FusionCharts生成报表应用

最新推荐文章于 2021-02-15 21:00:54 发布

java小强

最新推荐文章于 2021-02-15 21:00:54 发布

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本文链接：https://blog.youkuaiyun.com/cuisuqiang/article/details/41080861

本文介绍如何使用Java和FusionCharts库构建动态图表，包括数据组装、Servlet请求、页面配置及展示过程。

1.需要组装要展示的数据，至于如何怎样去设计数据模型，看你要展示的图形和需要的数据就行了。来个简单的。

实体类，只有两个属性，也可以使用Bean里面的实体类，无所谓了。

package com.golden.entity;

public class Doughnut {

	public Doughnut() {
	}

	private String label;

	private int value;

	public String getLabel() {
		return label;
	}

	public void setLabel(String label) {
		this.label = label;
	}

	public int getValue() {
		return value;
	}

	public void setValue(int value) {
		this.value = value;
	}

	public Doughnut(String label, int value) {
		super();
		this.label = label;
		this.value = value;
	}

}

2.做一个请求到Servlet，简单使用，也可以请求到Action，无所谓。该Servlet从后来得到数据，然后设置到该请求环境中。

package com.golden.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.golden.entity.Doughnut;

@SuppressWarnings("serial")
public class FirstServlet extends HttpServlet {
	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		List<Doughnut> list = new ArrayList<Doughnut>();
		Doughnut d1 = new Doughnut("France", 17);
		Doughnut d2 = new Doughnut("India", 12);
		Doughnut d3 = new Doughnut("Brazil", 18);
		Doughnut d4 = new Doughnut("USA", 8);
		Doughnut d5 = new Doughnut("Australia", 10);
		Doughnut d6 = new Doughnut("Japan", 7);
		Doughnut d7 = new Doughnut("England", 5);
		Doughnut d8 = new Doughnut("Nigeria", 12);
		Doughnut d9 = new Doughnut("Italy", 8);
		Doughnut d10 = new Doughnut("China", 10);
		Doughnut d11 = new Doughnut("Canada", 19);
		Doughnut d12 = new Doughnut("Germany", 15);
		list.add(d1);
		list.add(d2);
		list.add(d3);
		list.add(d4);
		list.add(d5);
		list.add(d6);
		list.add(d7);
		list.add(d8);
		list.add(d9);
		list.add(d10);
		list.add(d11);
		list.add(d12);
		request.getSession().setAttribute("list", list);
		request.getRequestDispatcher("/show.jsp").forward(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

3.配置，例如需要的Swf文件和JS文件，因为需要JSTL，所以要引入包，页面引进标签，一些低级的工作，赶紧搞定。

4.页面加载时初始化方法解析数据生成XML文件的字符串，然后设置给SWF，他就显示数据了，搞定。

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@page import="com.golden.entity.Doughnut"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href="<%=basePath%>">
		<title>FusionCharts报表生成页面</title>
		<script type="text/javascript" src="<%=request.getContextPath() %>/js/FusionCharts.js"></script>
		<script type="text/javascript">
		var majorXml;
		//var list;
		function init(){
			initXml();
		}
		function initXml(){
			majorXml="<chart palette='2' showBorder='1'>";
			majorXml += "<c:forEach var ='item' items='${list}'><set label='${item.label}' value='${item.value}'/></c:forEach>";
			majorXml+="</chart>";
			showDou3D();
		}
   		function showDou3D(){
	       var myChart=new FusionCharts("<%=request.getContextPath()%>/FusionCharts/Doughnut3D.swf", "ChartId", "600", "300", "0", "0");
	       myChart.setDataXML(majorXml);
	       myChart.render("majorbus");
	    }
		</script>
	</head>

	<body onload="init()">
		<center>
			<div style="" id="majorbus">
			</div>
		</center>
	</body>
</html>

5.不知道文件在哪里不要紧，在Webroot下建立js和FusionCharts文件夹，分别把附近弄进去，没有JSTL的LIB里有。