java利用反射执行字符串方法_java springboot反射字符串获取代码执行-优快云博客

本文链接：https://blog.youkuaiyun.com/ml5271169588/article/details/77895051

本文介绍了一个使用Java反射机制动态调用类方法的例子。通过解析字符串形式的方法签名，找到对应的方法并传递参数进行调用。示例中定义了一个City类，并通过反射设置了其属性。

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import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class TestMethod {
public static void main(String[] args) throws NoSuchMethodException,
SecurityException, IllegalAccessException,
IllegalArgumentException, InvocationTargetException {
TestMethod testMethod = new TestMethod();
TestMethod.City city = testMethod.new City();
String name = "setName(成都)";
String code = "setCode(chengdu)";
testMethod.dotMethod(name, city);
testMethod.dotMethod(code, city);
System.out.println(city.getName() + "," + city.getCode());
}

private void dotMethod(String methodStr, Object obj)
throws NoSuchMethodException, SecurityException,
IllegalAccessException, IllegalArgumentException,
InvocationTargetException {
// 拆解方法字符串，找出方法名
String methodName = methodStr.substring(0, methodStr.indexOf('('));
// 找出参数
String[] args = null;
String paramStr = methodStr.substring(methodStr.indexOf('(') + 1,
methodStr.indexOf(')'));
if (!paramStr.isEmpty()) {
String[] tmp = paramStr.split(",");
args = tmp;
}
Class c = obj.getClass();
Method method = c.getMethod(methodName, String.class);
method.invoke(obj, args[0]);
}

public class City {
private String name;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getCode() {
return code;
}

public void setCode(String code) {
this.code = code;
}

private String code;
}
}