JasperReports学习笔记5-其它数据生成动态的报表（WEB）

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：