Jtable添加图片，并自由改变图片大小

本文介绍了一个自定义JTable渲染器的实现方式，该渲染器能够处理图书列表中的图片展示，并保持良好的界面效果。通过重写TableCellRenderer接口，实现了对图片单元格的自适应渲染。

需要重写方法

1、jtable中部分代码。。主要看图片处理的部分

public JPanel getBookPanel(Vector<Book> bookList) throws IOException {
		Vector<String> title = new Vector<String>();// 列名
		title.add("书图");
		title.add("isbn");
		title.add("书名");
		title.add("书类型");
		title.add("单价");
		title.add("出版社");
		title.add("作者");
		Vector<Vector<Object>> data = new Vector<Vector<Object>>();
		for (int i = 0; i < bookList.size(); i++) {
			Vector<Object> v = new Vector<Object>();
			Book b = bookList.get(i);
			ImageIcon icon = new ImageIcon("images/" + b.getBookImage());//图片处理
			icon.setImage(icon.getImage().getScaledInstance(80,100,Image.SCALE_DEFAULT));
		    Image  img = icon.getImage();
			v.add(img);
			v.add(b.getIsbn());
			v.add(b.getBookName());
			v.add(b.getBookType());
			v.add(b.getPrice());
			v.add(b.getPublish());
			v.add(b.getAuthor());
			data.add(v);
		}
		model = new DefaultTableModel(data, title);
		table = new JTable(model);
		  table.getTableHeader().setReorderingAllowed(false);   //不可整列移动   
		  table.getTableHeader().setResizingAllowed(false); 
		
		table.getColumnModel().getColumn(0)
				.setCellRenderer(new ImageRenderer());
		table.setRowHeight(100);

2、ImageRenderer类

package com.seven.view;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Image;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;

public class ImageRenderer implements TableCellRenderer
{

	  @SuppressWarnings("unchecked")
	  @Override
	  public Component getTableCellRendererComponent(
	          JTable table, Object value, boolean isSelected, 
	          boolean hasFocus, int rowIndex, int columnIndex) {
	    
	    if( value instanceof Image ){
	    	JLabel jLabel = new JLabel();
	    	jLabel.setLayout(new BorderLayout());//设置布局
	    	jLabel.setIcon(new ImageIcon((Image)value));//给jlable设置图片
	      return jLabel;
	    }
	    
	    else if( value instanceof File ) {
	      try {
	        return new JLabel(new ImageIcon(ImageIO.read((File)value)));
	      } catch(IOException ex) {
	        throw new RuntimeException(ex.getMessage(), ex);
	      }
	    }
	    
	    else {
	      String val = String.valueOf(value);
	      try {
	        return new JLabel(new ImageIcon(ImageIO.read(new File(val))));
	      } catch(IOException ex) {
	        throw new RuntimeException(ex.getMessage(), ex);
	      }
	    }
	  }
	}