使用 javaparser 解析.java文件

淩亂°似流年 2022-10-16 08:49 782阅读 0赞

maven 依赖

<dependencies>
            <dependency>
                <groupId>com.github.javaparser</groupId>
                <artifactId>javaparser-symbol-solver-core</artifactId>
                <version>3.6.5</version>
            </dependency>
    
            <dependency>
                <groupId>com.github.javaparser</groupId>
                <artifactId>javaparser-core</artifactId>
                <version>3.6.5</version>
            </dependency>
        </dependencies>

public List<FieldsData> getFieldsDataList() {
            FileInputStream in = null;
            try {
                in = new FileInputStream(filePath);
                CompilationUnit cu = JavaParser.parse(in);
                String mainClass = cu.getType(0).getName().asString();
                NodeList<ImportDeclaration> imports = cu.getImports();
                if (imports != null) {
                    for (int i = 0; i < imports.size(); i++) {
                        importName.add(imports.get(i).getNameAsString());
                    }
                }
                //System.out.println("imports:" + importName);
                for (TypeDeclaration typeDec : cu.getTypes()) {
                    List<BodyDeclaration> members = typeDec.getMembers();
                    if (members != null) {
                        for (BodyDeclaration member : members) {
                            parserBodyDeclaration(cu.getType(0).getName().asString(), member);
                        }
                    }
                }
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } finally {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
    
            return fieldsDataList;
        }

public void parserBodyDeclaration(String className, BodyDeclaration member) {
    
            if (member instanceof FieldDeclaration) {
                FieldDeclaration field = (FieldDeclaration) member;
    
    //            NodeList annotations = member.getAnnotations();
    //            if (annotations != null && annotations.size() > 0) {
    //                System.out.println("annotations:" + annotations.get(0));//注解
    //            } else {
    //                System.out.println("annotations is empty");
    //            }
    
                // System.out.println("matamodel:" + member.getMetaModel()); //Core10000101In
                // System.out.println("comment:" + member.getComment().orElse(null)); 注释
                // System.out.println("class: " + className + ",name: " + field.getVariable(0).getName().asString() +
                // ",type:" + field.getElementType().asString());
    
                String elementType = field.getElementType().asString();
                for (int i = 0; i < importName.size(); i++) {
                    if (importName.get(i).endsWith(elementType)) {
                        elementType = importName.get(i);
                        break;
                    }
                }
    
                fieldsDataList.add(new FieldsData(field.getVariable(0).getName().asString(),
                        elementType, className));
            }
    
            if (member instanceof ClassOrInterfaceDeclaration) {
                ClassOrInterfaceDeclaration field = (ClassOrInterfaceDeclaration) member;
    //            NodeList<AnnotationExpr> annotations = field.getAnnotations();
    //            if (annotations != null && annotations.size() > 0) {
    //                System.out.println("class annotaions:" + annotations.get(0).getName());
    //            }
                SimpleName name = field.getName();
                String classNameNew = className + "." + name.asString();
                NodeList<BodyDeclaration<?>> members2 = field.getMembers();
                if (members2 == null) {
                    return;
                }
                for (BodyDeclaration item : members2) {
                    parserBodyDeclaration(classNameNew, item);
                }
            }
        }

public class FieldsData {
        private String name;
        private String typeName;
        private String className;
    
        public FieldsData(String name, String typeName, String className) {
            this.name = name;
            this.typeName = typeName;
            this.className = className;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getTypeName() {
            return typeName;
        }
    
        public void setTypeName(String typeName) {
            this.typeName = typeName;
        }
    
        public String getClassName() {
            return className;
        }
    
        public void setClassName(String className) {
            this.className = className;
        }
    
        @Override
        public String toString() {
            return "FieldsData{" +
                    "className='" + className + '\'' +
                    ", name='" + name + '\'' +
                    ", typeName='" + typeName + '\'' +
                    '}';
        }
    }