java.lang.Object
- org.springframework.boot.loader.tools.JarWriter

All Implemented Interfaces:
LoaderClassesWriter
```
public class JarWriter
extends Object
implements LoaderClassesWriter
```
Writes JAR content, ensuring valid directory entries are always create and duplicate items are ignored.

Constructor Summary
Constructors
Constructor Description
JarWriter(File file)
Create a new JarWriter instance.
JarWriter(File file, LaunchScript launchScript)
Create a new JarWriter instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`	Close the writer.
`void`	`writeEntries(JarFile jarFile)`	Write all entries from the specified jar file.
`void`	`writeEntry(String entryName, InputStream inputStream)`	Writes an entry.
`void`	`writeLoaderClasses()`	Write the required spring-boot-loader classes to the JAR.
`void`	`writeLoaderClasses(String loaderJarResourceName)`	Write the required spring-boot-loader classes to the JAR.
`void`	`writeManifest(Manifest manifest)`	Write the specified manifest.
`void`	`writeNestedLibrary(String destination, Library library)`	Write a nested library.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - JarWriter
```
public JarWriter(File file)
          throws FileNotFoundException,
                 IOException
```
    Create a new JarWriter instance.
    Parameters:
    file - the file to write
    Throws:
    IOException - if the file cannot be opened
    FileNotFoundException - if the file cannot be found
  - JarWriter
```
public JarWriter(File file,
                 LaunchScript launchScript)
          throws FileNotFoundException,
                 IOException
```
    Create a new JarWriter instance.
    Parameters:
    file - the file to write
    launchScript - an optional launch script to prepend to the front of the jar
    Throws:
    IOException - if the file cannot be opened
    FileNotFoundException - if the file cannot be found
- Method Detail
  - writeManifest
```
public void writeManifest(Manifest manifest)
                   throws IOException
```
    Write the specified manifest.
    Parameters:
    manifest - the manifest to write
    Throws:
    IOException - of the manifest cannot be written
  - writeEntries
```
public void writeEntries(JarFile jarFile)
                  throws IOException
```
    Write all entries from the specified jar file.
    Parameters:
    jarFile - the source jar file
    Throws:
    IOException - if the entries cannot be written
  - writeEntry
```
public void writeEntry(String entryName,
                       InputStream inputStream)
                throws IOException
```
    Writes an entry. The inputStream is closed once the entry has been written
    Specified by:
    writeEntry in interface LoaderClassesWriter
    Parameters:
    entryName - The name of the entry
    inputStream - The stream from which the entry's data can be read
    Throws:
    IOException - if the write fails
  - writeNestedLibrary
```
public void writeNestedLibrary(String destination,
                               Library library)
                        throws IOException
```
    Write a nested library.
    Parameters:
    destination - the destination of the library
    library - the library
    Throws:
    IOException - if the write fails
  - writeLoaderClasses
```
public void writeLoaderClasses()
                        throws IOException
```
    Write the required spring-boot-loader classes to the JAR.
    Specified by:
    writeLoaderClasses in interface LoaderClassesWriter
    Throws:
    IOException - if the classes cannot be written
  - writeLoaderClasses
```
public void writeLoaderClasses(String loaderJarResourceName)
                        throws IOException
```
    Write the required spring-boot-loader classes to the JAR.
    Specified by:
    writeLoaderClasses in interface LoaderClassesWriter
    Parameters:
    loaderJarResourceName - the name of the resource containing the loader classes to be written
    Throws:
    IOException - if the classes cannot be written
  - close
```
public void close()
           throws IOException
```
    Close the writer.
    Throws:
    IOException - if the file cannot be closed

Constructor	Description
`JarWriter(File file)`	Create a new `JarWriter` instance.
`JarWriter(File file, LaunchScript launchScript)`	Create a new `JarWriter` instance.

Class JarWriter

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

JarWriter

JarWriter

Method Detail

writeManifest

writeEntries

writeEntry

writeNestedLibrary

writeLoaderClasses

writeLoaderClasses

close