02-计算字符串的实际长度（字符串处理）

来源：互联网发布：js 字符串在数组中编辑：程序博客网时间：2024/06/07 08:51

StringUtil.java

package com.lh.bean;public class StringUtil {// 需要计算长度的字符串private String str;// 字符串的实际长度private int strLength;public String getStr() {return str;}public void setStr(String str) {this.str = str;}public int getStrLength() {// 将字符串转换为字符数组char[] c = str.toCharArray();// 用于保存每个字符的实际长度int factualLength = 0;for (int i = 0; i < c.length; i++) {// 获取字节数组的长度factualLength = String.valueOf(c[i]).getBytes().length;// 当程序编码为UTF-8时，汉字实际的字节长度为3if (factualLength == 3) {// 此处将字节长度改为2factualLength = 2;}// 将每个字符的长度累加，结果就是字符串的总长度strLength += factualLength;}return strLength;}public void setStrLength(int strLength) {this.strLength = strLength;}}

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><html><head><title>My JSP 'index.jsp' starting page</title></head><body><form action="getlength.jsp" method="post"><table><tr height="35"><td align="center">请输入字符串：</td><td><input type="text" name="str" /></td><td align="center"><input type="submit" value="提交" /></td></tr></table></form></body></html>

getlength.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><html><head><title>My JSP 'getlength.jsp' starting page</title></head><body><%request.setCharacterEncoding("UTF-8");String str = request.getParameter("str");%><jsp:useBean id="strBean" class="com.lh.bean.StringUtil"></jsp:useBean><jsp:setProperty property="str" name="strBean" value="<%=str %>" /><table><tr><td>字符串：</td><td align="left"><jsp:getProperty property="str" name="strBean" /></td></tr><tr><td>实际长度：</td><td><jsp:getProperty property="strLength" name="strBean" /></td></tr></table></body></html>