weixin-popular

微信公眾平臺Java SDK

簡介:

weixin-popular 包括微信公眾平臺基礎API與支付API,提供便捷的API調用接口.

API 列表:

MediaAPI 多媒體上傳下載
MenuAPI 菜單
MessageAPI 信息發送
PayAPI 支付訂單相關接口
QrcodeAPI 二維碼
SnsAPI 網簽授權
TokenAPI token 獲取
UserAPI 用戶管理

工具類

PayUtil 支付工具類，生成JS支付，原生支付
SignatureUtil 簽權生成、驗證
XMLConverUtil XML 對象轉換（JAXB）

消息接收示例代碼:

import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;

import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.util.StreamUtils;

import weixin.popular.bean.EventMessage;
import weixin.popular.bean.xmlmessage.XMLTextMessage;
import weixin.popular.util.SignatureUtil;
import weixin.popular.util.XMLConverUtil;

public class ReceiveServlet extends HttpServlet{

private String token = "test";

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    ServletInputStream inputStream = request.getInputStream();
    ServletOutputStream outputStream = response.getOutputStream();
    String signature = request.getParameter("signature");
    String timestamp = request.getParameter("timestamp");
    String nonce = request.getParameter("nonce");
    String echostr = request.getParameter("echostr");

    //首次請求申請驗證,返回echostr
    if(echostr!=null){
        outputStreamWrite(outputStream,echostr);
        return;
    }

    //驗證請求簽名
    if(!signature.equals(SignatureUtil.generateEventMessageSignature(token,timestamp,nonce))){
        System.out.println("The request signature is invalid");
        return;
    }

    if(inputStream!=null){
        String xml = StreamUtils.copyToString(inputStream,Charset.forName("utf-8"));
        System.out.println("xml: "+xml);
        //轉換XML
        EventMessage eventMessage = XMLConverUtil.convertToObject(EventMessage.class,xml);
        //創建回復
        XMLTextMessage xmlTextMessage = new XMLTextMessage(
                eventMessage.getFromUserName(), 
                eventMessage.getToUserName(),
                "你好");
        //回復
        xmlTextMessage.outputStreamWrite(outputStream);
        return;
    }
    outputStreamWrite(outputStream,"");
}

/**
 * 數據流輸出
 * @param outputStream
 * @param text
 * @return
 */
private boolean outputStreamWrite(OutputStream outputStream,String text){
    try {
        outputStream.write(text.getBytes("utf-8"));
    } catch (UnsupportedEncodingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return false;
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return false;
    }
    return true;
}

}