Question

用java编写一个颜色为红色，粗线型的笑脸和哭脸，需要继承JFrame类，用java中的绘制图形做

Answer 1

JFreeChart------------它是一种组件技术，专用于在java中实现图形报表

----------饼图，柱状图,折线图

JFreeChart它是一种独立图表技术，它与struts2本身并无关系，只不过，它可以与struts2配合使用

饼图的步骤:

1、创建一个web工程
2、导入struts2框架（core,struts2-jfreeChart）
3、向工程导入(jfreechart.jar,jcommon.jar)
4、创建BaseAction继承于ActionSupport,并且，在类中，声明一个属性 JFreeChart chart;并且生成set,get方法
5、编写ChartAction类，继承于BaseAction
6、在ChartAction类中，编写 showPie()用于显示饼图
7、在struts.xml配置当前action
8、在index.jsp配置，通过<img src="chart!showPie.action">进入到指定方法
=================================================================================================================
9、编写ChartDao类，模拟从数据库查询数据

//得到饼图需要的数据集
public DefaultPieDataset getPieDataset(){

DefaultPieDataset dp = new DefaultPieDataset();
dp.setValue("联想",321);
dp.setValue("华硕",189);
dp.setValue("戴尔",98);
dp.setValue("IBM",213);
dp.setValue("Apple",287);
dp.setValue("惠普",120);
dp.setValue("SONY",87);

return dp;
}

==============================================================================================================
10、在ChartAction中的showPie方法，生成饼图

public String showPie(){
//得以要显示的数据集,根据数据，生成饼图
DefaultPieDataset dp = dao.getPieDataset();
//chart = ChartFactory.createPieChart("标题",要显示在饼图中的数据集,是否显示颜色说明,"是否显示工具提示","是否显示网络地址 ");
chart = ChartFactory.createPieChart("一季度各电脑品牌销售汇总",dp,true,false,false);
return "success";
}
=============================================================================================================
11、在struts.xml文件，进行相关配置

<package name="struts2" extends="struts-default">
<result-types>
<result-type name="chart" class="org.apache.struts2.dispatcher.ChartResult"/>
</result-types>
<action name="chart" class="org.java.web.ChartAction">
<result name="success" type="chart">
<param name="width">800</param>
<param name="height">600</param>
</result>
</action>
</package>

=================================================================================================================

12、解决乱码

标题区的乱码

Font f1 = new Font("隶书",Font.BOLD,40);
TextTitle tt = new TextTitle("一季度各电脑品牌销售汇总",f1);
chart.setTitle(tt);//绑定标题

颜色提示区乱码

Font f2 = new Font("隶书",Font.BOLD,20);
LegendTitle lt = chart.getLegend();
lt.setItemFont(f2);//设置该区域的字体

解决饼图中的乱码
PiePlot pp = (PiePlot) chart.getPlot();//得到饼图区域
pp.setLabelFont(f2);//设置饼图区域中的字体

=============================================================================================================

13、设置饼图中要显示的数据格式

//该对象，用于指定饼图要显示的数据格式 //0:key //1:value 2:百分比
StandardPieSectionLabelGenerator sc = new StandardPieSectionLabelGenerator("{0},{1}台,{2}");
//把显示的格式，绑定饼图中
pp.setLabelGenerator(sc);

需要完整版请联系我

Answer 2

/*
 * Copyright (c) cherry  Co. Ltd.
 * All right reserved.
 */
package com.cherry.swing;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.QuadCurve2D;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.swing.JFrame;

/**
 * @version %I% %G%, 2016年1月7日 下午2:14:17
 * @author cherry
 */
public class SmileDemo extends JFrame {

    /**
     * 
     */
    private static final long serialVersionUID = 133080909855022641L;

    private static final SmileDemo mSmileDemo;

    private FaceClass mSmileFaceClass;
    private FaceClass mCryFaceClass;
    private FaceClass[] mFaceClassArr = new FaceClass[2];

    static {
        mSmileDemo = new SmileDemo("含泪的微笑");
    }

    public SmileDemo() {
    }

    /**
     * @param cTitle
     *            : 窗口标题
     */
    public SmileDemo(String cTitle) {
        super(cTitle);
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.awt.Container#paintComponents(java.awt.Graphics)
     */
    @Override
    public void paint(Graphics g) {
        super.paintComponents(g);
        Graphics2D tGraphics2D = (Graphics2D) g;
        this.paintInstance(tGraphics2D);
    }

    public void paintInstance(Graphics2D cGraphics2D) {
        cGraphics2D.setColor(Color.red);
        cGraphics2D.setStroke(new BasicStroke(3f));// 设置线条粗细为3像素
        cGraphics2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);// 消除锯齿

        for (FaceClass fc : mFaceClassArr) {
            Method[] tMethodArr = fc.getClass().getMethods();
            for (Method m : tMethodArr) {
                String tMethodName = m.getName();// 获取方法名
                if (tMethodName.endsWith("ChartPoint")) {
                    ChartPoint tChartPoint;
                    try {
                        tChartPoint = (ChartPoint) m.invoke(fc, null);
                        cGraphics2D.setColor(Color.red);
                        if(tMethodName.contains("Mouth")) {
                            //嘴
                            cGraphics2D.draw(new QuadCurve2D.Float(tChartPoint.xHor, tChartPoint.yVer, tChartPoint.xMid, tChartPoint.yMid, tChartPoint.xLong, tChartPoint.yWidth));
                        } else { 
                            if(tMethodName.contains("Eye") || tMethodName.contains("Eye")) {
                                //眼
                                cGraphics2D.drawOval(tChartPoint.xHor, tChartPoint.yVer, tChartPoint.xLong, tChartPoint.yWidth);
                                cGraphics2D.setColor(Color.black);//给眼睛填充黑色
                                cGraphics2D.fillOval(tChartPoint.xHor+2, tChartPoint.yVer+1, tChartPoint.xLong-2, tChartPoint.yWidth-2);
                            } else {
                                //轮廓
                                cGraphics2D.drawOval(tChartPoint.xHor, tChartPoint.yVer, tChartPoint.xLong, tChartPoint.yWidth);
                            }
                        }
                    } catch (IllegalArgumentException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IllegalAccessException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (InvocationTargetException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }
        }
    }

    public void initWindow() {
        mSmileDemo.setDefaultCloseOperation(EXIT_ON_CLOSE);// 退出时关闭程序
        mSmileDemo.setSize(800, 600);
        mSmileDemo.getContentPane().setBackground(Color.white);
        // mSmileDemo.pack();

        // 初始化SmileOrCry相关坐标参数
        // 笑脸
        ChartPoint tFaceChartPoint_Smile = mSmileDemo.new ChartPoint(50, 140,
                320, 320);
        ChartPoint tLeft_EyeChartPoint_Smile = mSmileDemo.new ChartPoint(120,
                200, 20, 40);
        ChartPoint tRight_EyeChartPoint_Smile = mSmileDemo.new ChartPoint(280,
                200, 20, 40);
        ChartPoint tMouthChartPoint_Smile = mSmileDemo.new ChartPoint(120, 380,
                210, 450, 300, 380);
        mSmileFaceClass = mSmileDemo.new FaceClass(tFaceChartPoint_Smile,
                tLeft_EyeChartPoint_Smile, tRight_EyeChartPoint_Smile,
                tMouthChartPoint_Smile);
        // 哭脸
        ChartPoint tFaceChartPoint_Cry = mSmileDemo.new ChartPoint(450, 140,
                320, 320);
        ChartPoint tLeft_EyeChartPoint_Cry = mSmileDemo.new ChartPoint(520,
                200, 20, 40);
        ChartPoint tRight_EyeChartPoint_Cry = mSmileDemo.new ChartPoint(680,
                200, 20, 40);
        ChartPoint tMouthChartPoint_Cry = mSmileDemo.new ChartPoint(520, 380,
                610, 320, 700, 380);
        mCryFaceClass = mSmileDemo.new FaceClass(tFaceChartPoint_Cry,
                tLeft_EyeChartPoint_Cry, tRight_EyeChartPoint_Cry,
                tMouthChartPoint_Cry);
        // 将两个表情存入数组
        mFaceClassArr[0] = mSmileFaceClass;
        mFaceClassArr[1] = mCryFaceClass;

        mSmileDemo.setVisible(true);
    }

    private class FaceClass {
        private ChartPoint mFaceChart_Point;// 脸部坐标及相关参数
        private ChartPoint mLeft_EyeChartPoint;// 左眼坐标及相关参数
        private ChartPoint mRight_EyeChartPoint;// 右眼坐标及相关参数
        private ChartPoint mMouthChart_Point;// 嘴巴坐标及相关参数

        public ChartPoint getmFaceChartPoint() {
            return mFaceChart_Point;
        }

        public ChartPoint getmLeft_EyeChartPoint() {
            return mLeft_EyeChartPoint;
        }

        public ChartPoint getmRight_EyeChartPoint() {
            return mRight_EyeChartPoint;
        }

        public ChartPoint getmMouthChartPoint() {
            return mMouthChart_Point;
        }

        public FaceClass(ChartPoint cFaceChart_Point,
                ChartPoint mLeft_EyeChartPoint,
                ChartPoint mRight_EyeChartPoint, ChartPoint mMouthChart_Point) {
            this.mFaceChart_Point = cFaceChart_Point;
            this.mLeft_EyeChartPoint = mLeft_EyeChartPoint;
            this.mRight_EyeChartPoint = mRight_EyeChartPoint;
            this.mMouthChart_Point = mMouthChart_Point;
        }
    }

    private class ChartPoint {
        private int xHor;// 横坐标||或左端点横坐标
        private int yVer;// 纵坐标||或左端点纵坐标
        private int xLong;// 长||或右端点横坐标
        private int yWidth;// 宽||或右端点纵坐标
        private int xMid;// 嘴巴方向
        private int yMid;// 嘴巴方向

        public int getxMid() {
            return xMid;
        }

        public int getyMid() {
            return yMid;
        }

        public int getxHor() {
            return xHor;
        }

        public int getyVer() {
            return yVer;
        }

        public int getxLong() {
            return xLong;
        }

        public int getyWidth() {
            return yWidth;
        }

        public ChartPoint(int xHor, int yVer, int xLong, int yWidth) {
            this.xHor = xHor;
            this.yVer = yVer;
            this.xLong = xLong;
            this.yWidth = yWidth;
        }

        public ChartPoint(int xHor, int yVer, int xMid, int yMid, int xLong, int yWidth) {
            this.xHor = xHor;
            this.yVer = yVer;
            this.xMid = xMid;
            this.yMid = yMid;
            this.xLong = xLong;
            this.yWidth = yWidth;
        }
    }

    public static void main(String[] args) {
        mSmileDemo.initWindow();
    }
}

Answer 3

去csdn，多得去了

Answer 4

20块，支付宝

Answer 5

这个还是要一点代码量的