三种方法实现java调用Restful接口
1,基本介绍
Restful接口的调用,前端一般使用ajax调用,后端可以使用的方法比较多,
本次介绍三种:
1.HttpURLConnection实现
2.HttpClient实现
3.Spring的RestTemplate
2,HttpURLConnection实现
@Controller
public class RestfulAction {
@Autowired
private UserService userService;
// 修改
@RequestMapping(value = "put/{param}", method = RequestMethod.PUT)
public @ResponseBody String put(@PathVariable String param) {
return "put:" + param;
}
// 新增
@RequestMapping(value = "post/{param}", method = RequestMethod.POST)
public @ResponseBody String post(@PathVariable String param,String id,String name) {
System.out.println("id:"+id);
System.out.println("name:"+name);
return "post:" + param;
}
// 删除
@RequestMapping(value = "delete/{param}", method = RequestMethod.DELETE)
public @ResponseBody String delete(@PathVariable String param) {
return "delete:" + param;
}
// 查找
@RequestMapping(value = "get/{param}", method = RequestMethod.GET)
public @ResponseBody String get(@PathVariable String param) {
return "get:" + param;
}
// HttpURLConnection 方式调用Restful接口
// 调用接口
@RequestMapping(value = "dealCon/{param}")
public @ResponseBody String dealCon(@PathVariable String param) {
try {
String url = "http://localhost:8080/tao-manager-web/";
url+=(param+"/xxx");
URL restServiceURL = new URL(url);
HttpURLConnection httpConnection = (HttpURLConnection) restServiceURL
.openConnection();
//param 输入小写,转换成 GET POST DELETE PUT
httpConnection.setRequestMethod(param.toUpperCase());
// httpConnection.setRequestProperty("Accept", "application/json");
if("post".equals(param)){
//打开输出开关
httpConnection.setDoOutput(true);
// httpConnection.setDoInput(true);
//传递参数
String input = "&id="+ URLEncoder.encode("abc", "UTF-8");
input+="&name="+ URLEncoder.encode("啊啊啊", "UTF-8");
OutputStream outputStream = httpConnection.getOutputStream();
outputStream.write(input.getBytes());
outputStream.flush();
}
if (httpConnection.getResponseCode() != 200) {
throw new RuntimeException(
"HTTP GET Request Failed with Error code : "
+ httpConnection.getResponseCode());
}
BufferedReader responseBuffer = new BufferedReader(
new InputStreamReader((httpConnection.getInputStream())));
String output;
System.out.println("Output from Server: \n");
while ((output = responseBuffer.readLine()) != null) {
System.out.println(output);
}
httpConnection.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return "success";
}
}
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
3.HttpClient实现
package com.taozhiye.controller;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.taozhiye.entity.User;
import com.taozhiye.service.UserService;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
@Controller
public class RestfulAction {
@Autowired
private UserService userService;
// 修改
@RequestMapping(value = "put/{param}", method = RequestMethod.PUT)
public @ResponseBody String put(@PathVariable String param) {
return "put:" + param;
}
// 新增
@RequestMapping(value = "post/{param}", method = RequestMethod.POST)
public @ResponseBody User post(@PathVariable String param,String id,String name) {
User u = new User();
System.out.println(id);
System.out.println(name);
u.setName(id);
u.setPassword(name);
u.setEmail(id);
u.setUsername(name);
return u;
}
// 删除
@RequestMapping(value = "delete/{param}", method = RequestMethod.DELETE)
public @ResponseBody String delete(@PathVariable String param) {
return "delete:" + param;
}
// 查找
@RequestMapping(value = "get/{param}", method = RequestMethod.GET)
public @ResponseBody User get(@PathVariable String param) {
User u = new User();
u.setName(param);
u.setPassword(param);
u.setEmail(param);
u.setUsername("爱爱啊");
return u;
}
@RequestMapping(value = "dealCon2/{param}")
public @ResponseBody User dealCon2(@PathVariable String param) {
User user = null;
try {
HttpClient client = HttpClients.createDefault();
if("get".equals(param)){
HttpGet request = new HttpGet("http://localhost:8080/tao-manager-web/get/"
+"啊啊啊");
request.setHeader("Accept", "application/json");
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
ObjectMapper mapper = new ObjectMapper();
user = mapper.readValue(entity.getContent(), User.class);
}else if("post".equals(param)){
HttpPost request2 = new HttpPost("http://localhost:8080/tao-manager-web/post/xxx");
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
nvps.add(new BasicNameValuePair("id", "啊啊啊"));
nvps.add(new BasicNameValuePair("name", "secret"));
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvps, "GBK");
request2.setEntity(formEntity);
HttpResponse response2 = client.execute(request2);
HttpEntity entity = response2.getEntity();
ObjectMapper mapper = new ObjectMapper();
user = mapper.readValue(entity.getContent(), User.class);
}else if("delete".equals(param)){
}else if("put".equals(param)){
}
} catch (Exception e) {
e.printStackTrace();
}
return user;
}
}
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
- 93
- 94
- 95
- 96
- 97
- 98
- 99
- 100
- 101
- 102
- 103
4.Spring的RestTemplate
springmvc.xml增加
<!-- 配置RestTemplate -->
<!--Http client Factory -->
<bean id="httpClientFactory"
class="org.springframework.http.client.SimpleClientHttpRequestFactory">
<property name="connectTimeout" value="10000" />
<property name="readTimeout" value="10000" />
</bean>
<!--RestTemplate -->
<bean id="restTemplate" class="org.springframework.web.client.RestTemplate">
<constructor-arg ref="httpClientFactory" />
</bean>
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
controller
@Controller
public class RestTemplateAction {
@Autowired
private RestTemplate template;
@RequestMapping("RestTem")
public @ResponseBody User RestTem(String method) {
User user = null;
//查找
if ("get".equals(method)) {
user = template.getForObject(
"http://localhost:8080/tao-manager-web/get/{id}",
User.class, "呜呜呜呜");
//getForEntity与getForObject的区别是可以获取返回值和状态、头等信息
ResponseEntity<User> re = template.
getForEntity("http://localhost:8080/tao-manager-web/get/{id}",
User.class, "呜呜呜呜");
System.out.println(re.getStatusCode());
System.out.println(re.getBody().getUsername());
//新增
} else if ("post".equals(method)) {
HttpHeaders headers = new HttpHeaders();
headers.add("X-Auth-Token", UUID.randomUUID().toString());
MultiValueMap<String, String> postParameters = new LinkedMultiValueMap<String, String>();
postParameters.add("id", "啊啊啊");
postParameters.add("name", "部版本");
HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(
postParameters, headers);
user = template.postForObject(
"http://localhost:8080/tao-manager-web/post/aaa", requestEntity,
User.class);
//删除
} else if ("delete".equals(method)) {
template.delete("http://localhost:8080/tao-manager-web/delete/{id}","aaa");
//修改
} else if ("put".equals(method)) {
template.put("http://localhost:8080/tao-manager-web/put/{id}",null,"bbb");
}
return user;
}
}
三种方法实现java调用Restful接口的更多相关文章
- Java调用RestFul接口
使用Java调用RestFul接口,以POST请求为例,以下提供几种方法: 一.通过HttpURLConnection调用 1 public String postRequest(String url ...
- JAVA写JSON的三种方法,java对象转json数据
JAVA写JSON的三种方法,java对象转json数据 转自:http://www.xdx97.com/#/single?bid=5afe2ff9-8cd1-67cf-e7bc-437b74c07a ...
- 数组k平移三种方法(java)
上代码,本文用了三种方法实现,时间复杂度不一样,空间复杂度都是o(1): public class ArrayKMove { /** * 问题:数组的向左k平移,k小于数组长度 * @param ar ...
- java调用restful接口的方法
Restful接口的调用,前端一般使用ajax调用,后端可以使用的方法如下: 1.HttpURLConnection实现 2.HttpClient实现 3.Spring的RestTemplate
- Java方法通过RestTemplate调用restful接口
背景:项目A需要在代码内部调用项目B的一个restful接口,该接口是POST方式,header中 Authorization为自定义内容,主要传输的内容封装在body中,所以使用到了RestTemp ...
- Top k问题的讨论(三种方法的java实现及适用范围)
在很多的笔试和面试中,喜欢考察Top K.下面从自身的经验给出三种实现方式及实用范围. 合并法 这种方法适用于几个数组有序的情况,来求Top k.时间复杂度为O(k*m).(m:为数组的个数).具体实 ...
- Java 调用Restful API接口的几种方式--HTTPS
摘要:最近有一个需求,为客户提供一些Restful API 接口,QA使用postman进行测试,但是postman的测试接口与java调用的相似但并不相同,于是想自己写一个程序去测试Restful ...
- Java实现ping功能的三种方法及Linux的区分
前大半部份转自:https://blog.csdn.net/futudeniaodan/article/details/52317650 检测设备的运行状态,有的是使用ping的方式来检测的.所以需要 ...
- 三种方法实现调用Restful接口
1.基本介绍 Restful接口的调用,前端一般使用ajax调用,后端可以使用的方法比较多, 本次介绍三种: 1.HttpURLConnection实现 2.HttpClient实现 3.Spring ...
随机推荐
- 【教程向】——基于hexo+github搭建私人博客
前言 1.github pages服务生成的全是静态文件,访问速度快: 2.免费方便,不用花一分钱就可以搭建一个自由的个人博客,不需要服务器不需要后台: 3.可以随意绑定自己的域名,不仔细看的话根本看 ...
- sqlplus sys as sysdba
Enter user-name:sys Enter password:password as sysdba --以sys用户登陆的话 必须要加上 as sysdba 子句
- UVa 10129 Play on Words(并查集+欧拉路径)
题目链接: https://cn.vjudge.net/problem/UVA-10129 Some of the secret doors contain a very interesting wo ...
- 动态绑定数据至Html Table
学习或是开发asp.net程序,如果你很不喜欢使用GridView,DataList或是Repeater控件去显示来自数据库的数据,你完全可以使用html的table来完成.今天Insus.NET还让 ...
- ASP.NET MVC5中的数据注解(转载)
ASP.NET MVC5中Model层开发,使用的数据注解有三个作用: 数据映射(把Model层的类用EntityFramework映射成对应的表) 数据验证(在服务器端和客户端验证数据的有效性) 数 ...
- 过滤器模式(Filter Pattern)
过滤器模式 一.什么是过滤器模式 过滤器模式(Filter Pattern),这种模式允许开发人员使用不同的标准来过滤一组对象,通过逻辑运算以解耦的方式把它们连接起来.这种类型的设计模式属于结构型 ...
- 虚拟机中安装完 CentOS7minimal 版本后无法联网的问题
问题描述 安装完系统后无法上网,然后进入到目录 /etc/sysconfig/network-script 查看.发现只有一个 ifcfg-lo. 解决办法 这种情况是没有识别到网卡. 在 VMwar ...
- MySQL5.7 常用用户操作
目录 MySQL5.7 常用用户操作 1. 新建用户 2. 授权 3. 创建用户时授权 4. 设置与更改用户密码(root) 5. 撤销用户权限 6. 删除用户 7. 查看用户的授权 8. 显示当前用 ...
- C#中Main函数为什么要static
假设没有static关键字,那意味着需要用生成一个实例后才可以调用这个Main方法,而Main方法是程序入口点,你没有进入Main方法,自然无法生成一个实例,既然没有实例,那就无法调用Main函数,岂 ...
- BZOJ3108 [cqoi2013]图的逆变换
Description 定义一个图的变换:对于一个有向图\(G=(V, E)\),建立一个新的有向图: \(V'=\{v_e|e \in E\}\),\(E'=\{(v_b, v_e)|b=(u,v) ...