SQL注入 將有可能泄露的數據的那個參數 改 str.replaceAll(".*([';]+|(--)+).*", " ");
在過濾器中加入這段代碼
//獲得所有請求參數名
Enumeration params = req.getParameterNames();
String sql = "";
while (params.hasMoreElements()) {
//得到參數名
String name = params.nextElement().toString();
//System.out.println("name===========================" + name + "--");
//得到參數對應值
String[] value = req.getParameterValues(name);
for (int i = 0; i < value.length; i++) {
sql = sql + value[i];
}
}
//System.out.println("============================SQL"+sql);
//有sql關鍵字,跳轉到error.html
if (sqlValidate(sql)) {
throw new IOException("您發送請求中的參數中含有非法字符");
//String ip = req.getRemoteAddr();
} else {
chain.doFilter(request,response);
}
//效驗
protected static boolean sqlValidate(String str) {
str = str.toLowerCase();//統一轉爲小寫
String badStr = "'|and|exec|execute|insert|select|delete|update|count|drop|*|%|chr|mid|master|truncate|" +
"char|declare|sitename|net user|xp_cmdshell|;|or|-|+|,|like'|and|exec|execute|insert|create|drop|" +
"table|from|grant|use|group_concat|column_name|" +
"information_schema.columns|table_schema|union|where|order|by|count|*|" +
"-|--|+|,|like|//|/|%|#";//過濾掉的sql關鍵字,可以手動添加
String[] badStrs = badStr.split("\\|");
for (int i = 0; i < badStrs.length; i++) {
if (str.indexOf(badStrs[i]) >= 0) {
return true;
}
}
return false;
}