sql嵌入java代码 c语言嵌入sql

怎么让Java写的程序和SQL2008数据库连接起来

首先你要导入sqlserver的jdbc驱动jar包

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java代码如下

String JDriver ="com.microsoft.sqlserver.jdbc.SQLServerDriver"; // SQL数据库引擎

String connectDB ="jdbc:sqlserver://192.168.0.117:1433;DatabaseName=租房查询系统"; // 数据源

try {

Class.forName(JDriver);// 加载数据库引擎，返回给定字符串名的类

} catch (ClassNotFoundException e) {

// e.printStackTrace();

System.out.println("加载数据库引擎失败");

System.exit(0);

}

如何将 JAVa中的 String类变量嵌入SQL查询语句中...?

PreparedStatement pstm = conn.PreparedStatement("select * from t where t.name=?");

pstm.setString(1, "myName");

rs = pstm.executeQuery();

java程序连接sql server2008数据库:求给一个具体的代码，和过程。

连接数据库

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.sql.Statement;

public class TestDB {

public static void main(String[] args) {

try {

// 1.注册驱动

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

System.out.println("注册驱动成功");

String url = ""jdbc:microsoft.sqlserver://127.0.0.1:1433;DatabaseName="; //数据库IP,端口,数据库名

String username = "";

String password = "";

// 加载驱动并获取数据库连接对象

Connection connection = DriverManager.getConnection(url, username,

password);

System.out.println("连接数据库成功！");

// 创建Statement对象

Statement stmt = connection.createStatement();

// SQL语句

String sql = "insert into student(id,name,age,email,address) values(1,'tom',23,'dfg@163.com','England') ";

int rows = stmt.executeUpdate(sql);

if (rows 0) {

System.out.println("插入成功!");

}

// 释放资源

stmt.close();

connection.close();

} catch (SQLException e) {

e.printStackTrace();

}

catch (ClassNotFoundException e) {

e.printStackTrace();

}

}

}

预编译的数据库处理

public class ConnectionManager{

public static final String DRIVER_CLASS ="";

public static final String URL = "";

public static final String USERNAME = "";

public static final String PASSWORD = "";

//获取连接对象

public static Connection getConnection(){

Connection conn = null;

Class.forName(DRIVER_CLASS);

conn = DriverManager.getConnection(URL,USERNAME,PASSWORD);

return conn;

}

public static void closeAll(ResultSet rs,Statement stmt,Connection conn){

try{

if(rs!=null){

rs.close();

rs = null;

}

if(stmt!=null){

stmt.close();

stmt = null;

}

if(conn!=null){

conn.close();

conn=null;

}

}

}

}

public class DBOperator{

public int executeUpdate(String sql,Object[] params){

int rows = 0;

Connection connn = ConnectionManager.getConnection();

PreparedStatement pstmt = conn.prepareStatement(sql);

if(params!=null){

for(int i=0;iparams.length;i++){

pstmt.setObject(i+1,params[i]);//下标从1开始

}

}

rows = pstmt.executeUpdate();

ConnectionManager.closeAll(null,pstmt,conn);

return rows;

}

public ResultSet executeQuery(String sql,Object[] params){

Connetion conn = ConnectionManager.getConnection();

if(params!=null){

for(int i= 0;iparams.length;i++){

pstmt.setObject(i+1,params(i));

}

}

rs=pstmt.executeQuery();

ConnectionManager.closeAll(rs,pstmt,conn);

return rs;

}

}

/**

*statement连接数据库

*/

public class TestOperatorGrade{

private static void updateGrade(int id,String name,String description){

Class.forName();//注册驱动

Connection conn = DirverManager.getConnection("","","");

Statement stmt = conn.createStament();

String sql = "UPDATE grades set name = '"+name+"',description='"+description+"'WHere id="+id;

int rows = stmt.executeUpdate(sql);

}

}

这是java 程序的代码