跟Maven一样流行的Gradle，构建Java项目实战

落日映苍穹つ 2022-10-10 04:51 85阅读 0赞

**目录**

1.Gradle是什么？

1.1Gradle功能

1.2gradle提供了什么

2.Gradle与Maven区别

3.项目实战

3.1.项目介绍

3.2.build.gradle配置

3.3.核心代码

--------------------

# 1.Gradle是什么？ #

Gradle是一个基于JVM的构建工具，是一款通用灵活的构建工具，支持maven， Ivy仓库，支持传递性依赖管理，而不需要远程仓库或者是pom.xml和ivy.xml配置文件，基于Groovy，build脚本使用Groovy编写。

## 1.1Gradle**功能** ##

Ø gradle对多工程的构建支持很出色，工程依赖是gradle的第一功能。

Ø gradle支持局部构建。

Ø 支持多方式依赖管理：包括从[maven][]远程仓库、[nexus][]私服、ivy仓库以及本地文件系统的jars或者dirs

Ø gradle是第一个构建集成工具，与ant、maven、ivy有良好的相容相关性。

Ø 轻松迁移：gradle适用于任何结构的工程，你可以在同一个开发平台平行构建原工程和gradle工程。通常要求写相关测试，以保证开发的插件的相似性，这种迁移可以减少破坏性，尽可能的可靠。这也是重构的最佳实践。

Ø gradle的整体设计是以作为一种语言为导向的，而非成为一个严格死板的框架。

Ø 免费开源

## **1.2gradle提供了什么** ##

1. 一种可切换的，像maven一样的基于约定的构建框架，却又从不锁住你（约定优于配置）

2. 强大的支持多工程的构建

3. 强大的依赖管理（基于Apache Ivy），提供最大的便利去构建你的工程

4. 全力支持已有的Maven或者Ivy仓库基础建设

5. 支持传递性依赖管理，在不需要远程仓库和pom.xml和ivy配置文件的前提下

6. 基于groovy脚本构建，其build脚本使用[groovy][]语言编写

7. 具有广泛的领域模型支持你的构建

# 2.Gradle与Maven区别 #

Gradle和Maven都是项目自动构建工具，编译源代码只是整个过程的一个方面，更重要的是，你要把你的软件发布到生产环境中来产生商业价值，所以，你要运行测试，构建分布、分析代码质量、甚至为不同目标环境提供不同版本，然后部署。  
  
虽然两者都是项目工具，但是maven现在已经是行业标准，Gradle是后起之秀，很多人对他的了解都是从android studio中得到的，Gradle抛弃了Maven的基于XML的繁琐配置，众所周知XML的阅读体验比较差，对于机器来说虽然容易识别，但毕竟是由人去维护的。取而代之的是Gradle采用了领域特定语言Groovy的配置，大大简化了构建代码的行数，比如在Maven中你要引入一个依赖：

<properties>
            <kaptcha.version>2.3</kaptcha.version>
        </properties>
    <dependencies>
            <dependency>
                <groupId>com.google.code.kaptcha</groupId>
                <artifactId>kaptcha</artifactId>
                <version>${kaptcha.version}</version>
                <classifier>jdk15</classifier>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
            </dependency>
        </dependencies>

然后我将其转换成Gradle脚本，结果是惊人的：

dependencies {
        compile('org.springframework:spring-core:2.5.6')
        compile('org.springframework:spring-beans:2.5.6')
        compile('org.springframework:spring-context:2.5.6')
        compile('com.google.code.kaptcha:kaptcha:2.3:jdk15')
        testCompile('junit:junit:4.7')
    }

注意，配置从原来的28行缩减至7行！  
  
**Gradle两大特点**：

一是简洁，基于Groovy的紧凑脚本实在让人爱不释手，在表述意图方面也没有什么不清晰的地方二是灵活，各种在Maven中难以下手的事情，在Gradle就是小菜一碟，比如修改现有的构建生命周期，几行配置就完成了。

# 3.项目实战 #

## 3.1.项目介绍 ##

基于Java，使用Gradle构建一个抓取百度地图中的数据客户端，功能如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pscV9kaWxpZ2VuY2U_size_16_color_FFFFFF_t_70][]

## 3.2.build.gradle配置 ##

>     group 'com.example'
>     version '1.0-SNAPSHOT'
>     
>     apply plugin: 'java'
>     
>     sourceCompatibility = 1.8
>     
>     repositories {
>         mavenCentral()
>     }
>     
>     dependencies {
>         compile group: 'javax.servlet', name: 'javax.servlet-api', version: '3.1.0';
>         compile group: 'com.google.code.gson', name: 'gson', version: '2.8.5';
>         compile group: 'org.apache.poi', name: 'poi', version: '3.9';
>         compile group: 'org.apache.poi', name: 'poi-excelant', version: '3.9';
>         compile group: 'org.apache.poi', name: 'poi-scratchpad', version: '3.9';
>         compile group: 'junit', name: 'junit', version: '4.12';
>         testCompile group: 'junit', name: 'junit', version: '4.12'
>     }

## 3.3.核心代码 ##

GrabBaiduData.java内容为：

public class GrabBaiduData extends Thread implements ActionListener, WindowListener {
        String[] provinces = {"北京", "上海", "天津", "重庆", "河北", "山西", "内蒙古", "辽宁", "吉林", "黑龙江", "江苏", "浙江", "安徽", "福建", "江西", "山东", "河南", "湖北", "湖南", "广东", "广西", "海南", "四川", "贵州", "云南", "西藏", "陕西", "甘肃", "宁夏", "青海", "新疆", "香港", "澳门", "台湾"};
        String[][] citys = {
                {"东城区", "西城区", "崇文区", "宣武区", "朝阳区", "丰台区", "石景山区", "海淀区", "门头沟区", "房山区", "通州区", "顺义区", "昌平区", "大兴区", "怀柔区", "平谷区", "密云县", "延庆县"},
                {"黄浦区", "卢湾区", "徐汇区", "长宁区", "静安区", "普陀区", "虹口区", "杨浦区", "闵行区", "宝山区", "嘉定区", "浦东新区", "金山区", "松江区", "青浦区", "南汇区", "奉贤区", "崇明县"},
                {"和平区", "河东区", "河西区", "南开区", "河北区", "红桥区", "塘沽区", "汉沽区", "大港区", "东丽区", "西青区", "津南区", "北辰区", "武清区", "宝坻区", "宁河县", "静海县", "蓟县"},
                {"万州区", "涪陵区", "渝中区", "大渡口区", "江北区", "沙坪坝区", "九龙坡区", "南岸区", "北碚区", "万盛区", "双桥区", "渝北区", "巴南区", "黔江区", "长寿区", "綦江县", "潼南县", "铜梁县", "大足县", "荣昌县", "璧山县", "梁平县", "城口县", "丰都县", "垫江县", "武隆县", "忠县", "开县", "云阳县", "奉节县", "巫山县", "巫溪县", "石柱土家族自治县", "秀山土家族苗族自治县", "酉阳土家族苗族自治县", "彭水苗族土家族自治县", "江津市", "合川市", "永川市", "南川市"},
                {"石家庄市", "张家口市", "承德市", "秦皇岛市", "唐山市", "廊坊市", "保定市", "衡水市", "沧州市", "邢台市", "邯郸市"},
                {"太原市", "朔州市", "大同市", "阳泉市", "长治市", "晋城市", "忻州市", "晋中市", "临汾市", "吕梁市", "运城市"},
                {"呼和浩特市", "包头市", "乌海市", "赤峰市", "通辽市", "呼伦贝尔市", "鄂尔多斯市", "乌兰察布市", "巴彦淖尔市", "兴安盟", "锡林郭勒盟", "阿拉善盟"},
                {"沈阳市", "朝阳市", "阜新市", "铁岭市", "抚顺市", "本溪市", "辽阳市", "鞍山市", "丹东市", "大连市", "营口市", "盘锦市", "锦州市", "葫芦岛市"},
                {"长春市", "白城市", "松原市", "吉林市", "四平市", "辽源市", "通化市", "白山市", "延边州"},
                {"哈尔滨市", "齐齐哈尔市", "七台河市", "黑河市", "大庆市", "鹤岗市", "伊春市", "佳木斯市", "双鸭山市", "鸡西市", "牡丹江市", "绥化市", "大兴安岭地区"},
                {"南京市", "徐州市", "连云港市", "宿迁市", "淮安市", "盐城市", "扬州市", "泰州市", "南通市", "镇江市", "常州市", "无锡市", "苏州市"},
                {"杭州市", "湖州市", "嘉兴市", "舟山市", "宁波市", "绍兴市", "衢州市", "金华市", "台州市", "温州市", "丽水市"},
                {"合肥市", "宿州市", "淮北市", "亳州市", "阜阳市", "蚌埠市", "淮南市", "滁州市", "马鞍山市", "芜湖市", "铜陵市", "安庆市", "黄山市", "六安市", "巢湖市", "池州市", "宣城市"},
                {"福州市", "南平市", "莆田市", "三明市", "泉州市", "厦门市", "漳州市", "龙岩市", "宁德市"},
                {"南昌市", "九江市", "景德镇市", "鹰潭市", "新余市", "萍乡市", "赣州市", "上饶市", "抚州市", "宜春市", "吉安市"},
                {"济南市", "青岛市", "聊城市", "德州市", "东营市", "淄博市", "潍坊市", "烟台市", "威海市", "日照市", "临沂市", "枣庄市", "济宁市", "泰安市", "莱芜市", "滨州市", "菏泽市"},
                {"郑州市", "开封市", "三门峡市", "洛阳市", "焦作市", "新乡市", "鹤壁市", "安阳市", "濮阳市", "商丘市", "许昌市", "漯河市", "平顶山市", "南阳市", "信阳市", "周口市", "驻马店市", "济源市"},
                {"武汉市", "十堰市", "襄樊市", "荆门市", "孝感市", "黄冈市", "鄂州市", "黄石市", "咸宁市", "荆州市", "宜昌市", "随州市", "省直辖县级行政单位", "恩施州"},
                {"长沙市", "张家界市", "常德市", "益阳市", "岳阳市", "株洲市", "湘潭市", "衡阳市", "郴州市", "永州市", "邵阳市", "怀化市", "娄底市", "湘西州"},
                {"广州市", "深圳市", "清远市", "韶关市", "河源市", "梅州市", "潮州市", "汕头市", "揭阳市", "汕尾市", "惠州市", "东莞市", "珠海市", "中山市", "江门市", "佛山市", "肇庆市", "云浮市", "阳江市", "茂名市", "湛江市"},
                {"南宁市", "桂林市", "柳州市", "梧州市", "贵港市", "玉林市", "钦州市", "北海市", "防城港市", "崇左市", "百色市", "河池市", "来宾市", "贺州市"},
                {"海口市", "三亚市", "省直辖县级行政单位"},
                {"成都市", "广元市", "绵阳市", "德阳市", "南充市", "广安市", "遂宁市", "内江市", "乐山市", "自贡市", "泸州市", "宜宾市", "攀枝花市", "巴中市", "达州市", "资阳市", "眉山市", "雅安市", "阿坝州", "甘孜州", "凉山州"},
                {"贵阳市", "六盘水市", "遵义市", "安顺市", "毕节地区", "铜仁地区", "黔东南州", "黔南州", "黔西南州"},
                {"昆明市", "曲靖市", "玉溪市", "保山市", "昭通市", "丽江市", "思茅市", "临沧市", "德宏州", "怒江州", "迪庆州", "大理州", "楚雄州", "红河州", "文山州", "西双版纳州"},
                {"拉萨市", "那曲地区", "昌都地区", "林芝地区", "山南地区", "日喀则地区", "阿里地区"},
                {"西安市", "延安市", "铜川市", "渭南市", "咸阳市", "宝鸡市", "汉中市", "榆林市", "安康市", "商洛市"},
                {"兰州市", "嘉峪关市", "白银市", "天水市", "武威市", "酒泉市", "张掖市", "庆阳市", "平凉市", "定西市", "陇南市", "临夏州", "甘南州"},
                {"西宁市", "海东地区", "海北州", "海南州", "黄南州", "果洛州", "玉树州", "海西州"},
                {"银川市", "石嘴山市", "吴忠市", "固原市", "中卫市"},
                {"乌鲁木齐市", "克拉玛依市", "自治区直辖县级行政单位", "喀什地区", "阿克苏地区", "和田地区", "吐鲁番地区", "哈密地区", "克孜勒苏柯州", "博尔塔拉州", "昌吉州", "巴音郭楞州", "伊犁州", "塔城地区", "阿勒泰地区"},
                {"香港"},
                {"澳门"},
                {"台北市", "高雄市", "台中市", "花莲市", "基隆市", "嘉义市", "金门市", "连江市", "苗栗市", "南投市", "澎湖市", "屏东市", "台东市", "台南市", "桃园市", "新竹市", "宜兰市", "云林市", "彰化市"}};
    
    
        private JTextField textField1;
        private JComboBox comboBox1;
        private JCheckBox provinceCheckBox;
        private JCheckBox infoCheckBox;
        private JCheckBox mobileCheckBox;
        private JButton exportButton;
        private JPanel jpaneltitle;
        private JCheckBox searchkeyCheckBox;
        private JLabel selectprovince;
        private JLabel exportfield;
        private JLabel searchcontent;
    
        public void run() {
            Dimension screensize = Toolkit.getDefaultToolkit().getScreenSize();
            double Width = screensize.getWidth();
            double Height = screensize.getHeight();
            JFrame frame = new JFrame("百度地图数据抓取工具");
            // GrabBaiduData data=new GrabBaiduData();
            //设置大小
            frame.setSize(500, 300);
            //窗体位置
            frame.setLocation((int) ((Width - 500) / 2), (int) ((Height - 300) / 2));
            frame.setContentPane(jpaneltitle);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.pack();
            frame.setVisible(true);
            for (String province : provinces) {
                comboBox1.addItem(province);
            }
            exportButton.addActionListener(this);
        }
    
        @Override
        public void actionPerformed(ActionEvent actionEvent) {
            //System.out.println("//"+actionEvent.getSource());
            if (actionEvent.getSource() == exportButton) {
                exportButton.setText("导出中……");
                exportButton.setEnabled(false);
                try {
                    String keyValue = textField1.getText();
                    if (keyValue == null || "".equals(keyValue.trim())) {
                        JOptionPane.showMessageDialog(null, "查询内容不能为空！");
                        exportButton.setText("导出");
                        exportButton.setEnabled(true);
                        return;
                    }
                    String privince = (String) comboBox1.getSelectedItem();
                    Integer privinceIndex = (Integer) comboBox1.getSelectedIndex();
                    boolean priviceData = provinceCheckBox.isSelected();
                    boolean infoData = infoCheckBox.isSelected();
                    boolean mobileData = mobileCheckBox.isSelected();
                    boolean nameData = searchkeyCheckBox.isSelected();
    //                System.out.println(new Gson().toJson(citys[privinceIndex]));
    //                System.out.println(keyValue+"//"+privince+"//"+priviceData+"//"+infoData+"//"+mobileData);
                    BaiduMapAPI baiduMapAPI = new BaiduMapAPI(priviceData, infoData, mobileData, nameData);
    
                    baiduMapAPI.getArea(keyValue, citys[privinceIndex]);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                JOptionPane.showMessageDialog(null, "导出完成！文件目录：" + BaiduMapAPI.saveFile);
                exportButton.setText("导出");
                exportButton.setEnabled(true);
            }
    
        }
    
    
        @Override
        public void windowOpened(WindowEvent windowEvent) {
    
        }
    
        @Override
        public void windowClosing(WindowEvent windowEvent) {
            System.exit(0);
    
        }
    
        @Override
        public void windowClosed(WindowEvent windowEvent) {
            System.exit(0);
    
        }
    
        @Override
        public void windowIconified(WindowEvent windowEvent) {
    
        }
    
        @Override
        public void windowDeiconified(WindowEvent windowEvent) {
    
        }
    
        @Override
        public void windowActivated(WindowEvent windowEvent) {
    
        }
    
        @Override
        public void windowDeactivated(WindowEvent windowEvent) {
    
        }
    
        {
    // GUI initializer generated by IntelliJ IDEA GUI Designer
    // >>> IMPORTANT!! <<<
    // DO NOT EDIT OR ADD ANY CODE HERE!
            $$$setupUI$$$();
        }
    
        /**
         * Method generated by IntelliJ IDEA GUI Designer
         * >>> IMPORTANT!! <<<
         * DO NOT edit this method OR call it in your code!
         *
         * @noinspection ALL
         */
        private void $$$setupUI$$$() {
            jpaneltitle = new JPanel();
            jpaneltitle.setLayout(new com.intellij.uiDesigner.core.GridLayoutManager(5, 6, new Insets(30, 30, 30, 30), -1, -1));
            jpaneltitle.setToolTipText("百度地图数据抓取工具");
            jpaneltitle.setBorder(BorderFactory.createTitledBorder(""));
            final com.intellij.uiDesigner.core.Spacer spacer1 = new com.intellij.uiDesigner.core.Spacer();
            jpaneltitle.add(spacer1, new com.intellij.uiDesigner.core.GridConstraints(2, 0, 3, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_CENTER, com.intellij.uiDesigner.core.GridConstraints.FILL_VERTICAL, 1, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_WANT_GROW, null, null, null, 0, false));
            searchcontent = new JLabel();
            searchcontent.setText("查询内容：");
            jpaneltitle.add(searchcontent, new com.intellij.uiDesigner.core.GridConstraints(1, 1, 1, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_WEST, com.intellij.uiDesigner.core.GridConstraints.FILL_NONE, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
            comboBox1 = new JComboBox();
            final DefaultComboBoxModel defaultComboBoxModel1 = new DefaultComboBoxModel();
            comboBox1.setModel(defaultComboBoxModel1);
            jpaneltitle.add(comboBox1, new com.intellij.uiDesigner.core.GridConstraints(2, 2, 1, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_NORTHWEST, com.intellij.uiDesigner.core.GridConstraints.FILL_HORIZONTAL, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_GROW, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, new Dimension(52, 28), null, 0, false));
            provinceCheckBox = new JCheckBox();
            provinceCheckBox.setSelected(true);
            provinceCheckBox.setText("省市");
            jpaneltitle.add(provinceCheckBox, new com.intellij.uiDesigner.core.GridConstraints(3, 2, 1, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_WEST, com.intellij.uiDesigner.core.GridConstraints.FILL_NONE, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_SHRINK | com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_GROW, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
            infoCheckBox = new JCheckBox();
            infoCheckBox.setSelected(true);
            infoCheckBox.setText("详细地址");
            jpaneltitle.add(infoCheckBox, new com.intellij.uiDesigner.core.GridConstraints(3, 3, 1, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_WEST, com.intellij.uiDesigner.core.GridConstraints.FILL_NONE, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_SHRINK | com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_GROW, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
            mobileCheckBox = new JCheckBox();
            mobileCheckBox.setSelected(true);
            mobileCheckBox.setText("联系方式");
            jpaneltitle.add(mobileCheckBox, new com.intellij.uiDesigner.core.GridConstraints(3, 4, 1, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_WEST, com.intellij.uiDesigner.core.GridConstraints.FILL_NONE, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_SHRINK | com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_GROW, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
            exportButton = new JButton();
            exportButton.setText("导出");
            jpaneltitle.add(exportButton, new com.intellij.uiDesigner.core.GridConstraints(4, 4, 1, 2, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_CENTER, com.intellij.uiDesigner.core.GridConstraints.FILL_HORIZONTAL, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_SHRINK | com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_GROW, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
            selectprovince = new JLabel();
            selectprovince.setText("选择省份：");
            jpaneltitle.add(selectprovince, new com.intellij.uiDesigner.core.GridConstraints(2, 1, 1, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_WEST, com.intellij.uiDesigner.core.GridConstraints.FILL_NONE, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
            exportfield = new JLabel();
            exportfield.setText("导出字段：");
            jpaneltitle.add(exportfield, new com.intellij.uiDesigner.core.GridConstraints(3, 1, 1, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_WEST, com.intellij.uiDesigner.core.GridConstraints.FILL_NONE, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
            textField1 = new JTextField();
            jpaneltitle.add(textField1, new com.intellij.uiDesigner.core.GridConstraints(1, 2, 1, 4, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_WEST, com.intellij.uiDesigner.core.GridConstraints.FILL_HORIZONTAL, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_WANT_GROW, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, new Dimension(150, -1), null, 0, false));
            searchkeyCheckBox = new JCheckBox();
            searchkeyCheckBox.setSelected(true);
            searchkeyCheckBox.setText("查询名称");
            jpaneltitle.add(searchkeyCheckBox, new com.intellij.uiDesigner.core.GridConstraints(3, 5, 1, 1, com.intellij.uiDesigner.core.GridConstraints.ANCHOR_WEST, com.intellij.uiDesigner.core.GridConstraints.FILL_NONE, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_SHRINK | com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_CAN_GROW, com.intellij.uiDesigner.core.GridConstraints.SIZEPOLICY_FIXED, null, null, null, 0, false));
        }
    
        /**
         * @noinspection ALL
         */
        public JComponent $$$getRootComponent$$$() {
            return jpaneltitle;
        }
    }

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[maven]: https://baike.baidu.com/item/maven
[nexus]: https://baike.baidu.com/item/nexus
[groovy]: https://baike.baidu.com/item/groovy
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