#193 增加小程序模块weixin-java-miniapp，支持小程序后台开发

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/config/WxMaConfig.java

@@ -0,0 +1,73 @@
+package cn.binarywang.wx.miniapp.config;
+
+import me.chanjar.weixin.common.bean.WxAccessToken;
+import me.chanjar.weixin.common.util.http.apache.ApacheHttpClientBuilder;
+
+import java.util.concurrent.locks.Lock;
+
+/**
+ * 小程序配置
+ *
+ * @author <a href="https://github.com/binarywang">Binary Wang</a>
+ */
+public interface WxMaConfig {
+
+  String getAccessToken();
+
+  Lock getAccessTokenLock();
+
+  boolean isAccessTokenExpired();
+
+  /**
+   * 强制将access token过期掉
+   */
+  void expireAccessToken();
+
+  /**
+   * 应该是线程安全的
+   *
+   * @param accessToken 要更新的WxAccessToken对象
+   */
+  void updateAccessToken(WxAccessToken accessToken);
+
+  /**
+   * 应该是线程安全的
+   *
+   * @param accessToken      新的accessToken值
+   * @param expiresInSeconds 过期时间，以秒为单位
+   */
+  void updateAccessToken(String accessToken, int expiresInSeconds);
+
+  String getAppid();
+
+  String getSecret();
+
+  String getToken();
+
+  String getAesKey();
+
+  String getMsgDataFormat();
+
+  long getExpiresTime();
+
+  String getHttpProxyHost();
+
+  int getHttpProxyPort();
+
+  String getHttpProxyUsername();
+
+  String getHttpProxyPassword();
+
+  /**
+   * http client builder
+   *
+   * @return ApacheHttpClientBuilder
+   */
+  ApacheHttpClientBuilder getApacheHttpClientBuilder();
+
+  /**
+   * 是否自动刷新token
+   */
+  boolean autoRefreshToken();
+
+}

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/config/WxMaInMemoryConfig.java

@@ -0,0 +1,185 @@
+package cn.binarywang.wx.miniapp.config;
+
+import me.chanjar.weixin.common.bean.WxAccessToken;
+import me.chanjar.weixin.common.util.ToStringUtils;
+import me.chanjar.weixin.common.util.http.apache.ApacheHttpClientBuilder;
+
+import java.io.File;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * 基于内存的微信配置provider，在实际生产环境中应该将这些配置持久化
+ *
+ * @author <a href="https://github.com/binarywang">Binary Wang</a>
+ */
+public class WxMaInMemoryConfig implements WxMaConfig {
+  protected volatile String msgDataFormat;
+  protected volatile String appid;
+  protected volatile String secret;
+  protected volatile String token;
+  protected volatile String accessToken;
+  protected volatile String aesKey;
+  protected volatile long expiresTime;
+
+  protected volatile String httpProxyHost;
+  protected volatile int httpProxyPort;
+  protected volatile String httpProxyUsername;
+  protected volatile String httpProxyPassword;
+
+  protected Lock accessTokenLock = new ReentrantLock();
+
+  /**
+   * 临时文件目录
+   */
+  protected volatile File tmpDirFile;
+
+  protected volatile ApacheHttpClientBuilder apacheHttpClientBuilder;
+
+  @Override
+  public String getAccessToken() {
+    return this.accessToken;
+  }
+
+  public void setAccessToken(String accessToken) {
+    this.accessToken = accessToken;
+  }
+
+  @Override
+  public Lock getAccessTokenLock() {
+    return this.accessTokenLock;
+  }
+
+  public void setAccessTokenLock(Lock accessTokenLock) {
+    this.accessTokenLock = accessTokenLock;
+  }
+
+  @Override
+  public boolean isAccessTokenExpired() {
+    return System.currentTimeMillis() > this.expiresTime;
+  }
+
+  @Override
+  public synchronized void updateAccessToken(WxAccessToken accessToken) {
+    updateAccessToken(accessToken.getAccessToken(), accessToken.getExpiresIn());
+  }
+
+  @Override
+  public synchronized void updateAccessToken(String accessToken, int expiresInSeconds) {
+    this.accessToken = accessToken;
+    this.expiresTime = System.currentTimeMillis() + (expiresInSeconds - 200) * 1000L;
+  }
+
+  @Override
+  public void expireAccessToken() {
+    this.expiresTime = 0;
+  }
+
+  @Override
+  public String getSecret() {
+    return this.secret;
+  }
+
+  public void setSecret(String secret) {
+    this.secret = secret;
+  }
+
+  @Override
+  public String getToken() {
+    return this.token;
+  }
+
+  public void setToken(String token) {
+    this.token = token;
+  }
+
+  @Override
+  public long getExpiresTime() {
+    return this.expiresTime;
+  }
+
+  public void setExpiresTime(long expiresTime) {
+    this.expiresTime = expiresTime;
+  }
+
+  @Override
+  public String getAesKey() {
+    return this.aesKey;
+  }
+
+  public void setAesKey(String aesKey) {
+    this.aesKey = aesKey;
+  }
+
+  @Override
+  public String getMsgDataFormat() {
+    return this.msgDataFormat;
+  }
+
+  public void setMsgDataFormat(String msgDataFormat) {
+    this.msgDataFormat = msgDataFormat;
+  }
+
+  @Override
+  public String getHttpProxyHost() {
+    return this.httpProxyHost;
+  }
+
+  public void setHttpProxyHost(String httpProxyHost) {
+    this.httpProxyHost = httpProxyHost;
+  }
+
+  @Override
+  public int getHttpProxyPort() {
+    return this.httpProxyPort;
+  }
+
+  public void setHttpProxyPort(int httpProxyPort) {
+    this.httpProxyPort = httpProxyPort;
+  }
+
+  @Override
+  public String getHttpProxyUsername() {
+    return this.httpProxyUsername;
+  }
+
+  public void setHttpProxyUsername(String httpProxyUsername) {
+    this.httpProxyUsername = httpProxyUsername;
+  }
+
+  @Override
+  public String getHttpProxyPassword() {
+    return this.httpProxyPassword;
+  }
+
+  public void setHttpProxyPassword(String httpProxyPassword) {
+    this.httpProxyPassword = httpProxyPassword;
+  }
+
+  @Override
+  public String toString() {
+    return ToStringUtils.toSimpleString(this);
+  }
+
+  @Override
+  public ApacheHttpClientBuilder getApacheHttpClientBuilder() {
+    return this.apacheHttpClientBuilder;
+  }
+
+  public void setApacheHttpClientBuilder(ApacheHttpClientBuilder apacheHttpClientBuilder) {
+    this.apacheHttpClientBuilder = apacheHttpClientBuilder;
+  }
+
+  @Override
+  public boolean autoRefreshToken() {
+    return true;
+  }
+
+  public String getAppid() {
+    return appid;
+  }
+
+  public void setAppid(String appid) {
+    this.appid = appid;
+  }
+}