1.action

@Controller(value = "pieAction")@Scope("prototype")public class PieAction extends ActionSupport {    @Autowired    private PieService pieService;    // 图表    private JFreeChart jFreeChart;    @Override    public String execute() throws Exception {        // 1准备数据集        DefaultPieDataset pieDate = new DefaultPieDataset();        // 2查询数据        List
     
       list = pieService.find();        // 3循环放入数据集        for (Pie pie : list) {            pieDate.setValue(pie.getName(), pie.getNum());        }        // 设置主题及编码(省略主题设置)        StandardChartTheme sct = new StandardChartTheme("CN");        ChartFactory.setChartTheme(sct);        // 生成char        this.jFreeChart = ChartFactory.createPieChart3D("标题-测试", pieDate);                // 乱码解决        TextTitle textTitle = jFreeChart.getTitle();        textTitle.setFont(new Font("微软雅黑", Font.BOLD, 12));        PiePlot plot = (PiePlot) jFreeChart.getPlot();        // 设置饼状图体里的的各个标签字体        plot.setLabelFont(new Font("微软雅黑", Font.BOLD, 12));        // 设置图表下方的图例说明字体        jFreeChart.getLegend().setItemFont(new Font("微软雅黑", Font.BOLD, 12));        // 获取到要保存的路径        String realPath = ServletActionContext.getRequest().getRealPath("img");        // 保存图片到路径        FileOutputStream fos = new FileOutputStream(realPath + "/test.jpg");        ChartUtilities.writeChartAsJPEG(fos, 1, jFreeChart, 400, 300, null);        fos.close();        return SUCCESS;    }    public PieService getPieService() {        return pieService;    }    public void setPieService(PieService pieService) {        this.pieService = pieService;    }    public JFreeChart getjFreeChart() {        return jFreeChart;    }    public void setjFreeChart(JFreeChart jFreeChart) {        this.jFreeChart = jFreeChart;    }}
     

2.jsp页面