微信小程序学习记录(一) 登陆验证
微信小程序登陆时序图
从图中看出：微信小程序提供了登陆的开发接口，在小程序界面我们换取一个code，将code发送到自己的服务器再去微信接口换取登陆凭证
wx.login({
success: res => {
wx.request({
method: 'post',
url: 'http://localhost:8080/text/onlogin?code=' + res.code,
header: {
'content-type': 'application/json'
},
dataType: 'json',
data: {
}
control层
@RequestMapping(value="/onlogin", method = RequestMethod.POST)
@ResponseBody
public Map<String, Object> wxLogin(String code,HttpServletRequest request)
{
Map<String,Object> map=new HashMap<String,Object>();
String url="https://api.weixin.qq.com/sns/jscode2session";
Map<String,String>param=new HashMap<>();
param.put("appid", "自己的appid");
param.put("secret","自己的secret");
param.put("js_code", code);
param.put("grant_type", "authorization_code");
//返回openID和session_key
String result=HttpClientUtil.doGet(url, param);//一个HttpClientUtil工具类
wxSessionModel wxsessionmodel= JsonUtil.parseObject(result, wxSessionModel.class);//将返回的结果转换为wxsessionmodel
return map;
}
wxSessionModel
public class wxSessionModel {
private String session_key;
private String openid;
public String getSession_key() {
return session_key;
}
public void setSession_key(String session_key) {
this.session_key = session_key;
}
public String getOpenid() {
return openid;
}
public void setOpenID(String openid) {
this.openid = openid;
}
}
HttpClientUtil工具类
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
public class HttpClientUtil {
public static String doGet(String url, Map<String, String> param) {
// 创建Httpclient对象
CloseableHttpClient httpclient = HttpClients.createDefault();
String resultString = "";
CloseableHttpResponse response = null;
try {
// 创建uri
URIBuilder builder = new URIBuilder(url);
if (param != null) {
for (String key : param.keySet()) {
builder.addParameter(key, param.get(key));
}
}
URI uri = builder.build();
// 创建http GET请求
HttpGet httpGet = new HttpGet(uri);
// 执行请求
response = httpclient.execute(httpGet);
// 判断返回状态是否为200
if (response.getStatusLine().getStatusCode() == 200) {
resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (response != null) {
response.close();
}
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return resultString;
}
public static String doGet(String url) {
return doGet(url, null);
}
public static String doPost(String url, Map<String, String> param) {
// 创建Httpclient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String resultString = "";
try {
// 创建Http Post请求
HttpPost httpPost = new HttpPost(url);
// 创建参数列表
if (param != null) {
List<NameValuePair> paramList = new ArrayList<NameValuePair>();
for (String key : param.keySet()) {
paramList.add(new BasicNameValuePair(key, param.get(key)));
}
// 模拟表单
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8");
httpPost.setEntity(entity);
}
// 执行http请求
response = httpClient.execute(httpPost);
resultString = EntityUtils.toString(response.getEntity(), "utf-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
response.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return resultString;
}
public static String doPost(String url) {
return doPost(url, null);
}
public static String doPostJson(String url, String json) {
// 创建Httpclient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String resultString = "";
try {
// 创建Http Post请求
HttpPost httpPost = new HttpPost(url);
// 创建请求内容
StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
httpPost.setEntity(entity);
// 执行http请求
response = httpClient.execute(httpPost);
resultString = EntityUtils.toString(response.getEntity(), "utf-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
response.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return resultString;
}
}
jsonUtil
import java.util.List;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
public class JsonUtil {
// 定义jackson对象
private static final ObjectMapper mapper = new ObjectMapper();
/**
* 将对象转换成json字符串
* @param data
* @return
*/
public static String toJSONString(Object data) {
try {
String string = mapper.writeValueAsString(data);
return string;
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return null;
}
/**
* 将json结果集转化为对象
* @param jsonData
* @param beanType
* @return
*/
public static <T> T parseObject(String jsonData, Class<T> beanType) {
try {
T t = mapper.readValue(jsonData, beanType);
return t;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 将json数据转换成list
* @param jsonData
* @param beanType
* @return
*/
public static <T> List<T> parseArray(String jsonData, Class<T> beanType) {
JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, beanType);
try {
List<T> list = mapper.readValue(jsonData, javaType);
return list;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
相关依赖
Jsonuntil工具类
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
httpclitutil工具类
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient-cache</artifactId>
<version>4.5</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.3.2</version>
</dependency>