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“threedr3am”
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feat:java-compile
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‎java-compile/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>learn-java-bug</artifactId>
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<groupId>com.xyh</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>java-compile</artifactId>
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<dependencies>
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<dependency>
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<groupId>org.javassist</groupId>
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<artifactId>javassist</artifactId>
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<version>3.25.0-GA</version>
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<scope>compile</scope>
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</dependency>
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</dependencies>
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</project>

‎java-compile/src/main/java/com/threedr3am/bug/compile/javac/ByJavaCompiler.java

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package com.threedr3am.bug.compile.javac;
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import javax.tools.JavaCompiler;
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import javax.tools.ToolProvider;
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/**
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* @author threedr3am
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*/
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public class ByJavaCompiler {
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//直接使用JavaCompiler指定java文件编译
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public static void c() {
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JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler();
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int compilationResult = javaCompiler.run(null, null, null, "-cp", "/tmp/ccc/CCC.jar", "/tmp/Main.java");
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// 返回0表示编译成功
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if (compilationResult == 0) {
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System.out.println("success");
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} else {
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System.out.println("fail");
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}
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}
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public static void main(String[] args) {
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c();
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}
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}

‎java-compile/src/main/java/com/threedr3am/bug/compile/javac/ByJavaFileObject.java

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package com.threedr3am.bug.compile.javac;
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import java.nio.charset.Charset;
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import java.util.List;
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import java.util.Locale;
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import javax.tools.Diagnostic;
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import javax.tools.DiagnosticCollector;
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import javax.tools.JavaCompiler;
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import javax.tools.JavaCompiler.CompilationTask;
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import javax.tools.JavaFileObject;
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import javax.tools.StandardJavaFileManager;
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import javax.tools.ToolProvider;
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/**
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* @author threedr3am
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*/
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public class ByJavaFileObject {
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//使用了JavaFileObject指定java文件进行编译
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public static void d() {
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JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler();
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ClassLoader classLoader = ByJavaFileObject.class.getClassLoader();
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DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector();
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StandardJavaFileManager standardJavaFileManager = javaCompiler
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.getStandardFileManager(diagnostics, Locale.CHINA, Charset.forName("utf-8"));
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// FileManagerImpl fileManager = new FileManagerImpl(standardJavaFileManager);
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Iterable<? extends JavaFileObject> javaFileObjects = standardJavaFileManager.getJavaFileObjects("/tmp/ccc/CCC.java", "/tmp/Main.java");
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// 编译任务
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CompilationTask task = javaCompiler.getTask(null, standardJavaFileManager, diagnostics, null, null, javaFileObjects);
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Boolean result = task.call();
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System.out.println(result);
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List list = diagnostics.getDiagnostics();
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for (Object object : list) {
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Diagnostic d = (Diagnostic) object;
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System.out.println(d.getMessage(Locale.ENGLISH));
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}
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}
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public static void main(String[] args) {
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d();
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}
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}

‎java-compile/src/main/java/com/threedr3am/bug/compile/javac/CustomJavaFileObject.java

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package com.threedr3am.bug.compile.javac;
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import java.io.IOException;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.nio.charset.Charset;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Locale;
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import javax.tools.Diagnostic;
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import javax.tools.DiagnosticCollector;
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import javax.tools.JavaCompiler;
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import javax.tools.JavaCompiler.CompilationTask;
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import javax.tools.JavaFileObject;
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import javax.tools.SimpleJavaFileObject;
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import javax.tools.StandardJavaFileManager;
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import javax.tools.ToolProvider;
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/**
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* @author threedr3am
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*/
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public class CustomJavaFileObject {
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//使用了自定义JavaFileObject实现的动态编译
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public static void e() throws URISyntaxException {
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JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler();
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ClassLoader classLoader = CustomJavaFileObject.class.getClassLoader();
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DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector();
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StandardJavaFileManager standardJavaFileManager = javaCompiler
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.getStandardFileManager(diagnostics, Locale.CHINA, Charset.forName("utf-8"));
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// FileManagerImpl fileManager = new FileManagerImpl(standardJavaFileManager);
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StringBuilder stringBuilder = new StringBuilder()
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.append("class Main {")
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.append(" public static void main(String[] args) {")
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.append(" System.out.println(\"hello FFF!\");")
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.append(" }")
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.append("}");
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Iterable<? extends JavaFileObject> javaFileObjects = Arrays
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.asList(new JavaObjectFromString("Main", stringBuilder.toString()));
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// 编译任务
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CompilationTask task = javaCompiler.getTask(null, standardJavaFileManager, diagnostics, null, null, javaFileObjects);
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Boolean result = task.call();
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System.out.println(result);
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List list = diagnostics.getDiagnostics();
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for (Object object : list) {
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Diagnostic d = (Diagnostic) object;
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System.out.println(d.getMessage(Locale.ENGLISH));
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}
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}
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public static void main(String[] args) throws URISyntaxException {
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e();
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}
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static class JavaObjectFromString extends SimpleJavaFileObject {
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private String content;
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public JavaObjectFromString(String className, String content) throws URISyntaxException {
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super(new URI(className), Kind.SOURCE);
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this.content = content;
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}
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@Override
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public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
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return content;
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}
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}
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}

‎java-compile/src/main/java/com/threedr3am/bug/compile/javac/CustomJavaFileObjectAndFileManeger.java

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package com.threedr3am.bug.compile.javac;
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import java.io.IOException;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.nio.charset.Charset;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import javax.tools.Diagnostic;
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import javax.tools.DiagnosticCollector;
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import javax.tools.FileObject;
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import javax.tools.ForwardingJavaFileManager;
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import javax.tools.JavaCompiler;
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import javax.tools.JavaCompiler.CompilationTask;
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import javax.tools.JavaFileManager;
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import javax.tools.JavaFileObject;
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import javax.tools.SimpleJavaFileObject;
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import javax.tools.StandardJavaFileManager;
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import javax.tools.StandardLocation;
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import javax.tools.ToolProvider;
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/**
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* @author threedr3am
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*/
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public class CustomJavaFileObjectAndFileManeger {
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//使用了自定义JavaFileObject实现的动态编译
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public static void e() throws URISyntaxException {
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JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler();
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ClassLoader classLoader = CustomJavaFileObjectAndFileManeger.class.getClassLoader();
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DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector();
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StandardJavaFileManager standardJavaFileManager = javaCompiler
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.getStandardFileManager(diagnostics, Locale.CHINA, Charset.forName("utf-8"));
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// FileManagerImpl fileManager = new FileManagerImpl(standardJavaFileManager);
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StringBuilder stringBuilder = new StringBuilder()
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.append("class Main {")
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.append(" public static void main(String[] args) {")
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.append(" System.out.println(\"hello FFF!\");")
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.append(" }")
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.append("}");
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Iterable<? extends JavaFileObject> javaFileObjects = Arrays
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.asList(new JavaObjectFromString("Main", stringBuilder.toString()));
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// 编译任务
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CompilationTask task = javaCompiler.getTask(null, standardJavaFileManager, diagnostics, null, null, javaFileObjects);
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Boolean result = task.call();
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System.out.println(result);
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List list = diagnostics.getDiagnostics();
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for (Object object : list) {
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Diagnostic d = (Diagnostic) object;
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System.out.println(d.getMessage(Locale.ENGLISH));
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}
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}
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public static void main(String[] args) throws URISyntaxException {
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e();
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}
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static class JavaObjectFromString extends SimpleJavaFileObject {
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private String content;
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public JavaObjectFromString(String className, String content) throws URISyntaxException {
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super(new URI(className), Kind.SOURCE);
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this.content = content;
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}
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@Override
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public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
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return content;
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}
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}
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static class FileManagerImpl extends ForwardingJavaFileManager<JavaFileManager> {
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private final Map<URI, JavaFileObject> fileObjects
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= new HashMap<URI, JavaFileObject>();
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public FileManagerImpl(JavaFileManager fileManager) {
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super(fileManager);
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}
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@Override
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public FileObject getFileForInput(Location location, String packageName,
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String relativeName) throws IOException {
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FileObject o = fileObjects.get(uri(location, packageName, relativeName));
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if (o != null) {
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return o;
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}
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return super.getFileForInput(location, packageName, relativeName);
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}
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public void putFileForInput(StandardLocation location, String packageName,
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String relativeName, JavaFileObject file) {
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fileObjects.put(uri(location, packageName, relativeName), file);
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}
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private URI uri(Location location, String packageName, String relativeName) {
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return null;
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}
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}
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}

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