Download Microsoft JDBC Driver 4.0 for SQL Server

Download here: http://www.microsoft.com/zh-cn/download/details.aspx?id=11774

1.

Create a new folder on disk E, named sqljdbc 42, and copy sqljdbc 42.jar into it.

Right click my computer properties advanced system settings environment variable, double-click the CLASSPATH variable (or select CLASSPATH and edit),

Add "; E: \ sqljdbc 42 \ sqljdbc 42. Jar" to the last side (note the first one;)

If there is no CLASSPATH, create a new CLASSPATH variable and set its value to "E: \ sqljdbc 42 \ sqljdbc 42. Jar"

If Tomcat is used as the server, we need to copy the sqljdbc 42.jar class library file to e: \ Apache Tomcat - * * * (version No.) \ lib directory

In addition, you need to copy the sqljdbc 42.jar class library file to the C:\Program Files\Java\jre8\lib\ext directory

Then create a new java project in ecilipse, right-click "BuildPath" in src directory, - > "configure build path" - > "libraries" - > "add external jars"

Add sqljdbc 42.jar file of sqljdbc 42 in E disk

Then create a new class to run

2. Test connection operation

package Test;

import java.sql.*;

public class Test {

public static void main(String[] args) {
    update();
     
}


public static void update() {
    Connection connection=null;
    String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";//SQL database engine
    String dbURL="jdbc:sqlserver://localhost:1433;DatabaseName=tjl";//Data source!!! Note that if loading or connecting to the database fails, it is usually a problem here
    String Name="sa";
    String Pwd="19990713";
  try{
  Class.forName(driverName);
  connection=DriverManager.getConnection(dbURL,Name,Pwd);
  System.out.println("Successfully connected to database");
  }catch(Exception e){
   e.printStackTrace();
     System.out.println("connection failed");
     }
    Statement stmt = null;
    try {
        stmt = connection.createStatement();
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    //Add, delete and modify
    String sql_1="insert into student values('990403','Page','male','12','1','2101')";
    int count_1 = 0;
    try {
        count_1 = stmt.executeUpdate(sql_1);
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }//The return value indicates adding, deleting and modifying several pieces of data
    //Processing result
    if(count_1>0){
        System.out.println("Update success!");
    }
    //Query operation
    String sql_2="select * from student";

    //Close
    try {
        stmt.close();
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    try {
        connection.close();
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
}