diff --git a/binding/java/pom.xml b/binding/java/pom.xml
index 43fe239..3b6c492 100644
--- a/binding/java/pom.xml
+++ b/binding/java/pom.xml
@@ -112,6 +112,14 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 
diff --git a/binding/java/src/main/java/org/lionsoul/ip2region/SearchTest.java b/binding/java/src/main/java/org/lionsoul/ip2region/SearchTest.java
index 5c70266..8022cd4 100644
--- a/binding/java/src/main/java/org/lionsoul/ip2region/SearchTest.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/SearchTest.java
@@ -9,6 +9,7 @@ package org.lionsoul.ip2region;
 import org.lionsoul.ip2region.xdb.Searcher;
 
 import java.io.*;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.TimeUnit;
 
 public class SearchTest {
@@ -145,7 +146,8 @@ public class SearchTest {
         Searcher searcher = createSearcher(dbPath, cachePolicy);
         long count = 0, costs = 0, tStart = System.nanoTime();
         String line;
-        final BufferedReader reader = new BufferedReader(new FileReader(srcPath));
+        final FileInputStream fis = new FileInputStream(srcPath);
+        final BufferedReader reader = new BufferedReader(new InputStreamReader(fis, StandardCharsets.UTF_8));
         while ((line = reader.readLine()) != null) {
             String l = line.trim();
             String[] ps = l.split("\\|", 3);