新增: properties 配置读取工具类方法

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
+         http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>space.caoshd</groupId>
+    <artifactId>otone</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>8.2.0</version>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>1.4.14</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

src/main/java/space/caoshd/otone/tool/PropertyTools.java

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+package space.caoshd.otone.tool;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+
+/**
+ * properties 加载类
+ */
+public class PropertyTools {
+
+    Map<String, String> propertyMap;
+
+    public PropertyTools(InputStream stream) {
+        propertyMap = loadProperties(stream);
+    }
+
+    public Map<String, String> loadProperties(InputStream stream) {
+        try {
+            Properties properties = new Properties();
+            properties.load(stream);
+            Map<String, String> result = new HashMap<>();
+            properties.forEach((k, v) -> result.put((String) k, (String) v));
+            return result;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public String getString(String key) {
+        return propertyMap.get(key);
+    }
+
+    public Integer getInt(String key) {
+        return Integer.valueOf(propertyMap.get(key));
+    }
+
+    public Long getLong(String key) {
+        return Long.valueOf(propertyMap.get(key));
+    }
+
+}

src/main/java/space/caoshd/otone/util/Constants.java

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+package space.caoshd.otone.util;
+
+public class Constants {
+    public Constants() {
+    }
+
+    public static final String DATASOURCE_PATH = "datasource.properties";
+
+    public static final String CONFIG_PATH = "config.properties";
+
+}

src/main/java/space/caoshd/otone/util/ResourceUtils.java

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+package space.caoshd.otone.util;
+
+import java.io.File;
+import java.io.InputStream;
+import java.net.URL;
+
+public class ResourceUtils {
+    public static InputStream getClassPathFileStream(String filename) {
+        return ResourceUtils.class.getClassLoader().getResourceAsStream(filename);
+    }
+
+    public static File getClassPathFile(String filename) {
+        URL resource = ResourceUtils.class.getClassLoader().getResource(filename);
+        assert resource != null;
+        return new File(resource.getFile());
+    }
+}

src/main/resources/datasource.properties

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+username=root
+password=123456
+url=jdbc:mysql://localhost:3306/otone?rewriteBatchedStatements=true&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
+driver-class-name=com.mysql.cj.jdbc.Driver

src/test/java/space/caoshd/otone/tool/PropertyToolsTest.java

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+package space.caoshd.otone.tool;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import space.caoshd.otone.util.Constants;
+import space.caoshd.otone.util.ResourceUtils;
+
+import java.io.*;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class PropertyToolsTest {
+
+    @Test
+    void loadProperties() {
+        InputStream fileStream = ResourceUtils.getClassPathFileStream(Constants.DATASOURCE_PATH);
+        PropertyTools propertyTools = new PropertyTools(fileStream);
+        Assertions.assertNotNull(propertyTools);
+    }
+
+    @Test
+    void getString() {
+    }
+
+    @Test
+    void getInt() {
+    }
+
+    @Test
+    void getLong() {
+    }
+}

src/test/java/space/caoshd/otone/util/ResourceUtilsTest.java

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+package space.caoshd.otone.util;
+
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+
+class ResourceUtilsTest {
+
+    @Test
+    void getClassPathFile() {
+        File file = ResourceUtils.getClassPathFile("datasource.properties");
+        System.out.println(file);
+    }
+
+    @Test
+    void getClassPathFileStream() {
+    }
+}

src/test/resources/datasource.properties

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+username=root
+password=123456
+url=jdbc:mysql://localhost:3306/otone?rewriteBatchedStatements=true&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
+driver-class-name=com.mysql.cj.jdbc.Driver