41 lines
1.7 KiB
Java
41 lines
1.7 KiB
Java
|
package cn.iocoder.dashboard.util.sping;
|
||
|
|
|
||
|
|
import org.aspectj.lang.ProceedingJoinPoint;
|
||
|
|
import org.aspectj.lang.reflect.MethodSignature;
|
||
|
|
import org.springframework.core.DefaultParameterNameDiscoverer;
|
||
|
|
import org.springframework.expression.EvaluationContext;
|
||
|
|
import org.springframework.expression.Expression;
|
||
|
|
import org.springframework.expression.spel.standard.SpelExpressionParser;
|
||
|
|
import org.springframework.expression.spel.support.StandardEvaluationContext;
|
||
|
|
|
||
|
|
import java.lang.reflect.Method;
|
||
|
|
|
||
|
|
public class SpElUtil {
|
||
|
|
|
||
|
|
private SpElUtil() {
|
||
|
|
}
|
||
|
|
|
||
|
|
public static String analysisSpEl(String spElString, ProceedingJoinPoint joinPoint) {
|
||
|
|
SpelExpressionParser parser = new SpelExpressionParser();
|
||
|
|
DefaultParameterNameDiscoverer nameDiscoverer = new DefaultParameterNameDiscoverer();
|
||
|
|
// 通过joinPoint获取被注解方法
|
||
|
|
MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
|
||
|
|
Method method = methodSignature.getMethod();
|
||
|
|
// 使用spring的DefaultParameterNameDiscoverer获取方法形参名数组
|
||
|
|
String[] paramNames = nameDiscoverer.getParameterNames(method);
|
||
|
|
// 解析过后的Spring表达式对象
|
||
|
|
Expression expression = parser.parseExpression(spElString);
|
||
|
|
// spring的表达式上下文对象
|
||
|
|
EvaluationContext context = new StandardEvaluationContext();
|
||
|
|
// 通过joinPoint获取被注解方法的形参
|
||
|
|
Object[] args = joinPoint.getArgs();
|
||
|
|
// 给上下文赋值
|
||
|
|
for (int i = 0; i < args.length; i++) {
|
||
|
|
context.setVariable(paramNames[i], args[i]);
|
||
|
|
}
|
||
|
|
Object value = expression.getValue(context);
|
||
|
|
return value == null ? "null" : value.toString();
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|