htmlbuilder.java

ecside jsp前途分页的标签 实现ajax 增删改查等

/*
 * Copyright 2004 original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.ecside.util;

import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.ecside.common.log.LogHandler;

/**
 * Will build up an Html String piece by piece.
 * 
 * Note: unless otherwise noted if the parameter used for any of the methods is 
 * null or empty then that html element will not be appended. The advantage of this
 * is you do not have to do any null or empty string checking to use this class.
 * 
 * @author Jeff Johnston
 */
public class HtmlBuilder {
	
	private Log logger = LogFactory.getLog(HtmlBuilder.class);
	
    private Writer writer;

    /**
     * Default constructor using a StringWriter, 
     * which is really just a StringBuffer. 
     */
    public HtmlBuilder() {
        this.writer = new StringWriter();
    }

    /**
     * A builder with the specified Writer.
     * 
     * @param writer The Writer to use.
     */
    public HtmlBuilder(Writer writer) {
        this.writer = writer;
    }

    /**
     * Flush the writer. 
     */
    public void flushBuilder() {
        try {
            writer.flush();
        } catch (IOException e) {
        	LogHandler.errorLog(logger, e);
        }
    }

    /**
     * Close the writer. 
     */
    public void closeBuilder() {
        try {
            writer.close();
        } catch (IOException e) {
        	LogHandler.errorLog(logger, e);
        }
    }

    /**
     * Write out the content to the internal writer. 
     */
    private HtmlBuilder write(String text) {
        try {
            writer.write(text);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return this;
    }

    /**
     * The length of the internal Writer. 
     */
    public int length() {
        return writer.toString().length();
    }

    /**
     * The Object to append. Will call the Object's toString() method.
     */
    public HtmlBuilder append(Object text) {
        if (text != null) {
            write(text.toString());
        }

        return this;
    }

    /**
     * The String to append.
     */
    public HtmlBuilder append(String text) {
        write(text);

        return this;
    }

    /**
     * <p>Append tabs [\t] and newlines [\n].</p>
     * 
     * @param tabs The number of tab spaces \t to put in.
     * @param newlines The number of newlines \n to put in.
     */
    public HtmlBuilder format(int tabs, int newlines) {
        tabs(tabs);
        newlines(newlines);

        return this;
    }

    /**
     * <p>Append tabs.</p>
     * 
     * @param tabs The number of tab spaces [\t] to put in.
     */
    public HtmlBuilder tabs(int tabs) {
        for (int i = 0; i < tabs; i++) {
            tab();
        }

        return this;
    }

    /**
     * <p>Append newlines [\n].</p>
     * 
     * @param newlines The number of newlines \n to put in.
     */
    public HtmlBuilder newlines(int newlines) {
        for (int i = 0; i < newlines; i++) {
            newline();
        }

        return this;
    }

    /**
     * <p>Append tab [\t].</p>
     */
    public HtmlBuilder tab() {
        write("\t");

        return this;
    }

    /**
     * <p>Append newline [\n].</p>
     */
    public HtmlBuilder newline() {
        write("\n");

        return this;
    }

    /**
     * <p>Close the element [>]</p>
     */
    public HtmlBuilder close() {
        write(">");
        
        return this;
    }
    
    /**
     * <p>Close the element with a slash to comply with xhtml [/>]</p>
     */
    public HtmlBuilder xclose() {
        write("/>");

        return this;
    }

    /**
     * <p>The start of the table element [<table].</p> 
     * 
     * <p>
     * Also appends a newline [\n] and the specified number of tabs [\t]
     * before the table.
     * </p>
     * 
     * @param tabs The number of tab spaces [\t] to put in.
     */
    public HtmlBuilder table(int tabs) {
        newline();
        tabs(tabs);
        write("<table");

        return this;
    }

    /**
     * <p>The close tag of the table element [</table>].</p> 
     * 
     * <p>
     * Also appends a newline [\n] and the specified number of tabs [\t]
     * before the table ends.
     * </p>
     * 
     * @param tabs The number of tab spaces [\t] to put in.
     */
    public HtmlBuilder tableEnd(int tabs) {
        newline();
        tabs(tabs);
        write("</table>");

        return this;
    }

    /**
     * <p>The start of the button element [<button].</p> 
     */
    public HtmlBuilder button() {
        write("<button");
        return this;
    }

    /**
     * <p>The close tag of the button element [</button>].</p> 
     */
    public HtmlBuilder buttonEnd() {
        write("</button>");

        return this;
    }

    /**
     * <p>The start of the tr element [<tr].</p> 
     * 
     * <p>
     * Also appends a newline [\n] and the specified number of tabs [\t]
     * before the tr.
     * </p>
     * 
     * @param tabs The number of tab spaces [\t] to put in.
     */
//    public HtmlBuilder tr(int tabs) {
//        newline();
//        tabs(tabs);
//        write("<tr");
//
//        return this;
//    }
    public HtmlBuilder tr(int tabs) {
//        newline();
//        tabs(tabs);
        write("<tr");
        return this;
    }
    /**
     * <p>The close tag of the tr element [</tr>].</p> 
     * 
     * <p>
     * Also appends a newline [\n] and the specified number of tabs [\t]
     * before the tr ends.
     * </p>
     * 
     * @param tabs The number of tab spaces [\t] to put in.
     */
//    public HtmlBuilder trEnd(int tabs) {
//        newline();
//        tabs(tabs);
//        write("</tr>");
//
//        return this;
//    }
  public HtmlBuilder trEnd(int tabs) {
  write("</tr>");
  return this;
}
    /**
     * <p>The start of the th element [<th].</p> 
     * 
     * <p>
     * Also appends a newline [\n] and the specified number of tabs [\t]
     * before the th.
     * </p>
     * 
     * @param tabs The number of tab spaces [\t] to put in.
     */
    public HtmlBuilder th(int tabs) {
        newline();
        tabs(tabs);
        write("<th");

        return this;
    }

    /**
     * <p>The close tag of the th element [</th>].</p> 
     */
    public HtmlBuilder thEnd() {
        write("</th>");

        return this;
    }

    /**
     * <p>The start of the td element [<td].</p> 
     * 
     * <p>
     * Also appends a newline [\n] and the specified number of tabs [\t]
     * before the td.
     * </p>
     * 
     * @param tabs The number of tab spaces [\t] to put in.
     */
//    public HtmlBuilder td(int tabs) {
//        newline();
//        tabs(tabs);
//        write("<td");
//
//        return this;
//    }
    
  public HtmlBuilder td(int tabs) {
	  write("<td");
	  return this;
  }

    /**
     * <p>The close tag of the td element [</td>].</p> 
     */
    public HtmlBuilder tdEnd() {
        write("</td>");
        return this;
    }

    /**
     * <p>The start of the input element [<input].</p> 
     */
    public HtmlBuilder input() {
        write("<input");

        return this;
    }
    
    /**
     * <p>The type attribute [type=].</p> 
     */
    public HtmlBuilder type(String type) {
        if (StringUtils.isNotBlank(type)) {
            write(" type=\"").write(type).write("\" ");
        }

        return this;
    }

    /**
     * <p>Combines the start of the input element and the 
     * type attribute [<input type=].
     * </p> 
     */
    public HtmlBuilder input(String type) {
        write("<input type=\"").write(type).write("\" ");

        return this;
    }

    /**
     * <p>The start of the select element [<select].</p> 
     */
    public HtmlBuilder select() {
        write("<select");

        return this;
    }

    /**
     * <p>The close tag of the select element [</select>].</p> 
     */
    public HtmlBuilder selectEnd() {
        write("</select>");

        return this;
    }

    /**
     * <p>The start of the option element [<option].</p> 
     */
    public HtmlBuilder option() {
        write("<option");

        return this;
    }

    /**
     * <p>The close tag of the option element [</option>].</p> 
     */
    public HtmlBuilder optionEnd() {
        write("</option>");

        return this;
    }

    /**
     * <p>The start of the form element [<form].</p> 
     * 
     * <p>Also appends a newline [\n] before the form.</p>
     */
    public HtmlBuilder form() {
        newline();
        write("<form");

        return this;
    }

    /**
     * <p>The close tag of the form element [</form>].</p>
     *  
     * <p>Also appends a newline [\n] before the end.</p>
     */
    public HtmlBuilder formEnd() {
        newline();
        write("</form>");

        return this;
    }

    /**
     * <p>The name attribute [name=].</p> 
     */
    public HtmlBuilder name(String name) {
        if (StringUtils.isNotBlank(name)) {
            write(" name=\"").write(name).write("\" ");
        }

        return this;
    }

    /**
     * <p>The value attribute [value=].</p>
     *  
     * <p>If the value parameter is null or empty then
     * will append a empty value element.</p>
     */
    public HtmlBuilder value(String value) {
        if (StringUtils.isNotBlank(value)) {
            write(" value=\"").write(value).write("\" ");
        } else {
            write(" value=\"").write("\" ");
        }

        return this;
    }

    /**
     * <p>The title attribute [title=].</p> 
     */
    public HtmlBuilder title(String title) {
        if (StringUtils.isNotBlank(title)) {
            write(" title=\"").write(title).write("\" ");
        }

        return this;
    }

    /**
     * <p>The action attribute [action=].</p> 
     */
    public HtmlBuilder action(String action) {
        write(" action=\"");
        if (StringUtils.isNotBlank(action)) {
            write(action);
        }
        write("\" ");

        return this;
    }

    /**
     * <p>The method attribute [method=].</p> 
     */
    public HtmlBuilder method(String method) {
        if (StringUtils.isNotBlank(method)) {
            write(" method=\"").write(method).write("\" ");
        }

        return this;
    }

    /**
     * <p>The enctype attribute [enctype=].</p> 
     */
    public HtmlBuilder enctype(String enctype) {
        if (StringUtils.isNotBlank(enctype)) {
            write(" enctype=\"").write(enctype).write("\" ");
        }

        return this;
    }

    /**
     * <p>The onchange attribute [onchange=].</p> 
     */
    public HtmlBuilder onchange(String onchange) {
        if (StringUtils.isNotBlank(onchange)) {
            write(" onchange=\"").write(onchange).write("\" ");
        }

        return this;
    }

    /**
     * <p>The onsubmit attribute [onsubmit=].</p> 
     */
    public HtmlBuilder onsubmit(String onsubmit) {
        if (StringUtils.isNotBlank(onsubmit)) {
            write(" onsubmit=\"").write(onsubmit).write("\" ");
        }

        return this;
    }

    /**
     * <p>The onclick attribute [onclick=].</p> 
     */
    public HtmlBuilder onclick(String onclick) {
        if (StringUtils.isNotBlank(onclick)) {
            write(" onclick=\"").write(onclick).write("\" ");
        }

        return this;
    }

    /**
     * <p>The ondblclick attribute [ondblclick=].</p> 
     */
    public HtmlBuilder ondblclick(String ondblclick) {
        if (StringUtils.isNotBlank(ondblclick)) {
            write(" ondblclick=\"").write(ondblclick).write("\" ");
        }

        return this;
    }
    
    /**
     * <p>The onmouseover attribute [onmouseover=].</p> 
     */
    public HtmlBuilder onmouseover(String onmouseover) {
        if (StringUtils.isNotBlank(onmouseover)) {
            write(" onmouseover=\"").write(onmouseover).write("\" ");
        }

        return this;
    }

    /**
     * <p>The onmouseout attribute [onmouseout=].</p> 
     */
    public HtmlBuilder onmouseout(String onmouseout) {
        if (StringUtils.isNotBlank(onmouseout)) {
            write(" onmouseout=\"").write(onmouseout).write("\" ");
        }

        return this;
    }

    public HtmlBuilder tagAttributes(String tagAttributes) {
        if (StringUtils.isNotBlank(tagAttributes)) {
            write(" ").write(tagAttributes).write(" ");
        }

        return this;
    }
    /**
     * <p>The onkeypress attribute [onkeypress=].</p> 
     */
    public HtmlBuilder onkeypress(String onkeypress) {
        if (StringUtils.isNotBlank(onkeypress)) {
            write(" onkeypress=\"").write(onkeypress).write("\" ");
        }

        return this;
    }

    /**
     * <p>The id attribute [id=].</p> 
     */
    public HtmlBuilder id(String id) {
        if (StringUtils.isNotBlank(id)) {
            write(" id=\"").write(id).write("\" ");
        }

        return this;
    }

    /**
     * <p>The class attribute [class=].</p> 
     */
    public HtmlBuilder styleClass(String styleClass) {
        if (StringUtils.isNotBlank(styleClass)) {
            write(" class=\"").write(styleClass).write("\" ");
        }

        return this;
    }

    /**
     * <p>The style attribute [style=].</p> 
     */
    public HtmlBuilder style(String style) {
        if (StringUtils.isNotBlank(style)) {
            write(" style=\"").write(style).write("\" ");
        }

        return this;
    }

    /**
     * <p>The width attribute [width=].</p> 
     */
    public HtmlBuilder width(String width) {
        if (StringUtils.isNotBlank(width)) {
            write(" width=\"").write(width).write("\" ");
        }

        return this;
    }
    public HtmlBuilder height(String height) {