添加引用网络图片功能，支持以http:开头的网络图片

ureport2-core/src/main/java/com/bstek/ureport/provider/image/HttpImageProvider.java

@@ -0,0 +1,48 @@
+/*******************************************************************************
+ * Copyright 2017 Bstek
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License.  You may obtain a copy
+ * of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ ******************************************************************************/
+package com.bstek.ureport.provider.image;
+
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+
+import com.bstek.ureport.exception.ReportException;
+
+/**
+ * @author Jacky.gao
+ * @since 2017年12月11日
+ */
+public class HttpImageProvider implements ImageProvider {
+
+	@Override
+	public InputStream getImage(String path) {
+		try{
+			URL url=new URL(path);
+			URLConnection connection=url.openConnection();
+			connection.connect();
+			InputStream inputStream=connection.getInputStream();
+			return inputStream;
+		}catch(Exception ex){
+			throw new ReportException(ex);
+		}
+	}
+
+	@Override
+	public boolean support(String path) {
+		return path.startsWith("http:");
+	}
+
+}

ureport2-core/src/main/resources/ureport-core-context.xml

@@ -30,6 +30,8 @@
 		<property name="disabled" value="${ureport.disableFileProvider}"></property>
 	</bean>
 	
+	<bean id="ureport.httpImageProvider" class="com.bstek.ureport.provider.image.HttpImageProvider"></bean>
+	
 	<bean id="ureport.reportBuilder" class="com.bstek.ureport.build.ReportBuilder">
 		<property name="hideRowColumnBuilder" ref="ureport.hideRowColumnBuilder"></property>
 	</bean>