java jdbc使用SSH隧道连接mysql数据库demo

java jdbc使用SSH隧道连接mysql数据库demo

 

本文链接：https://blog.csdn.net/earbao/article/details/50216999

1.  
   package com.yws.echo_socket;
2.  
    
3.  
    
4.  
   import com.jcraft.jsch.JSch;
5.  
   import com.jcraft.jsch.Session;
6.  
    
7.  
   import java.sql.*;
8.  
    
9.  
   //http://my.oschina.net/Thinkeryjgfn/blog/177283
10.  
    //http://www.cnblogs.com/I-will-be-different/p/3925351.html?utm_source=tuicool&utm_medium=referral
11.  
    //java jdbc使用SSH隧道连接mysql数据库demo
12.  
    public class ChangeDB {
13.  
     
14.  
     
15.  
     
16.  
    public static void go() {
17.  
    try {
18.  
    JSch jsch = new JSch();
19.  
    Session session = jsch.getSession("yunshouhu", "192.168.0.102", 22);
20.  
    session.setPassword("xxxx");
21.  
    session.setConfig("StrictHostKeyChecking", "no");
22.  
    session.connect();
23.  
    System.out.println(session.getServerVersion());//这里打印SSH服务器版本信息
24.  
     
25.  
    //ssh -L 192.168.0.102:5555:192.168.0.101:3306 yunshouhu@192.168.0.102 正向代理
26.  
    int assinged_port = session.setPortForwardingL("192.168.0.101",5555, "192.168.0.101", 3306);//端口映射 转发
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28.  
    System.out.println("localhost:" + assinged_port);
29.  
     
30.  
    //ssh -R 192.168.0.102:5555:192.168.0.101:3306 yunshouhu@192.168.0.102
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    //session.setPortForwardingR("192.168.0.102",5555, "192.168.0.101", 3306);
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    // System.out.println("localhost: -> ");
33.  
    } catch (Exception e) {
34.  
    e.printStackTrace();
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    }
36.  
    }
37.  
     
38.  
     
39.  
     
40.  
    public static void main(String[] args) {
41.  
     
42.  
     
43.  
    try {
44.  
    //1、加载驱动
45.  
    Class.forName("com.mysql.jdbc.Driver");
46.  
    } catch (ClassNotFoundException e) {
47.  
    e.printStackTrace();
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    }
49.  
    //2、创建连接
50.  
    Connection conn = null;
51.  
    Connection conn2 = null;
52.  
    try {
53.  
     
54.  
    conn2 = DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql", "hadoop", "xxxx");
55.  
    getData(conn2);
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    } catch (SQLException e) {
57.  
    System.out.println("未连接上数据库");
58.  
    e.printStackTrace();
59.  
    }
60.  
     
61.  
    try{
62.  
    System.out.println("=============");
63.  
    go();
64.  
    conn = DriverManager.getConnection("jdbc:mysql://192.168.0.101:5555/mysql", "hadoop", "xxx");
65.  
    getData(conn);
66.  
     
67.  
     
68.  
    } catch (SQLException e) {
69.  
    e.printStackTrace();
70.  
    }
71.  
     
72.  
     
73.  
     
74.  
    }
75.  
     
76.  
    private static void getData(Connection conn) throws SQLException {
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78.  
    // 获取所有表名
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    Statement statement = conn.createStatement();
80.  
    ResultSet resultSet = statement
81.  
    .executeQuery("select * from help_keyword");
82.  
    // 获取列名
83.  
    ResultSetMetaData metaData = resultSet.getMetaData();
84.  
    for (int i = 0; i < metaData.getColumnCount(); i++) {
85.  
    // resultSet数据下标从1开始
86.  
    String columnName = metaData.getColumnName(i + 1);
87.  
    int type = metaData.getColumnType(i + 1);
88.  
    if (Types.INTEGER == type) {
89.  
    // int
90.  
    } else if (Types.VARCHAR == type) {
91.  
    // String
92.  
    }
93.  
    System.out.print(columnName + "\t");
94.  
    }
95.  
    System.out.println();
96.  
    // 获取数据
97.  
    while (resultSet.next()) {
98.  
    for (int i = 0; i < metaData.getColumnCount(); i++) {
99.  
    // resultSet数据下标从1开始
100.  
     System.out.print(resultSet.getString(i + 1) + "\t");
101.  
     }
102.  
     System.out.println();
103.  
      
104.  
     }
105.  
     statement.close();
106.  
     conn.close();
107.  
     }
108.  
      
109.  
     }

1.  
   <?xml version="1.0" encoding="UTF-8"?>
2.  
   <project xmlns="http://maven.apache.org/POM/4.0.0"
3.  
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.  
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
5.  
   <parent>
6.  
   <artifactId>grpc-demo</artifactId>
7.  
   <groupId>org.jiepu</groupId>
8.  
   <version>1.0</version>
9.  
   </parent>
10.  
    <modelVersion>4.0.0</modelVersion>
11.  
     
12.  
    <artifactId>echo_socket</artifactId>
13.  
     
14.  
    <properties>
15.  
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
16.  
    <java.version>1.6</java.version>
17.  
    </properties>
18.  
     
19.  
    <dependencies>
20.  
     
21.  
    <dependency>
22.  
    <groupId>com.jcraft</groupId>
23.  
    <artifactId>jsch</artifactId>
24.  
    <version>0.1.53</version>
25.  
    </dependency>
26.  
    <dependency>
27.  
    <groupId>mysql</groupId>
28.  
    <artifactId>mysql-connector-java</artifactId>
29.  
    <version>5.1.36</version>
30.  
    </dependency>
31.  
    </dependencies>
32.  
    <build>
33.  
    <plugins>
34.  
    <plugin>
35.  
    <groupId>org.apache.maven.plugins</groupId>
36.  
    <artifactId>maven-compiler-plugin</artifactId>
37.  
    <configuration>
38.  
    <source>${java.version}</source>
39.  
    <target>${java.version}</target>
40.  
    </configuration>
41.  
    </plugin>
42.  
     
43.  
    <plugin>
44.  
    <groupId>org.apache.maven.plugins</groupId>
45.  
    <artifactId>maven-shade-plugin</artifactId>
46.  
    <executions>
47.  
    <execution>
48.  
    <phase>package</phase>
49.  
    <goals>
50.  
    <goal>shade</goal>
51.  
    </goals>
52.  
    <configuration>
53.  
    <transformers>
54.  
    <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
55.  
    <mainClass>com.yws.echo_socket.ChangeDB</mainClass>
56.  
    </transformer>
57.  
    </transformers>
58.  
    </configuration>
59.  
    </execution>
60.  
    </executions>
61.  
    </plugin>
62.  
    </plugins>
63.  
    </build>
64.  
    </project>