一、准备
1、引入pom依赖
在要使用HttpClient的项目中加入依赖
<!--httpclient-->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
2、添加httpclient工具类
把HttpClientUtils.java放入项目的util包
/**
* http请求客户端
*/
public class HttpClientUtils {
private String url;
private Map<String, String> param;
private int statusCode;
private String content;
private String xmlParam;
private boolean isHttps;
public boolean isHttps() {
return isHttps;
}
public void setHttps(boolean isHttps) {
this.isHttps = isHttps;
}
public String getXmlParam() {
return xmlParam;
}
public void setXmlParam(String xmlParam) {
this.xmlParam = xmlParam;
}
public HttpClientUtils(String url, Map<String, String> param) {
this.url = url;
this.param = param;
}
public HttpClientUtils(String url) {
this.url = url;
}
public void setParameter(Map<String, String> map) {
param = map;
}
public void addParameter(String key, String value) {
if (param == null)
param = new HashMap<String, String>();
param.put(key, value);
}
public void post() throws ClientProtocolException, IOException {
HttpPost http = new HttpPost(url);
setEntity(http);
execute(http);
}
public void put() throws ClientProtocolException, IOException {
HttpPut http = new HttpPut(url);
setEntity(http);
execute(http);
}
public void get() throws ClientProtocolException, IOException {
if (param != null) {
StringBuilder url = new StringBuilder(this.url);
boolean isFirst = true;
for (String key : param.keySet()) {
if (isFirst) {
url.append("?");
isFirst = false;
}else {
url.append("&");
}
url.append(key).append("=").append(param.get(key));
}
this.url = url.toString();
}
HttpGet http = new HttpGet(url);
execute(http);
}
/**
* set http post,put param
*/
private void setEntity(HttpEntityEnclosingRequestBase http) {
if (param != null) {
List<NameValuePair> nvps = new LinkedList<NameValuePair>();
for (String key : param.keySet())
nvps.add(new BasicNameValuePair(key, param.get(key))); // 参数
http.setEntity(new UrlEncodedFormEntity(nvps, Consts.UTF_8)); // 设置参数
}
if (xmlParam != null) {
http.setEntity(new StringEntity(xmlParam, Consts.UTF_8));
}
}
private void execute(HttpUriRequest http) throws ClientProtocolException,
IOException {
CloseableHttpClient httpClient = null;
try {
if (isHttps) {
SSLContext sslContext = new SSLContextBuilder()
.loadTrustMaterial(null, new TrustStrategy() {
// 信任所有
public boolean isTrusted(X509Certificate[] chain,
String authType)
throws CertificateException {
return true;
}
}).build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
sslContext);
httpClient = HttpClients.custom().setSSLSocketFactory(sslsf)
.build();
} else {
httpClient = HttpClients.createDefault();
}
CloseableHttpResponse response = httpClient.execute(http);
try {
if (response != null) {
if (response.getStatusLine() != null)
statusCode = response.getStatusLine().getStatusCode();
HttpEntity entity = response.getEntity();
// 响应内容
content = EntityUtils.toString(entity, Consts.UTF_8);
}
} finally {
response.close();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
httpClient.close();
}
}
public int getStatusCode() {
return statusCode;
}
public String getContent() throws ParseException, IOException {
return content;
}
}
二、获取access_token
在ApWxiController.java中添加如下方法
@GetMapping("callback")
public String callback(String code, String state, HttpSession session){
System.out.println("callback被调用");
System.out.println("code:" + code);
System.out.println("state:" + state);
if(StringUtils.isEmpty(code) || StringUtils.isEmpty(state)){
log.error("非法回调请求");
throw new GuliException(ResultCodeEnum.ILLEGAL_CALLBACK_REQUEST_ERROR);
}
String sessionState = (String)session.getAttribute("wx_open_state");
if(!state.equals(sessionState)){
log.error("非法回调请求");
throw new GuliException(ResultCodeEnum.ILLEGAL_CALLBACK_REQUEST_ERROR);
}
//携带code临时票据,和appid以及appsecret请求access_token和openid(微信唯一标识)
String accessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token";
//组装参数:?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code
Map<String, String> accessTokenParam = new HashMap<>();
accessTokenParam.put("appid", ucenterProperties.getAppId());
accessTokenParam.put("secret", ucenterProperties.getAppSecret());
accessTokenParam.put("code", code);
accessTokenParam.put("grant_type", "authorization_code");
HttpClientUtils client = new HttpClientUtils(accessTokenUrl, accessTokenParam);
String result = "";
try {
//发送请求:组装完整的url字符串、发送请求
client.get();
//得到响应
result = client.getContent();
System.out.println("result = " + result);
} catch (Exception e) {
log.error("获取access_token失败");
throw new GuliException(ResultCodeEnum.FETCH_ACCESSTOKEN_FAILD);
}
Gson gson = new Gson();
HashMap<String, Object> resultMap = gson.fromJson(result, HashMap.class);
//失败的响应结果
Object errcodeObj = resultMap.get("errcode");
if(errcodeObj != null){
Double errcode = (Double)errcodeObj;
String errmsg = (String)resultMap.get("errmsg");
log.error("获取access_token失败:" + "code:" + errcode + ", message:" + errmsg);
throw new GuliException(ResultCodeEnum.FETCH_ACCESSTOKEN_FAILD);
}
//解析出结果中的access_token和openid
String accessToken = (String)resultMap.get("access_token");
String openid = (String)resultMap.get("openid");
System.out.println("accessToken:" + accessToken);
System.out.println("openid:" + openid);
//在本地数据库中查找当前微信用户的信息
Member member = memberService.getByOpenid(openid);
//TODO
return null;
}
三、获取用户信息
1、根据openid查询用户是否已注册
业务接口:MemberService.java
/**
* 根据openid返回用户信息
* @param openid
* @return
*/
Member getByOpenid(String openid);
业务实现:MemberServiceImpl.java
@Override
public Member getByOpenid(String openid) {
QueryWrapper<Member> queryWrapper = new QueryWrapper<>();
queryWrapper.eq("openid", openid);
return baseMapper.selectOne(queryWrapper);
}
2、根据access_token获取用户信息
@Autowired
private MemberService memberService;
@GetMapping("callback")
public String callback(String code, String state, HttpSession session){
...
//根据access_token获取微信用户的基本信息
//根据openid查询当前用户是否已经使用微信登录过该系统
Member member = memberService.getByOpenid(openid);
if(member == null){
//向微信的资源服务器发起请求,获取当前用户的用户信息
String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo";
Map<String, String> baseUserInfoParam = new HashMap();
baseUserInfoParam.put("access_token", accessToken);
baseUserInfoParam.put("openid", openid);
client = new HttpClientUtils(baseUserInfoUrl, baseUserInfoParam);
String resultUserInfo = null;
try {
client.get();
resultUserInfo = client.getContent();
} catch (Exception e) {
log.error(ExceptionUtils.getMessage(e));
throw new GuliException(ResultCodeEnum.FETCH_USERINFO_ERROR);
}
HashMap<String, Object> resultUserInfoMap = gson.fromJson(resultUserInfo, HashMap.class);
if(resultUserInfoMap.get("errcode") != null){
log.error("获取用户信息失败" + ",message:" + resultMap.get("errmsg"));
throw new GuliException(ResultCodeEnum.FETCH_USERINFO_ERROR);
}
String nickname = (String)resultUserInfoMap.get("nickname");
String headimgurl = (String)resultUserInfoMap.get("headimgurl");
Double sex = (Double)resultUserInfoMap.get("sex");
//用户注册
member = new Member();
member.setOpenid(openid);
member.setNickname(nickname);
member.setAvatar(headimgurl);
member.setSex(sex.intValue());
memberService.save(member);
}
JwtInfo jwtInfo = new JwtInfo();
jwtInfo.setId(member.getId());
jwtInfo.setNickname(member.getNickname());
jwtInfo.setAvatar(member.getAvatar());
String jwtToken = JwtUtils.getJwtToken(jwtInfo, 1800);
//携带token跳转
return "redirect:http://localhost:3000?token=" + jwtToken;
}
四、前端整合
components/AppHeader.vue
mounted() {
// 微信登录url token获取
this.token = this.$route.query.token
if (this.token) {
// 将token存在cookie中
cookie.set('guli_jwt_token', this.token, { domain: 'localhost' })
// 跳转页面:擦除url中的token
// 注意:window对象在created方法中无法被访问,因此要写在mounted中
window.location.href = '/'
}
},