2019独角兽企业重金招聘Python工程师标准>>> 
package com.sohu.smc.test;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.Connection;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
public class MySqlTest {
static String str = "中国Chinaasdsaiuhdiusankjxnbsiudisabxisaiuaiushxnaiuiusax";
public static String compress(String str) throws IOException {
if (str == null || str.length() == 0) {
return str;
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
GZIPOutputStream gzip = new GZIPOutputStream(out);
gzip.write(str.getBytes());
gzip.close();
return out.toString("ISO-8859-1");
}
public static String uncompress(String str) throws IOException {
if (str == null || str.length() == 0) {
return str;
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
ByteArrayInputStream in = new ByteArrayInputStream(
str.getBytes("ISO-8859-1"));
GZIPInputStream gunzip = new GZIPInputStream(in);
byte[] buffer = new byte[256];
int n;
while ((n = gunzip.read(buffer)) >= 0) {
out.write(buffer, 0, n);
}
// toString()使用平台默认编码，也可以显式的指定如toString("GBK")
return out.toString();
}
static void query() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(
"jdbc:mysql:///", "",
"");
Statement statement = conn.createStatement();
ResultSet rs = statement.executeQuery("select * from test");
while (rs.next()) {
ByteArrayInputStream strtianliang = (ByteArrayInputStream) rs
.getBlob("desc0").getBinaryStream();
byte[] byte_data = new byte[strtianliang.available()];
strtianliang.read(byte_data, 0, byte_data.length);
String result = new String(byte_data);
System.out.println("result uncompress :" + uncompress(result));
}
rs.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (conn != null) {
try {
conn.close();
conn = null;
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
static void insert() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(
"");
PreparedStatement st = null;
String str0 = compress(str);
String sql = "insert into test(desc0) values(?)";
st = conn.prepareStatement(sql);
byte[] str0s = str0.getBytes();
InputStream bastr = new ByteArrayInputStream(str0s);
st.setBinaryStream(1, bastr, str0s.length);
st.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (conn != null) {
try {
conn.close();
conn = null;
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
public static void main(String[] args) throws Exception {
insert();
System.out.println("-----------------------------------");
query();
}
}