三种post 提交数据方式

在Axios中可以通过设置Content-Type来改变数据改变方式, 有时在前端提交数据时会发现后端SpringMVC接收不到数据的情况, 因此可以尝试改变提交方式传递数据.

比如在Postman中, 就可以看到这三种提交方式:
1, form-data
2, x-www-form-urlencoded
3, row - json

这里用https://github.com/PanJiaChen/vue-admin-template/blob/master/src/utils/request.js 该文件封装了axios的方法, 只需要调用service 实例即可

import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000 // request timeout
})
// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent
    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['X-Token'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)
// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */
  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data
    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 20000) {
      Message({
        message: res.message || 'Error',
        type: 'error',
        duration: 5 * 1000
      })
      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.message || 'Error'))
    } else {
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    Message({
      message: error.message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)
export default service

项目的代码来实现这三种方式:

1、Content-Type: application/json

import service from '@/utils/request'
export default {
    test() {
        return service({ // Promise
            url:'http://localhost:8080/dev-api/getMockPersonInfo',
            method: 'post',
            data:{
               "name": "王静飞",
               "pagesize":"20",
               "curpage":"1"
            }
        })
    }
}

Postman 测试: 传递Json

2、Content-Type: multipart/form-data

import service from '@/utils/request'
export default {
    test() {
        var formData = new FormData(); // Currently empty
        formData.append('username', '王静飞');
        return service({ // Promise
            url:'http://localhost:8080/dev-api/getMockPersonInfo',
            method: 'post',
            data: formData
        })
    }
}

3、Content-Type: application/x-www-form-urlencoded

需要安装qs 模块
npm install qs —save

import service from '@/utils/request'
import qs from 'qs'
export default {
    test() {
        var qs_data = qs.stringify({
            "name": "王静飞",
            "pagesize":"20",
            "curpage":"1"
         })
        return service({ // Promise
            url:'http://localhost:8080/dev-api/getMockPersonInfo',
            method: 'post',
            data: qs_data
        })
    }
}

postman 测试: key和value都不需要加双引号

参考连接: https://segmentfault.com/a/1190000015261229