java类中使用Jfreechart的简单实例

package com.chart.test;

import java.awt.basicstroke;
import java.awt.color;
import java.awt.font;
import java.io.file;
import java.io.ioexception;
import java.io.printwriter;

import javax.servlet.http.httpsession;

import oracle.jrockit.jfr.openmbean.jfrstatstype;

import org.jfree.chart.chartfactory;
import org.jfree.chart.chartrenderinginfo;
import org.jfree.chart.chartutilities;
import org.jfree.chart.jfreechart;
import org.jfree.chart.axis.categoryaxis;
import org.jfree.chart.axis.categorylabelpositions;
import org.jfree.chart.axis.numberaxis;
import org.jfree.chart.entity.standardentitycollection;
import org.jfree.chart.plot.categoryplot;
import org.jfree.chart.plot.plotorientation;
import org.jfree.chart.renderer.category.lineandshaperenderer;
import org.jfree.chart.servlet.servletutilities;
import org.jfree.chart.title.legendtitle;
import org.jfree.data.category.defaultcategorydataset;
import org.jfree.ui.rectangleedge;

public class charttest
{
public static void main(string[] args){
charttest test=new charttest();
test.generatefile(test.getchart());
}

public jfreechart getchart(){
string series1 ="first";
string series2 ="second";

string type1 ="type 1";
string type2 ="type 2";
string type3 ="type 3";
string type4 ="type 4";
string type5 ="type 5";
string type6 ="type 6";
string type7 ="type 7";
defaultcategorydataset defaultcategorydataset = new defaultcategorydataset();
defaultcategorydataset.addvalue(1.0d, series1, type1);
defaultcategorydataset.addvalue(4d, series1, type2);
defaultcategorydataset.addvalue(3d, series1, type3);
defaultcategorydataset.addvalue(5d, series1, type4);
defaultcategorydataset.addvalue(5d, series1, type5);
defaultcategorydataset.addvalue(7d, series1, type6);
defaultcategorydataset.addvalue(7d, series1, type7);

defaultcategorydataset.addvalue(5d, series2, type1);
defaultcategorydataset.addvalue(7d, series2, type2);
defaultcategorydataset.addvalue(6d, series2, type3);
defaultcategorydataset.addvalue(8d, series2, type4);
defaultcategorydataset.addvalue(4d, series2, type5);
defaultcategorydataset.addvalue(4d, series2, type6);
defaultcategorydataset.addvalue(2d, series2, type7);

jfreechart jfreechart = chartfactory.createlinechart("line chart demo 1","type","value",defaultcategorydataset,plotorientation.vertical,true,true,false);
//  chartfactory.createlinechart(title, categoryaxislabel, valueaxislabel, dataset, orientation, legend, tooltips, urls)
//  上面语句legend设置为false时，表示新建的jfreechart无图例，为true时，自带图例，默认位置为底部。
jfreechart.getlegend().setposition(rectangleedge.right);//获取图例，设置位置

//  legendtitle legendtitle = new legendtitle(jfreechart.getplot());//创建图例，若有默认的，仍然创建，此时存在两个。
//  legendtitle.setposition(rectangleedge.right);//设置图例的位置
//  jfreechart.addlegend(legendtitle);//图表中添加图例

jfreechart.setbackgroundpaint(color.white);//设置图例的背景色

categoryplot categoryplot = (categoryplot)jfreechart.getplot();

categoryplot.setbackgroundpaint(color.lightgray);
categoryplot.setdomaingridlinesvisible(true);
categoryplot.setrangegridlinesvisible(true);
categoryplot.setdomaingridlinepaint(color.white);//设置横坐标网格线
categoryplot.setrangegridlinepaint(color.white);//设置纵坐标网格线

// １、对标题
font font1 = new font("黑体",font.bold, 14); // 设定字体、类型、字号
jfreechart.gettitle().setfont(font1); // 标题

// 3、下面的方块区域是 legendtitle 对象
font font3 = new font("隶书",font.bold, 12); // 设定字体、类型、字号
jfreechart.getlegend().setitemfont(font3);// 最下方
// 这是处理ｐlot里面的横轴，同理可以正理竖轴
categoryaxis categoryaxis = categoryplot.getdomainaxis(); // 横轴上的
//纵坐标换行显示
//  categoryaxis.setmaximumcategorylabellines(10);//行数，根据需要自己设
//  categoryaxis.setmaximumcategorylabelwidthratio(0.5f);//每行宽度，这里设一个汉字宽

categoryaxis.setcategorylabelpositions(categorylabelpositions.up_45);// 45度倾斜,可以改成其他,默认是水平

numberaxis numberaxis = (numberaxis)categoryplot.getrangeaxis();
numberaxis.setstandardtickunits(numberaxis.createintegertickunits());// 数据轴的数据标签（可以只显示整数标签，需要将autotickunitselection设false）
numberaxis.setautorangeincludeszero(true);//是否强制在自动选择的数据范围中包含0

categoryaxis.setticklabelfont(new font("sansserif",font.bold, 12));//坐标轴标尺值字体
numberaxis.setticklabelfont(new font("simsun", font.bold, 12));//
// ２、对图里面的汉字设定,也就是ｐlot的设定
font font2 = new font("simsun", font.bold, 16); // 设定字体、类型、字号
categoryaxis.setlabelfont(font2);//坐标轴标题字体
numberaxis.setlabelfont(font2);

 

lineandshaperenderer lineandshaperenderer = (lineandshaperenderer)categoryplot.getrenderer();
lineandshaperenderer.setshapesvisible(true); //series 点（即数据点）可见

lineandshaperenderer.setseriesstroke(0, new basicstroke(2.0f, 1, 1, 1.0f, new float[] {
10f, 6f
}, 0.0f)); //定义series为"first"的（即series1）点之间的连线 ，这里是虚线，默认是直线
lineandshaperenderer.setseriesstroke(1, new basicstroke(2.0f, 1, 1, 1.0f, new float[] {
6f, 6f
}, 0.0f)); //定义series为"second"的（即series2）点之间的连线

return jfreechart;　　　　//返回jfreechart
}

public void generatefile(jfreechart chart){
　　string filename = null;
　　try {
　　　　chartutilities.savechartasjpeg(new file("c:\\piechart.jpg"),chart,600,600); //生成图表文件到指定位置
　　} catch (ioexception e)
　　{
　　e.printstacktrace();
　　}
}
public string getfilename(jfreechart chart,httpsession session,printwriter pw){
　　string filename = null;
　　chartrenderinginfo info=new chartrenderinginfo(new standardentitycollection());
　　try {
　　　　filename = servletutilities.savechartaspng(chart, 700, 450, info, session);  //生成临时文件
　　　　chartutilities.writeimagemap(pw, filename, info, false);
　　　　pw.flush();
　　}
　　catch (ioexception e)
　　{
　　e.printstacktrace();
　　}

　　//  string graphurl = request.getcontextpath()+ "/servlet/displaychart?filename=" + filename;
　　//  request.setattribute("filename",filename);
　　// request.setattribute("graphurl",graphurl);
　　return filename;//返回生成图片的文件名 ,传入jsp
　}

}

jsp中使用：

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
<%@ page import="com.chart.test.*"%>
<%@ page import = "java.io.printwriter" %>
<%
string path = request.getcontextpath();
string basepath = request.getscheme()+"://"+request.getservername()+":"+request.getserverport()+path+"/";
%>
<%
charttest chart=new charttest();
string filename=chart.getfilename(chart.getchart(), session, new printwriter(out));
string graphurl = request.getcontextpath() + "/displaychart?filename=" + filename;
%>
<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
<head>
<base href="<%=basepath%>">
<title>my jsp 'jspchart.jsp' starting page</title>
</head>

<body>

<img src="<%= graphurl %>" width=500 height=300 border=0 usemap="<%= filename %>">
</body>
</html>