通用各类文档读写的设计与实现

在我们日常的项目开发中，经常碰到需要读取word等文档的需求，如何来设计和实现呢？我的实现代码如下：

1. 定义一个IDoc的接口

 

package com.common.doc;

public interface IDoc {
    public String read();
    public boolean write(String str);
    public boolean rename(String newName);
    public boolean exists();
}

package com.common.doc;

public interface IDoc {
    public String read();
    public boolean write(String str);
    public boolean rename(String newName);
    public boolean exists();
}

 

1. 定义一个AbstractDoc的抽象类，这个类实现一般的文件操作，如存在判断等

 

package com.common.doc;

import java.io.File;

public class AbstractDoc implements IDoc{

    private String filepath;

    public String getFilepath() {
        return filepath;
    }
    public AbstractDoc(String path){
        this.filepath = path;
    }
    public boolean exists() {
        File f=new File(filepath);
        return f.exists();
    }
    @Override
    public String read(){
        return "";
    }

    public boolean rename(String newName) {
        try{
            File f=new File(filepath);
            String str=filepath.substring(0,filepath.lastIndexOf("\\"));
            f.renameTo(new File(str+"\\"+newName));
            }catch(Exception ex)
            {
              return false;
            }
            return true;
    }
    @Override
    public boolean write(String str) {
        return false;
    }

}

package com.common.doc;

import java.io.File;

public class AbstractDoc implements IDoc{

    private String filepath;

    public String getFilepath() {
        return filepath;
    }
    public AbstractDoc(String path){
        this.filepath = path;
    }
    public boolean exists() {
        File f=new File(filepath);
        return f.exists();
    }
    @Override
    public String read(){
        return "";
    }

    public boolean rename(String newName) {
        try{
            File f=new File(filepath);
            String str=filepath.substring(0,filepath.lastIndexOf("\\"));
            f.renameTo(new File(str+"\\"+newName));
            }catch(Exception ex)
            {
              return false;
            }
            return true;
    }
    @Override
    public boolean write(String str) {
        return false;
    }

}

 

1. 各个文档继承AbstractDoc的read，write重载函数即可

如Wod实现代码如下：

package com.common.doc;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.poi.hwpf.extractor.WordExtractor;

public class WordDoc extends AbstractDoc{

    public WordDoc(String path){
        super(path);
    }

    public String read(){
        StringBuffer sb = new StringBuffer();
        try {
            InputStream is = new FileInputStream(super.getFilepath());
            WordExtractor ex = new WordExtractor(is);// is是WORD文件的InputStream
            sb.append(ex.getText());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sb.toString();
    }
}

package com.common.doc;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.poi.hwpf.extractor.WordExtractor;

public class WordDoc extends AbstractDoc{

    public WordDoc(String path){
        super(path);
    }

    public String read(){
        StringBuffer sb = new StringBuffer();
        try {
            InputStream is = new FileInputStream(super.getFilepath());
            WordExtractor ex = new WordExtractor(is);// is是WORD文件的InputStream
            sb.append(ex.getText());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sb.toString();
    }
}

 

1. 测试代码

IDoc doc = new WordDoc("c:\\测试文档.doc");
if(doc.exists()){
 System.out.println(doc.read());
}else{
 System.out.println("word不存在");
}

IDoc doc = new WordDoc("c:\\测试文档.doc");
if(doc.exists()){
 System.out.println(doc.read());
}else{
 System.out.println("word不存在");
}

  欢迎各位拍砖讨论！