Golang连接Oracle数据库两种方式

Golang连接Oracle 需要安装Oracle Full Client或Instant Client 驱动程序

Linux安装Golang Oracle数据库驱动程序

MacBook安装Golang Oracle数据库驱动程序

方式一

使用go get github.com/mattn/go-oci8

在GoPath的src目录下创建oracleoci8.go,内容如下:

package main

import (
    "database/sql"
    "fmt"
    _ "github.com/mattn/go-oci8"
    "log"
    "os"
)

func main() {
    if len(os.Args) != 2 {
        log.Fatalln(os.Args[0] + " user/password@host:port/sid")
    }
    fmt.Println(os.Args[1])

    db, err := sql.Open("oci8", os.Args[1])

    if err != nil {
        log.Fatalln(err)
    }
    defer db.Close()
    //查询用户
    rows, err := db.Query("select user from dual")
    if err != nil {
        log.Fatalln(err)
    }
    defer rows.Close()
    for rows.Next() {
        var data string
        rows.Scan(&data)
        fmt.Println(data)
    }
    if err = rows.Err(); err != nil {
        log.Fatalln(err)
    }
    //查询ZHUJI表的code字段
    rows2, err := db.Query("SELECT code FROM ZHUJI")
    if err != nil {
        log.Fatalln(err)
    }
    defer rows2.Close()
    for rows2.Next() {
        var data string
        rows2.Scan(&data)
        fmt.Println(data)
    }
    if err = rows2.Err(); err != nil {
        log.Fatalln(err)
    }
}

运行

#直接运行
go run oracleoci8.go liang/[email protected]:1521/orcl
#或者先编译成二进制,在运行二进制文件
go build oracleoci8.go
./oracleoci8 liang/[email protected]:1521/orcl

方式二

使用go get github.com/godror/godror

在GoPath的src目录下创建oracledror.go,内容如下:

package main

import (
    "database/sql"
    "encoding/json"
    "fmt"
    _ "github.com/godror/godror"
)

func main() {
    db, err := sql.Open("godror", `user="liang" password="liang" connectString="192.168.0.4:1521/orcl"`)
    if err != nil {
        panic(err)
    }
    err = db.Ping()
    if err != nil {
        panic(err)
    }
    //查询ZHUJI表中code='pt'的sql:SELECT * FROM ZHUJI where CODE = 'pt'
    sqlStatement := "SELECT * FROM ZHUJI where CODE = :1"
    stmt, err := db.Prepare(sqlStatement)
    defer stmt.Close()
    if err != nil {
        panic(err)
    }
    rows, err := stmt.Query("pt") //输入sql中对应参数的值
    if err != nil {
        panic(err)
    }

    defer rows.Close() //defer关闭查询连接
    //获取列相关信息
    strings, _ := rows.Columns()

    for i := 0; i < len(strings); i++ {
        fmt.Print(" ", strings[i])
    }
    fmt.Print("\n")
    //构造切片存储json
    var slice []map[string]interface{}
    var m1 map[string]interface{}
    m1 = make(map[string]interface{})

    var CODE, OVALUE1, OVALUE2 string
    for rows.Next() {
        rows.Scan(&CODE, &OVALUE1, &OVALUE2) //写入查询数据集的所有列名称
        fmt.Printf("code is %s, OVALUE1 is %s\n", CODE, OVALUE1)
        m1["CODE"] = CODE
        m1["OVALUE1"] = OVALUE1
        m1["OVALUE2"] = OVALUE2
        slice = append(slice, m1) //分片中追加信息
    }
    if err = rows.Err(); err != nil {
        // handle the error here
    }
    defer stmt.Close()

    data, err := json.Marshal(slice)
    if err != nil {
        fmt.Printf("序列化错误 err = %v\n", err)
    }
    //输出序列化后的结果 json字符串
    fmt.Printf("序列化后 = %v\n", string(data))
}

运行

#直接运行
go run oracledror.go
#或者先编译成二进制,在运行二进制文件
go build oracledror.go
./oracledror