废话不多话,直接上代码了;这个demo我也是网上找的 稍微的修改了下;代码里面都有注释;
package com.example.democrud.democurd;
import java.sql.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class sqlserver {
public static void main(String[] args) {
test1();
// test2();
}
public static void test1(){
//默认sql server 驱动类
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
//此处localhost 为本地的地址 1433 默认端口 demo 为主表 的名字
String dbURL = "jdbc:sqlserver://localhost:1433;databaseName=demo";
String userName = "sa"; //sqlserver用户名
String userPwd = "root"; //sqlserver用户密码
try {
Class.forName(driverName); //加载sqlserver的驱动类
System.out.println("sqlServer load success!");
} catch (ClassNotFoundException a) {
System.out.println("sqlServer load failed!");
a.printStackTrace();
}
Connection dbcon = null;
try {
//处理与数据库的连接
dbcon = DriverManager.getConnection(dbURL, userName, userPwd);
Statement stmt = dbcon.createStatement();
String sql = "select * from Demo";
//ResultSet对象,其包含给定查询生成的数据
ResultSet resultSet = stmt.executeQuery(sql);
//获取执行的SQL语句的元数据
ResultSetMetaData metaData = resultSet.getMetaData();
//获取执行的SQL语句查询的列的个数
int columnCount = metaData.getColumnCount();
//获取表中的所有数据,字段 + 值
List<Map<String, Object>> list1 = new ArrayList<>();
List<Map<String, Object>> list2 = new ArrayList<>();
List<Object> list3 = new ArrayList<>();
//取出ResultSet中表的记录。如果可以取出则返回true,否则返回false
while (resultSet.next()) {
//数据
Map<String, Object> row = new HashMap<>();
//表结构--包含字段类型
Map<String, Object> map = new HashMap<>();
for (int i = 0; i < columnCount; i++) {
//字段
String columnLabel = metaData.getColumnLabel(i + 1);
//字段类型
String columnTypeName = metaData.getColumnTypeName(i + 1);
//值
Object value = resultSet.getObject(i + 1);
row.put(columnLabel, value);
map.put(columnLabel, columnTypeName);
list3.add(value);
}
list1.add(row);
list2.add(map);
System.out.println("获取到的key的值"+list2);
System.out.println("获取到的value的值"+list1);
System.out.println("单独获取V的值"+list3);
}
System.out.println("sqlServer connect success! sql server 连接成功");
dbcon.close();
} catch (SQLException e) {
System.out.println("sqlServer connect failed!");
e.printStackTrace();
}
}
public static void test2(){
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
String dbURL = "jdbc:sqlserver://120.27.229.213:65023;databaseName=davinci3";
String userName = "sa"; //sqlserver用户名
String userPwd = "BSa!67365021"; //sqlserver用户密码
try {
Class.forName(driverName); //加载sqlserver的驱动类
System.out.println("sqlServer load success!");
} catch (ClassNotFoundException a) {
System.out.println("sqlServer load failed!");
a.printStackTrace();
}
Connection dbcon = null;
try {
//处理与数据库的连接
dbcon = DriverManager.getConnection(dbURL, userName, userPwd);
Statement stmt = dbcon.createStatement();
String sql = "select * from display";
//ResultSet对象,其包含给定查询生成的数据
ResultSet resultSet = stmt.executeQuery(sql);
//获取执行的SQL语句的元数据
ResultSetMetaData metaData = resultSet.getMetaData();
//获取执行的SQL语句查询的列的个数
int columnCount = metaData.getColumnCount();
//获取表中的所有数据,字段 + 值
List<Map<String, Object>> list1 = new ArrayList<>();
List<Map<String, Object>> list2 = new ArrayList<>();
//取出ResultSet中表的记录。如果可以取出则返回true,否则返回false
while (resultSet.next()) {
//数据
Map<String, Object> row = new HashMap<>();
//表结构--包含字段类型
Map<String, Object> map = new HashMap<>();
for (int i = 0; i < columnCount; i++) {
//字段
String columnLabel = metaData.getColumnLabel(i + 1);
//字段类型
String columnTypeName = metaData.getColumnTypeName(i + 1);
//值
Object value = resultSet.getObject(i + 1);
row.put(columnLabel, value);
map.put(columnLabel, columnTypeName);
}
list1.add(row);
list2.add(map);
System.out.println(list1);
System.out.println(list2);
}
System.out.println("sqlServer connect success!");
dbcon.close();
} catch (SQLException e) {
System.out.println("sqlServer connect failed!");
e.printStackTrace();
}
}
}
有疑问可留言;大家一起交流;