struts2与JFreeChart、JasperReport整合 - HelloWorld开发者社区

1.struts2与jfreechart结合

（1），查看帮助文档即可以知道如何配置。首先把struts2文件夹下的lib中的 struts2-jfreechart-plugin-2.1.8.1.jar包加入到项目下，注意此时的struts2-jfreechart- plugin-2.1.8.1.jar中的struts-plugin.xml文件中应该为：

150 200

(2).在struts.xml文件中，配置如下类似的信息：

// 从 jfreechart-default继承

           400
         600

（3）在action中写上类似的内容，如：

package com.biped.struts.action;

import java.awt.Font;
import java.util.List;
import java.util.Map;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class SelectAction extends ActionSupport{

private JFreeChart chart;//必须提供该属性，提供getter方法，且名字要为chart

private List interest;//这是接收用户选择的项目

public JFreeChart getChart() {//需要自己产生JFreeChart对象
   JFreeChart chart = ChartFactory.createBarChart3D("爱好兴趣调查", "项目","比例", createDataset(), PlotOrientation.VERTICAL, true, true,true);

   TextTitle tt = chart.getTitle();
   tt.setFont(new Font("黑体",Font.BOLD,20));

   chart.getLegend().setItemFont(new Font("宋体",Font.ITALIC,10));

   CategoryPlot plot = chart.getCategoryPlot();
   CategoryAxis domainAxis = plot.getDomainAxis();
   domainAxis.setLabelFont(new Font("宋体",Font.ITALIC,14));
   domainAxis.setTickLabelFont(new Font("宋体",Font.ITALIC,14));
   domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);

   ValueAxis valueAxis = plot.getRangeAxis();
   valueAxis.setLabelFont(new Font("宋体",Font.ITALIC,14));
   valueAxis.setTickLabelFont(new Font("宋体",Font.ITALIC,14));
   return chart;
}
public List getInterest() {
   return interest;
}

public void setChart(JFreeChart chart) {
this.chart = chart;
}

public void setInterest(List interest) {
this.interest = interest;
}

@Override
public String execute() throws Exception {
return SUCCESS;
}

@SuppressWarnings("unchecked")
public Map addSelectResult(List list){//应该从数据库中取，
   //这里只是为了模拟，放在Application中
   ActionContext context = ActionContext.getContext();
   Map map = context.getApplication();
   for(String str : list){
    if(null==map.get(str)){
     map.put(str,1);
    }else{
     map.put(str, (Integer)map.get(str)+1);
    }
   }
   return map;
}

@SuppressWarnings("unchecked")
public CategoryDataset createDataset(){//收集数据，并产生相应的Dataset
   DefaultCategoryDataset dataset = new DefaultCategoryDataset();
   Map map = addSelectResult(this.getInterest());

   dataset.setValue((Integer)map.get("football"), "a", "足球");
   dataset.setValue((Integer)map.get("basketball"), "b", "篮球");
   dataset.setValue((Integer)map.get("volleyball"), "c", "排球");
   dataset.setValue((Integer)map.get("pingpong"), "d", "乒乓球");
   dataset.setValue((Integer)map.get("badminton"), "e", "羽毛球");

   return dataset;
}
}

(4).jsp中的内容：

<s:form action="select">

<s:checkbox label="足球" name="interest" fieldValue="football" labelposition="left">
<s:checkbox label="篮球" name="interest" fieldValue="basketball" labelposition="left">
<s:checkbox label="排球" name="interest" fieldValue="volleyball" labelposition="left">
<s:checkbox label="乒乓球" name="interest" fieldValue="pingpong" labelposition="left">
<s:checkbox label="羽毛球" name="interest" fieldValue="badminton" labelposition="left">
<s:submit>

(5).结果：

2.和JFreeChart类似，从lib目录下拷贝struts2-jasperreports-plugin-2.1.8.1.jar包到项目中，其中的struts-plugin.xml应该为这样：

接下来配置struts.xml，可以参见struts2的帮助文档，从文档可以知道，现在的jasperreport插件基本上都是只支持list 类型的数据源，因此要是数据源是如JRDataSource等的，可以先存在list中，然后再进行配置，文档中说明了几个参数是必须要指定的，如：

<result name="success"

type="jasper"

<param name="location"

foo.jasper

<param name="dataSource"

mySource

<param name="format"

CSV

仿照其配置，可以写上：

/reports/reportTest.jasper list HTML 其中的format格式应该参考JasperReportConstants类中的常量。

最后在对应的ReportAction上的java内容为：

package com.biped.struts2.action;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.biped.struts2.domain.User;
import com.opensymphony.xwork2.ActionSupport;

public class ReportAction extends ActionSupport {

private static final long serialVersionUID = 1L;
@SuppressWarnings("unused")
private List list;

public List getList() {
return getDataSource();
}

public void setList(List list) {
this.list = list;
}

// 这里把连接数据库的方法放在一起
private static Connection getConnection() {
   Connection conn = null;
   try {
    Class.forName("com.mysql.jdbc.Driver");
    String dbUrl = "jdbc:mysql://localhost:3306/drp";
    String username = "root";
    String password = "root";
    conn = DriverManager.getConnection(dbUrl, username, password);
   } catch (ClassNotFoundException e) {
    e.printStackTrace();
   } catch (SQLException e) {
    e.printStackTrace();
   }
   return conn;
}

@SuppressWarnings("static-access")//取出数据并填充list
public List getDataSource() {
   String sql = "select * from t_user";
   Connection conn = this.getConnection();
   PreparedStatement statement = null;
   ResultSet result = null;
   List list = new ArrayList();
   try {
    User user = null;
    statement = conn.prepareStatement(sql);
    result = statement.executeQuery();
    while (result.next()) {
     user = new User();
     user.setUserId(result.getString("user_id"));
     user.setUserName(result.getString("user_name"));
     user.setPassword(result.getString("password"));
     user.setEmail(result.getString("email"));
     user.setCreateDate(result.getTimestamp("create_date"));
     list.add(user);
    }
   } catch (SQLException e) {
    e.printStackTrace();
   } finally {
    try {
     if (result != null) {
      result.close();
      result = null;
     }
     if (statement != null) {
      statement.close();
      statement = null;
     }
     if (conn != null) {
      conn.close();
      conn = null;
     }
    } catch (SQLException e) {
     e.printStackTrace();
    }
   }
   return list;
}