我的文字在降价格式中有一些内容，它由两部分组成，第一部分由虚线包围，是元数据，其余部分在虚线之后是实际内容。
我的格式是这样的：
---
toc:
customization:
title: Customization
themes: Themes
plugins: Plugins
nav: 5
---
summary: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque vel diam purus.
body:Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque vel diam purus.`
我想在这些虚线中提取内容并将其存储在单独的HashMap中（不希望将这些破折号存储在地图中），并且类似地将hashMap分离为实际内容。
Scanner scanner = new Scanner(new FileReader("src/main/webapp/WEB-INF/content/" + url + ".md"));
HashMap<String, String> map = new HashMap<String, String>();
while (scanner.hasNextLine()) {
String[] columns = scanner.nextLine().split(":");
for (int i = 0; i < columns.length; i++) {
if (!columns[i].isEmpty() && !columns[i].contains("---")) {
map.put(columns[0], columns[1]);
}
}
}
scanner.close();
System.out.println(map);
有谁能告诉我如何在破折号中提取这些行并将其存储在单独的HashMap中并将实际内容存储在单独的HashMap中？
答案 0 :(得分：3)
只需跟踪要使用的地图：
Map<String, String> regularMap = new HashMap<String, String>();
Map<String, String> separateMap = new HashMap<String, String>();
Map<String, String> currentMap = regularMap;
boolean inDashes = false;
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
if(line.equals("---")) {
// switch state
inDashes = !inDashes;
currentMap = inDashes ? separateMap : regularMap;
} else {
String[] columns = line.split(":");
for (int i = 0; i < columns.length; i++) {
if (!columns[i].isEmpty()) {
currentMap.put(columns[0], columns[1]);
}
}
}
}
答案 1 :(得分：0)
这个简单的代码应该可以正常工作。
public static void parseFile(String url) throws FileNotFoundException {
Scanner scanner = new Scanner(new FileReader("src/main/webapp/WEB-INF/content/" + url + ".md"));
// create a two maps
HashMap<String, String> metaData = new HashMap();
HashMap<String, String> content = new HashMap();
// and a marker
boolean isMetaData = false;
while (scanner.hasNextLine()) {
String nextLine = scanner.nextLine();
if ("---".equals(nextLine)) { // if line equals "---" then
isMetaData = !isMetaData; // switch a marker
continue; // and skip this line
}
// add to proper map the value from the line
addPropertyToMap(isMetaData ? metaData : content, nextLine.split(":"));
}
scanner.close();
System.out.println(metaData);
System.out.println(content);
}
private static void addPropertyToMap(HashMap<String, String> map, String[] columns){
if(columns.length == 1){
// if your key don't have value, replace it with an empty string
map.put(columns[0].trim(), "");
} else {
map.put(columns[0].trim(), columns[1].trim());
}
}
运行此代码时，您应该得到以下结果：
{themes=Themes, nav=5, customization=, plugins=Plugins, toc=, title=Customization}
{summary=Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque vel diam purus., body=Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque vel diam purus.}
答案 2 :(得分：0)
我认为解析和提取数据的最佳方法是使用 Model类，然后将数据解析为模型对象实例并将它们存储在
public class Model {
// Fields
private String toc;
private String customization;
private String title;
private String themes;
private String plugins;
private int nav;
// No-arg Default Constructor
public Model() {};
// Getters & Setters
public String getToc() {
return toc;
}
public void setToc(String toc) {
this.toc = toc;
}
public String getCustomization() {
return customization;
}
public void setCustomization(String customization) {
this.customization = customization;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getThemes() {
return themes;
}
public void setThemes(String themes) {
this.themes = themes;
}
public String getPlugins() {
return plugins;
}
public void setPlugins(String plugins) {
this.plugins = plugins;
}
public int getNav() {
return nav;
}
public void setNav(int nav) {
this.nav = nav;
}
}
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
public class Test {
private static final int OBJECT_LINE_LENGTH = 6;
public static void main(String[] args) throws Exception {
String url = "testFile";
Scanner scanner = new Scanner(new FileReader("src/main/webapp/WEB-INF/content/" + url + ".md"));
boolean isInContent = false;
int lineCounter = 0;
String lines[] = new String[OBJECT_LINE_LENGTH];
List<Model> objectList = new ArrayList<Model>();
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
if(line.equals("---")) {
if(isInContent == false) {
isInContent = true;
continue;
} else {
isInContent = false;
}
}
if(!isInContent) {
continue;
}
lines[lineCounter++] = line;
if(lineCounter == 6) {
lineCounter = 0;
objectList.add(parseObject(lines));
}
}
scanner.close();
printObjectList(objectList);
}
private static Model parseObject(String lines[]) {
Model model = new Model();
model.setToc(Arrays.copyOfRange(lines, 1, 4).toString());
model.setCustomization(Arrays.copyOfRange(lines, 2, 4).toString());
model.setTitle(lines[2].split(":")[1].trim());
model.setThemes(lines[3].split(":")[1].trim());
model.setPlugins(lines[4].split(":")[1].trim());
model.setNav(Integer.parseInt(lines[5].split(":")[1].trim()));
return model;
}
private static void printObjectList(List<Model> objectList) {
for(Model m : objectList) {
System.out.println();
System.out.println("Title : " + m.getTitle());
System.out.println("Themes : " + m.getThemes());
System.out.println("Plugins: " + m.getPlugins());
System.out.println("Nav : " + m.getNav());
}
}
}
---
toc:
customization:
title: Customization
themes: Themes
plugins: Plugins
nav: 5
---
---
toc:
customization:
title: anotherCustomization
themes: anotherThemes
plugins: anotherPlugins
nav: 10
---
---
toc:
customization:
title: ThirdCustomization
themes: ThirdTheme
plugins: ThirdPlugin
nav: 15
---
---
toc:
customization:
title: fourthCustomization
themes: fourthTheme
plugins: fourthPlugin
nav: 20
---
Title : Customization
Themes : Themes
Plugins: Plugins
Nav : 5
Title : anotherCustomization
Themes : anotherThemes
Plugins: anotherPlugins
Nav : 10
Title : ThirdCustomization
Themes : ThirdTheme
Plugins: ThirdPlugin
Nav : 15
Title : fourthCustomization
Themes : fourthTheme
Plugins: fourthPlugin
Nav : 20