嗨，我对常规表达不太了解。但我需要使用angularJs进行表单验证。
以下是要求
输入框只有在
的情况下才能接受（1）前2个字母alpha + 6数字
或
（2）8数字
以下是一些正确的输入： -
（1）SH123456 （2）12345678 （3）sd456565
我试过 public class BuilderPage extends ActionBarActivity implements
RecyclerViewAdapter.OnItemClickListener {
private RecyclerView myRecyclerView;
private LinearLayoutManager linearLayoutManager;
private RecyclerViewAdapter myRecyclerViewAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.builder_layout);
ButterKnife.bind(this);
setSupportActionBar(toolbar1);
getSupportActionBar().setDisplayShowTitleEnabled(false);
dbHelper = new DbHelper(this);
dbHelper.getWritableDatabase();
ArrayList<String> nameList =
getIntent().getStringArrayListExtra("key");
myRecyclerView =
(RecyclerView)findViewById(R.id.recyclerView_builderxml);
linearLayoutManager =
new LinearLayoutManager(this,
LinearLayoutManager.VERTICAL,false);
myRecyclerViewAdapter = new RecyclerViewAdapter(this,nameList);
myRecyclerView.setAdapter(myRecyclerViewAdapter);
myRecyclerView.setLayoutManager(linearLayoutManager);
myRecyclerViewAdapter.setOnItemClickListener(this);
slidingDrawer.open();
slidingDrawer.setOnDrawerCloseListener(new SlidingDrawer.OnDrawerCloseListener() {
@Override
public void onDrawerClosed() {
slideHandleButton.setImageDrawable(getResources().getDrawable(R.drawable.arrowup));
}
});
slidingDrawer.setOnDrawerOpenListener(new SlidingDrawer.OnDrawerOpenListener() {
@Override
public void onDrawerOpened() {
slideHandleButton.setImageDrawable(getResources().getDrawable(R.drawable.arrowdown));
}
});
}
@OnClick(R.id.imgviewtextbox)
public void OnClick_TextBox(View view)
{
Intent intent = new Intent(getApplicationContext(),MyEditor.class);
intent.putExtra("item","textbox");
startActivity(intent);
}
@OnClick(R.id.imgviewplaintext)
public void OnClick_PlainText(View view)
{
Intent intent = new Intent(getApplicationContext(),MyEditor.class);
intent.putExtra("item","plaintext");
startActivity(intent);
}
@OnClick(R.id.imgviewcheckbox)
public void OnClick_CheckBox(View view)
{
dbHelper.Insert_RadioButton("CheckBox");
Intent intent = new Intent(getApplicationContext(),MyEditor.class);
intent.putExtra("item","checkbox");
startActivity(intent);
}
@OnClick(R.id.imgviewradiobutton)
public void OnClick_RadioButton(View view)
{
dbHelper.Insert_RadioButton("RadioButton");
Intent intent = new Intent(getApplicationContext(),MyEditor.class);
intent.putExtra("item","radiobutton");
startActivity(intent);
}
，它对上述两种情况都很好但仍然接受像S2D3E4F5这样的字符串，也可能是很多其他组合。
我做错了什么我无法找到它。
任何帮助都很明显!!!
谢谢
答案 0 :(得分：2)
在你的正则表达式中，两个替代分支分别锚定：
(^([a-zA-Z]){2}([0-9]){6}) - 字符串开头的2个字母和6位数字| - 或([0-9]*)?$ - 字符串末尾的可选零个或多个数字您需要调整组的边界：
data-ng-pattern="/^([a-zA-Z]{2}[0-9]{6}|[0-9]{8})?$/"
^ ^^^^
请参阅regex demo。
现在，模式将匹配：
^ - 字符串开头( - 开始分组：
[a-zA-Z]{2}[0-9]{6} - 2个字母和6个数字| - 或[0-9]{8} - 8位数字)? - 分组结束且?量词使其匹配1或0次（可选）$ - 字符串结束。答案 1 :(得分：2)