本篇文章给大家分享的是有关怎么在angularjs中使用http与后台进行交互，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。
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HttpModule引入
找到app.module.ts文件
import { NgModule, ErrorHandler } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';
import { LoginPage } from "../pages/login/login";
/**
引入HttpClientModule模块
*/
import { HttpClientModule } from "@angular/common/http";
import { RequestServiceProvider } from "../providers/request-service/request-service";
import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';
@NgModule({
declarations: [
MyApp,
LoginPage,
],
imports: [
BrowserModule,
/**
导入模块
*/
HttpClientModule,
IonicModule.forRoot(MyApp,{
tabsHideOnSubPages:'true',
backButtonText:''
})
],
bootstrap: [IonicApp],
entryComponents: [
MyApp,
LoginPage,
],
providers: [
StatusBar,
SplashScreen,
{provide: ErrorHandler, useClass: IonicErrorHandler},
RequestServiceProvider,
]
})
export class AppModule {}按照自己的项目导入HttpClientModule模块即可，我导入其他组件，不用考虑。
3.创建服务
ionic g provider RequestService
执行完成后则会出现如下文件
4.封装服务
/**
导入http相关
*/
import { HttpClient,HttpHeaders } from '@angular/common/http';
import { Injectable } from '@angular/core';
import {Observable} from "rxjs";
/*
Generated class for the RequestServiceProvider provider.
See https://angular.io/guide/dependency-injection for more info on providers
and Angular DI.
*/
@Injectable()
export class RequestServiceProvider {
/**
讲基础路径提取说出来，配置ip和端口时只需要在这修改
*/
//basePath:string='http://10.4.0.205:8081'
reserveBasePath:string='http://10.6.254.110:8081'
basePath=this.reserveBasePath;
/**
封装固定的消息头相关
*/
private headers = new HttpHeaders({'Content-Type': 'application/json'})
// private headers = new HttpHeaders({'Access-Control-Allow-Origin':'*'});
/**
初始化http变量
*/
constructor(public http: HttpClient) {
console.log('Hello RequestServiceProvider Provider');
}
/**
给外界提供了四个基础的方法只需要传入uri和data即可
*/
get(req:any):Observable {
return this.http.get(this.basePath+req.uri,{headers:this.headers});
}
post(req:any):Observable{
return this.http.post(this.basePath+req.uri,req.data,{headers:this.headers});
}
put(req:any):Observable{
return this.http.put(this.basePath+req.uri,req.data,{headers:this.headers});
}
delete(req:any):Observable{
return this.http.delete(this.basePath+req.uri,{headers:this.headers});
}
} 5.导入声明封装服务
找到app.module.ts文件和第一部类似
import { NgModule, ErrorHandler } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';
import { LoginPage } from "../pages/login/login";
/**
引入HttpClientModule模块
*/
import { HttpClientModule } from "@angular/common/http";
/**
导入自定的服务
*/
import { RequestServiceProvider } from "../providers/request-service/request-service";
import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';
@NgModule({
declarations: [
MyApp,
LoginPage,
],
imports: [
BrowserModule,
/**
导入模块
*/
HttpClientModule,
IonicModule.forRoot(MyApp,{
tabsHideOnSubPages:'true',
backButtonText:''
})
],
bootstrap: [IonicApp],
entryComponents: [
MyApp,
LoginPage,
],
providers: [
StatusBar,
SplashScreen,
{provide: ErrorHandler, useClass: IonicErrorHandler},
/**
声明服务
*/
RequestServiceProvider,
]
})
export class AppModule {}6.使用服务
找到自己的页面所对应的ts文件如下面代码一样
import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
/**
导入声明
*/
import {RequestServiceProvider} from "../../providers/request-service/request-service";
/**
* Generated class for the LoginPage page.
*
* See https://ionicframework.com/docs/components/#navigation for more info on
* Ionic pages and navigation.
*/
@IonicPage()
@Component({
selector: 'page-login',
templateUrl: 'login.html',
})
export class LoginPage {
title:string = '登录'
promptMessage:string = ''
user={
username:'',
password:''
}
req={
login:{
uri:'/user/login'
}
}
constructor(public navCtrl: NavController, public navParams: NavParams,
/**
初始化服务对象
*/
private requestService:RequestServiceProvider) {
}
ionViewDidLoad() {
console.log('ionViewDidLoad LoginPage');
}
login(){
/**
调用post方法，subscribe()方法可以出发请求，调用一次发送一次，调用多次发多次
*/
this.requestService.post({uri:this.req.login.uri,data:user}).subscribe((res:any)=>{
console.log(res);
if (res.code == 0){
this.promptMessage = res.message;
} else {
this.promptMessage = res.message;
}
},
error1 => {
alert(JSON.stringify(error1))
});
}
}以上就是怎么在angularjs中使用http与后台进行交互，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注创新互联行业资讯频道。