add one param to set charset when read Properties file

src/main/java/org/jenkinsci/plugins/pipeline/utility/steps/conf/ReadPropertiesStep.java

@@ -43,6 +43,7 @@
 public class ReadPropertiesStep extends AbstractFileOrTextStep {
     private Map<Object, Object> defaults;
     private boolean interpolate;
+    private String charset;
 
     @DataBoundConstructor
     public ReadPropertiesStep() {
@@ -93,6 +94,19 @@ public void setInterpolate(Boolean interpolate) {
         this.interpolate = interpolate;
     }
 
+    public String getCharset() {
+        return charset;
+    }
+
+    /**
+     * The charset encoding to use when read the properties file. Defaults to ISO 8859-1 .
+     * @param charset the charset
+     */
+    @DataBoundSetter
+    public void setCharset(String charset) {
+        this.charset = charset;
+    }
+
     @Extension
     public static class DescriptorImpl extends AbstractFileOrTextStepDescriptorImpl {
         public DescriptorImpl() {

src/main/java/org/jenkinsci/plugins/pipeline/utility/steps/conf/ReadPropertiesStepExecution.java

@@ -42,6 +42,8 @@
 import java.io.InputStream;
 import java.io.PrintStream;
 import java.io.StringReader;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Properties;
@@ -84,7 +86,13 @@ protected Map<String, Object> doRun() throws Exception {
             FilePath f = ws.child(step.getFile());
             if (f.exists() && !f.isDirectory()) {
                 try(InputStream is = f.read()){
-                   properties.load(is);
+                    if (StringUtils.isEmpty(step.getCharset())) {
+                        properties.load(is);
+                    } else {
+                        try (InputStreamReader isr = new InputStreamReader(is, step.getCharset()); BufferedReader br = new BufferedReader(isr)) {
+                            properties.load(br);
+                        }
+                    }
                 }
             } else if (f.isDirectory()) {
                 logger.print("warning: ");

src/main/resources/org/jenkinsci/plugins/pipeline/utility/steps/conf/ReadPropertiesStep/config.jelly

@@ -24,7 +24,16 @@
   -->
 <?jelly escape-by-default='true'?>
 <j:jelly xmlns:j="jelly:core" xmlns:f="/lib/form">
-    <f:block>
-        <p>This is a special step. No snippet generation available. See inline help for more information.</p>
-    </f:block>
+    <f:entry title="${%file.title}" field="file" description="${%file.description}">
+        <f:textbox />
+    </f:entry>
+    <f:entry title="${%text.title}" field="text" description="${%text.description}">
+        <f:textbox />
+    </f:entry>
+    <f:entry title="${%interpolate.title}" field="interpolate" description="${%interpolate.description}">
+        <f:checkbox />
+    </f:entry>
+    <f:entry title="${%charset.title}" field="charset" description="${%charset.description}">
+        <f:textbox />
+    </f:entry>
 </j:jelly>

src/main/resources/org/jenkinsci/plugins/pipeline/utility/steps/conf/ReadPropertiesStep/config.properties

@@ -0,0 +1,8 @@
+file.title=File
+file.description=(Optional) path to a file in the workspace to read the properties from
+text.title=Text
+text.description=An Optional String containing properties formatted data
+interpolate.title=Interpolate
+interpolate.description=Flag to indicate if the properties should be interpolated or not.
+charset.title=Charset
+charset.description=(Optional) What charset to use when read the properties file. Default is empty, then will use jvm ISO 8859-1.

src/main/resources/org/jenkinsci/plugins/pipeline/utility/steps/conf/ReadPropertiesStep/help.html

@@ -59,6 +59,10 @@
 
         In case of error or cyclic dependencies, the original properties will be returned.
     </li>
+    <li>
+        <code>charset</code>:
+        What charset to use when read properties file. Default is empty, then will use jvm ISO 8859-1.
+    </li>
 </ul>
 <p>
     <strong>Example:</strong><br/>
@@ -82,4 +86,10 @@
         assert props.fullUrl = 'http://localhost/README.txt'
         </pre>
     </code>
+    <strong>Example with charset:</strong>
+    <code>
+        <pre>
+        def props = readProperties charset: 'UTF-8', file: 'test.properties'
+        </pre>
+    </code>
 </p>

src/test/java/org/jenkinsci/plugins/pipeline/utility/steps/conf/ReadPropertiesStepTest.java

@@ -114,6 +114,30 @@ public void readFileWithDefaults() throws Exception {
         j.assertBuildStatusSuccess(p.scheduleBuild2(0));
     }
 
+    @Test
+    public void readFileWithCharset() throws Exception {
+        Properties props = new Properties();
+        props.setProperty("test", "One");
+        props.setProperty("another", "Two");
+        props.setProperty("zh", "中文");
+        File file = temp.newFile();
+        try (FileWriter f = new FileWriter(file)) {
+            props.store(f, "Pipeline test");
+        }
+
+        WorkflowJob p = j.jenkins.createProject(WorkflowJob.class, "p");
+        p.setDefinition(new CpsFlowDefinition(
+                "node('slaves') {\n" +
+                        "  def props = readProperties charset: 'utf-8', file: '" + separatorsToSystemEscaped(file.getAbsolutePath()) + "'\n" +
+                        "  assert props['test'] == 'One'\n" +
+                        "  assert props['another'] == 'Two'\n" +
+                        "  assert props.test == 'One'\n" +
+                        "  assert props.another == 'Two'\n" +
+                        "  assert props.zh == '中文' \n" +
+                        "}", true));
+        j.assertBuildStatusSuccess(p.scheduleBuild2(0));
+    }
+
     @Test
     public void readText() throws Exception {
         Properties props = new Properties();