使用appfuse的基本开发步骤-优快云博客

本文介绍了一种基于AppFuse框架的开发流程，包括编写POJO类、生成代码、配置数据库等步骤，适用于复杂项目的快速开发。

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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);
}
}