com.eshore.tools.Beans Maven / Gradle / Ivy
package com.eshore.tools;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
//import javax.persistence.Column;
//import javax.persistence.EnumType;
//import javax.persistence.Enumerated;
public class Beans {
//final Logger logger = LoggerFactory.getLogger(Beans.class);
private static Map conver = new HashMap();
private static Class javaxPersistenceColumn;
private static Class javaxPersistenceEnumType;
private static Class javaxPersistenceEnumerated;
private static boolean jpaApi=false;
static{
init();
}
public static void init(){
try{
javaxPersistenceColumn=Class.forName("javax.persistence.Column");
javaxPersistenceEnumType=Class.forName("javax.persistence.EnumType");
javaxPersistenceEnumerated=Class.forName("javax.persistence.Enumerated");
jpaApi=true;
}catch(Exception e){}
}
@SuppressWarnings("unchecked")
public static Object getBean(Map values, Class clazz)
throws InstantiationException, IllegalAccessException,
IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
Object dest = clazz.newInstance();
Map convers =getCoverMap(clazz);// (Map) conver.get(clazz);
Method[] method = clazz.getMethods();
/**
* 给实例填充
*/
for (int i = 0; i < method.length; i++) {
Method meth = method[i];
/**
* 当不是set的
*/
if (!meth.getName().startsWith("set"))
continue;
/**
* 当没有参数或参数个数大于1个时跳过
*/
// Type types[]= meth.getGenericParameterTypes();
// if(types==null||types.length>1)continue;
String name = meth.getName().substring(3).toUpperCase();
field f = (field) convers.get(name);
if (f == null)
continue;
if (f.dbName != null)
name = f.dbName;
Object param = f.conver(values.get(name));
if (param == null)
continue;
meth.invoke(dest, param);
}
return dest;
}
public static Map toDBMap(Object o) throws Exception{
Class clazz=o.getClass();
Method[] method = clazz.getMethods();
Map cmap = getCoverMap(clazz);
Map vmap = new HashMap();
for (int i = 0; i < method.length; i++) {
Method meth = method[i];
if (!meth.getName().startsWith("get"))
continue;
if("getClass".equals(meth.getName()))continue;
String name = meth.getName().toUpperCase().substring(3);
field f = (field) cmap.get(name);
if (f == null)
continue;
if (f.dbName != null)
name = f.dbName;
try{
Object v=meth.invoke(o, null);
vmap.put(name, v);
}catch(Exception e){}
}
return vmap;
}
private static Map getCoverMap(Class clazz) throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException{
Map convers = (Map) conver.get(clazz);
if (convers == null) {
Method[] method = clazz.getMethods();
convers = new HashMap();
conver.put(clazz, convers);
for (int i = 0; i < method.length; i++) {
Method meth = method[i];
if (!meth.getName().startsWith("get"))
continue;
boolean isColumn = false;
if(jpaApi){
isColumn=meth.isAnnotationPresent(javaxPersistenceColumn);
}
Type type = meth.getGenericReturnType();
field f = new field();
f.type = type;
f.name = meth.getName().substring(3);
f.dbName = f.name.toUpperCase();
f.get=meth;
if (isColumn) {
Object column = meth.getAnnotation(javaxPersistenceColumn);
Method nm=javaxPersistenceColumn.getMethod("name");
String name =(String) nm.invoke(column); //column.name().toUpperCase();
if(name!=null)name=name.toUpperCase();
f.dbName = name;
}
if(jpaApi&&meth.isAnnotationPresent(javaxPersistenceEnumerated)){
Object enumerated = meth.getAnnotation(javaxPersistenceEnumerated);
Method nm=javaxPersistenceColumn.getMethod("value");
String type1 =""+ nm.invoke(enumerated);
//EnumType type1= enumerated.value();
try {
Method valueOf= ((Class)meth.getGenericReturnType()).getMethod("valueOf",new Class[]{String.class});
Method vs= ((Class)meth.getGenericReturnType()).getMethod("values",new Class[]{});
f.valueOf=valueOf;
f.values=vs;
f.isEnum=true;
f.isEnumString=type1.toLowerCase().indexOf("string")>-1;//equals(EnumType.STRING);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
}
}
convers.put((meth.getName().substring(3)).toUpperCase(), f);
}
Field [] fs = clazz.getDeclaredFields();
if(fs!=null)
for (Field f: fs) {
String name = "set"+f.getName();
field t = (field) convers.get(name.toUpperCase());
if(t!=null){
if(jpaApi&&f.isAnnotationPresent(javaxPersistenceColumn)){
//Column column = f.getAnnotation(Column.class);
Object column = f.getAnnotation(javaxPersistenceColumn);
Method nm=javaxPersistenceColumn.getMethod("name");
String dbname =(String) nm.invoke(column); //column.name().toUpperCase();
if(dbname!=null)dbname=dbname.toUpperCase();
//String dbname = column.name().toUpperCase();
t.dbName = dbname;
}
if(jpaApi&&f.isAnnotationPresent(javaxPersistenceEnumerated)){
/*
Enumerated enumerated = f.getAnnotation(Enumerated.class);
EnumType type= enumerated.value();
*/
Object enumerated =f.getAnnotation(javaxPersistenceEnumerated);
Method nm=javaxPersistenceColumn.getMethod("value");
String type1 =""+ nm.invoke(enumerated);
try {
Method valueOf= f.getType().getMethod("valueOf",new Class[]{String.class});
Method vs= f.getType().getMethod("values",new Class[]{});
t.valueOf=valueOf;
t.values=vs;
t.isEnum=true;
t.isEnumString=type1.indexOf("string")>-1;//type.equals(EnumType.STRING);
//enumTarget=
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
}
}
}
}
}
return convers;
}
}
/**
* 转换的字
*
* @author eric
*
*/
class field {
Type type;
String dbName;
String name;
Method get;
Method set;
boolean isEnum=false;
boolean isEnumString=true;
Method valueOf;
Method values;
Object enumTarget;
/**
* 把其它�?转换成目标类�?
*
* @param o
* @return
*/
Object conver(Object o) {
if (o == null)
return null;
Object dest = null;
// 字符
if(isEnum){
if(isEnumString){
String st=o.toString();
try {
return valueOf.invoke(null,new Object[]{st});
} catch (Exception e) {
//e.printStackTrace();
/**
* 支持 type/name 方式的 Enum
*/
try{
Object[] vs = (Object[]) values.invoke(null, new Object[0]);
for(Object en :vs){
Object type = getField(en,"type");
if(type!=null&&type.equals(st)){
return en;
}
}
}catch(Exception ex){}
return null;
}
}else{
Integer i = (Integer) parseInt(o);
if(i==null)return null;
try {
Object[] vs = (Object[]) values.invoke(null, new Object[0]);
if(vs!=null&&vs.length>i){
return vs[i];
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}else
if (type == String.class) {
if (o instanceof String) {
dest = o;
} else {
dest = o.toString();
}
} else if (Integer.class.equals(type) || int.class.equals(type)) {
dest = this.parseInt(o);
} else if (Double.class.equals(type) || double.class.equals(type)) {
dest = this.parseDouble(o);
} else if (Short.class.equals(type) || short.class.equals(type)) {
dest = this.parseShort(o);
} else if (Float.class.equals(type) || float.class.equals(type)) {
dest = this.parseFloat(o);
} else if (Date.class.equals(type)) {
dest = this.parseDate(o);
} else if (boolean.class.equals(type) || Boolean.class.equals(type)) {
dest = this.parseBoolean(o);
}else if(BigDecimal.class.equals(type)){
return new BigDecimal(o.toString());
}
return dest;
}
private Object parseInt(Object o) {
if (o == null)
return null;
if (o instanceof Integer) {
return o;
} else {
try {
double dv = Double.parseDouble(o.toString().trim());
return (int) dv;
} catch (Exception e) {
return null;
}
}
}
private Object parseDouble(Object o) {
if (o == null)
return null;
if (o instanceof Double) {
return o;
} else {
try {
return Double.parseDouble(o.toString().trim());
} catch (Exception e) {
return null;
}
}
}
private Object parseShort(Object o) {
if (o == null)
return null;
if (o instanceof Short) {
return o;
} else {
try {
return (short) Double.parseDouble(o.toString().trim());
} catch (Exception e) {
return null;
}
}
}
@SuppressWarnings("unused")
private Object parseLong(Object o) {
if (o == null)
return null;
if (o instanceof Long) {
return o;
} else {
try {
return (long) Double.parseDouble(o.toString().trim());
} catch (Exception e) {
return null;
}
}
}
private Object parseBoolean(Object o) {
if (o == null)
return null;
if (o instanceof Boolean) {
return o;
} else {
try {
return Double.parseDouble(o.toString().trim()) > 0;
} catch (Exception e) {
return null;
}
}
}
private Object parseFloat(Object o) {
if (o == null)
return null;
if (o instanceof Float) {
return o;
} else {
try {
return (float) Double.parseDouble(o.toString().trim());
} catch (Exception e) {
return null;
}
}
}
private Object parseDate(Object o) {
if (o == null)
return null;
if (o instanceof Date) {
return o;
} else {
return converToDate(o.toString());
}
}
public static Date converToDate(String dateString) {
return StringValue.toDate(dateString);
}
public static Object getField(Object o,String name){
try {
Field f = getField1(o,name);
if(f!=null){
f.setAccessible(true);
return f.get(o);
}
} catch (Exception e) {
// TODO Auto-generated catch block
//e.printStackTrace();
}
return null;
}
private static Field getField1(Object object,String name){
for(Class clazz = object.getClass(); clazz != Object.class; clazz = clazz.getSuperclass()) {
try {
Field f = clazz.getDeclaredField(name) ;
return f ;
} catch (Exception e) {
//这里甚么都不要做！并且这里的异常必须这样写，不能抛出去。
//如果这里的异常打印或者往外抛，则就不会执行clazz = clazz.getSuperclass(),最后就不会进入到父类中了
}
}
return null;
}
}
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