HTML form Utilites : HTML Output « Servlets « Java
HTML form Utilites
//Revised from open ejb
public class HtmlUtilities {
public static final String ANCHOR_NAME_TYPE = "name";
public static final String ANCHOR_HREF_TYPE = "href";
//we don't want anyone creating new instances of this class
private HtmlUtilities() {
}
public static String createAnchor(String value, String display, String type) {
//our type must be one of these two
if (!(ANCHOR_HREF_TYPE.equals(type) || ANCHOR_NAME_TYPE.equals(type))) {
throw new IllegalArgumentException("The type argument must be either \"name\" or \"href\"");
}
return new StringBuffer(100)
.append("<a ")
.append(type)
.append("=\"")
.append(value)
.append("\">")
.append(display)
.append("</a>")
.toString();
}
public static String createSelectFormField(String name, String onChange) {
StringBuffer temp = new StringBuffer(60).append("<select name=\"").append(name);
if (onChange != null) {
temp.append("\" onChange=\"").append(onChange);
}
return temp.append("\">").toString();
}
public static String createSelectOption(String value, String display, boolean selected) {
StringBuffer temp = new StringBuffer(65).append("<option value=\"").append(value).append("\"");
if (selected) {
temp.append(" selected");
}
return temp.append(">").append(display).append("</option>").toString();
}
public static String createTextFormField(String name, String value, int size, int maxLength) {
return createInputFormField("text", name, value, size, maxLength, null, null, null, null, false, false, false);
}
public static String createFileFormField(String name, String value, int size) {
return createInputFormField("file", name, value, size, 0, null, null, null, null, false, false, false);
}
public static String createHiddenFormField(String name, String value) {
return createInputFormField("hidden", name, value, 0, 0, null, null, null, null, false, false, false);
}
public static String createSubmitFormButton(String name, String value) {
return createInputFormField("submit", name, value, 0, 0, null, null, null, null, false, false, false);
}
public static String createInputFormField(
String type,
String name,
String value,
int size,
int maxLength,
String onFocus,
String onBlur,
String onChange,
String onClick,
boolean checked,
boolean disabled,
boolean readOnly) {
StringBuffer temp = new StringBuffer(150)
.append("<input type=\"")
.append(type)
.append("\" name=\"")
.append(name)
.append("\" value=\"")
.append(value)
.append("\"");
if (size > 0) {
temp.append(" size=\"").append(size).append("\"");
}
if (maxLength > 0) {
temp.append(" maxlength=\"").append(maxLength).append("\"");
}
if (onFocus != null) {
temp.append(" onfocus=\"").append(onFocus).append("\"");
}
if (onBlur != null) {
temp.append(" onblur=\"").append(onBlur).append("\"");
}
if (onChange != null) {
temp.append(" onchange=\"").append(onChange).append("\"");
}
if (onClick != null) {
temp.append(" onclick=\"").append(onClick).append("\"");
}
if (checked) {
temp.append(" checked");
}
if (disabled) {
temp.append(" disabled");
}
if (readOnly) {
temp.append(" readonly");
}
return temp.append(">").toString();
}
public static String createTextArea(
String name,
String content,
int rows,
int columns,
String onFocus,
String onBlur,
String onChange) {
StringBuffer temp = new StringBuffer(50);
temp.append("<textarea name=\"").append(name).append("\" rows=\"").append(rows).append("\" cols=\"").append(
columns).append(
"\"");
if (onFocus != null) {
temp.append(" onfocus=\"").append(onFocus).append("\"");
}
if (onBlur != null) {
temp.append(" onblur=\"").append(onBlur).append("\"");
}
if (onChange != null) {
temp.append(" onchange=\"").append(onChange).append("\"");
}
return temp.append(">").append(content).append("</textarea>").toString();
}
}
