GET请求
示例一:
- 服务端代码
java
@GetMapping("/f11")
public String f11(Integer pageNum, Integer pageSize) {
return pageNum + " : " + pageSize;
}
- 前端代码
java
<template>
<div class="home">
<button @click="getFun1">发送get请求</button>
</div>
</template>
<script>
import axios from 'axios'
export default {
name: 'Home',
methods: {
getFun1 () {
axios.get('http://localhost/blog/f11?pageNum=12&pageSize=8').then(res => {
console.log(res)
})
}
}
}
</script>
示例二:
- 服务端代码
java
@GetMapping("/f12")
public String f12(Integer pageNum, Integer pageSize, HttpServletRequest request) {
String token = request.getHeader("token");
return pageNum + " : " + pageSize + " : " + token;
}
- 前端代码
java
<template>
<div class="home">
<button @click="getFun2">发送get请求</button>
</div>
</template>
<script>
import axios from 'axios'
export default {
name: 'Home',
methods: {
getFun2 () {
axios.get('http://localhost/blog/f12', {
params: {
pageNum: 12,
pageSize: 8
},
headers: {
token: 'asdf123456'
}
}).then(res => {
console.log(res)
})
}
}
}
</script>
GET方式采用接口方式携带参数,比如上面示例最终请求服务器端的url是:
POST请求
示例一:
- 服务端代码
java
@PostMapping("/f21")
public String f21(@RequestBody String param) {
return param;
}
- 前端代码
java
<template>
<div class="home">
<button @click="postFun1">发送post请求</button>
</div>
</template>
<script>
import axios from 'axios'
export default {
name: 'Home',
data () {
return {
queryInfo1: {
query: {
username: 'zhangsan',
password: '1234'
}
}
}
},
methods: {
postFun1 () {
let _this = this
axios.post('http://localhost/blog/f21', _this.queryInfo1).then(res => {
console.log(res)
})
},
}
}
</script>
结果:
示例二:
- 服务端代码
java
@PostMapping("/f21")
public String f21(@RequestBody String param) {
return param;
}
- 前端代码
java
<template>
<div class="home">
<button @click="postFun2">发送post请求</button>
</div>
</template>
<script>
import axios from 'axios'
export default {
name: 'Home',
data () {
return {
queryInfo2: {
username: 'zhangsan',
password: '1234'
}
}
},
methods: {
postFun2 () {
let _this = this
axios.post('http://localhost/blog/f21', {
data: _this.queryInfo2
}).then(res => {
console.log(res)
})
}
}
}
</script>
结果:
示例三:
- 服务端代码
java
@PostMapping("/f23")
public String f23(Integer aa, Integer bb,@RequestBody String query) {
return aa + ": " + bb + ": " + query;
}
- 前端代码
java
<template>
<div class="home">
<button @click="postFun3">发送post请求</button>
</div>
</template>
<script>
import axios from 'axios'
export default {
name: 'Home',
data () {
return {
queryInfo2: {
username: 'zhangsan',
password: '1234'
}
}
},
methods: {
postFun3 () {
let _this = this
axios.post('http://localhost/blog/f23', _this.queryInfo2, {
params: { //params表示url中传递的参数,它会拼接在url后面
aa: 11,
bb: 22
}
}).then(res => {
console.log(res)
})
}
}
}
</script>
请求的url为:http://localhost/blog/f23?aa=11\&bb=22 ,结果:
注意上面三个示例中传递到后台的username和password参数采用下面方式后台是无法获取到的:
java
@PostMapping("/f22")
public String f22(String username, String password) {
return username + " : " + password;
}
原因是axios.post默认情况下传递到后台的数据是JSON格式的,通过设置POST请求头,可以告诉服务器请求主体的数据格式为kv的形式,比如:a=aaaa&b=bbbb。
示例:设置POST请求的格式
- 后台代码
java
@PostMapping("/f21")
public String f21(@RequestBody String param) {
return param;
}
- 前端代码
java
<template>
<div class="home">
<button @click="postFun1">发送post请求</button>
<button @click="postFun2">发送post请求</button>
</div>
</template>
<script>
import axios from 'axios'
axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded'
import qs from 'qs'
export default {
name: 'Home',
methods: {
postFun1 () {
let params = new URLSearchParams()
params.append('username', 'zhangsan')
params.append('password', '1234')
axios.post('http://localhost/blog/f22', params).then(res => {
console.log(res)
})
},
postFun2 () {
let params = qs.stringify({
'username': 'zhangsan',
'password': 1234
})
axios.post('http://localhost/blog/f22', params).then(res => {
console.log(res)
})
},
}
}
</script>
前端会将参数以kv字符串的形式发送到后台:username=zhangsan&password=1234。上面示例前端网页中请求的也可以用下面控制器接收:
java
@PostMapping("/f22")
public String f22(String username, String password) {
return username + " : " + password;
}
Put
示例一:
- 前端
java
let _this = this
_this.$axios.put(`/user/${user.id}/status`).then(res => { //注意,此处使用的是反斜杠
console.log(res)
})
- 后端
java
@PutMapping("/user/{userId}/status")
public Result changStatus(@PathVariable("userId") Integer userId){
}
示例二:
- 前端
java
const param = {
userId:1
}
_this.$axios.put('/user/update',param).then(res=>{
console.log(res)
})
- 后端
java
@PutMapping("/user/update")
public Result changStatus(@PathVariable("userId") Integer userId){
}
patch
前端
java
const param={
ids:[1,3,5,8]
}
_this.$axios.patch('/user/p',param).then(res=>{
console.log(res)
}),
Delete
前端
java
_this.$axios.delete('/user/delete',{
params:{
id:1
}
}).then(res=>{
console.log(res)
})