java - 提示如何从 List 中提取文本

Question

在我的 java 应用程序中，我有一个 List<String> sbuff_Test = new ArrayList<>();我在执行期间填充的结构。当 sbuff_Test准备好了，我把它的每一串都放在一个 jTextArea 中.我的输出是这样的:

Please choose Node: 
2 :  Low   s23_t0
1 :  High  s23_t0           (Id = 0)

* TESTPAD  MAIN  MENU   (v10r0p0) *
----------------------------------

LowPT  PAD  s23_t0  on node 2

1 = Initialize PAD
2 = PRODE MENU
3 = TTC   MENU
4 = CM    MENU
5 = FPGA  MENU
6 = LINK  MENU
7 = CAN   MENU
8 = ELMB  MENU
9 = SPLITTER MENU
10 = Change CURRENT PAD
11 = Reset full PAD
12 = Warm Initialize PAD
13 = Change Pad configuration
14 = Change CM latencies  
15 = Phase measurement
16 = Power ON/OFF
17 = Print PAD Status
18 = Measurement loop
19 = Read CM trigger frequencies
20 = fast check of locks
21 = TRIGGER MENU
22 = Read CM BC ids
23 = Test CM BC ids with prode
24 = Test CM BC ids with TTC
25 = Test init low-high
 0 = Quit
TESTPAD:  ELMB MENU
(1) ELMB reset 
(2) power OFF/ON ELMB on Node 1
(3) ELMB firm/hard version 
(4) set CAN-debug ON/OFF
(5) set the communication rate
(6) download XPG file into FLASH for localInit
(0) exit 
 2
 Firmware Version SV22
 Hardware Version pad8
 TESTPAD:  ELMB MENU
 (1) ELMB reset 
 (2) power OFF/ON ELMB on Node 1
 (3) ELMB firm/hard version 
 (4) set CAN-debug ON/OFF
 (5) set the communication rate
 (6) download XPG file into FLASH for localInit
 (0) exit

现在，我想知道如何只提取我需要的文本；例如，对于上面的文本:

LowPT  PAD  s23_t0  on node 2
Firmware Version SV22
Hardware Version pad8

问题是我必须删除的文本部分是可变的，我找不到解决这个问题的方法。你对类似的问题有什么建议？感谢提示。

Answer 1

编辑:

要删除不需要的短语，您只需要使用 matcher.replaceAll("") 方法，在此示例中，我将使用旧模式:

String text = jTextAreaName.getText();

//This is the list of the wanted groups
String[] patterns = new String[]{"(LowPT .+)[\\r\\n]", "(Firmware Version .+)[\\r\\n]", "(Hardware Version .+)[\\r\\n]"};


//Then delete the three matched groups like this
for(int i=0; i<patterns.length; i++) {
    Pattern pattern = Pattern.compile(patterns[i]);
    Matcher matcher = pattern.matcher(text);
    while(matcher.find()) {
       text = matcher.replaceAll("");
    }
}

这是 Updated DEMO .

---

在这种情况下，您需要使用 Regex Matcher 和匹配组只从中提取想要的部分:

String text = jTextAreaName.getText();

//This is the list of the wanted groups
String[] patterns = new String[]{"(LowPT .+)[\\r\\n]", "(Firmware Version .+)[\\r\\n]", "(Hardware Version .+)[\\r\\n]"};


//Then extract the three matched groups like this
String myResult="";
for(int i=0; i<patterns.length; i++) {
     //compile each matching group and find matches.
     Pattern pattern = Pattern.compile(patterns[i]);
     Matcher matcher = pattern.matcher(text);
     while(matcher.find()) {
         myResult += matcher.group(1);
         myResult += "\n";
     }
}

这是一个 Live DEMO 你可以在哪里测试它，给出以下结果:

LowPT PAD s23_t0 on node 2

Firmware Version SV22

Hardware Version pad8

解释:

• (LowPT .+)[\\r\\n] 是行 LowPT PAD s23_t0 on node 2 的匹配组.
• (Firmware Version .+)[\\r\\n] 是 Firmware Version SV22 行的匹配组。
• (Hardware Version .+)[\\r\\n] 是 Hardware Version pad8 行的匹配组。