学习GO第一天，自我感觉可麻利的开干了-GO语言配置、开发、服务器部署

学习GO第一天，自我感觉可麻利的开干了-GO语言配置、开发、服务器部署





第一步下载 go sdk

https://golang.org/dl/

https://storage.googleapis.com/golang/go1.7.4.linux-amd64.tar.gz





解压go到/usr/local 目录下

tar -C /usr/local -xzf go1.7.4.linux-amd64.tar.gz





第二步安装IntelliJ IDEA 2016.2.4(64)









linux环境设置

1.设置环境变量在/etc/profile 中

#go set

export GOROOT=/usr/local/go

export GOOS=linux

export GOARCH=386

export GOBIN=$GOROOT/bin





PATH=$PATH:$GOBIN

export PATH





#alias cdg="cd /opt/go"









2、http服务范例

package main





import (

"fmt"

"net/http"

)





func handler(w http.ResponseWriter, r *http.Request) {

fmt.Fprintf(w, "Hi, This is an example of http service in golang!")

}





func main() {

http.HandleFunc("/", handler)

http.ListenAndServe(":8080", nil)

}









或：

func hello(c web.C, w http.ResponseWriter, r *http.Request){

    name := r.PostFormValue("name")

    fmt.Fprintf(w, "Hello, %s!", name)

}

Should be this:





func hello(c web.C, w http.ResponseWriter, r *http.Request){





    //Call to ParseForm makes form fields available.

    err := r.ParseForm()

    if err != nil {

        // Handle error here via logging and then return            

    }





    name := r.PostFormValue("name")

    fmt.Fprintf(w, "Hello, %s!", name)

}









go开源项目 http://www.open-open.com/lib/view/open1396063913278.html#Caching





安装mysql驱动：

1、cd d:\go\src

2、git clone https://github.com/go-sql-driver/mysql.git





go mysql编程范例

package main





import (

"fmt"

"database/sql"

//"database/sql/driver"

_"mysql"

//_ "MYSQL"

)





type TestMysql struct {

db *sql.DB

}





/* 初始化数据库引擎 */

func Init() (*TestMysql,error){

test := new(TestMysql);

//mysql.MySQLDriver{}

db,err := sql.Open("mysql","root:wendy197626@/test");

//第一个参数 ： 数据库引擎

//第二个参数 : 数据库DSN配置。Go中没有统一DSN,都是数据库引擎自己定义的，因此不同引擎可能配置不同

//本次演示采用http://code.google.com/p/go-mysql-driver

if err!=nil {

fmt.Println("database initialize error : ",err.Error());

return nil,err;

}

test.db = db;

return test,nil;

}





func (test *TestMysql)CreateDB(dbname string){

if test.db==nil {

return;

}

stmt,err := test.db.Prepare("create table test(id bigint NOT NULL AUTO_INCREMENT , name varchar(20), age int, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=utf8; ");

if err!=nil {

fmt.Println(err.Error());

return;

}

defer stmt.Close();

if result,err := stmt.Exec();err==nil {

if id,err := result.LastInsertId();err==nil {

fmt.Println("insert id : ",id);

}

}

}

/* 测试数据库数据添加 */

func (test *TestMysql)Create(){

if test.db==nil {

return;

}

stmt,err := test.db.Prepare("insert into test(name,age)values(?,?)");

if err!=nil {

fmt.Println(err.Error());

return;

}

defer stmt.Close();

if result,err := stmt.Exec("张三",20);err==nil {

if id,err := result.LastInsertId();err==nil {

fmt.Println("insert id : ",id);

}

}

if result,err := stmt.Exec("李四",30);err==nil {

if id,err := result.LastInsertId();err==nil {

fmt.Println("insert id : ",id);

}

}

if result,err := stmt.Exec("王五",25);err==nil {

if id,err := result.LastInsertId();err==nil {

fmt.Println("insert id : ",id);

}

}

}





/* 测试数据库数据更新 */

func (test *TestMysql)Update(){

if test.db==nil {

return;

}

stmt,err := test.db.Prepare("update test set name=?,age=? where age=?");

if err!=nil {

fmt.Println(err.Error());

return;

}

defer stmt.Close();

if result,err := stmt.Exec("周七",40,25);err==nil {

if c,err := result.RowsAffected();err==nil {

fmt.Println("update count : ",c);

}

}

}





/* 测试数据库数据读取 */

func (test *TestMysql)Read(){

if test.db==nil {

return;

}

rows,err := test.db.Query("select id,name,age from test limit 0,5");

if err!=nil {

fmt.Println(err.Error());

return;

}

defer rows.Close();

fmt.Println("");

cols,_ :=  rows.Columns();

for i := range cols {

fmt.Print(cols[i]);

fmt.Print("\t");

}

fmt.Println("");

var id int;

var name string;

var age int;

for rows.Next(){

if err := rows.Scan(&id,&name,&age);err==nil {

fmt.Print(id);

fmt.Print("\t");

fmt.Print(name);

fmt.Print("\t");

fmt.Print(age);

fmt.Print("\t\r\n");

}

}

}





/* 测试数据库删除 */

func (test *TestMysql)Delete(){

if test.db==nil {

return;

}

stmt,err := test.db.Prepare("delete from test where age=?");

if err!=nil {

fmt.Println(err.Error());

return;

}

defer stmt.Close();

if result,err := stmt.Exec(20);err==nil {

if c,err :=  result.RowsAffected();err==nil{

fmt.Println("remove count : ",c);

}

}

}





func (test *TestMysql)Close(){

if test.db!=nil {

test.db.Close();

}

}





func main(){

test,err := Init();

println(test,err)

if err==nil {

println("asds")

test.CreateDB("test") //建表

test.Create();

test.Update();

test.Read();

test.Delete();

test.Read();

test.Close();

}

}