Java开发微信小程序授权登录

最近对接开发微信小程序，需要获取用户的openid使用支付，所以记下这篇通用小程序授权笔记。

这里使用到开源工具

此致 致敬  大佬 

maven引入如下

<!-- https://mvnrepository.com/artifact/com.github.binarywang/weixin-java-miniapp -->
<dependency>
    <groupId>com.github.binarywang</groupId>
    <artifactId>weixin-java-miniapp</artifactId>
    <version>4.3.3.B</version>
</dependency>

准备参数，application配置文件需配置参数

wx:
  miniapp:
    appid: 微信官方申请的appid
    secret: 微信官方申请的秘钥
    msgDataFormat: JSON #数据可以，默认json就ok

编写WxMaProperties.java文件获取配置文件中的字段

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;


@Data
@ConfigurationProperties(prefix = "wx.miniapp")
public class WxMaProperties {
    /**
     * 设置微信小程序的appid
     */
    private String appid;

    /**
     * 设置微信小程序的Secret
     */
    private String secret;

    /**
     * 消息格式，XML或者JSON
     */
    private String msgDataFormat;
}

创建配置类WxMaConfiguration配置初始化配置

import cn.binarywang.wx.miniapp.api.WxMaService;
import cn.binarywang.wx.miniapp.api.impl.WxMaServiceImpl;
import cn.binarywang.wx.miniapp.config.impl.WxMaDefaultConfigImpl;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;


@Configuration
@EnableConfigurationProperties(WxMaProperties.class)
public class WxMaConfiguration {
    @Bean
    public WxMaService wxMaService(WxMaProperties properties) {
        WxMaDefaultConfigImpl config = new WxMaDefaultConfigImpl();
        config.setAppid(properties.getAppid());
        config.setSecret(properties.getSecret());
        config.setMsgDataFormat(properties.getMsgDataFormat());

        WxMaService service = new WxMaServiceImpl();
        service.setWxMaConfig(config);
        return service;
    }
}

controller编写授权代码

import cn.binarywang.wx.miniapp.api.WxMaService;
import cn.binarywang.wx.miniapp.bean.WxMaJscode2SessionResult;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.RequiredArgsConstructor;
import lombok.SneakyThrows;
import me.chanjar.weixin.common.error.WxErrorException;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@Api(tags = "微信模块")
@RestController
@RequestMapping("/wx/auth")
@RequiredArgsConstructor
public class WxController extends BaseController {
    private final WxMaService wxService;

    @ApiOperation("微信登陆")
    @GetMapping(value = "/getWxInfo", produces = "application/json")
    @SneakyThrows(WxErrorException.class)
    public WxMaJscode2SessionResult getWxInfo(@ApiParam("小程序CODE") String code){
        WxMaJscode2SessionResult wx = wxService.jsCode2SessionInfo(code);
        logger.info("请求微信授权完成=>{}",wx);
        return wx;
    }
}

非常简单，俩行代码直接搞定授权。

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