通过JAVA代码对pom.xml文件进行dependency的增加与删除操作

通过java代码对pom.xml文件进行操作，首先需要引入jar包：

<!--pom.xml文件解析--> <dependency> <groupId>org.apache.maven</groupId> <artifactId>maven-model</artifactId> <version>3.6.0</version> </dependency>

1.对xml文件进行增加操作：

代码中的key为：maven-model

Value为：

<dependency> <groupId>org.apache.maven</groupId> <artifactId>maven-model</artifactId> <version>3.6.0</version> </dependency>

/**
 * xml中添加组件
 * @param url 路径
 * @param paramKey 组件key
 * @param paramValue 组件value
 * @return
 */
@Override
public boolean addXml(String url, String paramKey, String paramValue) {
    MavenXpp3Reader reader = new MavenXpp3Reader();
    String pomUrl = url+"\\pom.xml";

    String groupId = "";
    String artifactId = "";
    String version = "";

    //groupId
    String groupRgex = "<groupId>(.*?)</groupId>"; groupId = getParam(paramValue, groupRgex); //artifactId String artifactRgex = "<artifactId>(.*?)</artifactId>"; artifactId = getParam(paramValue, artifactRgex); //version String versionRgex = "<version>(.*?)</version>"; version = getParam(paramValue, versionRgex); try { FileInputStream fis = new FileInputStream(new File(pomUrl)); Model model = reader.read(fis); List<Dependency> dependencies = model.getDependencies(); Dependency addDependency = new Dependency(); addDependency.setGroupId(groupId); addDependency.setArtifactId(artifactId); addDependency.setVersion(version); dependencies.add(addDependency); model.setDependencies(dependencies); MavenXpp3Writer mavenXpp3Writer = new MavenXpp3Writer(); mavenXpp3Writer.write(new FileWriter(pomUrl),model); } catch (IOException e) { e.printStackTrace(); } catch (XmlPullParserException e) { e.printStackTrace(); } return true; }

/**
 * @description 获取匹配模式的正则
 * @param param 参数
 * @param rgex 正则表达式
 * @return
 */
private String getParam(String param, String rgex) {
    Pattern groupPattern = Pattern.compile(rgex);// 匹配的模式
    Matcher group = groupPattern.matcher(param);
    String id = "";
    while(group.find()){
        id = group.group(1);
    }
    return id;
}

注意：有的<dependency>中不只含有groupId、artifactId、version，需要进行具体分析

2.对xml文件进行删除操作：

/**
 * 删除xml中依赖
 * @param url 路径
 * @param paramKey 组件key
 * @param paramValue 组件value
 * @return
 */
@Override
public boolean deleteXml(String url, String paramKey, String paramValue) {
    MavenXpp3Reader reader = new MavenXpp3Reader();
    String pomUrl = url+"\\pom.xml";

    try {
        FileInputStream fis = new FileInputStream(new File(pomUrl));
        Model model = reader.read(fis);
        List<Dependency> dependencies = model.getDependencies(); for (Dependency dependency:dependencies) { String artifactId = dependency.getArtifactId(); if(artifactId.equals(paramKey)){ dependencies.remove(dependency); break; } } MavenXpp3Writer mavenXpp3Writer = new MavenXpp3Writer(); mavenXpp3Writer.write(new FileWriter(pomUrl),model); } catch (IOException e) { e.printStackTrace(); } catch (XmlPullParserException e) { e.printStackTrace(); } return true; }