使用appfuse的基本开发步骤

在appfuse手册中的开发步骤是先建立数据库表，然后通过自动化的工具产生pojo以及其他的对象。但是对于复杂的pojo，用数据库表现出来就显得力不从心。因此，适当的方法应当是先去写pojo，然后自动产生其他的代码。这里是我总结的开发步骤。

1。首先编写pojo，继承BaseObject，通过自动化工具产生set/get方法，以及hashCode(), toString(), equals()方法。我用了网上的一段开源代码放到我的工程里面，在eclipse里面直接调用：

java 代码

package org.appfuse.tools;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;

/**
 * A utility class that generates source code for good
 * boolean equals(), int hashCode(), and
 * String toString() implementations.
 *
 *
 * The algorithms used here are based largely on those presented in
 * "Effective Java" by
 * Josh Bloch, with some variations based on conversations with colleagues.
 *
 *
 * @author Erick G. Reid
 */
public class SourcecodeGenerator {

  /**
   * Returns a String representing usable
   * boolean equals(Object) sourcecode for the given
   * Class.
   *
   * @param source the Class to inspect.
   * @return a String representing usable
   *        boolean equals(Object) sourcecode for the given
   *        Class.
   */
  public static String getEqualsSourceCode(Class source) {
    Field[] fields = _getEligibleFields(source);
    StringBuffer sb = new StringBuffer();
    String className = _getClassName(source);
    sb.append("/**\n");
    sb.append(" * Compares this object to the specified object.  The result is\n");
    sb.append(" * true if and only if the argument is not null\n");
    sb.append(" * and is an instance of " which represents a\n" + className + ");
    sb.append(" * value equivalent to this ".\n" + className + ");
    sb.append(" *\n");
    sb.append(" * @param object the object to compare with.\n");
    sb.append(" * @return true if the objects are the same,\n)");
    sb.append(" *     returns false otherwise.\n");
    sb.append(" */\n");
    sb.append("public boolean equals(Object object) {\n");
    sb.append("  if (object != this) {\n");
    if (fields.length == 0) {
      sb.append(
          "    return object != null && getClass().equals(object.getClass());\n");
    }
    else {
      sb.append("    if (object != null && getClass().equals(object.getClass())) {\n");
      sb.append("      final " + className + " other = (" + className + ") object;\n");
      for (int i = 0; i < fields.length; i++) {
        if (i == 0) sb.append("      return ");
        else sb.append("          ");
        if (fields[i].getType().isPrimitive()) {
          sb.append("(" + fields[i].getName() + " == other." + fields[i].getName() + ")");
        }
        else {
          sb.append("(" + fields[i].getName() + " == null ? other." +
              fields[i].getName() + " == null : " + fields[i].getName() +
              ".equals(other." + fields[i].getName() + "))");
        }
        if (i == fields.length - 1) sb.append(";\n");
        else sb.append(" &&\n");
      }
      sb.append("    }\n");
      sb.append("    return false;\n");
    }
    sb.append("  }\n");
    sb.append("  return true;\n");
    sb.append("}\n");
    return sb.toString();
  }

/**
 * Returns a String representing usable hashCode()
 * sourcecode for the given Class.
 *
 * @param source the Class to inspect.
 * @return a String representing usable hashCode()
 *      sourcecode for the given Class.
 */
public static String getHashCodeSourceCode(Class source) {
  Field[] fields = _getEligibleFields(source);
  String className = _getClassName(source);
  StringBuffer sb = new StringBuffer();
  sb.append("/**\n");
  sb.append(" * Returns a hash code value for this ".\n" +
      className + ");
  sb.append(" *\n");
  sb.append(" * @return a hash code value for this ".\n" +
      className + ");
  sb.append(" */\n");
  sb.append("public int hashCode() {\n");
  sb.append("  int hashCode = " + source.getName().hashCode() +
      "; // result of getClass().getName().hashCode() \n");
  for (int i = 0; i < fields.length; i++) {
    if (fields[i].getType().isArray()) {
      sb.append("  for (int i = 0; i < " +
          fields[i].getName() + ".length; i++) {\n");
      _appendFieldHashCalculation(
          sb, fields[i].getType().getComponentType(),
          fields[i].getName() + "[i]", "      ");
      sb.append("  }\n");
      continue;
    }
    _appendFieldHashCalculation(
        sb, fields[i].getType(), fields[i].getName(), "    ");
  }
  sb.append("  return hashCode;\n");
  sb.append("}\n");
  return sb.toString();
}

  /**
   * Returns a String representing usable
   * String toString() sourcecode for the given Class.
   *
   * @param source the Class to inspect.
   * @return a String representing usable
   *        String toString() sourcecode for the given
   *        Class.
   */
  public static String getToStringSourceCode(Class source) {
    Field[] fields = _getEligibleFields(source);
    StringBuffer sb = new StringBuffer();
    String className = _getClassName(source);
    sb.append("/**\n");
    sb.append(" * Returns a String representation of this ".\n" +
        className + ");
    sb.append(" *\n");
    sb.append(" * @return a String representation of this ".\n" +
        className + ");
    sb.append(" */\n");
    sb.append("public String toString() {\n");
    if (fields.length == 0) {
      sb.append("  return \"" + className + "()\";\n");
    }
    else {
      sb.append("  StringBuffer buffer = new StringBuffer(\"" +
          className + "(\");\n");
      for (int i = 0; i < fields.length; i++) {
        sb.append("  buffer.append(\"" + fields[i].getName() + "=\" + " +
            fields[i].getName());
        if (i == fields.length - 1) sb.append(" + \")\");\n");
        else sb.append(" + \",\");\n");
      }
      sb.append("  return buffer.toString();\n");
    }
    sb.append("}\n");
    return sb.toString();
  }

  //--------------------------------------------------
  // implementation:
  //--------------------------------------------------

  private static void _appendFieldHashCalculation(
      StringBuffer sb, Class type, String fieldName, String indent) {

    if (type.isPrimitive()) {
      if (Boolean.TYPE.equals(type)) {
        sb.append(indent +
            "hashCode = 37 * hashCode + (" + fieldName + " ? 0 : 1);\n");
      }
      else if (Byte.TYPE.equals(type) || Character.TYPE.equals(type) ||
          Short.TYPE.equals(type) || Integer.TYPE.equals(type)) {
        sb.append(indent + "hashCode = 37 * hashCode + " +
            (Integer.TYPE.equals(type) ? "" : "(int) ") + fieldName + ";\n");
      }
      else if (Long.TYPE.equals(type)) {
        sb.append(indent + "hashCode = 37 * hashCode + (int)(" + fieldName +
            " ^ (" + fieldName + " >>> 32));\n");
      }
      else if (Float.TYPE.equals(type)) {
        sb.append(indent + "hashCode = 37 * hashCode + Float.floatToIntBits(" +
            fieldName + ");\n");
      }
      else if (Double.TYPE.equals(type)) {
        sb.append(indent + "long longBits = Double.doubleToLongBits(" +
            fieldName + ");\n");
        sb.append(indent +
            "hashCode = 37 * hashCode + (int)(longBits ^ (longBits >>> 32));\n");
      }
      return;
    }
    sb.append(indent + "hashCode = 37 * hashCode + (" +
        fieldName + " == null ? 0 : " + fieldName + ".hashCode());\n");
  }

  /**
   * Returns all instance fields from the given class that are found to be
   * non-public.
   */
  private static Field[] _getEligibleFields(Class source) {
    Field[] fields = source.getDeclaredFields();
    List<field></field> eligibleFields = new ArrayList<field></field>();
    for (int i = 0; i < fields.length; i++) {
      int modifiers = fields[i].getModifiers();
      if (!Modifier.isPublic(modifiers) && !Modifier.isStatic(modifiers)) {
        eligibleFields.add(fields[i]);
      }
    }
    return (Field[]) eligibleFields.toArray(new Field[eligibleFields.size()]);
  }

  private static String _getClassName(Class source) {
    String className = source.getName();
    return className.substring(className.lastIndexOf(".") + 1);
  }

  public static void main(String[] args) {
      Class source=null;
      //reslove object
      try {
        source=Class.forName(args[0]);
    } catch (ClassNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return;
    }

      System.out.println(SourcecodeGenerator.getEqualsSourceCode(source));
      System.out.println(SourcecodeGenerator.getHashCodeSourceCode(source));
      System.out.println(SourcecodeGenerator.getToStringSourceCode(source));
  }
}

 

产生pojo以后，加上xdoclet的tag，主要包含@hibernate以及◎spring.validator两方面的tag。通过tag的增加，规定了如何产生数据库的表。

2。运行ant hibernatedoclet自动产生hbm文件，在build/dao/gen/目录下。

3。通过如下的脚本工具可以根据指定的hbm文件创建数据库，当然也可以使用hibernate的schemaexport工具。

java 代码

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Properties;

import org.appfuse.util.XmlTools;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.w3c.dom.Document;

/**
 *
 * @author Cheney Yuan
 *
 */
public class HibernateSchemaExport {

    /**
     * @param args
     */
    public static void main(String[] args) {
        if (args.length < 1) {
            System.err.println("Usage: HibernateSchemaExport [full file path]hibernate.cfg.xml/database.properties "
                + "[resource path]mapping.hbm.xml\n");
            System.exit(-1);
        }

        Configuration config=new Configuration();
        Properties properties=new Properties();

        String fullPathName=args[0];
        try {
            if (fullPathName.indexOf(".xml")>0) {
                System.out.println("use xml file to configure.");
                Document doc = null;
                doc = XmlTools.getDocumentFromXmlFile(fullPathName);
                config.configure(doc);
            }else if (fullPathName.indexOf(".properties")>0) {
                System.out.println("use properties to configure.");
                Properties props = new Properties();
                props.putAll( config.getProperties() );
                props.load( new FileInputStream( fullPathName ) );
                config.setProperties( props );

            }
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        //add hbm resources
        for (int i=1;i
            config.addResource(args[i]);
        }
        /**
         * @param script print the DDL to the console
         * @param export export the script to the database
         */
        new SchemaExport(config).create(true, false);

    }

}

4。到extras/appgen下面运行ant install-detailed产生其他的类和测试程序。

5。applicationContext-hibernate.xml里面的hbm文件必须自己添加，该文件的位置在src/dao/org/appfuse/dao/hibernate/目录下。

6。运行ant deploy即可完成整个开发步骤。