jspruntimelibrary.java

JspRuntime自动填充机制；向对jsp深入了解的可以

					new PrivilegedIntrospectEncodingHelper(
						bean,
						prop,
						value,
						request,
						param,
						ignoreMethodNF,
						sourceEncoding,
						targetEncoding);
				AccessController.doPrivileged(dp);
			} catch (PrivilegedActionException pe) {
				Exception e = pe.getException();
				throw (JasperException) e;
			}
		} else {
			internalIntrospecthelper(
				bean,
				prop,
				value,
				request,
				param,
				ignoreMethodNF,
				sourceEncoding,
				targetEncoding);
		}
	}


	/**
	 * Bean 属性设置的实现(可转换字符集编码版本).
	 *
	 * @param bean
	 * @param prop 属性名称
	 * @param value
	 * @param request
	 * @param param 表单参数名称
	 * @param ignoreMethodNF
	 * @param sourceEncoding ServeltRequest 的源字符编码名称(如果为空, 则默认为 ISO8859-1)
	 * @param targetEncoding 目标字符集(可实现中文化处理, 则此参数应该为 "GB2312" 或者 "GBK")
	 *
	 * @throws JasperException
	 */
	private static void internalIntrospecthelper(
		Object bean,
		String prop,
		String value,
		ServletRequest request,
		String param,
		boolean ignoreMethodNF,
		String sourceEncoding,
		String targetEncoding
		)
		throws JasperException {
		java.lang.reflect.Method method = null;
		Class type = null;
		Class propertyEditorClass = null;
		try {
			// 从 Bean 中解析属性信息并查找相关的 write 方法
			java.beans.BeanInfo info =
				java.beans.Introspector.getBeanInfo(bean.getClass());
			if (info != null) {
				java.beans.PropertyDescriptor pd[] =
					info.getPropertyDescriptors();
				for (int i = 0; i < pd.length; i++) {
					if (pd[i].getName().equals(prop)) {
						method = pd[i].getWriteMethod();// write 方法
						type = pd[i].getPropertyType();// 属性类型
						propertyEditorClass = pd[i].getPropertyEditorClass();// 属性编辑器类型
						break;
					}
				}
			}
			if (method != null) {
				if (type.isArray()) {
					if (request == null) {
						throw new JasperException(
							Constants
							.getString(
								"jsp.error.beans.setproperty.noindexset",
								new Object[] {
						}));
					};
					Class t = type.getComponentType();
					// 从 servlet 读取参数(此处应该加入字符集处理机制)
					String[] values = request.getParameterValues(param);
					//XXX Please check.
					if (values == null) {
						return;
					} else {
						// TODO: 字符集转换 - Added by BeanSoft Studio on 2004-04-06
						if(sourceEncoding != null && targetEncoding != null
						  && targetEncoding.length() > 0) {
							for(int i = 0; i < values.length; i++) {
								values[i] = new String(values[i].getBytes(
									sourceEncoding), targetEncoding);
							}
						}
					}

					if (t.equals(String.class)) {
						method.invoke(bean, new Object[] { values });
					} else {
						Object tmpval = null;
						createTypedArray(
							prop,
							bean,
							method,
							values,
							t,
							propertyEditorClass);
					}
				} else {
					if (value == null || (param != null && value.equals("")))
						return;
					// 进行类型转换
					Object oval =
						convert(prop, value, type, propertyEditorClass);
					// 转换失败不赋值
					if (oval != null)
						method.invoke(bean, new Object[] { oval });
				}
			}
		} catch (Exception ex) {
			ex.printStackTrace();
			throw new JasperException(ex);
		}
		if (!ignoreMethodNF && (method == null)) {
			if (type == null) {
				throw new JasperException(
					Constants.getString(
						"jsp.error.beans.noproperty",
						new Object[] { prop, bean.getClass().getName()}));
			} else {
				throw new JasperException(
					Constants.getString(
						"jsp.error.beans.nomethod.setproperty",
						new Object[] { prop, bean.getClass().getName()}));
			}
		}
	}
	// __end introspecthelperMethod

	//-------------------------------------------------------------------
	// functions to convert builtin Java data types to string.
	//-------------------------------------------------------------------
	// __begin toStringMethod
	public static String toString(Object o) {
		return (o == null) ? "" : o.toString();
	}

	public static String toString(byte b) {
		return new Byte(b).toString();
	}

	public static String toString(boolean b) {
		return new Boolean(b).toString();
	}

	public static String toString(short s) {
		return new Short(s).toString();
	}

	public static String toString(int i) {
		return new Integer(i).toString();
	}

	public static String toString(float f) {
		return new Float(f).toString();
	}

	public static String toString(long l) {
		return new Long(l).toString();
	}

	public static String toString(double d) {
		return new Double(d).toString();
	}

	public static String toString(char c) {
		return new Character(c).toString();
	}
	// __end toStringMethod

	/**
	 * Create a typed array.
	 * This is a special case where params are passed through
	 * the request and the property is indexed.
	 */
	public static void createTypedArray(
		String propertyName,
		Object bean,
		Method method,
		String[] values,
		Class t,
		Class propertyEditorClass)
		throws JasperException {
		try {
			if (propertyEditorClass != null) {
				Object[] tmpval = new Integer[values.length];
				for (int i = 0; i < values.length; i++) {
					tmpval[i] =
						getValueFromBeanInfoPropertyEditor(
							t,
							propertyName,
							values[i],
							propertyEditorClass);
				}
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(Integer.class)) {
				Integer[] tmpval = new Integer[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = new Integer(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(Byte.class)) {
				Byte[] tmpval = new Byte[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = new Byte(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(Boolean.class)) {
				Boolean[] tmpval = new Boolean[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = new Boolean(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(Short.class)) {
				Short[] tmpval = new Short[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = new Short(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(Long.class)) {
				Long[] tmpval = new Long[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = new Long(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(Double.class)) {
				Double[] tmpval = new Double[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = new Double(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(Float.class)) {
				Float[] tmpval = new Float[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = new Float(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(Character.class)) {
				Character[] tmpval = new Character[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = new Character(values[i].charAt(0));
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(int.class)) {
				int[] tmpval = new int[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = Integer.parseInt(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(byte.class)) {
				byte[] tmpval = new byte[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = Byte.parseByte(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(boolean.class)) {
				boolean[] tmpval = new boolean[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = (Boolean.valueOf(values[i])).booleanValue();
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(short.class)) {
				short[] tmpval = new short[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = Short.parseShort(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(long.class)) {
				long[] tmpval = new long[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = Long.parseLong(values[i]);
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(double.class)) {
				double[] tmpval = new double[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = Double.valueOf(values[i]).doubleValue();
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(float.class)) {
				float[] tmpval = new float[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = Float.valueOf(values[i]).floatValue();
				method.invoke(bean, new Object[] { tmpval });
			} else if (t.equals(char.class)) {
				char[] tmpval = new char[values.length];
				for (int i = 0; i < values.length; i++)
					tmpval[i] = values[i].charAt(0);
				method.invoke(bean, new Object[] { tmpval });
			} else {
				Object[] tmpval = new Integer[values.length];
				for (int i = 0; i < values.length; i++) {
					tmpval[i] =
						getValueFromPropertyEditorManager(
							t,
							propertyName,
							values[i]);
				}
				method.invoke(bean, new Object[] { tmpval });
			}
		} catch (Exception ex) {
			throw new JasperException("error in invoking method");
		}
	}

	/**
	 * Escape special shell characters.
	 * @param unescString The string to shell-escape
	 * @return The escaped shell string.
	 */

	public static String escapeQueryString(String unescString) {
		if (unescString == null)
			return null;

		String escString = "";
		String shellSpChars = "&;`'\"|*?~<>^()[]{}$\\\n";

		for (int index = 0; index < unescString.length(); index++) {
			char nextChar = unescString.charAt(index);

			if (shellSpChars.indexOf(nextChar) != -1)
				escString += "\\";

			escString += nextChar;
		}
		return escString;
	}

	/**
	 * Decode an URL formatted string.
	 * @param s The string to decode.
	 * @return The decoded string.
	 */

	public static String decode(String encoded) {
		// speedily leave if we're not needed
		if (encoded == null)
			return null;
		if (encoded.indexOf('%') == -1 && encoded.indexOf('+') == -1)
			return encoded;

		//allocate the buffer - use byte[] to avoid calls to new.
		byte holdbuffer[] = new byte[encoded.length()];

		char holdchar;
		int bufcount = 0;

		for (int count = 0; count < encoded.length(); count++) {
			char cur = encoded.charAt(count);
			if (cur == '%') {