此类中收集Java编程中WEB开发常用到的一些工具。比如字符串的查找替换操作、将字符串中的特殊字符转换成Web页中可以安全显示的字符串，转换字符串，从UTF-8到GBK的编码转换，从“GBK”到“ISO8859_1”的字符串转换，大文本块处理(将字符集转成ISO)，String型变量转换成int型变量，如果str不可以转换成int型数据，返回-1表示异常,否则返回转换后的值，long型变量转换成String型变量，sql语句 处理，如果longVal不可以转换成String型数据，返回空值表示异常,否则返回转换后的值等操作-Some of these were collected in the Java programming tools used to develop WEB. For example, the search string replacement operation in a string of special characters into a Web page String conversion can be safely displayed, encoding conversion from UTF-8 to GBK from " GBK"　to " ISO8859_1"　the string conversion, large blocks of text processing (convert character sets ISO), String type variable into a variable of type int, if str int data type can not be converted, return-1 indicates an exception, otherwise the value returned after conversion, long type variable into String variable, sql statement processing, if the value can not be converted into longVal String data type, returns a null value represents an exception, otherwise return after conversion and other operations