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(fPath), "utf8"));
while ((inStr = br.readLine()) != null) {
sb.append(inStr + "\r\n");
}
outStr = sb.toString();
OutputStreamWriter writer = new OutputStreamWriter(out, "utf8");
writer.write(outStr);
// 注:这里如果用缓冲方式写入文件的话,会导致中文乱码,用flush()方法则可以避免
writer.flush();
// 别忘记关闭输入输出流
out.close();
br.close();
writer.close();
System.out.println("/* Load OK! */");
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
}