diff --git a/org.jacoco.ant/src/org/jacoco/ant/ReportTask.java b/org.jacoco.ant/src/org/jacoco/ant/ReportTask.java
index 1416a5e1cfc5b62426170110f89390e56586ba81..07a4ff680488f31c1150efbaac94e5aae4fc3a16 100644
--- a/org.jacoco.ant/src/org/jacoco/ant/ReportTask.java
+++ b/org.jacoco.ant/src/org/jacoco/ant/ReportTask.java
@@ -53,6 +53,7 @@ import org.jacoco.report.check.RulesChecker;
 import org.jacoco.report.csv.CSVFormatter;
 import org.jacoco.report.html.HTMLFormatter;
 import org.jacoco.report.xml.XMLFormatter;
+import org.jacoco.core.internal.diff.JsonReadUtil;
 
 /**
  * Task for coverage report generation.
@@ -108,6 +109,12 @@ public class ReportTask extends Task {
 
 		private String name;
 
+		private String difffile;
+
+		public void setDifffile(final String difffile) {
+			this.difffile = difffile;
+		}
+
 		/**
 		 * Sets the name of the group.
 		 *
@@ -535,14 +542,21 @@ public class ReportTask extends Task {
 		return new MultiReportVisitor(visitors);
 	}
 
+	// 存放差量文件
+	private String diffFileString = "";
+
 	private void createReport(final IReportGroupVisitor visitor,
 			final GroupElement group) throws IOException {
 		if (group.name == null) {
 			throw new BuildException("Group name must be supplied",
 					getLocation());
 		}
+		if (null != group.difffile) {
+			diffFileString = group.difffile;
+			log("差量文件：" + JsonReadUtil.readJsonToString(group.difffile));
+		}
 		if (group.children.isEmpty()) {
-			final IBundleCoverage bundle = createBundle(group);
+			final IBundleCoverage bundle = createBundle(group, diffFileString);
 			final SourceFilesElement sourcefiles = group.sourcefiles;
 			final AntResourcesLocator locator = new AntResourcesLocator(
 					sourcefiles.encoding, sourcefiles.tabWidth);
@@ -560,9 +574,16 @@ public class ReportTask extends Task {
 		}
 	}
 
-	private IBundleCoverage createBundle(final GroupElement group)
+	private IBundleCoverage createBundle(final GroupElement group,
+										 String diffFileString)
 			throws IOException {
-		final CoverageBuilder builder = new CoverageBuilder();
+		final CoverageBuilder builder;
+		if (null != diffFileString && !"".equals(diffFileString)) {
+			builder = new CoverageBuilder(
+					JsonReadUtil.readJsonToString(diffFileString));
+		} else {
+			builder = new CoverageBuilder();
+		}
 		final Analyzer analyzer = new Analyzer(executionDataStore, builder);
 		for (final Iterator<?> i = group.classfiles.iterator(); i.hasNext();) {
 			final Resource resource = (Resource) i.next();