使用Java替换字符串占位符的几种方法

妖狐艹你老母 2023-10-04 11:22 54阅读 0赞

import org.apache.commons.lang.text.StrSubstitutor;
    
    import java.text.MessageFormat;
    import java.util.HashMap;
    import java.util.Map;
    
    public class Test {
        
        public static void main(String[] args) {
        
       		//方法一
    		String url = "jdbc:mysql://{ip}:{port}/{tenantCode}?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&serverTimezone=Asia/Shanghai";
           String context = url.replace("{ip}", "127.0.0.1").replace("{port}", "3306").replace("{tenantCode}", "test001");
    
            System.out.println(context);
    
    		//方法二
            String url1 = "jdbc:mysql://%s:%s/%s?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&serverTimezone=Asia/Shanghai";
            String context1 = String.format(url1, "127.0.0.1", "3306", "test001");
    
            System.out.println(context1);
    
    		//方法三
            String url2 = "jdbc:mysql://{0}:{1}/{2}?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&serverTimezone=Asia/Shanghai";
            String context2 = MessageFormat.format(url2, "127.0.0.1", "3306", "test001");
    
            System.out.println(context2);
    
    		//方法四-需要引用commons-lang3或commons-text包
            Map map = new HashMap<>();
            map.put("ip", "127.0.0.1");
            map.put("port", "3306");
            map.put("tenantCode", "test001");
    		
            StrSubstitutor strSubstitutor = new StrSubstitutor(map);
            String url3 = "jdbc:mysql://${ip}:${port}/${tenantCode}?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&serverTimezone=Asia/Shanghai";
            String context3 = strSubstitutor.replace(url3);
            System.out.println(context3);
        }
    }

结果

jdbc:mysql://127.0.0.1:3306/test001?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&serverTimezone=Asia/Shanghai
    jdbc:mysql://127.0.0.1:3306/test001?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&serverTimezone=Asia/Shanghai
    jdbc:mysql://127.0.0.1:3306/test001?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&serverTimezone=Asia/Shanghai
    jdbc:mysql://127.0.0.1:3306/test001?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&serverTimezone=Asia/Shanghai