引入自定义ToString工具类和方法，便于查看部分bean对象值

Author: binarywang

weixin-java-common/src/main/java/me/chanjar/weixin/common/bean/WxCardApiSignature.java

@@ -1,9 +1,8 @@
 package me.chanjar.weixin.common.bean;
 
-import java.io.Serializable;
+import me.chanjar.weixin.common.util.ToStringUtils;
 
-import org.apache.commons.lang3.builder.ToStringBuilder;
-import org.apache.commons.lang3.builder.ToStringStyle;
+import java.io.Serializable;
 
 /**
  * 卡券Api签名
@@ -35,7 +34,7 @@ public class WxCardApiSignature implements Serializable {
 
   @Override
   public String toString() {
-    return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);
+    return ToStringUtils.toSimpleString(this);
   }
 
   public String getAppId() {

weixin-java-common/src/main/java/me/chanjar/weixin/common/bean/menu/WxMenuButton.java

@@ -1,11 +1,10 @@
 package me.chanjar.weixin.common.bean.menu;
 
+import me.chanjar.weixin.common.util.ToStringUtils;
+
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.commons.lang3.builder.ToStringBuilder;
-import org.apache.commons.lang3.builder.ToStringStyle;
-
 public class WxMenuButton {
 
   private String type;
@@ -18,10 +17,9 @@ public class WxMenuButton {
 
   @Override
   public String toString() {
-    return ToStringBuilder.reflectionToString(this, 
-        ToStringStyle.MULTI_LINE_STYLE);
+    return ToStringUtils.toSimpleString(this);
   }
-  
+
   public String getType() {
     return this.type;
   }
@@ -69,4 +67,4 @@ public String getMediaId() {
   public void setMediaId(String mediaId) {
     this.mediaId = mediaId;
   }
-}
+}

weixin-java-common/src/main/java/me/chanjar/weixin/common/bean/menu/WxMenuRule.java

@@ -1,7 +1,6 @@
 package me.chanjar.weixin.common.bean.menu;
 
-import org.apache.commons.lang3.builder.ToStringBuilder;
-import org.apache.commons.lang3.builder.ToStringStyle;
+import me.chanjar.weixin.common.util.ToStringUtils;
 
 public class WxMenuRule {
   private String tagId;
@@ -70,6 +69,6 @@ public void setLanguage(String language) {
 
   @Override
   public String toString() {
-    return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);
+    return ToStringUtils.toSimpleString(this);
   }
-}
+}

weixin-java-common/src/main/java/me/chanjar/weixin/common/util/StringUtils.java

@@ -0,0 +1,61 @@
+package me.chanjar.weixin.common.util;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.builder.ToStringBuilder;
+import org.apache.commons.lang3.builder.ToStringStyle;
+
+/**
+ * <pre>
+ * 自定义的ToString方法，用于产生去掉空值属性的字符串
+ * Created by Binary Wang on 2016-10-27.
+ * @author <a href="https://github.com/binarywang">binarywang(Binary Wang)</a>
+ * </pre>
+ */
+public class ToStringUtils {
+  public static final ToStringStyle THE_STYLE = new SimpleMultiLineToStringStyle();
+  private static class SimpleMultiLineToStringStyle extends ToStringStyle {
+    private static final long serialVersionUID = 4645306494220335355L;
+    private static final String LINE_SEPARATOR = "\n";
+    private static final String NULL_TEXT = "<null>";
+
+    public SimpleMultiLineToStringStyle() {
+      super();
+      this.setContentStart("[");
+      this.setFieldSeparator(LINE_SEPARATOR + "  ");
+      this.setFieldSeparatorAtStart(true);
+      this.setContentEnd(LINE_SEPARATOR + "]");
+      this.setNullText(NULL_TEXT);
+      this.setUseShortClassName(true);
+      this.setUseIdentityHashCode(false);
+    }
+  }
+
+  /**
+   * 用于产生去掉空值属性并以换行符分割各属性键值的toString字符串
+   * @param obj
+   */
+  public static String toSimpleString(Object obj) {
+    String toStringResult = ToStringBuilder.reflectionToString(obj, THE_STYLE);
+    String[] split = toStringResult.split(SimpleMultiLineToStringStyle.LINE_SEPARATOR);
+    StringBuilder result = new StringBuilder();
+    for (String string : split) {
+      if (string.endsWith(SimpleMultiLineToStringStyle.NULL_TEXT)) {
+        continue;
+      }
+
+      result.append(string + SimpleMultiLineToStringStyle.LINE_SEPARATOR);
+    }
+
+    if (result.length() == 0) {
+      return "";
+    }
+
+    //如果没有非空的属性，就输出 <all null properties>
+    if (StringUtils.countMatches(result, SimpleMultiLineToStringStyle.LINE_SEPARATOR) == 2) {
+      return result.toString().split(SimpleMultiLineToStringStyle.LINE_SEPARATOR)[0]
+        + "<all null values>]";
+    }
+
+    return result.deleteCharAt(result.length() - 1).toString();
+  }
+}

weixin-java-common/src/main/java/me/chanjar/weixin/common/util/ToStringUtils.java

@@ -1,6 +1,6 @@
 package me.chanjar.weixin.common.util.http;
 
-import me.chanjar.weixin.common.util.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.http.annotation.NotThreadSafe;
 import org.apache.http.auth.AuthScope;
 import org.apache.http.auth.UsernamePasswordCredentials;

weixin-java-common/src/main/java/me/chanjar/weixin/common/util/http/DefaultApacheHttpClientBuilder.java

@@ -2,8 +2,8 @@
 
 import me.chanjar.weixin.common.bean.result.WxError;
 import me.chanjar.weixin.common.exception.WxErrorException;
-import me.chanjar.weixin.common.util.StringUtils;
 import me.chanjar.weixin.common.util.fs.FileUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.http.Header;
 import org.apache.http.HttpHost;
 import org.apache.http.client.config.RequestConfig;

weixin-java-common/src/main/java/me/chanjar/weixin/common/util/http/MediaDownloadRequestExecutor.java

@@ -1,6 +1,7 @@
 package me.chanjar.weixin.common.util.http;
 
-import me.chanjar.weixin.common.util.StringUtils;
+
+import org.apache.commons.lang3.StringUtils;
 
 import java.io.UnsupportedEncodingException;
 

weixin-java-common/src/main/java/me/chanjar/weixin/common/util/http/URIUtil.java

@@ -1,13 +1,11 @@
 package me.chanjar.weixin.cp.api;
 
-import java.io.File;
-
-import org.apache.commons.lang3.builder.ToStringBuilder;
-import org.apache.commons.lang3.builder.ToStringStyle;
-
 import me.chanjar.weixin.common.bean.WxAccessToken;
+import me.chanjar.weixin.common.util.ToStringUtils;
 import me.chanjar.weixin.common.util.http.ApacheHttpClientBuilder;
 
+import java.io.File;
+
 /**
  * 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
  *
@@ -203,7 +201,7 @@ public void setHttpProxyPassword(String httpProxyPassword) {
 
   @Override
   public String toString() {
-    return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);
+    return ToStringUtils.toSimpleString(this);
   }
 
   @Override

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpInMemoryConfigStorage.java

@@ -1,13 +1,10 @@
 package me.chanjar.weixin.mp.api;
 
 import me.chanjar.weixin.common.bean.WxAccessToken;
+import me.chanjar.weixin.common.util.ToStringUtils;
 import me.chanjar.weixin.common.util.http.ApacheHttpClientBuilder;
 
 import javax.net.ssl.SSLContext;
-
-import org.apache.commons.lang3.builder.ToStringBuilder;
-import org.apache.commons.lang3.builder.ToStringStyle;
-
 import java.io.File;
 
 /**
@@ -43,7 +40,7 @@ public class WxMpInMemoryConfigStorage implements WxMpConfigStorage {
    * 临时文件目录
    */
   protected volatile File tmpDirFile;
-  
+
   protected volatile SSLContext sslContext;
 
   protected volatile ApacheHttpClientBuilder apacheHttpClientBuilder;
@@ -62,7 +59,7 @@ public boolean isAccessTokenExpired() {
   public synchronized void updateAccessToken(WxAccessToken accessToken) {
     updateAccessToken(accessToken.getAccessToken(), accessToken.getExpiresIn());
   }
-  
+
   @Override
   public synchronized void updateAccessToken(String accessToken, int expiresInSeconds) {
     this.accessToken = accessToken;
@@ -229,7 +226,7 @@ public void setHttpProxyPassword(String httpProxyPassword) {
 
   @Override
   public String toString() {
-    return ToStringBuilder.reflectionToString(this,ToStringStyle.MULTI_LINE_STYLE);
+    return ToStringUtils.toSimpleString(this);
   }
 
   @Override
@@ -263,7 +260,7 @@ public void setTmpDirFile(File tmpDirFile) {
   public SSLContext getSSLContext() {
     return this.sslContext;
   }
-  
+
   public void setSSLContext(SSLContext context) {
     this.sslContext = context;
   }