我希望在Java中使用正则表达式，它可以包含任何特殊字符，字母或数字，但不包含＆lt; 或＆gt; （尖括号）。
我找到了这个，import UIKit
class ViewController: UIViewController ,UITableViewDelegate, UITableViewDataSource{
@IBOutlet weak var tableView: UITableView!
var rows: NSMutableArray!
override func viewDidLoad() {
super.viewDidLoad()
self.rows = ["1","2","3","4","5","6","7"]
self.tableView.reloadData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func clearList(sender: AnyObject) {
let alert = UIAlertController(title: "Clear List?",
message: "Are you sure you want to clear the list?",
preferredStyle: .Alert)
let yesClearAction = UIAlertAction(title: "Yes", style: .Default, handler: { (action:UIAlertAction) -> Void in
self.clearListNow("GroceryList")
self.tableView.reloadData()
})
let noClearAction = UIAlertAction(title: "No", style: .Default, handler: { (action:UIAlertAction) -> Void in
//do nothing aka don't clear list
})
alert.addAction(yesClearAction)
alert.addAction(noClearAction)
presentViewController(alert, animated: true, completion: nil)
}
func clearListNow(entity: String) {
self.rows.removeAllObjects()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return self.rows.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let cell = tableView.dequeueReusableCellWithIdentifier("FruitCell", forIndexPath: indexPath) as? MyCell
cell!.textLabel?.text = self.rows[indexPath.row] as? String
return cell!
}
}
但它给出了
转义序列无效
在我的代码中使用。
请帮忙。
答案 0 :(得分：1)
String regex="[^<>]*";
Pattern p= Pattern.compile(regex);
if(p.matcher("your input string").matches()){
// place for your logic
}