利用java反射过滤类对象

package com.farrand.velocity.entity;

public class VelocityUser {

private Integer id;

private String username;

private String password;

public Integer getId() {

return id;

}

public void setId(Integer id) {

this.id = id;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

}

package com.farrand.struts.action;

import java.lang.reflect.Method;

import org.apache.commons.lang.StringEscapeUtils;

import com.farrand.velocity.entity.VelocityUser;

public class Test {

private static String clzName;

/**

* 构造方法

* @param asClzName

* 要过滤的类名字

*/

public Test(String asClzName) {

Test.clzName = asClzName;

}

/**

* 用于取得被过滤后的类的方法

* @return 返回类型为Object

*/

public static Object getPropFilteredClz(Object classNameObj, Object[] obj) {

try {

Class clz = Class.forName(clzName);

Method[] methods = clz.getDeclaredMethods();

Object lsTemp = null;

for (int i = 0; i < methods.length; i++) {

if (methods[i].getName().startsWith("g")) {

// 反射调用get***方法

String methodSetName = methods[i].getName().replace("get", "set");

Method setMethod = clz.getMethod(methodSetName, methods[i].invoke(classNameObj, obj).getClass());

if (methods[i].invoke(classNameObj, obj) instanceof String) {

lsTemp = StringEscapeUtils.escapeHtml((methods[i].invoke(classNameObj, obj).toString()));

} else {

lsTemp = methods[i].invoke(classNameObj, obj);

}

setMethod.invoke(classNameObj, lsTemp);

}

}

} catch (Exception ex) {

// TODO

}

// 返回过滤后的类的实例

return classNameObj;

}

public static Object getPropFilteredClz(Object classNameObj) {

Object propFilteredObj = getPropFilteredClz(classNameObj, null);

return propFilteredObj;

}

public static void main(String[] args) {

// 此处为测试方法,比如传入的类型名为VelocityUser

VelocityUser userInfo = new VelocityUser();

userInfo.setId(5);

userInfo.setUsername("wan<br>mei");

userInfo.setPassword("shijie");

new Test("com.farrand.velocity.entity.VelocityUser");

// 此处过滤返回后，类型转换为VelocityUser型对象

VelocityUser mzk = (VelocityUser) Test.getPropFilteredClz(userInfo);

System.out.println("过滤后id：" + mzk.getId());

System.out.println("过滤后username：" + mzk.getUsername());

System.out.println("过滤后password：" + mzk.getPassword());

}

}

运行结果：

过滤后id：5
过滤后username：wan<br>mei
过滤后password：shijie