利用JDT 回分析java 源代码

利用JDT 来分析java 源代码

项目里需要扫代码的sql，主要是想找出所有用到的sql。将相关的sql 提交给DBA 来分析，希望在最早的时间发现潜在的查询性能问题。

想想eclipse 里面用到的JDT 能分析java 源代码，如果我们能分析项目里的源代码利用ASTParser 就可以找到相关的SQL 定义了。

其实已经有人想到这个 http://www.programcreek.com/2011/01/a-complete-standalone-example-of-astparser

,已经自己整理过所有会依赖的jar，机器重装本地的 repository给丢了。所有就直接用这个链接里面给的一个zip 包，但是在我现在用到的eclipse 还需要一个 org.eclipse.text_3.5.0.jar 。

为了这个代码不要弄丢了，直接放一份当然没有项目里面的信息

package com.bwang.jdt;


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.ASTParser;
import org.eclipse.jdt.core.dom.AbstractTypeDeclaration;
import org.eclipse.jdt.core.dom.BodyDeclaration;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jdt.core.dom.FieldDeclaration;

public class SqlExtractor {
	private BufferedWriter writer;
	private long counter = 0;
	private final String fileRoot;
	private final String logFileName;

	public static void main (String[] args) {
		if (args.length < 2) {
			System.out.println("Please provide the parameters:");
			System.out.println("SqlExtractor  codeOfRoot logFileName");
			System.exit(-1);
		}
		SqlExtractor sqlExtractor = new SqlExtractor(args);
		sqlExtractor.extractSql();
	}

	SqlExtractor(String[] args) {
		fileRoot = args[0];
		logFileName =  args[1];

		try {
			writer = new BufferedWriter(new FileWriter(new File(logFileName)));
		} catch(IOException e) {

		}
	}

	private void analyzeOneFile(String sourceFile,  Writer writer) {
		String source = getFileContent(sourceFile);
		ASTParser parser = ASTParser.newParser(AST.JLS3);
		parser.setSource(source.toCharArray());
		CompilationUnit unit = (CompilationUnit)parser.createAST(null);
		unit.recordModifications();
		StringBuilder sb = new StringBuilder();
		List<AbstractTypeDeclaration> types = unit.types();
		for (AbstractTypeDeclaration type : types) {
			if (type.getNodeType() == ASTNode.TYPE_DECLARATION) {
				// Class def found
				List<BodyDeclaration> bodies = type.bodyDeclarations();
				for (BodyDeclaration body : bodies) {
					if (body.getNodeType() == ASTNode.FIELD_DECLARATION /*&& 
	                		((FieldDeclaration)body).getType().equals(Type.S) */	) {
						FieldDeclaration field = (FieldDeclaration)body;
						if(field.toString().toLowerCase().indexOf("select") >=0) {
							sb.append(field.toString());
							counter++;
						}
					}
				}
			}
		}
		if (sb.length() > 0) {

			try {
				if (counter > 0) {
					writer.append("\n\n");
				}
				sourceFile = sourceFile.replace(fileRoot, "");
				sourceFile = sourceFile.replace("\\", "/");
				writer.append(sourceFile + "\n");
				String content = sb.toString();
				content = content.replace("\" +", "\"\n\t\t+ ");
				content = content.replace("\"+", "\"\n\t\t+ ");
				writer.append(content);
			}catch(IOException ioe) {

			}
		}

	}

	private void extractSql() {
		File folder = new File(fileRoot);
		List<File> poms = new ArrayList<File>();
		handleOneFolder(folder, poms);

		System.out.println("begin to analyze files of :" + poms.size());
		try {
			int index = 1;
			for(File f : poms) {

				System.out.println("begin to analyze file : " + index + " " + f.getName());
				analyzeOneFile(f.getPath(), writer);
				index++;
			}
		}
		finally {
			try {
				writer.flush();
				writer.close();
			} catch(IOException e) {

			}
		}
		System.out.println("successfully find sql count:" + counter);
	}

	private void handleOneFolder(File folder,  List<File>  poms) {
		if(!folder.isDirectory()) {
			return;
		}

		String[] files = folder.list();
		for(String oneFile : files) {
			String fullFileName = folder.getPath() + "/" + oneFile;
			if (fullFileName.endsWith(".java") && fullFileName.indexOf("src\\test\\java\\") < 0) {
				poms.add(new File(fullFileName));
				continue;
			} 
			File f = new File(fullFileName);
			if (f.isDirectory()) {
				handleOneFolder(f, poms);
			}
		}
	}

	private String getFileContent(String fName) {
		try {	
			File file = new File(fName);
			BufferedReader in = new BufferedReader(new FileReader(file));
			StringBuffer buffer = new StringBuffer(); 
			String line = null;
			while (null != (line = in.readLine())) {
				buffer.append("\t" + line);
				buffer.append("\n");
			}	

			return buffer.toString();

		}
		catch (IOException e) {
			throw new RuntimeException(e);
		}
	}
}

思路也简单就是遍历 codeOfRoot 下面的所有java 文件，找到所有的field 定义的值里面包含 select 关键字的 field，然后将所有这些满足条件的都写到一个log 文件。

到时候将log 文件发给DBA 就行了。当然还可以更进一步来个CI，可以定期去扫项目的代码，然后比较产生的log 文件的变化。然后DBA 定期看变化的SQL 就好了，是不是很酷。

利用JDT 回分析java 源代码

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