小程序获取用户消息+JAVA后台

前端

<view>
    <view class="login-icon">
        <image class="login-img" src="../resource/images/dsp.jpg"></image>
    </view>
    <view class="login-from">
        <form bindsubmit=‘doLogin‘>
            <!--账号-->
            <view class="inputView">
                <image class="nameImage" src="../resource/images/username.png"></image>
                <label class="loginLabel">账号</label>
                <input name="username" value=‘imooc‘ class="inputText" placeholder="请输入账号" />
            </view>
            <view class="line"></view>

            <!--密码-->
            <view class="inputView">
                <image class="keyImage" src="../resource/images/password.png"></image>
                <label class="loginLabel">密码</label>
                <input name="password" value=‘imooc‘ class="inputText" password="true" placeholder="请输入密码" />
            </view>

            <!--按钮-->
            <view>
                <button class="loginBtn" type="primary">普通登录</button>
            </view>

            <view>
                <button class="goRegistBtn" type="warn" open-type=‘getUserInfo‘ bindgetuserinfo=‘doLogin‘>微信登录</button>
            </view>
        </form>
    </view>
</view>

const app = getApp()

Page({
  data: {
  },

  onLoad: function (params) {

  },

  // 登录  
  doLogin: function (e) {
    console.log(e.detail.errMsg)
    console.log(e.detail.userInfo)
    console.log(e.detail.rawData)

    wx.login({
      success: function(res) {
        console.log(res)
        // 获取登录的临时凭证
        var code = res.code;
        // 调用后端，获取微信的session_key, secret
        wx.request({
          url: "http://192.168.1.2:8080/wxLogin?code=" + code,
          method: "POST",
          success: function(result) {
            console.log(result);
            // 保存用户信息到本地缓存，可以用作小程序端的拦截器
            app.setGlobalUserInfo(e.detail.userInfo);
            wx.redirectTo({
              url: ‘../index/index‘,
            })
          }
        })


      }
    })
  }
})

后端

引入pom文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.imooc</groupId>
	<artifactId>imooc-springboot-wxlogin</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>

	<name>imooc-springboot-wxlogin</name>
	<description>imooc-springboot-wxlogin</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.12.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
			<exclusions>
				<!-- 排除springboot默认的logback日志框架 -->
				<exclusion>
					<groupId>org.springframework.boot</groupId>
					<artifactId>spring-boot-starter-logging</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		
		<!-- 引入log4j日志依赖 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-log4j</artifactId>
			<version>1.3.8.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<scope>provided</scope>
		</dependency>
		
		<!-- apache 工具类 -->
		<dependency>
			<groupId>commons-codec</groupId>
			<artifactId>commons-codec</artifactId>
			<version>1.11</version>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.4</version>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-io</artifactId>
			<version>1.3.2</version>
		</dependency>
		
		<!-- 引入 redis 依赖 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-redis</artifactId>
		</dependency>
		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
			<version>2.9.0</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-redis</artifactId>
			<version>1.8.7.RELEASE</version>
		</dependency>
		
		<!-- httpclient -->
		<dependency>
			<groupId>org.apache.httpcomponents</groupId>
			<artifactId>httpclient</artifactId>
			<version>4.3.5</version>
		</dependency>
	</dependencies>

</project>

定义model

package com.imooc.model;

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;
	}
}

controller

package com.imooc.controller;

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.databind.annotation.JsonAppend.Attr;
import com.imooc.common.HttpClientUtil;
import com.imooc.common.IMoocJSONResult;
import com.imooc.common.JsonUtils;
import com.imooc.common.RedisOperator;
import com.imooc.model.WXSessionModel;

@RestController
public class WXLoginController {
	
	@Autowired
	private RedisOperator redis;
	

	@PostMapping("/wxLogin")
	public IMoocJSONResult wxLogin(String code) {
		
		System.out.println("wxlogin - code: " + code);
		
//		https://api.weixin.qq.com/sns/jscode2session?
//				appid=APPID&
//				secret=SECRET&
//				js_code=JSCODE&
//				grant_type=authorization_code
		
		String url = "https://api.weixin.qq.com/sns/jscode2session";
		Map<String, String> param = new HashMap<>();
		param.put("appid", "wxa2049f5aead89372");
		param.put("secret", "3a62d9b55028c644bacdd8412fada021");
		param.put("js_code", code);
		param.put("grant_type", "authorization_code");
		
		String wxResult = HttpClientUtil.doGet(url, param);
		System.out.println(wxResult);
		
		WXSessionModel model = JsonUtils.jsonToPojo(wxResult, WXSessionModel.class);
		
		// 存入session到redis
		redis.set("user-redis-session:" + model.getOpenid(), 
							model.getSession_key(), 
							1000 * 60 * 30);
		
		return IMoocJSONResult.ok();
	}
	
}

工具类

package com.imooc.common;

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<>();
				for (String key : param.keySet()) {
					paramList.add(new BasicNameValuePair(key, param.get(key)));
				}
				// 模拟表单
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
				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) {
				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) {
				e.printStackTrace();
			}
		}

		return resultString;
	}
}

package com.imooc.common;

/**
 * @Description: 自定义响应数据结构
 * 				这个类是提供给门户，ios，安卓，微信商城用的
 * 				门户接受此类数据后需要使用本类的方法转换成对于的数据类型格式（类，或者list）
 * 				其他自行处理
 * 				200：表示成功
 * 				500：表示错误，错误信息在msg字段中
 * 				501：bean验证错误，不管多少个错误都以map形式返回
 * 				502：拦截器拦截到用户token出错
 * 				555：异常抛出信息
 */
public class IMoocJSONResult {

    // 响应业务状态
    private Integer status;

    // 响应消息
    private String msg;

    // 响应中的数据
    private Object data;
    
    private String ok;	// 不使用

    public static IMoocJSONResult build(Integer status, String msg, Object data) {
        return new IMoocJSONResult(status, msg, data);
    }

    public static IMoocJSONResult ok(Object data) {
        return new IMoocJSONResult(data);
    }

    public static IMoocJSONResult ok() {
        return new IMoocJSONResult(null);
    }
    
    public static IMoocJSONResult errorMsg(String msg) {
        return new IMoocJSONResult(500, msg, null);
    }
    
    public static IMoocJSONResult errorMap(Object data) {
        return new IMoocJSONResult(501, "error", data);
    }
    
    public static IMoocJSONResult errorTokenMsg(String msg) {
        return new IMoocJSONResult(502, msg, null);
    }
    
    public static IMoocJSONResult errorException(String msg) {
        return new IMoocJSONResult(555, msg, null);
    }

    public IMoocJSONResult() {

    }

    public IMoocJSONResult(Integer status, String msg, Object data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public IMoocJSONResult(Object data) {
        this.status = 200;
        this.msg = "OK";
        this.data = data;
    }

    public Boolean isOK() {
        return this.status == 200;
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

	public String getOk() {
		return ok;
	}

	public void setOk(String ok) {
		this.ok = ok;
	}

}

package com.imooc.common;

import java.util.List;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * 
 * @Title: JsonUtils.java
 * @Package com.lee.utils
 * @Description: 自定义响应结构, 转换类
 * Copyright: Copyright (c) 2016
 * Company:Nathan.Lee.Salvatore
 * 
 * @author leechenxiang
 * @date 2016年4月29日 下午11:05:03
 * @version V1.0
 */
public class JsonUtils {

    // 定义jackson对象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    /**
     * 将对象转换成json字符串。
     * <p>Title: pojoToJson</p>
     * <p>Description: </p>
     * @param data
     * @return
     */
    public static String objectToJson(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 json数据
     * @param clazz 对象中的object类型
     * @return
     */
    public static <T> T jsonToPojo(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pojo对象list
     * <p>Title: jsonToList</p>
     * <p>Description: </p>
     * @param jsonData
     * @param beanType
     * @return
     */
    public static <T>List<T> jsonToList(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;
    }
    
}

package com.imooc.common;

import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

/**
 * @Description: 使用redisTemplate的操作实现类 
 */
@Component
public class RedisOperator {
	
//	@Autowired
//    private RedisTemplate<String, Object> redisTemplate;
	
	@Autowired
	private StringRedisTemplate redisTemplate;
	
	// Key（键），简单的key-value操作

	/**
	 * 实现命令：TTL key，以秒为单位，返回给定 key的剩余生存时间(TTL, time to live)。
	 * 
	 * @param key
	 * @return
	 */
	public long ttl(String key) {
		return redisTemplate.getExpire(key);
	}
	
	/**
	 * 实现命令：expire 设置过期时间，单位秒
	 * 
	 * @param key
	 * @return
	 */
	public void expire(String key, long timeout) {
		redisTemplate.expire(key, timeout, TimeUnit.SECONDS);
	}
	
	/**
	 * 实现命令：INCR key，增加key一次
	 * 
	 * @param key
	 * @return
	 */
	public long incr(String key, long delta) {
		return redisTemplate.opsForValue().increment(key, delta);
	}

	/**
	 * 实现命令：KEYS pattern，查找所有符合给定模式 pattern的 key
	 */
	public Set<String> keys(String pattern) {
		return redisTemplate.keys(pattern);
	}

	/**
	 * 实现命令：DEL key，删除一个key
	 * 
	 * @param key
	 */
	public void del(String key) {
		redisTemplate.delete(key);
	}

	// String（字符串）

	/**
	 * 实现命令：SET key value，设置一个key-value（将字符串值 value关联到 key）
	 * 
	 * @param key
	 * @param value
	 */
	public void set(String key, String value) {
		redisTemplate.opsForValue().set(key, value);
	}

	/**
	 * 实现命令：SET key value EX seconds，设置key-value和超时时间（秒）
	 * 
	 * @param key
	 * @param value
	 * @param timeout
	 *            （以秒为单位）
	 */
	public void set(String key, String value, long timeout) {
		redisTemplate.opsForValue().set(key, value, timeout, TimeUnit.SECONDS);
	}

	/**
	 * 实现命令：GET key，返回 key所关联的字符串值。
	 * 
	 * @param key
	 * @return value
	 */
	public String get(String key) {
		return (String)redisTemplate.opsForValue().get(key);
	}

	// Hash（哈希表）

	/**
	 * 实现命令：HSET key field value，将哈希表 key中的域 field的值设为 value
	 * 
	 * @param key
	 * @param field
	 * @param value
	 */
	public void hset(String key, String field, Object value) {
		redisTemplate.opsForHash().put(key, field, value);
	}

	/**
	 * 实现命令：HGET key field，返回哈希表 key中给定域 field的值
	 * 
	 * @param key
	 * @param field
	 * @return
	 */
	public String hget(String key, String field) {
		return (String) redisTemplate.opsForHash().get(key, field);
	}

	/**
	 * 实现命令：HDEL key field [field ...]，删除哈希表 key 中的一个或多个指定域，不存在的域将被忽略。
	 * 
	 * @param key
	 * @param fields
	 */
	public void hdel(String key, Object... fields) {
		redisTemplate.opsForHash().delete(key, fields);
	}

	/**
	 * 实现命令：HGETALL key，返回哈希表 key中，所有的域和值。
	 * 
	 * @param key
	 * @return
	 */
	public Map<Object, Object> hgetall(String key) {
		return redisTemplate.opsForHash().entries(key);
	}

	// List（列表）

	/**
	 * 实现命令：LPUSH key value，将一个值 value插入到列表 key的表头
	 * 
	 * @param key
	 * @param value
	 * @return 执行 LPUSH命令后，列表的长度。
	 */
	public long lpush(String key, String value) {
		return redisTemplate.opsForList().leftPush(key, value);
	}

	/**
	 * 实现命令：LPOP key，移除并返回列表 key的头元素。
	 * 
	 * @param key
	 * @return 列表key的头元素。
	 */
	public String lpop(String key) {
		return (String)redisTemplate.opsForList().leftPop(key);
	}

	/**
	 * 实现命令：RPUSH key value，将一个值 value插入到列表 key的表尾(最右边)。
	 * 
	 * @param key
	 * @param value
	 * @return 执行 LPUSH命令后，列表的长度。
	 */
	public long rpush(String key, String value) {
		return redisTemplate.opsForList().rightPush(key, value);
	}

}

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