[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; /Z[HU{4
} +O.qYX
int i1=l; A6 `a
int i2=mid+1; 2\;/mQI2A
for(int cur=l;cur<=r;cur++){ z;_vl
if(i1==mid+1) nzbAQ3v
data[cur]=temp[i2++]; ZT8LMPC
else if(i2>r) T|0d2aa
data[cur]=temp[i1++]; "oyBF CW
else if(temp[i1] data[cur]=temp[i1++]; \xcf<y3_
else KP7 {
data[cur]=temp[i2++]; ~Yc!~Rz
} D4uAwmc
} ?% A2
[B+:)i
} e1%kW1Z9
%?Q&a ]
改进后的归并排序: ^AiQNL}
6ud<U#\b&
package org.rut.util.algorithm.support; >0uj\5h)I]
{s@ 0<!
import org.rut.util.algorithm.SortUtil; 5:C>:pAV
m]H]0T
/** `5rfO6;
* @author treeroot Zxozhmg
* @since 2006-2-2 ZOpKi:\
* @version 1.0 /Gn0|]KI
*/ IAmZ_2
public class ImprovedMergeSort implements SortUtil.Sort { B<HN$/
L&~'SC
private static final int THRESHOLD = 10; <0qhc$M
H6Bw3I[
/* lJdYR'/Wd
* (non-Javadoc) dZI["FeO&d
* 67 ~pn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >#Xz~xI/I
*/ ;tF&r1
public void sort(int[] data) { uGm?e]7Hx<
int[] temp=new int[data.length]; =;E0PB_w
mergeSort(data,temp,0,data.length-1); [;4;.V
} M'F<1(
s|`wi}"x
private void mergeSort(int[] data, int[] temp, int l, int r) { /7fd"U$Lh
int i, j, k; l(}MM|ka
int mid = (l + r) / 2; pOh<I{r1
if (l == r) e`q*'u1?
return; =Y5m% ,Bq
if ((mid - l) >= THRESHOLD) -GM"gkz
mergeSort(data, temp, l, mid); Tj{3#?]Ho
else t\TxK7i
insertSort(data, l, mid - l + 1); .U44p*I
if ((r - mid) > THRESHOLD) W0Y ,3;0
mergeSort(data, temp, mid + 1, r); =LKM)d=1
else E|+<m!
insertSort(data, mid + 1, r - mid); %g{)K)$,ui
{cb<9Fii
for (i = l; i <= mid; i++) { yn_.
temp = data; j>uu3ADd2
} O:GAS [O`
for (j = 1; j <= r - mid; j++) { >/lB%<$/
temp[r - j + 1] = data[j + mid]; *'-t_F';
} >,h{`
int a = temp[l]; #TO^x&3@
int b = temp[r]; ByO?qft>u
for (i = l, j = r, k = l; k <= r; k++) { m7C!}l]9
if (a < b) { 3,X8 5`v^
data[k] = temp[i++]; CC;^J-h/
a = temp; /wl]kGF
} else { U_j[<.aN)
data[k] = temp[j--]; !pkIaCxs
b = temp[j]; S^|U"
} z Tz_"NI
} }/,Rp/+7]
} R!lug;u#
jzGK(%sw"
/** xI~AZ:m
* @param data Li"+`
* @param l W&&|T;P<J
* @param i 8lGM>(:o
*/ ,<)D3K<
private void insertSort(int[] data, int start, int len) { #z<#oC5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EtaKo}!A}
} ! K_<hNG&
} E_DQ.!U!o
} odC"#Rb
} yT5OFD|T
yU4mS;GX
堆排序： }.Z`
/BD'{tZ]Sl
package org.rut.util.algorithm.support; gIusp917
0@{0#W3R
import org.rut.util.algorithm.SortUtil; @rDBK] V
*|<~IQg
/** h]+;"v6 /
* @author treeroot LHXR7Fjc
* @since 2006-2-2 &5${k'
* @version 1.0 C"B'Dj
*/ Yf~Kzv1]*
public class HeapSort implements SortUtil.Sort{ `]]<.>R
4Orq;8!BW
/* (non-Javadoc) Y:L[Iz95o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R=<::2_Y96
*/ s2wDJ|
public void sort(int[] data) { F:q8.^HTJ
MaxHeap h=new MaxHeap(); bt_c$TN
h.init(data); BRskxyL&,
for(int i=0;i h.remove(); "bF52lLu
System.arraycopy(h.queue,1,data,0,data.length); QKB+mjMH#x
} 5u;//Cm
,(zV~-:9
private static class MaxHeap{ Tsj/alC[
~cfXEjE6
void init(int[] data){ *w O~RnP
this.queue=new int[data.length+1]; wy#>Aq
for(int i=0;i queue[++size]=data; &Tj7qlP\
fixUp(size); D GcpYA.7'
} ~:o$}`mW
} ipg`8*My
EU%v |]
private int size=0; cz/cY:o)
lS7L|
private int[] queue; cNxxX!P/
sxph#E%
public int get() { ,Xfu?Yan
return queue[1]; =~Qg(=U0U
} kp*!
JGTsVa2
public void remove() { SA&(%f1d
SortUtil.swap(queue,1,size--); naH(lz|v
fixDown(1); *<y9.\zY<
} DB-79U%W
file://fixdown .5o~^
private void fixDown(int k) { /|P{t{^WM
int j; f!R7v|jP
while ((j = k << 1) <= size) { %;v~MC@
if (j < size %26amp;%26amp; queue[j] j++; l9="ccM
if (queue[k]>queue[j]) file://不用交换 "aCB}
break; #k|f>D4
SortUtil.swap(queue,j,k); @6tczU}ak
k = j; adIrrK
} 6SH0 y
} *jWh4F,
private void fixUp(int k) { f$kbb6juL
while (k > 1) { n8=Dzv0
int j = k >> 1; 8IQ}%|lN
if (queue[j]>queue[k]) +hr|$
break; l!Xj UnRF
SortUtil.swap(queue,j,k); Ky,upU
k = j; `PL}8ydZ
} N>"L2E=z$|
} Z_4%Oi
*AW v
} wv."
^uN[rHZ*u
} a{Y|`*7y
3en67l
SortUtil： ~mXzQbe p
d~%7A5
package org.rut.util.algorithm; y*{zX=]l<
gN:F50
import org.rut.util.algorithm.support.BubbleSort; 7x>^ip"7
import org.rut.util.algorithm.support.HeapSort; M'<% d[
import org.rut.util.algorithm.support.ImprovedMergeSort; >!s<JKhI
import org.rut.util.algorithm.support.ImprovedQuickSort; D6Aa5&rO+
import org.rut.util.algorithm.support.InsertSort; =<p=?16 x
import org.rut.util.algorithm.support.MergeSort; BO7HJF)a
import org.rut.util.algorithm.support.QuickSort; c1s&
import org.rut.util.algorithm.support.SelectionSort; 1.3dy]vG
import org.rut.util.algorithm.support.ShellSort; 43B0ynagN
I[\7Bf
/** xatq
* @author treeroot lGWz
* @since 2006-2-2 U'(zKqC
* @version 1.0 9t)Hi qj
*/ *8?2+)5"
public class SortUtil { L@s6u+uu
public final static int INSERT = 1; hx9t{Zi
public final static int BUBBLE = 2; LOcZadr
public final static int SELECTION = 3; !37I2*+4
public final static int SHELL = 4; oo &|(+"O_
public final static int QUICK = 5; df@NV Ld
public final static int IMPROVED_QUICK = 6; yTg|L9
public final static int MERGE = 7; U\:Y*Ai
public final static int IMPROVED_MERGE = 8; @9_mk@
public final static int HEAP = 9; {G x=QNd
{\0V$#q
public static void sort(int[] data) { @XM*N7
sort(data, IMPROVED_QUICK); 'Gc{cNbXIA
} Z^%a 1>`
private static String[] name={ 6A]I" E]5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6P717[
}; DMG'8\5C
.Vnb+o
private static Sort[] impl=new Sort[]{ 4xbWDu]
new InsertSort(), =dA]nM
new BubbleSort(), oj Y.6w
new SelectionSort(), ~nmFZ]y
new ShellSort(), X5/fy"g&
new QuickSort(), 6[ 3 K@
new ImprovedQuickSort(), "q M
new MergeSort(), JfWkg`LqL
new ImprovedMergeSort(), axvZA:l
new HeapSort() ph6'(,
}; tyW}=xs
~^a>C
public static String toString(int algorithm){ OHBCanZZ,
return name[algorithm-1]; [niFJIsc
} R3_OCM_*
[.xY>\e
public static void sort(int[] data, int algorithm) { Vlz\n
impl[algorithm-1].sort(data); Lg!E
} K=0xR*ll5
4sQm"XgE
public static interface Sort { :FS5BT$=
public void sort(int[] data); b7\>=
} fb`x1Q
c:.5@eq^
public static void swap(int[] data, int i, int j) { "kFH*I+v
int temp = data; pIC'nO_
data = data[j]; +vxf_*0;
data[j] = temp; \)t//0
} d;l%XZe
} sGhw23