java代码 根据domain自动生成DAO层 小tool(功能有待又垒加)

   运行环境 XP MYECLIPSE8。5 JDK1。6。30


    根据提供domain 类， 自动生成其对应的DAO的 crud操作。

package com.wjj.domain;

public class User {
	private int id;
	
	private String username;
	
	private String password;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	
	
}

package com.wjj.generator;

import com.wjj.io.utils.IOUtil;

public class DAOGenerator {

	public static void Generate(Class clazz) throws Exception{
		StringBuilder sBuilder = new StringBuilder();
		sBuilder.append("package com.wjj.generated.dao;");
		sBuilder.append("\n");
		sBuilder.append("import " + clazz.getPackage().getName() + "."
				+ clazz.getSimpleName() + ";");
		sBuilder.append("\n");

		sBuilder.append("public class " + clazz.getSimpleName() + "DAO");
		sBuilder.append("\n");
		sBuilder.append("{");
		sBuilder.append("\n");
		GenerateInsert(clazz, sBuilder);
		GenerateDelete(clazz, sBuilder);
		GenerateUpdate(clazz, sBuilder);
		GenerateList(clazz, sBuilder);
		sBuilder.append("}");
		sBuilder.append("\n");

		IOUtil.writeStringFileToDesk(sBuilder.toString().getBytes(),clazz.getSimpleName()+"DAO");

		System.out.println("=====================");
		System.out.println(sBuilder.toString());
	}

	protected static void GenerateInsert(Class clazz, StringBuilder sBuilder) {
		sBuilder.append("public void Insert" + clazz.getSimpleName() + "("+clazz.getSimpleName()+ " " + clazz.getSimpleName().toLowerCase() +"){");
		sBuilder.append("\n");
		System.out
				.println(" you can append jdbc or hibernate or ibatis ... to here");
		sBuilder.append("}");
		sBuilder.append("\n");
	}

	protected static void GenerateDelete(Class clazz, StringBuilder sBuilder) {
		sBuilder.append("public void Delete" + clazz.getSimpleName() + "("+clazz.getSimpleName()+ " " + clazz.getSimpleName().toLowerCase() +"){");
		sBuilder.append("\n");
		System.out
				.println(" you can append jdbc or hibernate or ibatis ... to here");
		sBuilder.append("}");
		sBuilder.append("\n");
	}

	protected static void GenerateUpdate(Class clazz, StringBuilder sBuilder) {
		sBuilder.append("public void Update" + clazz.getSimpleName() + "("+clazz.getSimpleName()+ " " + clazz.getSimpleName().toLowerCase() +"){");
		sBuilder.append("\n");
		System.out
				.println(" you can append jdbc or hibernate or ibatis ... to here");
		sBuilder.append("}");
		sBuilder.append("\n");
	}

	protected static void GenerateList(Class clazz, StringBuilder sBuilder) {
		sBuilder.append("public void Query" + clazz.getSimpleName() + "(){");
		sBuilder.append("\n");
		System.out
				.println(" you can append jdbc or hibernate or ibatis ... to here");
		sBuilder.append("}");
		sBuilder.append("\n");
	}
}

package com.wjj.io.utils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;

public class IOUtil {
	
	public static void writeStringFileToDesk(byte[] data,String fileName)throws Exception{
		File file = new File(System.getProperty("user.dir")+"\\src\\com\\wjj\\generated\\dao",fileName + ".java");
		if(!file.getParentFile().exists()){
			file.getParentFile().mkdirs();
		}
		System.out.println("file.getAbsolutePath()---> " + file.getAbsolutePath());
		OutputStream os = new FileOutputStream(file);
		os.write(data,0,data.length);
		os.close();
	}
}

package com.wjj.test;

import com.wjj.generator.DAOGenerator;

public class TestMain {
	public static void main(String[] args) throws Exception{
		Class clazz = Class.forName("com.wjj.domain.User");
		System.out.println(clazz.getSimpleName());
		DAOGenerator.Generate(clazz);
	}
}

本tool 最终将会实现通过一个domain 自动生成其 dao ,service, action 及前台页面功能。
因为工司不让上外网， 因为公司无法上外网， 无法将公司里面实现完的共布出来，只能在家里重新写一个了。。 

评论

1 楼 w156445045 2013-10-30  

牛逼啊 哈哈。