update

jinpengyong

2020-08-19 dad714704451fbcc04b48d4efcb460410e7a8aa0

 src/main/java/com/moral/common/util/ExampleUtil.java

@@ -5,6 +5,7 @@
import lombok.extern.log4j.Log4j;
import tk.mybatis.mapper.entity.Example;

import javax.validation.constraints.NotNull;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
@@ -18,9 +19,13 @@

@Log4j
public class ExampleUtil {
    private final static String OR_SPLIT = "or\\|";
    private final static String CRITERIA_SPLIT = "\\|\\|\\|";
    private final static String CONDITION_SPLIT = "\\|\\|";
    private final static String SPLIT = "\\|";
    private final static String OR = "_OR";
    private final static String OR_SPLIT = OR+SPLIT;
    private final static String CRITERIA = "_CR";
    private final static String CRITERIA_SPLIT = CRITERIA+SPLIT;
    private final static String CONDITION = "_CO";
    private final static String CONDITION_SPLIT = CONDITION+SPLIT;
    private static Map<String, Method> criteriaMethodMap = new ConcurrentHashMap<>();
    private static void setOrderByClause(Example example,String orderByClause) throws UnsupportedEncodingException, NoSuchFieldException {
           orderByClause = URLDecoder.decode(orderByClause,"UTF-8");
@@ -55,40 +60,7 @@
            }
            if(!StringUtils.isNullOrEmpty(params)){
                params = URLDecoder.decode(params, "UTF-8");
                if (!StringUtils.isNullOrEmpty(params) && params.startsWith("or|")) {
                    String[] criteria = params.trim().split(OR_SPLIT);
                    for (String criterion : criteria) {
                        // criterion为null或""跳过
                        if(StringUtils.isNullOrEmpty(criterion)) { continue;};
                        Example.Criteria criteriaOfExample = example.or();
                        if (!StringUtils.isNullOrEmpty(criterion)) {
                            String[] conditions = criterion.trim().split(CRITERIA_SPLIT);
                            for (String condition : conditions) {
                                if (!StringUtils.isNullOrEmpty(condition)) {
                                    String[] conditionItems = condition.split(CONDITION_SPLIT);
                                    if (conditionItems != null && conditionItems.length > 1) {
                                        //方法名
                                        String methodName = conditionItems[0];
                                        //属性名
                                        String propertyName = conditionItems[1];
                                        //参数列表
                                        List values = new ArrayList<Object>();
                                        if (conditionItems.length > 2) {
                                            for (int index = 2; index < conditionItems.length; index++) {
                                                values.add(conditionItems[index]);
                                            }
                                        }
                                        Method method = getExampleMethod(methodName,values.size()+1);
                                        if (method != null && (methodName.equals("andCondition")||isPropertyOfClass(clazz, propertyName))) {
                                            invokeMethod(criteriaOfExample,method,propertyName,values);
                                        }

                                    }
                                }
                            }
                        }
                    }
                }
                loadCriterias(example,params);
            }
            if(!isDelete) {
                addDeletesToExample(example,clazz);
@@ -99,34 +71,67 @@
        }
        return example;
    }

    private static void invokeMethod(Object obj, Method method,String propertyName,List values) throws InvocationTargetException, IllegalAccessException {
        int len = values.size();
        switch (len) {
            case 0:
                if(method.getParameterCount()==1) {
                    method.invoke(obj, propertyName);
                }
                break;
            case 1:

                if(method.getParameterCount()==2){
                    method.invoke(obj,propertyName,values.get(0));
                }
                break;
            //between 查询
            case 2:
                if(method.getParameterCount()==3){
                    method.invoke(obj,propertyName,values.toArray());
                }
                break;
            //in 查询
            default:
                if(method.getParameterCount()==2){
                method.invoke(obj,propertyName,values);
                }
                break;
    private static void loadCriterias(Example example,String params) throws InvocationTargetException, IllegalAccessException {
        if (params.startsWith(OR)) {
            String[] criteria = params.trim().split(OR_SPLIT);
            for (String criterion : criteria) {
                // criterion为null或""跳过
                if(StringUtils.isNullOrEmpty(criterion)) { continue;};
                Example.Criteria criteriaOfExample = example.or();
                loadConditions(example,criteriaOfExample,criterion);
            }
        }
    }
    private static void loadConditions(Example example,Example.Criteria criteriaOfExample,String criterion) throws InvocationTargetException, IllegalAccessException {
        String[] conditions = criterion.trim().split(CRITERIA_SPLIT);
        for (String condition : conditions) {
            if (!StringUtils.isNullOrEmpty(condition)) {
                String[] conditionItems = condition.split(CONDITION_SPLIT);
                if (conditionItems != null && conditionItems.length > 1) {
                    //方法名
                    String methodName = conditionItems[0];
                    //属性名
                    String propertyName = conditionItems[1];
                    //参数列表
                    List values = new ArrayList<Object>();
                    if (conditionItems.length > 2) {
                        for (int index = 2; index < conditionItems.length; index++) {
                            values.add(conditionItems[index]);
                        }
                    }
                    Method method = getExampleMethod(methodName,values.size()+1);
                    if (method != null && (methodName.equals("andCondition")||isPropertyOfClass(example.getEntityClass(), propertyName))) {
                        invokeMethod(criteriaOfExample,method,propertyName,values);
                    } else {
                        log.warn(condition+"  can't be executed as condition");
                    }
                }
            }
        }
    }
    private static boolean validatetParameters(@NotNull Method method,int len) {
        //前端传递propertyName参数为string类型
        return  method.getParameterCount() == (len+1) && method.getParameterTypes()[0].equals(String.class);
    }
    private static void invokeMethod(@NotNull Object obj,@NotNull Method method,@NotNull String propertyName,@NotNull List values) throws InvocationTargetException, IllegalAccessException {
        int len = values.size();
            switch (len) {
                case 0:
                    method.invoke(obj, propertyName);
                    break;
                case 1:
                    Object value = values.get(0) == "null" ? null : values.get(0);
                    method.invoke(obj, propertyName,value);
                    break;
                //between 查询
                case 2:
                    method.invoke(obj, propertyName, values.toArray());
                    break;
                //in 查询
                default:
                    method.invoke(obj, propertyName, values);
                    break;
            }
    }

    ;
@@ -176,6 +181,9 @@
                }
            }
        }
        if(methodTemp==null || validatetParameters(methodTemp,paramCount)){
            return null;
        }
        return methodTemp;
    }
}