获取用户信息（也可获取UnionID）

	/**
	 * 获取用户信息
	 * @param openId  用户唯一标识
	 * @return
	 * @throws Exception
	 */
	public WXUserInfo getUserInfo(String openId) throws Exception {
		String userInfoStr = HttpRequest.sendGet("https://api.weixin.qq.com/cgi-bin/user/info",
				"access_token=" + getAccessToken() + "&openid=" + openId + "&lang=zh_CN");
		Gson gson = new Gson();
		WXUserInfo wxUserInfo = gson.fromJson(userInfoStr, WXUserInfo.class);
		System.out.println(userInfoStr);
		return wxUserInfo;
	}

OpenID为关注公众号后的每个用户的唯一标示

/**
 *微信用户信息
 * @author Draven
 * @date 2016年9月28日
 * @e-mail [email protected]
 */
public class WXUserInfo {
	private int subscribe;//用户是否关注公众号 1关注0未关注
	private String openid; //用户相对公众号唯一标识
	private String nickname;//用户昵称
	private int sex;//用户性别 1男性2女性0未知
	private String city;//用户所在城市
	private String language;//用户使用语言;
	private String province;//用户所在省份;
	private String country;//用户所在国家;
	private String headimgurl;//用户头像，最后一个数值代表正方形头像大小（有0、46、64、96、132数值可选，0代表640*640正方形头像），用户没有头像时该项为空。若用户更换头像，原有头像URL将失效。
	private String subscribe_time;//用户关注公众号时间;
	private String unionid;//只有在用户将公众号绑定到微信开放平台帐号后，才会出现该字段。详见：获取用户个人信息（UnionID机制）
	private String remark;//	公众号运营者对粉丝的备注，公众号运营者可在微信公众平台用户管理界面对粉丝添加备注
	private int  groupid;//	用户所在的分组ID
	public int getSubscribe() {
		return subscribe;
	}
	public void setSubscribe(int subscribe) {
		this.subscribe = subscribe;
	}
	public String getOpenid() {
		return openid;
	}
	public void setOpenid(String openid) {
		this.openid = openid;
	}
	public String getNickname() {
		return nickname;
	}
	public void setNickname(String nickname) {
		this.nickname = nickname;
	}
	public int getSex() {
		return sex;
	}
	public void setSex(int sex) {
		this.sex = sex;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	public String getLanguage() {
		return language;
	}
	public void setLanguage(String language) {
		this.language = language;
	}
	public String getProvince() {
		return province;
	}
	public void setProvince(String province) {
		this.province = province;
	}
	public String getCountry() {
		return country;
	}
	public void setCountry(String country) {
		this.country = country;
	}
	public String getHeadimgurl() {
		return headimgurl;
	}
	public void setHeadimgurl(String headimgurl) {
		this.headimgurl = headimgurl;
	}
	public String getSubscribe_time() {
		return subscribe_time;
	}
	public void setSubscribe_time(String subscribe_time) {
		this.subscribe_time = subscribe_time;
	}
	public String getUnionid() {
		return unionid;
	}
	public void setUnionid(String unionid) {
		this.unionid = unionid;
	}
	public String getRemark() {
		return remark;
	}
	public void setRemark(String remark) {
		this.remark = remark;
	}
	public int getGroupid() {
		return groupid;
	}
	public void setGroupid(int groupid) {
		this.groupid = groupid;
	}
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return "昵称："+this.nickname+"\n"+
		"所在国家："+this.country+"\n"+
		"所在省份："+this.province+"\n"+
		"所在城市："+this.city+"\n";
	}
	
}

需要gson