java提取字符串

[章耿(余淮)]

java提取字符串

字段如下:

[IMG height=50 src="/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319576.gif" width=50 border=0]文字文字111111
[IMG height=55 src="/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319577.gif" width=70 border=0]文字文字22222222222


字段如上 有多个 要求提取类似/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319577.gif 的字段为String数组1! 提取文字为String数组2

用方法或者正则都可以 先谢谢大家了!

[fanql_222]

对每个字符串字段
String str = string.substring(string.indexOf("\"")+1,string.lastIndexOf("\""));

[cocosunshine]

如果是servlet的话，你使用request.getQueryString就可以把url后面的路径，如果你要取参数的话用request.getParameter就可以了。。如果你想是字符串处理，方法有很多split，indexOf。。

[kekeemx]

这个好像是HTML页面的部分代码.如果楼主不嫌麻烦的话可以使用STRING类提供的indexof的那两个方法(参数不同的那2个)和substring等API已经
提供的方法进行拼接字符串并存入数组.但是我现在是使用的HTTPCLIENT这个第三方开源项目他提供了很方便完整的HTML页面解析方法.这样楼主的
要求可以很简单的实现,但是需要导入第三方JAR文件.而且代码就依赖于这个JAR了.所以怎么做就取决于楼主的实际情况了.

[seaforce]

/**
 * project_name: Test
 * package_name: CSDN_Test_20071126
 * package_declaration: package CSDN_Test_20071126;
 * filename: StringDisposalTest.java
 * author: yuhaiming
 * date: 2007-11-26
 */
package CSDN_Test_20071126;
/**
 * [IMG   height=50   src="/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319576.gif"   width=50   border=0]文字文字111111 
   [IMG   height=55   src="/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319577.gif"   width=70   border=0]文字文字222222
   要求提取类似/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319577.gif   的字段为String数组1!     提取文字为String数组2
 * @author yuhaiming
 *
 */
public class StringDisposalTest {
	/**
	 * 主处理
	 */
	public static void disposal(){
		//假设两个吧，你可以将数据库中的字段取出来放到List中，再对每一个元素进行处理
		String[] sourceString = {"[IMG   height=50   src=\"/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319576.gif\"   width=50   border=0]文字文字111111",
				"[IMG   height=55   src=\"/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319577.gif\"   width=70   border=0]文字文字222222"};
		String[] srcString = new String[2];
		String[] charString = new String[2];
		for(int i=0;i<sourceString.length;i++){
			int srcStart = sourceString[i].indexOf("src=\"")+"src=\"".length();
			int srcEnd = sourceString[i].substring(srcStart).indexOf(" ")+srcStart;
			srcString[i]=sourceString[i].substring(srcStart,srcEnd-1);
			int charStart = sourceString[i].indexOf("]", 1);
			charString[i]=sourceString[i].substring(charStart+1);
		}
		display(srcString,"路径");
		display(charString,"文字");
	}
	public static void display(String[] str,String att){
		System.out.println(att+":");
		for(int i=0;i<str.length;i++){
			System.out.println(str[i]);
		}
		
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		disposal();
	}

}

[fanql_222]

有高手用正则写吗？学习

[Clesome_VC]

我写了个简单的正则

package zjq;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author ZhaoJiqing
 *
 */
public class Regex {
	static final String regexStr = "src=\"[a-zA-Z0-9/.?=]+\"";
	public static void main(String args[])
	{
		Regex r = new Regex();
		String string = "[IMG   height=50   src=\"/SYSTEM/bos/padownload.jsp?ftpPath"
			+"=/upImg/9911938308140319576.gif\"   width=50   border=0]文字文字111111 "
			+"[IMG   height=55   src=\"/SYSTEM/bos/padownload.jsp?ftpPath"
			+"=/upImg/9911938308140319577.gif\"   width=70   border=0]文字文字22222222222";
		r.doRegex(Regex.regexStr,string);
	}
	
	public void doRegex(String regexString,String string)
	{
		Pattern pattern = Pattern.compile(regexString);
		Matcher matcher = pattern.matcher(string);
		System.out.println(matcher.groupCount());
		List<String> strs = new ArrayList<String>();
		while(matcher.find())
		{
			String srcStr = matcher.group();
			String printStr = srcStr.substring(5,srcStr.length()-1);
			strs.add(printStr);
		}
		String[] ss = new String[strs.size()];
		strs.toArray(ss);
		for(int i=0; i<ss.length; i++)
		{
			System.out.println(ss[i]);
		}
	}
	
}

[wrm519]

String regEx="([\/SYSTEM\/bos\/padownload\.jsp\?ftpPath=\/upImg\/9911938308140319576\.gif])";
Pattern p=Pattern.compile(regEx);
Matcher m=p.matcher(str);
m.group(1);

正则中()代表组,m.group(n)可以提取string, []表示匹配项,需要注意特殊字符(上面的regEx可能不对,没仔细看)
可以使用工具RegexBuddy生成

[Clesome_VC]

忘了加注释 ^_^

package zjq;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author ZhaoJiqing
 *
 */
public class Regex {
	static final String regexStr = "src=\"[a-zA-Z0-9/.?=]+\"";
	public static void main(String args[])
	{
		Regex r = new Regex();
		String string = "[IMG   height=50   src=\"/SYSTEM/bos/padownload.jsp?ftpPath"
			+"=/upImg/9911938308140319576.gif\"   width=50   border=0]文字文字111111 "
			+"[IMG   height=55   src=\"/SYSTEM/bos/padownload.jsp?ftpPath"
			+"=/upImg/9911938308140319577.gif\"   width=70   border=0]文字文字22222222222";
		r.doRegex(Regex.regexStr,string);
	}
	
	public void doRegex(String regexString,String string)
	{
		Pattern pattern = Pattern.compile(regexString);
		Matcher matcher = pattern.matcher(string);
		System.out.println(matcher.groupCount());
		List<String> strs = new ArrayList<String>();
		while(matcher.find())
		{
			String srcStr = matcher.group();	//这里得到的是src="........"的字符串
			String printStr = srcStr.substring(5,srcStr.length()-1); //去掉多余的字符src="和"
			strs.add(printStr);  		//将匹配的结果放入List
		}
		String[] ss = new String[strs.size()];    //将List转换成需要的数组
		strs.toArray(ss);
		for(int i=0; i<ss.length; i++)
		{
			System.out.println(ss[i]);
		}
	}
	
}

[daniel_kaka]

正则：

public static void getRegex(){
		String regex = "\\[IMG.*?src=\"(.*?)\".*?border=0\\](.*?) ";
		String src = "[IMG   height=50   src=\"/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319576.gif\"   width=50   border=0]文字文字111111 "+
		             "[IMG   height=55   src=\"/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319577.gif\"   width=70   border=0]文字文字222222 ";
		Pattern p = Pattern.compile(regex,Pattern.DOTALL + Pattern.MULTILINE);
		Matcher m = p.matcher(src);
		List<String> tmpList1 = new ArrayList<String>();
		List<String> tmpList2 = new ArrayList<String>();
		while (m.find()){
			tmpList1.add(m.group(1));
			tmpList2.add(m.group(2));
		}
		
		System.out.println(tmpList1.toString());
		System.out.println(tmpList2.toString());
	}

结果：
[/SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319576.gif, /SYSTEM/bos/padownload.jsp?ftpPath=/upImg/9911938308140319577.gif]
[文字文字111111, 文字文字222222]

[Lisliefor]

字符分析器，查API，关键字StringTokenizer