【未解决】spring security 有时不会注入 Principal ？

问题：已经的 filter 中写入了

SecurityContextHolder.getContext().setAuthentication(auth);

1	SecurityContextHolder.getContext().setAuthentication(auth);

但是… Read More

【未解决】Spring JPA 竟然自动保存

问题：

@Service
public class T1Service {
    @Autowired
    T1Repo t1Repo;

    @Transactional
    public void test(int id) {
        T1 t1 = t1Repo.getOne(id);
        t1.setName("tt" + new Date());
    }
}

@Service

public class T1Service {

@Autowired

T1Repo t1Repo;

@Transactional

public void test(int id) {

T1 t1 = t1Repo.getOne(id);

t1.setName("tt" + new Date());

}

虽然没有 t1Repo… Read More

spring data jpa @Onetoone 出现了 1+n query

问题 Issue. article 是 @OneToOne 但是取 issue.article 时还会去se… Read More

加入 taobao sdk 后 maven compile 卡住

一直编译中解决：调试发现一直在扫描 taobao jar 包里边的东西解压 taobao… Read More

apache client https 禁止证书检测

解决：

    /**
     * 绕过验证
     *
     * @return
     * @throws NoSuchAlgorithmException
     * @throws KeyManagementException
     */
    static SSLContext createIgnoreVerifySSL() throws NoSuchAlgorithmException, KeyManagementException {
        SSLContext sc = SSLContext.getInstance("SSLv3");

        // 实现一个X509TrustManager接口，用于绕过验证，不用修改里面的方法
        X509TrustManager trustManager = new X509TrustManager() {
            @Override
            public void checkClientTrusted(
                    java.security.cert.X509Certificate[] paramArrayOfX509Certificate,
                    String paramString) throws CertificateException {
            }

            @Override
            public void checkServerTrusted(
                    java.security.cert.X509Certificate[] paramArrayOfX509Certificate,
                    String paramString) throws CertificateException {
            }

            @Override
            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };

        sc.init(null, new TrustManager[]{trustManager}, null);
        return sc;
    }

    public static CloseableHttpClient ignoreSSLClient() throws KeyManagementException, NoSuchAlgorithmException {
//采用绕过验证的方式处理https请求
        SSLContext sslcontext = HttpUtils.createIgnoreVerifySSL();

        //设置协议http和https对应的处理socket链接工厂的对象
        Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
                .register("http", PlainConnectionSocketFactory.INSTANCE)
                .register("https", new SSLConnectionSocketFactory(sslcontext))
                .build();
        PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
        HttpClients.custom().setConnectionManager(connManager);

        //创建自定义的httpclient对象
        CloseableHttpClient client = HttpClients.custom().setConnectionManager(connManager).build();
        return client;
    }

/**

* 绕过验证

* @return

* @throws NoSuchAlgorithmException

* @throws KeyManagementException

static SSLContext createIgnoreVerifySSL() throws NoSuchAlgorithmException, KeyManagementException {

SSLContext sc = SSLContext.getInstance("SSLv3");

// 实现一个X509TrustManager接口，用于绕过验证，不用修改里面的方法

X509TrustManager trustManager = new X509TrustManager() {

@Override

public void checkClientTrusted(

java.security.cert.X509Certificate[] paramArrayOfX509Certificate,

String paramString) throws CertificateException {

}

@Override

public void checkServerTrusted(

java.security.cert.X509Certificate[] paramArrayOfX509Certificate,

String paramString) throws CertificateException {

}

@Override

public java.security.cert.X509Certificate[] getAcceptedIssuers() {

return null;

}

};

sc.init(null, new TrustManager[]{trustManager}, null);

return sc;

}

public static CloseableHttpClient ignoreSSLClient() throws KeyManagementException, NoSuchAlgorithmException {

//采用绕过验证的方式处理https请求

SSLContext sslcontext = HttpUtils.createIgnoreVerifySSL();

//设置协议http和https对应的处理socket链接工厂的对象

Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()

.register("http", PlainConnectionSocketFactory.INSTANCE)

.register("https", new SSLConnectionSocketFactory(sslcontext))

.build();

PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);

HttpClients.custom().setConnectionManager(connManager);

//创建自定义的httpclient对象

CloseableHttpClient client = HttpClients.custom().setConnectionManager(connManager).build();

return client;

}

&nbs… Read More

缓存注意！！serialVersionUID

https://docs.oracle.com/javase/6/docs/platform/serializ… Read More

如何定制 spring security 403 返回的错误

问题：默认返回的解决： [crayon-69342976926e… Read More

private static enum StoreFieldSetMapper implements FieldSetMapper 这种写法少见呢

/*
 * Copyright 2014 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package example.stores;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import lombok.extern.slf4j.Slf4j;

import org.springframework.batch.item.ExecutionContext;
import org.springframework.batch.item.file.FlatFileItemReader;
import org.springframework.batch.item.file.mapping.DefaultLineMapper;
import org.springframework.batch.item.file.mapping.FieldSetMapper;
import org.springframework.batch.item.file.separator.DefaultRecordSeparatorPolicy;
import org.springframework.batch.item.file.transform.DelimitedLineTokenizer;
import org.springframework.batch.item.file.transform.FieldSet;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.ClassPathResource;
import org.springframework.data.geo.Point;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.stereotype.Component;
import org.springframework.validation.BindException;

/**
 * Component initializing a hand full of Starbucks stores and persisting them through a {@link StoreRepository}.
 * 
 * @author Oliver Gierke
 */
@Slf4j
@Component
public class StoreInitializer {

	@Autowired
	public StoreInitializer(StoreRepository repository) throws Exception {

		if (repository.count() != 0) {
			return;
		}

		List<Store> stores = readStores();
		log.info("Importing {} stores into MongoDB…", stores.size());
		repository.saveAll(stores);
		log.info("Successfully imported {} stores.", repository.count());
	}

	/**
	 * Reads a file {@code starbucks.csv} from the class path and parses it into {@link Store} instances about to
	 * persisted.
	 * 
	 * @return
	 * @throws Exception
	 */
	public static List<Store> readStores() throws Exception {

		ClassPathResource resource = new ClassPathResource("starbucks.csv");
		Scanner scanner = new Scanner(resource.getInputStream());
		String line = scanner.nextLine();
		scanner.close();

		FlatFileItemReader<Store> itemReader = new FlatFileItemReader<Store>();
		itemReader.setResource(resource);

		// DelimitedLineTokenizer defaults to comma as its delimiter
		DelimitedLineTokenizer tokenizer = new DelimitedLineTokenizer();
		tokenizer.setNames(line.split(","));
		tokenizer.setStrict(false);

		DefaultLineMapper<Store> lineMapper = new DefaultLineMapper<Store>();
		lineMapper.setLineTokenizer(tokenizer);
		lineMapper.setFieldSetMapper(StoreFieldSetMapper.INSTANCE);
		itemReader.setLineMapper(lineMapper);
		itemReader.setRecordSeparatorPolicy(new DefaultRecordSeparatorPolicy());
		itemReader.setLinesToSkip(1);
		itemReader.open(new ExecutionContext());

		List<Store> stores = new ArrayList<>();
		Store store = null;

		do {

			store = itemReader.read();

			if (store != null) {
				stores.add(store);
			}

		} while (store != null);

		return stores;
	}

	private static enum StoreFieldSetMapper implements FieldSetMapper<Store> {

		INSTANCE;

		/* 
		 * (non-Javadoc)
		 * @see org.springframework.batch.item.file.mapping.FieldSetMapper#mapFieldSet(org.springframework.batch.item.file.transform.FieldSet)
		 */
		@Override
		public Store mapFieldSet(FieldSet fields) throws BindException {

			Point location = new Point(fields.readDouble("Longitude"), fields.readDouble("Latitude"));
			Address address = new Address(fields.readString("Street Address"), fields.readString("City"),
					fields.readString("Zip"), location);

			return new Store(fields.readString("Name"), address);
		}
	}
}

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* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

package example.stores;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

import lombok.extern.slf4j.Slf4j;

import org.springframework.batch.item.ExecutionContext;

import org.springframework.batch.item.file.FlatFileItemReader;

import org.springframework.batch.item.file.mapping.DefaultLineMapper;

import org.springframework.batch.item.file.mapping.FieldSetMapper;

import org.springframework.batch.item.file.separator.DefaultRecordSeparatorPolicy;

import org.springframework.batch.item.file.transform.DelimitedLineTokenizer;

import org.springframework.batch.item.file.transform.FieldSet;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.core.io.ClassPathResource;

import org.springframework.data.geo.Point;

import org.springframework.data.mongodb.core.MongoOperations;

import org.springframework.stereotype.Component;

import org.springframework.validation.BindException;

/**

* Component initializing a hand full of Starbucks stores and persisting them through a {@link StoreRepository}.

* @author Oliver Gierke

@Slf4j

@Component

public class StoreInitializer {

@Autowired

public StoreInitializer(StoreRepository repository) throws Exception {

if (repository.count() != 0) {

return;

}

List<Store> stores = readStores();

log.info("Importing {} stores into MongoDB…", stores.size());

repository.saveAll(stores);

log.info("Successfully imported {} stores.", repository.count());

}

/**

* Reads a file {@code starbucks.csv} from the class path and parses it into {@link Store} instances about to

* persisted.

* @return

* @throws Exception

public static List<Store> readStores() throws Exception {

ClassPathResource resource = new ClassPathResource("starbucks.csv");

Scanner scanner = new Scanner(resource.getInputStream());

String line = scanner.nextLine();

scanner.close();

FlatFileItemReader<Store> itemReader = new FlatFileItemReader<Store>();

itemReader.setResource(resource);

// DelimitedLineTokenizer defaults to comma as its delimiter

DelimitedLineTokenizer tokenizer = new DelimitedLineTokenizer();

tokenizer.setNames(line.split(","));

tokenizer.setStrict(false);

DefaultLineMapper<Store> lineMapper = new DefaultLineMapper<Store>();

lineMapper.setLineTokenizer(tokenizer);

lineMapper.setFieldSetMapper(StoreFieldSetMapper.INSTANCE);

itemReader.setLineMapper(lineMapper);

itemReader.setRecordSeparatorPolicy(new DefaultRecordSeparatorPolicy());

itemReader.setLinesToSkip(1);

itemReader.open(new ExecutionContext());

List<Store> stores = new ArrayList<>();

Store store = null;

do {

store = itemReader.read();

if (store != null) {

stores.add(store);

}

} while (store != null);

return stores;

}

private static enum StoreFieldSetMapper implements FieldSetMapper<Store> {

INSTANCE;

* (non-Javadoc)

* @see org.springframework.batch.item.file.mapping.FieldSetMapper#mapFieldSet(org.springframework.batch.item.file.transform.FieldSet)

@Override

public Store mapFieldSet(FieldSet fields) throws BindException {

Point location = new Point(fields.readDouble("Longitude"), fields.readDouble("Latitude"));

Address address = new Address(fields.readString("Street Address"), fields.readString("City"),

fields.readString("Zip"), location);

return new Store(fields.readString("Name"), address);

}

&… Read More

【未解决】springboot bean init-method 不灵光呢

问题：下列代码不会调用 init 方法

@Component
//@RequestScope
@Scope(scopeName = "prototype", proxyMode = ScopedProxyMode.TARGET_CLASS)
public class RequestOpContext implements InitializingBean {
    int i = 0;
    public RequestOpContext(){
        System.out.println("RequestOpContext()");
    }

    public void init(){
        System.out.println("init");
        i=10;
    }

    public int getId(){
        return i;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        init();
    }
}

@Component

//@RequestScope

@Scope(scopeName = "prototype", proxyMode = ScopedProxyMode.TARGET_CLASS)

public class RequestOpContext implements InitializingBean {

int i = 0;

public RequestOpContext(){

System.out.println("RequestOpContext()");

}

public void init(){

System.out.println("init");

i=10;

}

public int getId(){

return i;

}

@Override

public void afterPropertiesSet() throws Exception {

init();

}

&… Read More

JDK11.0.3 module java.base does not “opens jdk.internal.reflect” to unnamed module @4f757cf6

问题： JDK11.0.3 报错，11.0.2 还正常 Caused by: java.lang.reflec… Read More

IT问题

程序员的疑难杂症录

Java

【未解决】spring security 有时不会注入 Principal ？

【未解决】Spring JPA 竟然自动保存

spring data jpa @Onetoone 出现了 1+n query

加入 taobao sdk 后 maven compile 卡住

apache client https 禁止证书检测

缓存注意！！serialVersionUID

如何定制 spring security 403 返回的错误

private static enum StoreFieldSetMapper implements FieldSetMapper 这种写法少见呢

【未解决】springboot bean init-method 不灵光呢

JDK11.0.3 module java.base does not “opens jdk.internal.reflect” to unnamed module @4f757cf6