java代码执行mysql的数据备份和批量数据插入！

mysql数据库本身有数据备份和批量数据插入的命令，java代码可执行这些命令。

安装mysql后，需要设置环境变量：我的电脑右击--属性--高级--环境变量，增加MYSQL_HOME=“mysql安装路径”，然后path=%MYSQL_HOME%/bin

 

代码如下：

 

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

 

public class OperateDb {

private String user;

private String password;

private String filePath;

private String dbip;

 

//备份数据

public void backup() {

try {

Runtime rt = Runtime.getRuntime();

//形成cmd命令

String cmd = "mysqldump -u"+user+" -p"+password+" -h"+dbip+" --set-charset=utf8 -t --no-create-info recommend movieinfo";

 

// 调用 mysql 的 cmd,设置导出编码为utf8。这里必须是utf8

Process child = rt.exec(cmd);

 

// 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

// 控制台的输出信息作为输入流

InputStream in = child.getInputStream();

 

// 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

InputStreamReader xx = new InputStreamReader(in, "utf8");

 

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(filePath);

OutputStreamWriter writer = new OutputStreamWriter(fout, "utf8");

writer.write(outStr);

//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();

 

//关闭输入输出流

in.close();

xx.close();

br.close();

writer.close();

fout.close();

 

System.out.println("数据成功备份到"+filePath);

 

} catch (Exception e) {

e.printStackTrace();

}

}

//导入数据

public void load() {

try {

Runtime rt = Runtime.getRuntime();

//形成cmd命令

String cmd = "mysql -u"+user+" -p"+password+" -h"+dbip+" recommend";

 

// 调用 mysql 的 cmd:

Process child = rt.exec(cmd);

// 控制台的输入信息作为输出流

OutputStream out = child.getOutputStream();

String inStr;

StringBuffer sb = new StringBuffer("");

String outStr;

BufferedReader br = new BufferedReader(new InputStreamReader(

new FileInputStream(filePath), "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("批量导入成功！");

} catch (Exception e) {

e.printStackTrace();

}

 

}

 

public String getUser() {

return user;

}

 

 

public void setUser(String user) {

this.user = user;

}

 

 

public String getPassword() {

return password;

}

 

 

public void setPassword(String password) {

this.password = password;

}

public String getFilePath() {

return filePath;

}

 

 

public void setFilePath(String filePath) {

this.filePath = filePath;

}

 

public String getDbip() {

return dbip;

}

 

public void setDbip(String dbip) {

this.dbip = dbip;

}

}