ssh2+jrobin生成图片

好好的自我总结：

首先的通过hibernate操作获取数据生成RRd文件：

public RrdGraphDef createImageByRrd(String taskName,String osid,String nodeip,Integer time,String dayTime){
        String osName = System.getProperty("os.name");
        String baseDir=System.getProperty("java.io.tmpdir");
        if(osName.indexOf("Windows")>-1){
            baseDir="D:\\tomcat\\temp\\pps_monitor";
        }else{
            baseDir="/usr/local/tomcat/temp/pps_monitor";
        }
        String rrdPath=baseDir+File.separator+taskName+File.separator+taskName+"_"+osid+".rrd";
        String pngName=baseDir+File.separator+taskName+File.separator+osid+".png";
        //默认一天
        long startTime=0;
        long endTime=0;
        if(null != dayTime && !dayTime.equals("")){
            String sd = dayTime+" 00:00:00";
            String ed = dayTime+" 23:59:59";

            startTime = DateUtils.getDateToTimeStamp(DateUtils.toUtilDateFromString(sd, DateUtils.FORMAT1));
            endTime = DateUtils.getDateToTimeStamp(DateUtils.toUtilDateFromString(ed, DateUtils.FORMAT1));
        }else{
            if(time == 1){
                startTime = Util.getTime()-86400;
            }else if(time == 2){
                startTime = Util.getTime()-86400*6;
            }else if(time == 3){
                startTime = Util.getTime()-86400*30;
            }else if(time == 4){
                startTime = Util.getTime()-86400*360;
            }
            endTime = Util.getTime();
        }
        IJrobinTool tools=new JrobinTools();
        try {
            File file=new File(rrdPath);
            if(file.exists()){
                JrobinGraphParam param=new JrobinGraphParam();
                param.setRrdPath(rrdPath);
                param.setStartTime(startTime);
                param.setEndTime(endTime);
                param.setPngPath(pngName);
                param.setGraphTitle(nodeip+" - "+taskName);
                param.setY(taskName);
                RrdGraphDef graphDef=tools.graphingObj(param);
                SNUM = SNUM + 1;
                return graphDef;
            }
            FNUM = FNUM + 1;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

JrobinTools代码：

package com.pps.maya.service;

import java.awt.Color;
import java.awt.Font;
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;

import org.jrobin.core.ConsolFuns;
import org.jrobin.core.DsDef;
import org.jrobin.core.DsTypes;
import org.jrobin.core.FetchData;
import org.jrobin.core.FetchRequest;
import org.jrobin.core.RrdDb;
import org.jrobin.core.RrdDef;
import org.jrobin.core.RrdException;
import org.jrobin.core.Sample;
import org.jrobin.core.Util;
import org.jrobin.graph.RrdGraph;
import org.jrobin.graph.RrdGraphDef;

import com.pps.maya.util.JdbcTemplete;
import com.pps.tools.util.DateUtils;


public class JrobinTools implements IJrobinTool {

    // 默认间隔频率
    final static int step = 60;

    // 默认从多个数据中取综合值的方式
    private static final String DEFAULT_CONSOL_FUN = ConsolFuns.CF_AVERAGE;

    //默认数据库名
    private static final String DEFAULT_Data_NAME="input";


    public JrobinTools() {
        super();
    }

    @Override
    public RrdDef createRrdDef(String rootPath, String rrdName, long beginTime) {
        RrdDef rrdDef = null;
        try {
            File file = new File(rootPath);
            if (!file.exists())
                file.mkdirs();

            String rrdPath = rootPath +File.separator+ rrdName + ".rrd";
            rrdDef = new RrdDef(rrdPath,step);

            rrdDef.setStartTime(beginTime-step);

            DsDef dsDef = new DsDef(DEFAULT_Data_NAME, DsTypes.DT_GAUGE,step*10,Double.NaN,Double.NaN);
            rrdDef.addDatasource(dsDef);

            rrdDef.addArchive(DEFAULT_CONSOL_FUN, 0.5, 1,86400/step);        // 输入给数据源的数据每一个都保存下来
            rrdDef.addArchive(DEFAULT_CONSOL_FUN,0.5,7,480);                //每7笔数据，取平均值，然后保存
            rrdDef.addArchive(DEFAULT_CONSOL_FUN,0.5,30,480);              //一月
            rrdDef.addArchive(DEFAULT_CONSOL_FUN,0.5,360,480);            //一年

            return rrdDef;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }



    public void insertRrdData(String rrdPath,Double value,long collectTimeUnitsSecond) {
        RrdDb rrdDb = null;
        try {
            rrdDb = new RrdDb(rrdPath);
            Sample sample = rrdDb.createSample();
            System.out.println(rrdDb.getLastUpdateTime());
            sample.setTime(collectTimeUnitsSecond);
            if (value == null)
                value = Double.NaN;
            sample.setValue(DEFAULT_Data_NAME, value);
            sample.update();
        } catch (RrdException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (rrdDb != null)
                try {
                    rrdDb.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }
    }

    public void insertRrdData(RrdDef rrdDef, Double value,long collectTimeUnitsSecond) {
        RrdDb rrdDb = null;
        try {
            rrdDb = new RrdDb(rrdDef);
            Sample sample = rrdDb.createSample();
            sample.setTime(collectTimeUnitsSecond);
            if (value == null)
                value = Double.NaN;
            sample.setValue(DEFAULT_Data_NAME, value);
            sample.update();
        } catch (RrdException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (rrdDb != null)
                try {
                    rrdDb.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }
    }

    public RrdGraphDef graphingObj(JrobinGraphParam params){
        RrdGraphDef gDef=null;
        try {
            //图形定义
             gDef = new RrdGraphDef();
            gDef.setFilename(params.getPngPath());
            gDef.setWidth(500);
            gDef.setHeight(100);
            gDef.setImageFormat("png");
            //指定数据的时间跨度
            gDef.setTimeSpan(params.getStartTime(),params.getEndTime());

            // 不显示JRobin的签名
            gDef.setShowSignature(false);

            //设置最少值
            gDef.setMinValue(0);

            //设置Y轴
            gDef.setVerticalLabel(params.getY());

            //中文字体
          gDef.setSmallFont(new Font("Monospaced", Font.PLAIN, 11));
          gDef.setLargeFont(new Font("SansSerif", Font.BOLD, 14));

            //标题
            gDef.setTitle(params.getGraphTitle());

            //注释

            gDef.comment("From "+params.getStartDate()+" To "+params.getEndDate()+"\\c");

            gDef.datasource("input", params.getRrdPath(), "input",DEFAULT_CONSOL_FUN);
            gDef.area("input", Color.green, params.getY());
            //聚合
            gDef.gprint("input", "LAST", "Current: %5.11f");
            gDef.gprint("input", "MIN", "Min: %5.1lf");
            gDef.gprint("input", "AVERAGE", " Average: %5.1lf");
            gDef.gprint("input", "MAX", " Max: %5.1lf");

            return gDef;

        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public void fetchRrdData(String filePath, long startTime,
            long endTime) {
        try {
            // open the file
            RrdDb rrd = new RrdDb(filePath);

            // create fetch request using the database reference
            FetchRequest request = rrd.createFetchRequest(DEFAULT_CONSOL_FUN, startTime,endTime);

            // execute the request
            FetchData fetchData = request.fetchData();
            int columnCount = fetchData.getColumnCount();
            int rowCount = fetchData.getRowCount();
            long[] timestamps = fetchData.getTimestamps();
            System.out.println("[data column count:]" + columnCount);
            System.out.println("[data row count:]" + rowCount);

            // System.out.println("[fetch data dump:]" + fetchData.dump());
            // 循环获取数据
            double[][] values = fetchData.getValues();
            StringBuffer buffer = new StringBuffer("");
            for (int row = 0; row < rowCount; row++) {
                buffer.append(timestamps[row]);
                buffer.append(" "
                        + Util.getDate(timestamps[row]).toLocaleString());
                buffer.append(":  ");
                for (int dsIndex = 0; dsIndex < columnCount; dsIndex++) {
                    buffer.append((values[dsIndex][row]));
                    buffer.append("  ");
                }
                buffer.append("\n");
            }
            System.out.println("[fetch data display :]\n" + buffer);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}

action 生成图片方法：

/**
     * 生成图片流
     */
    public void creatImageByTask() {
        try {
            this.setNum(num);
            RrdGraphDef graphDef = webPGService.createImageByRrd(taskName,osid,nodeip,time,dayTime);
            RrdGraph graph = new RrdGraph(graphDef);

            BufferedImage image = new BufferedImage(graph.getRrdGraphInfo().getWidth(), graph.getRrdGraphInfo().getHeight(),BufferedImage.TYPE_INT_RGB);
            graph.render(image.getGraphics());
            ServletActionContext.getResponse().setContentType("image/png");
            ServletOutputStream out = ServletActionContext.getResponse().getOutputStream();
            ImageIO.write(image, "png",out);
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

页面显示图片方法：

<img src="action名称!creatImageByTask?参数" />