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优化代码是无止境的
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数据加载中……

JasperReports学习笔记5-其它数据生成动态的报表(WEB)



一、空数据(Empty Datasources)
就是说JRXML文件里面的内容都是静态的,直接使用
JREmptyDataSource就行了
JasperRunManager.runReportToPdfStream(reportStream,  
servletOutputStream, new HashMap(), new JREmptyDataSource());

二、Map数组(Map Datasources)
有的时候数据不一定要从数据库里面来,还有可能从Map数组里面来成生Map[]的方法

private Map[] initializeMapArray()
{
//你可以把数组里面的每个map看成一个对象,就相于数据库里面的每个字段
HashMap[] reportRows = new HashMap[4];
HashMap row1Map = new HashMap();
HashMap row2Map = new HashMap();
HashMap row3Map = new HashMap();
HashMap row4Map = new HashMap();
row1Map.put("tail_num", "N263Y");
row1Map.put("aircraft_serial", "T-11");
row1Map.put("aircraft_model", "39 ROSCOE TRNR RACER");
row1Map.put("engine_model", "R1830 SERIES");
row2Map.put("tail_num", "N4087X");
row2Map.put("aircraft_serial", "BA100-163");
row2Map.put("aircraft_model", "BRADLEY AEROBAT");
row2Map.put("engine_model", "R2800 SERIES");
row3Map.put("tail_num", "N43JE");
row3Map.put("aircraft_serial", "HAYABUSA 1");
row3Map.put("aircraft_model", "NAKAJIMA KI-43 IIIA");
row3Map.put("engine_model", "R1830 SERIES");
row4Map.put("tail_num", "N912S");
row4Map.put("aircraft_serial", "9973CC");
row4Map.put("aircraft_model", "PA18-150");
row4Map.put("engine_model", "R-1820 SER");
reportRows[0] = row1Map;
reportRows[1] = row2Map;
reportRows[2] = row3Map;
reportRows[3] = row4Map;
return reportRows;
}


生成JRMapArrayDataSource对象
private JRDataSource createReportDataSource()  
{  
JRMapArrayDataSource dataSource;  
Map[] reportRows = initializeMapArray();  
dataSource = new JRMapArrayDataSource(reportRows);  
return dataSource;  
}


三、Map集合
 
private JRDataSource createReportDataSource()
{
JRMapCollectionDataSource dataSource;
Collection reportRows = initializeMapCollection();
dataSource = new JRMapCollectionDataSource(reportRows);
return dataSource;
}
private Collection initializeMapCollection()
{
ArrayList reportRows = new ArrayList();
HashMap row1Map = new HashMap();
HashMap row2Map = new HashMap();
HashMap row3Map = new HashMap();
HashMap row4Map = new HashMap();
row1Map.put("tail_num", "N263Y");
row1Map.put("aircraft_serial", "T-11");
row1Map.put("aircraft_model", "39 ROSCOE TRNR RACER");
row1Map.put("engine_model", "R1830 SERIES");
row2Map.put("tail_num", "N4087X");
row2Map.put("aircraft_serial", "BA100-163");
row2Map.put("aircraft_model", "BRADLEY AEROBAT");
row2Map.put("engine_model", "R2800 SERIES");
row3Map.put("tail_num", "N43JE");
row3Map.put("aircraft_serial", "HAYABUSA 1");
row3Map.put("aircraft_model", "NAKAJIMA KI-43 IIIA");
row3Map.put("engine_model", "R1830 SERIES");
row4Map.put("tail_num", "N912S");
row4Map.put("aircraft_serial", "9973CC");
row4Map.put("aircraft_model", "PA18-150");
row4Map.put("engine_model", "R-1820 SER");
reportRows.add(row1Map);
reportRows.add(row2Map);
reportRows.add(row3Map);
reportRows.add(row4Map);
return reportRows;
}


JRDataSource dataSource = createReportDataSource();  
JasperRunManager.runReportToPdfStream(reportStream,  
servletOutputStream, new HashMap(), dataSource); 



四、对象数组(Java Objects as Datasources)对象JAVABEAN

private JRDataSource createReportDataSource()
{
JRBeanArrayDataSource dataSource;
AircraftData[] reportRows = initializeBeanArray();
dataSource = new JRBeanArrayDataSource(reportRows);
return dataSource;
}

private AircraftData[] initializeBeanArray()
{
AircraftData[] reportRows = new AircraftData[4];
reportRows[0] = new AircraftData("N263Y", "T-11", "39 ROSCOE TRNR
RACER", "R1830 SERIES");
reportRows[1] = new AircraftData("N4087X", "BA100-163", "BRADLEY
AEROBAT", "R2800 SERIES");
reportRows[2] = new AircraftData("N43JE", "HAYABUSA 1", "NAKAJIMA
KI-43 IIIA", "R1830 SERIES");
reportRows[3] = new AircraftData("N912S", "9973CC", "PA18-150",
"R-1820 SER");
return reportRows;
}

//最后servlet里面调用
JRDataSource dataSource = createReportDataSource();
JasperRunManager.runReportToPdfStream(reportStream,
servletOutputStream, new HashMap(), dataSource);



五、对象集合
和对象数组基本上一样,就是最后生成的是JRBeanCollectionDataSource

private JRDataSource createReportDataSource()
{
JRBeanCollectionDataSource dataSource;
Collection reportRows = initializeBeanCollection();
dataSource = new JRBeanCollectionDataSource(reportRows);
return dataSource;
}

JRDataSource dataSource = createReportDataSource();
JasperRunManager.runReportToPdfStream(reportStream,
servletOutputStream, new HashMap(), dataSource);



六、XML数据成生报表(XML as Datasource)

JRXmlDataSource xmlDataSource = new JRXmlDataSource(
new BufferedInputStream(getServletConfig().getServletContext()
.getResourceAsStream("/reports/AircraftData.xml")),
"/AircraftData/aircraft");


七、json数据源

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

        Map
<String, Object> row1 = new HashMap<String, Object>();
        Map
<String, Object> row2 = new HashMap<String, Object>();

        Map
<String, Object> row = new HashMap<String, Object>();
        row.put(
"field1""001");
        row.put(
"field2""张三");
        row.put(
"field3""中国上海");
        row.put(
"field4""field4");
        row.put(
"field5""field5");
        list.add(row);
        row 
= new HashMap<String, Object>();
        row.put(
"field1""002");
        row.put(
"field2""李四");
        row.put(
"field3""中国杭州");
        row.put(
"field4""field4");
        row.put(
"field5""field5");
        list.add(row);
        row 
= new HashMap<String, Object>();
        row.put(
"field1""003");
        row.put(
"field2""王五");
        row.put(
"field3""中国南昌");
        row.put(
"field4""field4");
        row.put(
"field5""field5");
        list.add(row);

        row2.put(
"uAnswer", list);
        row1.put(
"qNaire", row2);

        JSONObject jsonObject 
= JSONObject.fromObject(row1);
        String json 
= jsonObject.toString();

        Map
<String, Object> jasperPara = new HashMap<String, Object>();
        jasperPara.put(
"TITLE""json数据报表演示样例(20131012)");
        InputStream is 
= new ByteArrayInputStream(json.getBytes());
        jasperPara.put(
"JSON_INPUT_STREAM", is);
        jasperPara.put(JsonQueryExecuterFactory.JSON_LOCALE, Locale.CHINA);
        jasperPara.put(JRParameter.REPORT_LOCALE, Locale.CHINA);

 


json数据
    {"qNaire"{
          
"uAnswer": [
            
{
              
"field1""001",    
              
"field2""张三",    
              
"field3""中国上海",    
              
"field4""field4",
              
"field5""field5",
            }
,
            
{
              
"field1""002",
              
"field2""李四",
              
"field3""中国杭州",
              
"field4""field4",
              
"field5""field5",
            }
,
            
{
              
"field1""003",
              
"field2""王五",
              
"field3""中国南昌",
              
"field4""field4",
              
"field5""field5",
          }

          ]
        }
}


ireport配置截图:
















posted on 2013-10-15 16:07 lanjh 阅读(438) 评论(0)  编辑  收藏 所属分类: 报表


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