ResponseHandler.java

package jframe.pay.wx.http;

import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;

import jframe.pay.wx.domain.WxConfig;
import jframe.pay.wx.http.util.MD5Util;

/**
 * 应答处理类 应答处理类继承此类，重写isTenpaySign方法即可。
 * 
 * @author miklchen
 * 
 */
public class ResponseHandler {

    /** 密钥 */
    private String key;

    /** 应答的参数 */
    private SortedMap<String, String> parameters;

    /** debug信息 */
    private String debugInfo;

    private String uriEncoding;

    /**
     * 构造函数
     * 
     * @param request
     * @param response
     */
    // public ResponseHandler(Map<String, List<String>> paraMap) {
    // this.key = "";
    // this.parameters = new TreeMap<>();
    // this.debugInfo = "";
    //
    // this.uriEncoding = "";
    //
    // Map<String, List<String>> m = paraMap;
    // Iterator<String> it = m.keySet().iterator();
    // while (it.hasNext()) {
    // String k = it.next();
    // String v = m.get(k).get(0);
    // setParameter(k, v);
    // }
    //
    // }

    public ResponseHandler(Map<String, String> paraMap) {
        this.key = "";
        this.parameters = new TreeMap<>();
        this.debugInfo = "";

        this.uriEncoding = "";

        Iterator<String> it = paraMap.keySet().iterator();
        while (it.hasNext()) {
            String k = it.next();
            String v = paraMap.get(k);
            setParameter(k, v);
        }

    }

    /**
     * 获取密钥
     */
    public String getKey() {
        return key;
    }

    /**
     * 设置密钥
     */
    public void setKey(String key) {
        this.key = key;
    }

    /**
     * 获取参数值
     * 
     * @param parameter
     *            参数名称
     * @return String
     */
    public String getParameter(String parameter) {
        String s = (String) this.parameters.get(parameter);
        return (null == s) ? "" : s;
    }

    /**
     * 设置参数值
     * 
     * @param parameter
     *            参数名称
     * @param parameterValue
     *            参数值
     */
    public void setParameter(String parameter, String parameterValue) {
        String v = "";
        if (null != parameterValue) {
            v = parameterValue.trim();
        }
        this.parameters.put(parameter, v);
    }

    /**
     * 返回所有的参数
     * 
     * @return SortedMap
     */
    @SuppressWarnings("rawtypes")
    public SortedMap getAllParameters() {
        return this.parameters;
    }

    /**
     * 是否财付通签名,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。
     * 
     * @return boolean
     */
    @SuppressWarnings("rawtypes")
    public boolean isTenpaySign() {
        StringBuffer sb = new StringBuffer();
        Set es = this.parameters.entrySet();
        Iterator it = es.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String k = (String) entry.getKey();
            String v = (String) entry.getValue();
            if (!"sign".equals(k) && null != v && !"".equals(v)) {
                sb.append(k + "=" + v + "&");
            }
        }

        sb.append("key=" + this.getKey());

        // 算出摘要
        // String enc = TenpayUtil.getCharacterEncoding(this.request,
        // this.response);
        String enc = WxConfig.getConf(WxConfig.KEY_CHARSET);
        String sign = MD5Util.MD5Encode(sb.toString(), enc).toLowerCase();

        String tenpaySign = this.getParameter("sign").toLowerCase();

        // debug信息
        this.setDebugInfo(sb.toString() + " => sign:" + sign + " tenpaySign:"
                + tenpaySign);

        return tenpaySign.equals(sign);
    }

    /**
     * 返回处理结果给财付通服务器。
     * 
     * @param msg
     *            : Success or fail。
     * @throws IOException
     */
    // public void sendToCFT(String msg) throws IOException {
    // String strHtml = msg;
    // PrintWriter out = this.getHttpServletResponse().getWriter();
    // out.println(strHtml);
    // out.flush();
    // out.close();
    //
    // }

    /**
     * 获取uri编码
     * 
     * @return String
     */
    public String getUriEncoding() {
        return uriEncoding;
    }

    /**
     * 设置uri编码
     * 
     * @param uriEncoding
     * @throws UnsupportedEncodingException
     */
    @SuppressWarnings("rawtypes")
    public void setUriEncoding(String uriEncoding)
            throws UnsupportedEncodingException {
        if (!"".equals(uriEncoding.trim())) {
            this.uriEncoding = uriEncoding;

            // 编码转换
            // String enc = TenpayUtil.getCharacterEncoding(request, response);
            String enc = WxConfig.getConf(WxConfig.KEY_CHARSET);
            Iterator it = parameters.keySet().iterator();
            while (it.hasNext()) {
                String k = (String) it.next();
                String v = getParameter(k);
                v = new String(v.getBytes(uriEncoding.trim()), enc);
                this.setParameter(k, v);
            }
        }
    }

    /**
     * 获取debug信息
     */
    public String getDebugInfo() {
        return debugInfo;
    }

    /**
     * 设置debug信息
     */
    protected void setDebugInfo(String debugInfo) {
        this.debugInfo = debugInfo;
    }

}