无法执行 jSoup Parser

Question

I have been looking for information in order to use jSoup so that I can extract some elements from another website, but I can't make it run.

I have installed Java and Maven, I created a Java file and then a pom.xml dependency, but when I execute it on Terminal (I'm using Mac), it gives me errors.

I'm totally lost. I can't even run a simple code so that I can start understanding. I have make several google search but all the tutorials start over a basic knowledge.

I would appreciate if you could tell me where could I start from 0 knowledge, because I´m getting desperate.

Answer 1

The pom.xml file describes your project so that Maven knows how to compile it. At a minimum you need to define your project's group ID, artifact ID, and version--the Maven "coordinates." If your project requires libraries, like jsoup, then you can include a <dependencies> section with a <dependency> for each library. I think you've gotten this far.

Maven expects the project to have a certain structure.

• You should have a directory with the pom.xml in it.
• You should have a subdirectory called "src"
• Within the "src" directory, you should have a directory called "main"
• Within "main," you should have a subdirectory called "java"
• Within "java," Java source files live in directories that correspond to their packages, so if you have "package com.manuelsagra.laxtore" for class App then that goes in (the directory with pom.xml)/src/main/java/com/manuelsagra/laxtore/App.java.

Sorry if some of this is review for you.

You should run Maven (mvn) from the top directory containing pom.xml:

$ mvn install

That should download jsoup and compile anything in src/main/java.

Then you can run "mvn exec:java ..." from the same directory.

Answer 2

You didn't need maven in order to run JSoup, you can:

1. download the jsoup jar from jsoup.org ,
2. put it to the project classpath (eg. add jar to netbeans project )
3. import jsoup in your class

and you're good to go.

with maven

1. create a Maven project (eg maven-quickstart ) the process could be slightly different depending on the IDE that you're using.
2. add the jsoup dependencies to the pom, by either following the instruction in the link above, or editing the POM.xml , so it looks :

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yourorgaaniztion</groupId>
    <artifactId>jsoup-with-maven</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <dependencies>
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.10.1</version>
        </dependency>
    </dependencies>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
</project>

the project structure (pom.xml location) should looks like:

I would appreciate if you could tell me where could I star from 0 knowledge, >because I´m getting desperate.

from this point, I think you could continue with this mkyong tutorial