Question

我有3个由外键连接的表。我需要通过连接所有表来获取数据。以下是我的3个实体类。

Stock.java

[]

StockDetl.java

@Entity
public class Stock {
    private int id;
    private Date entryDate;
    private int entryUserId;
    private BigDecimal parValue;
    private int status;
    private Timestamp statusChgDate;
    private int statusChgUserId;
    private String stockName;
    private String stockSymbol;

    @Id
    @Column(name = "Id", nullable = false)
    public int getId() {
        return id;
    }

    @Basic
    @Column(name = "EntryDate", nullable = false)
    public Date getEntryDate() {
        return entryDate;
    }

    @Basic
    @Column(name = "EntryUserID", nullable = false)
    public int getEntryUserId() {
        return entryUserId;
    }

    @Basic
    @Column(name = "ParValue", nullable = false, precision = 2)
    public BigDecimal getParValue() {
        return parValue;
    }

    @Basic
    @Column(name = "Status", nullable = false)
    public int getStatus() {
        return status;
    }

    @Basic
    @Column(name = "StatusChgDate", nullable = false)
    public Timestamp getStatusChgDate() {
        return statusChgDate;
    }

    @Basic
    @Column(name = "StatusChgUserID", nullable = false)
    public int getStatusChgUserId() {
        return statusChgUserId;
    }

    @Basic
    @Column(name = "StockName", nullable = false, length = 100)
    public String getStockName() {
        return stockName;
    }

    @Basic
    @Column(name = "StockSymbol", nullable = false, length = 15)
    public String getStockSymbol() {
        return stockSymbol;
    }

    ... setters ...
}

StockPriceMast.java

@Entity
public class StockPriceDetl {
    private int id;
    private BigDecimal amount;
    private BigDecimal closingPrice;
    private BigDecimal diffAmount;
    private BigDecimal maxPrice;
    private BigDecimal minPrice;
    private int numberOfTransaction;
    private BigDecimal previousClosingPrice;
    private Timestamp statusChgDate;
    private int statusChgUserId;
    private int tradedShares;
    private Stock stockByStockId;

    @Id
    @Column(name = "Id", nullable = false)
    public int getId() {
        return id;
    }

    @Basic
    @Column(name = "Amount", nullable = false, precision = 2)
    public BigDecimal getAmount() {
        return amount;
    }

    @Basic
    @Column(name = "ClosingPrice", nullable = false, precision = 2)
    public BigDecimal getClosingPrice() {
        return closingPrice;
    }

    @Basic
    @Column(name = "DiffAmount", nullable = false, precision = 2)
    public BigDecimal getDiffAmount() {
        return diffAmount;
    }

    @Basic
    @Column(name = "MaxPrice", nullable = false, precision = 2)
    public BigDecimal getMaxPrice() {
        return maxPrice;
    }

    @Basic
    @Column(name = "MinPrice", nullable = false, precision = 2)
    public BigDecimal getMinPrice() {
        return minPrice;
    }

    @Basic
    @Column(name = "NumberOfTransaction", nullable = false)
    public int getNumberOfTransaction() {
        return numberOfTransaction;
    }

    @Basic
    @Column(name = "PreviousClosingPrice", nullable = false, precision = 2)
    public BigDecimal getPreviousClosingPrice() {
        return previousClosingPrice;
    }

    @Basic
    @Column(name = "StatusChgDate", nullable = false)
    public Timestamp getStatusChgDate() {
        return statusChgDate;
    }

    @Basic
    @Column(name = "StatusChgUserID", nullable = false)
    public int getStatusChgUserId() {
        return statusChgUserId;
    }

    @Basic
    @Column(name = "TradedShares", nullable = false)
    public int getTradedShares() {
        return tradedShares;
    }

    @ManyToOne
    @JoinColumn(name = "StockId", referencedColumnName = "Id", nullable = false)
    public Stock getStockByStockId() {
        return stockByStockId;
    }

    ... setters ...
}

此处客户端将发送@Entity public class StockPriceMast { private int id; private Date entryDate; private int entryUserId; private String remarks; private int status; private Timestamp statusChgDate; private int statusChgUserId; private Date tranDate; @Id @Column(name = "Id") public int getId() { return id; } @Basic @Column(name = "EntryDate") public Date getEntryDate() { return entryDate; } @Basic @Column(name = "EntryUserID") public int getEntryUserId() { return entryUserId; } @Basic @Column(name = "Remarks") public String getRemarks() { return remarks; } @Basic @Column(name = "Status") public int getStatus() { return status; } @Basic @Column(name = "StatusChgDate") public Timestamp getStatusChgDate() { return statusChgDate; } @Basic @Column(name = "StatusChgUserID") public int getStatusChgUserId() { return statusChgUserId; } @Basic @Column(name = "TranDate") public Date getTranDate() { return tranDate; } ... setters ... }和两个日期。我需要填写某些日期的maxprice，minprice，closingprice和previousclosingPrice，比如说01/01/2001到01/01/2002（Trandate on stockprice mast）。

我如何使用hibernate来做到这一点？我希望实现的SQL查询。

StockSymbol

Answer 1

您是否考虑过JPA-Repositories。在那里，您可以将SQL定义为以下方法：

import com.netflix.discovery.converters.wrappers.CodecWrappers;
import com.netflix.discovery.converters.wrappers.DecoderWrapper;
import com.netflix.discovery.converters.wrappers.EncoderWrapper;
import com.netflix.discovery.provider.DiscoveryJerseyProvider;
import com.netflix.discovery.shared.MonitoredConnectionManager;
import com.netflix.discovery.shared.transport.jersey.EurekaJerseyClient;
import com.netflix.discovery.shared.transport.jersey.EurekaJerseyClientImpl;
import com.netflix.discovery.shared.transport.jersey.SSLSocketFactoryAdapter;
import com.netflix.discovery.util.DiscoveryBuildInfo;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.client.apache4.config.ApacheHttpClient4Config;
import com.sun.jersey.client.apache4.config.DefaultApacheHttpClient4Config;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.impl.conn.SchemeRegistryFactory;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.util.TextUtils;

public class CustomEurekaJerseyClientBuilder {
private boolean systemSSL;
private String clientName;
private int maxConnectionsPerHost;
private int maxTotalConnections;
private String trustStoreFileName;
private String trustStorePassword;
private String userAgent;
private String proxyUserName;
private String proxyPassword;
private String proxyHost;
private String proxyPort;
private int connectionTimeout;
private int readTimeout;
private int connectionIdleTimeout;
private EncoderWrapper encoderWrapper;
private DecoderWrapper decoderWrapper;

public CustomEurekaJerseyClientBuilder withClientName(String clientName) {
    this.clientName = clientName;
    return this;
}

public CustomEurekaJerseyClientBuilder withUserAgent(String userAgent) {
    this.userAgent = userAgent;
    return this;
}

public CustomEurekaJerseyClientBuilder withConnectionTimeout(int connectionTimeout) {
    this.connectionTimeout = connectionTimeout;
    return this;
}

public CustomEurekaJerseyClientBuilder withReadTimeout(int readTimeout) {
    this.readTimeout = readTimeout;
    return this;
}

public CustomEurekaJerseyClientBuilder withConnectionIdleTimeout(int connectionIdleTimeout) {
    this.connectionIdleTimeout = connectionIdleTimeout;
    return this;
}

public CustomEurekaJerseyClientBuilder withMaxConnectionsPerHost(int maxConnectionsPerHost) {
    this.maxConnectionsPerHost = maxConnectionsPerHost;
    return this;
}

public CustomEurekaJerseyClientBuilder withMaxTotalConnections(int maxTotalConnections) {
    this.maxTotalConnections = maxTotalConnections;
    return this;
}

public CustomEurekaJerseyClientBuilder withProxy(String proxyHost, String proxyPort, String user, String password) {
    this.proxyHost = proxyHost;
    this.proxyPort = proxyPort;
    this.proxyUserName = user;
    this.proxyPassword = password;
    return this;
}

public CustomEurekaJerseyClientBuilder withSystemSSLConfiguration() {
    this.systemSSL = true;
    return this;
}

public CustomEurekaJerseyClientBuilder withTrustStoreFile(String trustStoreFileName, String trustStorePassword) {
    this.trustStoreFileName = trustStoreFileName;
    this.trustStorePassword = trustStorePassword;
    return this;
}

public CustomEurekaJerseyClientBuilder withEncoder(String encoderName) {
    return this.withEncoderWrapper(CodecWrappers.getEncoder(encoderName));
}

public CustomEurekaJerseyClientBuilder withEncoderWrapper(EncoderWrapper encoderWrapper) {
    this.encoderWrapper = encoderWrapper;
    return this;
}

public CustomEurekaJerseyClientBuilder withDecoder(String decoderName, String clientDataAccept) {
    return this.withDecoderWrapper(CodecWrappers.resolveDecoder(decoderName, clientDataAccept));
}

public CustomEurekaJerseyClientBuilder withDecoderWrapper(DecoderWrapper decoderWrapper) {
    this.decoderWrapper = decoderWrapper;
    return this;
}

public EurekaJerseyClient build() {
    MyDefaultApacheHttpClient4Config config = new MyDefaultApacheHttpClient4Config();
    try {
        return new EurekaJerseyClientImpl(connectionTimeout, readTimeout, connectionIdleTimeout, config);
    } catch (Throwable e) {
        throw new RuntimeException("Cannot create Jersey client ", e);
    }
}

class MyDefaultApacheHttpClient4Config extends DefaultApacheHttpClient4Config {

    private static final String PROTOCOL = "https";
    private static final String PROTOCOL_SCHEME = "SSL";
    private static final int HTTPS_PORT = 443;
    private static final String KEYSTORE_TYPE = "JKS";

    MyDefaultApacheHttpClient4Config() {
        MonitoredConnectionManager cm;

        if (systemSSL) {
            cm = createSystemSslCM();
        } else {
            cm = createDefaultSslCM();
        }

        if (proxyHost != null) {
            addProxyConfiguration(cm);
        }

        DiscoveryJerseyProvider discoveryJerseyProvider = new DiscoveryJerseyProvider(encoderWrapper, decoderWrapper);
        getSingletons().add(discoveryJerseyProvider);

        // Common properties to all clients
        cm.setDefaultMaxPerRoute(maxConnectionsPerHost);
        cm.setMaxTotal(maxTotalConnections);
        getProperties().put(ApacheHttpClient4Config.PROPERTY_CONNECTION_MANAGER, cm);

        String fullUserAgentName = (userAgent == null ? clientName : userAgent) + "/v" + DiscoveryBuildInfo.buildVersion();
        getProperties().put(CoreProtocolPNames.USER_AGENT, fullUserAgentName);

        // To pin a client to specific server in case redirect happens, we handle redirects directly
        // (see DiscoveryClient.makeRemoteCall methods).
        getProperties().put(ClientConfig.PROPERTY_FOLLOW_REDIRECTS, Boolean.FALSE);
        getProperties().put(ClientPNames.HANDLE_REDIRECTS, Boolean.FALSE);
    }

    private void addProxyConfiguration(MonitoredConnectionManager cm) {
        if (proxyUserName != null && proxyPassword != null) {
            getProperties().put(ApacheHttpClient4Config.PROPERTY_PROXY_USERNAME, proxyUserName);
            getProperties().put(ApacheHttpClient4Config.PROPERTY_PROXY_PASSWORD, proxyPassword);
        } else {
            // Due to bug in apache client, user name/password must always be set.
            // Otherwise proxy configuration is ignored.
            getProperties().put(ApacheHttpClient4Config.PROPERTY_PROXY_USERNAME, "guest");
            getProperties().put(ApacheHttpClient4Config.PROPERTY_PROXY_PASSWORD, "guest");
        }
        getProperties().put(DefaultApacheHttpClient4Config.PROPERTY_PROXY_URI, "http://" + proxyHost + ":" + proxyPort);
    }

    private MonitoredConnectionManager createSystemSslCM() {
        MonitoredConnectionManager cm;
        X509HostnameVerifier hostnameVerifier = SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER;
        SSLConnectionSocketFactory systemSocketFactory = new SSLConnectionSocketFactory(
                (javax.net.ssl.SSLSocketFactory) javax.net.ssl.SSLSocketFactory.getDefault(),
                split(System.getProperty("https.protocols")),
                split(System.getProperty("https.cipherSuites")),
                hostnameVerifier);
        SSLSocketFactory sslSocketFactory = new SSLSocketFactoryAdapter(systemSocketFactory);
        SchemeRegistry sslSchemeRegistry = new SchemeRegistry();
        sslSchemeRegistry.register(new Scheme(PROTOCOL, HTTPS_PORT, sslSocketFactory));
        cm = new MonitoredConnectionManager(clientName, sslSchemeRegistry);
        return cm;
    }

    /**
     * @see SchemeRegistryFactory#createDefault()
     */
    private MonitoredConnectionManager createDefaultSslCM() {
        final SchemeRegistry registry = new SchemeRegistry();
        registry.register(
                new Scheme("http", 80, PlainSocketFactory.getSocketFactory()));
        registry.register(
                new Scheme("https", 443, new SSLSocketFactoryAdapter(SSLConnectionSocketFactory.getSocketFactory())));
        return new MonitoredConnectionManager(clientName, registry);
    }

    private String[] split(final String s) {
        if (TextUtils.isBlank(s)) {
            return null;
        }
        return s.split(" *, *");
    }
}
}

如何使用spring和hibernate从3个表中获取数据？

1 个答案: