方法1：通过get()方法获取属性值
package com.sxd.test.controller;
public class FirstCa{
private Integer num;
private String name;
private Boolean flag;
public Integer getNum() {
return num;
}
public void setNum(Integer num) {
this.num = num;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Boolean getFlag() {
return flag;
}
public void setFlag(Boolean flag) {
this.flag = flag;
}
}
package com.sxd.test.controller; import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap; public class Test { @org.junit.Test
public void testName() throws Exception {
FirstCa ca = new FirstCa();
ca.setFlag(true);
ca.setNum(30); Map<String,String> map = getSortMap(ca);
map.forEach((k,v)->{
System.out.println(k+">>>"+v);
});
} /**
* 使用java反射机制，动态获取对象的属性和参数值，排除值为null的情况，并按字典序排序
* @param object
* @return
* @throws Exception
*/
private Map<String, String> getSortMap(Object object) throws Exception{
Field[] fields = object.getClass().getDeclaredFields();
Map<String, String> map = new HashMap<String, String>();
//迭代属性
for(Field field : fields){
String name = field.getName();
String methodName = "get" + name.replaceFirst(name.substring(0, 1), name.substring(0, 1)
.toUpperCase());
// 调用getter方法获取属性值
// Method getter = object.getClass().getMethod(methodName);
// String value = getter.invoke(object)+""; //通过get方法直接获取属性值
field.setAccessible(true);
Object value = field.get(object);
if (value != null){
map.put(name, value.toString());
}
System.out.println("字段名："+name);
System.out.println("字段值："+field.get(object));
System.out.println("字段java语言修饰符："+field.getModifiers());
System.out.println("字段类型："+field.getType());
System.out.println("");
} Map<String, String> sortMap = new TreeMap<String, String>(
new Comparator<String>() { @Override
public int compare(String arg0, String arg1) { return arg0.compareTo(arg1);
}
});
sortMap.putAll(map);
return sortMap;
} }
Field.setAccessible(true);得作用就是让我们在用反射时访问私有变量
运行结果：
方法2： 通过属性自己的getter方法获取属性值
package com.sxd.test.controller; import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap; public class Test { @org.junit.Test
public void testName() throws Exception {
FirstCa ca = new FirstCa();
ca.setFlag(true);
ca.setNum(30); Map<String,String> map = getSortMap(ca);
map.forEach((k,v)->{
System.out.println(k+">>>"+v);
});
} /**
* 使用java反射机制，动态获取对象的属性和参数值，排除值为null的情况，并按字典序排序
* @param object
* @return
* @throws Exception
*/
private Map<String, String> getSortMap(Object object) throws Exception{
Field[] fields = object.getClass().getDeclaredFields();
Map<String, String> map = new HashMap<String, String>();
//迭代属性
for(Field field : fields){
String name = field.getName();
String methodName = "get" + name.replaceFirst(name.substring(0, 1), name.substring(0, 1)
.toUpperCase());
// 调用getter方法获取属性值
Method getter = object.getClass().getMethod(methodName);
String value = getter.invoke(object)+""; //通过get方法直接获取属性值
// field.setAccessible(true);
// Object value = field.get(object);
if (value != null && !"null".equals(value)){
map.put(name, value);
}
System.out.println("字段名："+name);
System.out.println("字段值："+value);
System.out.println("字段java语言修饰符："+field.getModifiers());
System.out.println("字段类型："+field.getType());
System.out.println("");
} Map<String, String> sortMap = new TreeMap<String, String>(
new Comparator<String>() { @Override
public int compare(String arg0, String arg1) { return arg0.compareTo(arg1);
}
});
sortMap.putAll(map);
return sortMap;
} }
运行结果：