schemagen NullPointerException異常

Question

Java類：

@XmlAccessorType(XmlAccessType.FIELD) 
    @XmlType(name = "user", propOrder = { 
      "id", 
      "name" }) 
    public class User { 
     @XmlAttribute(required=true) 
     private long id; 
     @XmlAttribute(required=true) 
      private String name; 
     public long getId() { 
     return id; 
    } 
    public void setId(long id) { 
     this.id = id; 
    } 
    public String getName() { 
     return name; 
    } 
    public void setName(String name) { 
     this.name = name; 
    } 
    @Override 
    public String toString() { 
     return "User [id=" + id + ", name=" + name + "]"; 
    } 
} 

• JDK版本：1.6.0_31

• 異常堆棧跟蹤 schemagen User.java

  C:\anirban\work_eclipse_juno\RestfulWSDemo\src\com\domain>schemagen User.java 
  An exception has occurred in apt (1.6.0_31). Please file a bug at the Java Devel 
  oper Connection (http://java.sun.com/webapps/bugreport) after checking the Bug 
  Parade for duplicates. Include your program and the following diagnostic in your 
  report. Thank you. 
  java.lang.NullPointerException 
       at com.sun.tools.apt.main.CommandLine.parse(CommandLine.java:42) 
       at com.sun.tools.apt.main.Main.compile(Main.java:775) 
       at com.sun.tools.apt.Main.processing(Main.java:95) 
       at com.sun.tools.apt.Main.process(Main.java:85) 
       at com.sun.tools.apt.Main.process(Main.java:67) 
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. 
  java:39) 
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces 
  sorImpl.java:25) 
       at java.lang.reflect.Method.invoke(Method.java:597) 
       at com.sun.tools.internal.jxc.SchemaGenerator$Runner.main(SchemaGenerato 
  r.java:215) 
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. 
  java:39) 
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces 
  sorImpl.java:25) 
       at java.lang.reflect.Method.invoke(Method.java:597) 
       at com.sun.tools.internal.jxc.SchemaGenerator.run(SchemaGenerator.java:1 
  53) 
       at com.sun.tools.internal.jxc.SchemaGenerator.run(SchemaGenerator.java:6 
  3) 
       at com.sun.tools.internal.jxc.SchemaGenerator.main(SchemaGenerator.java: 
  55) 
  

  任何人都可以認罪e在這裏幫助我？

Answer 1

嘗試添加類路徑。 schemagen -cp「％java_home％\ lib \ tools.jar」User.java