使用JDT转java代码为AST

maven依赖

<dependency>
    <groupId>org.eclipse.jdt</groupId>
    <artifactId>org.eclipse.jdt.core</artifactId>
    <version>3.13.0</version>
</dependency>

代码：

import org.apache.commons.io.FileUtils;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.ASTParser;
import org.eclipse.jdt.core.dom.CompilationUnit;

import java.io.File;
import java.util.Map;

import static org.eclipse.jdt.core.dom.AST.JLS8;

public class JdtTest {

    public static void main(String[] args) {
        ASTParser parser = ASTParser.newParser(AST.JLS8); //设置Java语言规范版本
        parser.setKind(ASTParser.K_COMPILATION_UNIT);

        parser.setCompilerOptions(null);
        parser.setResolveBindings(true);

        Map<String, String> compilerOptions = JavaCore.getOptions();
        compilerOptions.put(JavaCore.COMPILER_COMPLIANCE, JavaCore.VERSION_1_8); //设置Java语言版本
        compilerOptions.put(JavaCore.COMPILER_CODEGEN_TARGET_PLATFORM, JavaCore.VERSION_1_8);
        compilerOptions.put(JavaCore.COMPILER_SOURCE, JavaCore.VERSION_1_8);
        parser.setCompilerOptions(compilerOptions); //设置编译选项

        String src = null;
        try {
            src = FileUtils.readFileToString(new File("LoginController.java"),"UTF-8");  //要解析的文件
        } catch (Exception e) {
            e.printStackTrace();
        }
        parser.setSource(src.toCharArray());
        CompilationUnit cu = (CompilationUnit) parser.createAST(null);  //下个断点可以看看cu的types成员就是整个语法树
        System.out.println(cu);  
    }
}