以下是程序的输出：
Aim String:buffer size1=0x1234 buffer size2=1024 buffer size3=9999
[src pattern]:buffer size1=VAR{HEX_NUM=>N1} buffer size2=VAR{STRING=>N2} buffer size3=VAR{DEC_NUM=>N3}
[dst pattern]:buffer size1=(0x\d{1,}) buffer size2=(.*?) buffer size3=(\d{1,})
[var List]
N1 0x1234
N2 1024
N3 9999
本意是分析Aim String,获取size1 size2 size3的数据,并且与3个变量N1 N2 N3关联。
为此定义了一个串在 src pattern中, 青年人网提示首先分析src pattern并得到目标的正则表达式
然后匹配数据,在匹配的过程中将数据与关键字关联。
程序代码如下：
class UserStringPattern
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
public class UserStringPattern {
public StringBuffer userPattern;
public StringBuffer destPattern;
public Pattern pattern;
public List<VarValue> varList;
public UserStringPattern(StringBuffer userPattern) {
super();
this.userPattern = userPattern;
this.destPattern = new StringBuffer(userPattern);
varList = new ArrayList();
}
@Override
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("[src pattern]:" + userPattern);
sb.append("\n");
sb.append("[dst pattern]:" + destPattern);
sb.append("\n");
sb.append("[var List]\n");
for (int i = 0; i < varList.size(); i++) {
sb.append("\t" + varList.get(i).toString());
sb.append("\n");
}
return sb.toString();
}
public String getValueByName(String name) {
for (int i = 0; i < varList.size(); i++) {
VarValue varValue = varList.get(i);
if (varValue.varName.equals(name)) {
return varValue.value;
}
}
return "";
}
}
class RegExpUtil
package com.flylb.util;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
class VarValue {
public String varName;
public String value;
public VarValue(String varName, String value) {
super();
this.varName = varName;
this.value = value;
}
@Override
public String toString() {
return varName + "\t" + value;
}
}
@SuppressWarnings("unchecked")
public class RegExpUtil {
private static Log log = LogFactory.getLog(RegExpUtil.class);
private static Map<String, String> regExpMap = new HashMap();
static {
regExpMap.put("DEC_NUM", "(\\d{1,})");
regExpMap.put("HEX_NUM", "(0x\\d{1,})");
regExpMap.put("STRING", "(.*?)");
}
责任编辑：小草
