java用Cglib自动生成类，自动生成get/set方法
费话少说，直接上代码:
示例:
package com.iaiai.test;import java.util.HashMap;import java.util.Map;import net.sf.cglib.asm.ClassVisitor;import net.sf.cglib.asm.Type;import net.sf.cglib.beans.BeanGenerator;import net.sf.cglib.core.ClassEmitter;import net.sf.cglib.core.Constants;import net.sf.cglib.core.EmitUtils;/** * * <p> * Title: BeanGeneratorObj.java * </p> * <p> * E-Mail: 176291935@qq.com * </p> * <p> * QQ: 176291935 * </p> * <p> * Http: iaiai.iteye.com * </p> * <p> * Create time: 2011-11-2 * </p> * * @author 丸子 * @version 0.0.1 */public class BeanGeneratorObj extends BeanGenerator {public BeanGeneratorObj() { super(); }private Map props = new HashMap();public void addProperty(String name, Class type) {super.addProperty(name, type);if (props.containsKey(name)) {throw new IllegalArgumentException("Duplicate property name "" + name + """);}props.put(name, Type.getType(type));}public void generateClass(ClassVisitor v) throws Exception {int size = props.size();String[] names = (String[]) props.keySet().toArray(new String[size]);Type[] types = new Type[size];for (int i = 0; i < size; i++) {types[i] = (Type) props.get(names[i]);}ClassEmitter ce = new ClassEmitter(v);ce.begin_class(Constants.V1_2, Constants.ACC_PUBLIC, getClassName(),getDefaultClassLoader() != null ? Type.getType(getDefaultClassLoader().getClass()): Constants.TYPE_OBJECT, null, null);EmitUtils.null_constructor(ce);add_properties(ce, names, types);ce.end_class();}private void add_properties(ClassEmitter ce, String[] names, Type[] types) { for (int i = 0; i < names.length; i++) { String fieldName = names[i]; ce.declare_field(Constants.ACC_PRIVATE, fieldName, types[i], null); EmitUtils.add_property(ce, names[i], types[i], fieldName); } }}package com.iaiai.test;import java.util.Iterator;import java.util.Map;import java.util.Set;import net.sf.cglib.beans.BeanGenerator;import net.sf.cglib.beans.BeanMap;/** * * <p> * Title: CglibBean.java * </p> * <p> * E-Mail: 176291935@qq.com * </p> * <p> * QQ: 176291935 * </p> * <p> * Http: iaiai.iteye.com * </p> * <p> * Create time: 2011-11-16 * </p> * * @author 丸子 * @version 0.0.1 */public class CglibBean {/** * 实体Object */public Object object = null;/** * 属性map */public BeanMap beanMap = null;public CglibBean() {super();}@SuppressWarnings("unchecked")public CglibBean(Map propertyMap) {this.object = generateBean(propertyMap);this.beanMap = BeanMap.create(this.object);}public CglibBean(String className,Map propertyMap) {this.object = generateBean(className,propertyMap);this.beanMap = BeanMap.create(this.object);}/** * 给bean属性赋值 * * @param property * 属性名 * @param value * 值 */public void setValue(String property, Object value) {beanMap.put(property, value);}/** * 通过属性名得到属性值 * * @param property * 属性名 * @return 值 */public Object getValue(String property) {return beanMap.get(property);}/** * 得到该实体bean对象 * * @return */public Object getObject() {return this.object;}private Object generateBean(Map propertyMap) {BeanGenerator generator = new BeanGenerator();Set keySet = propertyMap.keySet();for (Iterator i = keySet.iterator(); i.hasNext();) {String key = (String) i.next();generator.addProperty(key, (Class) propertyMap.get(key));}return generator.create();}private Object generateBean(final String className,Map propertyMap) {BeanGeneratorObj generator = new BeanGeneratorObj();generator.setNamingPolicy(new NamingPolicy() {@Overridepublic String getClassName(String prefix, String source, Object key, Predicate names) {return className;}});Set keySet = propertyMap.keySet();for (Iterator i = keySet.iterator(); i.hasNext();) {String key = (String) i.next();generator.addProperty(key, (Class) propertyMap.get(key));}return generator.create();}}package com.iaiai.test;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;/** * * <p> * Title: CglibTest.java * </p> * <p> * E-Mail: 176291935@qq.com * </p> * <p> * QQ: 176291935 * </p> * <p> * Http: iaiai.iteye.com * </p> * <p> * Create time: 2011-11-16 * </p> * * @author 丸子 * @version 0.0.1 */public class CglibTest {public static void main(String[] args) throws Exception {List<String> list = new ArrayList<String>();list.add("测试1");list.add("测试2");Map<String, Object> map = new HashMap<String, Object>();map.put("test1", "map value1");map.put("test2", "map value2");// 设置类成员属性Map propertyMap = new HashMap();propertyMap.put("id", Class.forName("java.lang.Integer"));propertyMap.put("name", Class.forName("java.lang.String"));propertyMap.put("address", Class.forName("java.lang.String"));propertyMap.put("age", Class.forName("java.lang.Long"));propertyMap.put("list", Class.forName("java.util.List"));propertyMap.put("map", Class.forName("java.util.Map"));// 生成动态 BeanCglibBean bean = new CglibBean("com.iaiai.BaseObject",propertyMap);// 给 Bean 设置值bean.setValue("id", new Integer(123));bean.setValue("name", "454");bean.setValue("address", "789");bean.setValue("age", new Long(321));bean.setValue("list", list);bean.setValue("map", map);// 从 Bean 中获取值，当然了获得值的类型是 ObjectSystem.out.println(" >> class = " + bean.getObject().getClass());System.out.println(" >> id = " + bean.getValue("id"));System.out.println(" >> name = " + bean.getValue("name"));System.out.println(" >> address = " + bean.getValue("address"));System.out.println(" >> age = " + bean.getValue("age"));System.out.println(" >> list instanceof = " + (bean.getValue("list") instanceof List));System.out.println(" >> list.size = " + ((List) bean.getValue("list")).size());System.out.println(" >> list[0] = " + ((List) bean.getValue("list")).get(0));System.out.println(" >> map instanceof = " + (bean.getValue("map") instanceof Map));System.out.println(" >> map.size = " + ((Map) bean.getValue("map")).size());System.out.println(" >> map.value = " + ((Map) bean.getValue("map")).get("test1"));// 获得bean的实体Object object = bean.getObject();// 通过反射查看所有方法名Class clazz = object.getClass();Method[] methods = clazz.getDeclaredMethods();for (int i = 0; i < methods.length; i++) {System.out.println(methods[i].getName());}System.out.println("********************");test(object);}private static void test(Object obj) throws Exception {// 设置类成员属性HashMap propertyMap = new HashMap();propertyMap.put("id", Class.forName("java.lang.Integer"));propertyMap.put("name", Class.forName("java.lang.String"));propertyMap.put("address", Class.forName("java.lang.String"));propertyMap.put("object", obj.getClass());// 生成动态 BeanCglibBean bean = new CglibBean("com.iaiai.BaseObject1",propertyMap);// 给 Bean 设置值bean.setValue("id", new Integer(1232));bean.setValue("name", "4542");bean.setValue("address", "7892");bean.setValue("object", obj);// 从 Bean 中获取值，当然了获得值的类型是 ObjectSystem.out.println(" >> class = " + bean.getObject().getClass());System.out.println(" >> id = " + bean.getValue("id"));System.out.println(" >> name = " + bean.getValue("name"));System.out.println(" >> address = " + bean.getValue("address"));System.out.println(" >> object = " + bean.getValue("object"));System.out.println(" >> object instanceof String = " + (bean.getValue("object") instanceof String));System.out.println(" >> object instanceof Object= " + (bean.getValue("object") instanceof Object));Class cls = bean.getObject().getClass();System.out.println("&&&&&&&&&&&&&&&&&&&&&&&&&&&&");Field[] fields = cls.getDeclaredFields();for(Field field:fields){System.out.println(field.getName());}}}