怎么样在公司配置服务器做网站/关键词seo深圳

概述

占位符替换, 占位符表示为：{placeholder};

示例：替换如下{xxx}占位符中的内容

"名字:{name},年龄:{age},学校:{school}"

提供了两种不同的替换方式：

1. 使用Map对占位符的内容进行替换；
2. 使用POJO对象，对占位符中的内容替换；

代码

import com.google.common.base.Strings;
import com.google.common.collect.Sets;
import org.springframework.util.CollectionUtils;
import org.springframework.util.ObjectUtils;import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;/*** Desc: 占位符替换, 占位符表示为：{@code {placeholder}}；* <p>* 示例：替换如下{xxx}占位符中的内容* <pre>"名字:{name},年龄:{age},学校:{school}"</pre>*/
public class PlaceHolderReplaceUtils {private static final Pattern pattern = Pattern.compile("\\{(.*?)\\}");private static Matcher matcher;/*** 替换字符串占位符, 字符串中使用{key}表示占位符** @param sourceString 需要匹配的字符串，示例："名字:{name},年龄:{age},学校:{school}";* @param param        参数集,Map类型* @return*/public static String replaceWithMap(String sourceString, Map<String, Object> param) {if (Strings.isNullOrEmpty(sourceString) || CollectionUtils.isEmpty(param)) {return sourceString;}String targetString = sourceString;matcher = pattern.matcher(sourceString);while (matcher.find()) {try {String key = matcher.group();String keyclone = key.substring(1, key.length() - 1).trim();Object value = param.get(keyclone);if (value != null) {targetString = targetString.replace(key, value.toString());}} catch (Exception e) {throw new RuntimeException("String formatter failed", e);}}return targetString;}/*** 替换字符串占位符, 字符串中使用{key}表示占位符* <p>* 利用反射 自动获取对象属性值 (必须有get方法)** @param sourceString 需要匹配的字符串* @param param        参数集* @return*/public static String replaceWithObject(String sourceString, Object param) {if (Strings.isNullOrEmpty(sourceString) || ObjectUtils.isEmpty(param)) {return sourceString;}String targetString = sourceString;PropertyDescriptor pd;Method getMethod;// 匹配{}中间的内容 包括括号matcher = pattern.matcher(sourceString);while (matcher.find()) {String key = matcher.group();String holderName = key.substring(1, key.length() - 1).trim();try {pd = new PropertyDescriptor(holderName, param.getClass());getMethod = pd.getReadMethod(); // 获得get方法Object value = getMethod.invoke(param);if (value != null) {targetString = targetString.replace(key, value.toString());}} catch (Exception e) {throw new RuntimeException("String formatter failed", e);}}return targetString;}/*** 查找String中的占位符keys；<br/>* 示例： "名字:{name},年龄:{age},学校:{school}"， 则返回：Set[name,age,school]* <p>* pattern示例：* <pre> {@code*  // 尖括号：<placeHolder> 表示为占位符*  Pattern pattern = Pattern.compile("\\<(.*?)\\>");**  // 大括号：{placeHolder} 表示为占位符， 上面的示例中就使用{}作为占位符*  Pattern pattern = Pattern.compile("\\{(.*?)\\}");* }* </pre>** @param sourceString* @param pattern* @return*/public static Set<String> findPlaceHolderKeys(String sourceString, Pattern pattern) {Set<String> placeHolderSet = Sets.newConcurrentHashSet();if (Strings.isNullOrEmpty(sourceString) || ObjectUtils.isEmpty(pattern)) {return placeHolderSet;}String targetString = sourceString;matcher = pattern.matcher(sourceString);while (matcher.find()) {String key = matcher.group();  //示例: {name}String placeHolder = key.substring(1, key.length() - 1).trim();  //示例： nameplaceHolderSet.add(placeHolder);}return placeHolderSet;}}

测试代码

package com.chinamobile.epic.regex;import com.google.common.collect.Maps;
import lombok.AllArgsConstructor;
import lombok.Data;
import org.junit.Test;import java.util.Map;public class PlaceHolderReplaceUtilsTest {@Testpublic void replaceWithMap() throws Exception {String sourStr = "名字:{name},{name},年龄:{age},{school},学校:{school}";Map<String, Object> map = Maps.newHashMap();map.put("name", "Tom");map.put("age", 27);map.put("school", "Beijing");String tagerStr = PlaceHolderReplaceUtils.replaceWithMap(sourStr, map);System.out.println(tagerStr);}@Testpublic void replaceWithObject() throws Exception {String sourStr = "名字:{name},{name},年龄:{age},{school},学校:{school}";Person person = new Person("ZhangSan", "Suzhou", 45);String tagerStr = PlaceHolderReplaceUtils.replaceWithObject(sourStr, person);System.out.println(tagerStr);}@Data@AllArgsConstructorpublic static class Person {private String name;private String school;private int age;}}

结果输出

名字:ZhangSan,ZhangSan,年龄:45,Suzhou,学校:Suzhou
名字:Tom,Tom,年龄:27,Beijing,学校:Beijing