labelgenerator.java

开源jfreechart

package org.yangyang.test;

import org.jfree.chart.labels.CategoryItemLabelGenerator;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
/*-------------设置柱状体顶端的数据显示--------------*/
public class LabelGenerator implements CategoryItemLabelGenerator {

	private double threshold;
	 
	 public LabelGenerator(double threshold) {
	 this.threshold = threshold;
	 }
	 
	 public LabelGenerator(){
		 
	 }
	 
	 public String generateLabel(CategoryDataset dataset,int row,int column) {
	 String result = null;
	 final Number value = dataset.getValue(row, column);
	 if (value != null) {
	 final double v = value.doubleValue();
	 if (v > this.threshold) {
	 result = value.toString();
	 }
	 }
	 return result;
	 }
	 
	 public String generateRowLabel(CategoryDataset dataset,
	 int row){
	 return null;
	 
	 }
	 public String generateColumnLabel(CategoryDataset dataset,
	 int column){
	 return null;
	 }
	 
	 
	 

	 /*-----------数据集合封装-------------*/
	 public static CategoryDataset createDataset(){
	 String s1="笨笨";
	 String s2="蛋蛋";
	 String s3="傻傻";
	 String s4="瓜瓜";
	 
	 String c1="第一场";
	 String c2="第二场";
	 String c3="第三场";
	 String c4="第四场";
	 String c5="第五场";
	 
	 /*-------------封装图表使用的数据集-------------*/
	 DefaultCategoryDataset dataset=new DefaultCategoryDataset();
	 dataset.setValue(3.0,s1,c1);
	 dataset.setValue(2.0,s1,c2);
	 dataset.setValue(3.0,s1,c3);
	 dataset.setValue(4.0,s1,c4);
	 dataset.setValue(5.0,s1,c5);
	 
	 dataset.setValue(5.0,s2,c1);
	 dataset.setValue(4.0,s2,c2);
	 dataset.setValue(3.0,s2,c3);
	 dataset.setValue(2.0,s2,c4);
	 dataset.setValue(1.0,s2,c5);
	 
	 dataset.setValue(1.0,s3,c1);
	 dataset.setValue(2.0,s3,c2);
	 dataset.setValue(3.0,s3,c3);
	 dataset.setValue(2.0,s3,c4);
	 dataset.setValue(1.0,s3,c5);
	 
	 dataset.setValue(1.0,s4,c1);
	 dataset.setValue(2.0,s4,c2);
	 dataset.setValue(3.0,s4,c3);
	 dataset.setValue(4.0,s4,c4);
	 dataset.setValue(5.0,s4,c5);
	 
	 
	 return dataset;
	 }
	 
	

}