HtmlGenerator-HTML表格等生成器

使用方法

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HTMLGenerator htmlGenerator = new HTMLGenerator(traceHeaderVOs);
htmlGenerator.put("XXX", "表头名"); //XXX属性名
...
htmlGenerator.generateTable();

源码

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import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * @Description HTML生成器
 * @author XX
 * @Param 
 * @return 
**/
public class HTMLGenerator extends LinkedHashMap<String, String> {
	
	private static final long serialVersionUID = -2844894776581720941L;
	
	/**
	 * 生成数据集合
	 */
	private Collection<?> collection;

	public HTMLGenerator(Collection<?> collection) {
		super();
		this.collection = collection;
	}

//	private static HTMLGenerator htmlGenerator;
//	
//	public static synchronized HTMLGenerator getInstance(Collection<?> collection) {
//		if(htmlGenerator == null) {
//			htmlGenerator = new HTMLGenerator();
//		}
//		htmlGenerator.setCollection(collection);
//		return htmlGenerator;
//	}
	
	public Collection<?> getCollection() {
		return collection;
	}

	public void setCollection(Collection<?> collection) {
		this.collection = collection;
	}

	/**
	 * 默认表格样式
	 */
	private static final String DEFAULT_TABLE_STYLE = "<style>.pure-table{text-align:center;border-collapse:collapse;border-spacing:0;empty-cells:show;border:1px solid #cbcbcb}.pure-table caption{color:#000;font:italic 85%/1 arial,sans-serif;padding:1em 0;text-align:center}.pure-table td,.pure-table th{border-left:1px solid #cbcbcb;border-width:0 0 0 1px;font-size:inherit;margin:0;overflow:visible;padding:.5em 1em}.pure-table thead{background-color:#e0e0e0;color:#000;text-align:left;vertical-align:bottom}.pure-table td{background-color:transparent}</style>";
	
	/**
	 * 附加样式
	 */
	public String style = "";
	
	public String generateTable() {
		return generateTable(null, null, null);
	}
	
	public String generateTable(String tableStyle) {
		return generateTable(tableStyle, null, null);
	}
	
	/**
	 * 生成HTML表格
	 * @param tableStyle 表格样式 example "<table style=\"text-align:center;\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\">"
	 * @param columnsStyles 指定某列样式 
	 * @param cellStyles 指定某个单元格列样式
	 * @return
	 */
	public String generateTable(String tableStyle, Map<Integer,String> columnsStyles,  Map<Integer,RowColumnPair> cellStyles) {
		//TODO columnsStyle
		//TODO cellStyles
		StringBuilder content = new StringBuilder();
		content.append(DEFAULT_TABLE_STYLE);
		if(tableStyle == null) {
			content.append("<table class=\"pure-table\">");
		} else {
			content.append(tableStyle);
		}
		//表头创建
		content.append("<tr>");
		for(String key:this.keySet()) {
			content.append("<td><h4>").append(get(key)).append("</h4>");
		}
		content.append("</tr>");
		//表体创建
		int row = 0;
		for(Object element : collection) {
			content.append("<tr>");
			for(String key:this.keySet()) {
				content.append("<td>").append(getFieldValueByName(element, key)).append("</td>");
			}
			content.append("</tr>");
			row++;
		}
		content.append("</table>");
		return content.toString();
	}
	
	/**
	 * 通过反射获取参数对应的属性值
	 * @param o 对象
	 * @param fieldName 字段名
	 * @return
	 */
	private String getFieldValueByName(Object o, String fieldName) {
        try {
        	PropertyDescriptor pd = new PropertyDescriptor(fieldName, o.getClass());
            Method getMethod = pd.getReadMethod();
            Object obj = getMethod.invoke(o);
            return null == obj ? null : obj.toString(); 
        } catch (Exception e) {
        	return null;
		}

    }
	
	/**
	 * 用于定位表格单元格
	 * @author XX
	 *
	 */
	public class RowColumnPair {
		/**
		 * 属性名
		 */
		private String columnField;

		/**
		 * 样式
		 */
		private String style;

		public RowColumnPair(String columnField, String style) {
			super();
			this.columnField = columnField;
			this.style = style;
		}

		public String getColumnField() {
			return columnField;
		}

		public void setColumnField(String columnField) {
			this.columnField = columnField;
		}

		public String getStyle() {
			return style;
		}

		public void setStyle(String style) {
			this.style = style;
		}
		
	}
	
}