[JAVA]用Java实现的各种排序

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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; JK:mQ_
} mNnw G);$
int i1=l; \AtwO
int i2=mid+1; Kl46CZs#8
for(int cur=l;cur<=r;cur++){ HM$`z"p5jg
if(i1==mid+1) }!Diai*C
data[cur]=temp[i2++]; N[ Lz 0c?
else if(i2>r) Y|0-m#1F#
data[cur]=temp[i1++]; /_VRO9R\V
else if(temp[i1] data[cur]=temp[i1++]; qm'C^X?
else fa+W9
data[cur]=temp[i2++]; C#**)
} ;Xd\$)n
} ^pQo`T6
k+q6U[ce
} OnPy8mC
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改进后的归并排序: e??{&[
/|u]Y/ *
package org.rut.util.algorithm.support; }x#P<d(
wc+N
import org.rut.util.algorithm.SortUtil; rlO%%Qn`
Dt~}9HrU
/** QIMv9;
* @author treeroot +U_-Lq )
* @since 2006-2-2 \xO2WD
* @version 1.0 X!+Mgh6
*/ |B{$URu
public class ImprovedMergeSort implements SortUtil.Sort { ,5A>:2 zs
"{ QHWZ
private static final int THRESHOLD = 10; Nh\8+v*+{
DKVt8/vq
/* {DXZ}7w:v
* (non-Javadoc) yu?s5
* "<.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5#9Wd9LP
*/ &zh+:TRm
public void sort(int[] data) { M9 2~iM
int[] temp=new int[data.length]; J! 6z
mergeSort(data,temp,0,data.length-1); |b-Zy~6
} ad$Qs3)6o
M%5$-;6~_
private void mergeSort(int[] data, int[] temp, int l, int r) { g7U:A0Z
int i, j, k; !NAX6m
int mid = (l + r) / 2; 7f\^VG
if (l == r) zloaU
return; SJ[@fUxO)
if ((mid - l) >= THRESHOLD) \(>$mtS:
mergeSort(data, temp, l, mid); Kf?{GNE7
else F;Xq:e8
insertSort(data, l, mid - l + 1); 6P*)rye
if ((r - mid) > THRESHOLD) +|"n4iZ!)
mergeSort(data, temp, mid + 1, r); DN8pJa
else &!YH"{b
insertSort(data, mid + 1, r - mid); qnfRN'
?n9$,-^v
for (i = l; i <= mid; i++) { ma-Y'
temp = data; pTX'5
} ZesD(
for (j = 1; j <= r - mid; j++) { >'|xQjLl
temp[r - j + 1] = data[j + mid]; RBD7mpd
} >3 .ep},
int a = temp[l]; K!: ,l
int b = temp[r]; zHs
for (i = l, j = r, k = l; k <= r; k++) { ][5p.owJse
if (a < b) { Ah>krE0t
data[k] = temp[i++]; 4^NHf|UJH
a = temp; wIR[2&b
} else { 13&>w{S}
data[k] = temp[j--]; K<L%@[gi
b = temp[j]; &?g!}Ky \
} ]xLb )Z
} >scS wT
} ^R'!\m|FR
'TN{8~Gt*
/** n#4J]Z@
* @param data 0l1]QD+Gc5
* @param l :*Ggz|
* @param i h7]]F{r5
*/ x5 ~E'~_
private void insertSort(int[] data, int start, int len) { vlN. OQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P[P72WR
} So 6cm|{
} [;#.DH]
} t02"v4_i
} l`%} {3r9
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堆排序： x[>_I1TJ
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package org.rut.util.algorithm.support; boOw K?
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import org.rut.util.algorithm.SortUtil; ~m|?! ]n
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/** QRHm|f9_C
* @author treeroot 8v=47G
* @since 2006-2-2 IC-xCzR
* @version 1.0 y{?jr$js<
*/ FuiW\=^
public class HeapSort implements SortUtil.Sort{ {uM{5GSL
;_\
/* (non-Javadoc) pbvEIa-Y4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5)v^ cR?&
*/ _]ttKT(
public void sort(int[] data) { ulSTR f
MaxHeap h=new MaxHeap(); h%^kA@3F
h.init(data); Lpbn@y26<
for(int i=0;i h.remove(); RMt vEa
System.arraycopy(h.queue,1,data,0,data.length); kGqf@ I+
} ,L:)ZZgN
h_G7T1;L
private static class MaxHeap{ (dipKs?K
,h`D(,?X
void init(int[] data){ V1>94/waa
this.queue=new int[data.length+1]; *Z2Q]?:{ i
for(int i=0;i queue[++size]=data; nkj'AH"2
fixUp(size); 842+KLS
} 2b,TkG8K
} `6sQlCOnF
%R"/`N9R,
private int size=0; yaYt/?|
>`|uc
private int[] queue; &2]D+aL|h
>T^v4A
public int get() { r8?Lr-;
return queue[1]; : 8<^rP
} X/7_mU>aKT
7CMgvH)O
public void remove() { cH-Zj
SortUtil.swap(queue,1,size--); n4&j<zAV{
fixDown(1); ']Xx#U N
} (g:W|hS
file://fixdown <\~#\A=;
private void fixDown(int k) { B@vH1T
int j; .mrRv8>$
while ((j = k << 1) <= size) { "wC5hj]
if (j < size %26amp;%26amp; queue[j] j++; f4I9H0d;!
if (queue[k]>queue[j]) file://不用交换 HbSx}bM_9
break; K$5P_~;QL
SortUtil.swap(queue,j,k); `gs,JJ6N
k = j; Ru aJ9O
} ?8}jJw2H
} SW'KYzn
private void fixUp(int k) { qm5pEort
while (k > 1) { j77}{5@p
int j = k >> 1; ~MQf($]
if (queue[j]>queue[k]) Q%1;{5
break; T2; 9
SortUtil.swap(queue,j,k); q.F1Jj
k = j; Ol[IC
} <!(n5y_
} CHw_?#h
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} #p`7gFl
, tj7'c$0
} 9d}nyJ
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SortUtil： 5g2+Ar(
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package org.rut.util.algorithm; :{Z^ _;Tf
B:.;:AEbT
import org.rut.util.algorithm.support.BubbleSort; Ud*[2Oi|R
import org.rut.util.algorithm.support.HeapSort; <ijmkNVS
import org.rut.util.algorithm.support.ImprovedMergeSort; Z[bC@y[Wb
import org.rut.util.algorithm.support.ImprovedQuickSort; :P"Gym
import org.rut.util.algorithm.support.InsertSort; rO%+)M$A
import org.rut.util.algorithm.support.MergeSort; G_mu7w
import org.rut.util.algorithm.support.QuickSort; }PL
import org.rut.util.algorithm.support.SelectionSort; Tic9ri
import org.rut.util.algorithm.support.ShellSort; 6&0a?Xu
B[X6AQj}d
/** to=##&ld<
* @author treeroot i}"JCqo2
* @since 2006-2-2 D}3fx[
* @version 1.0 Vp^sER
*/ H,~In2Z
public class SortUtil { uhLmyK
public final static int INSERT = 1; bC-x`a@
public final static int BUBBLE = 2; 2Hwf:S'
public final static int SELECTION = 3; a8aqcDs>O
public final static int SHELL = 4; #8OqX*/
public final static int QUICK = 5; 4O^1gw
public final static int IMPROVED_QUICK = 6; e,UgTxZ
public final static int MERGE = 7; ^D[;JV
public final static int IMPROVED_MERGE = 8; k>hZ
public final static int HEAP = 9; k8V0-.UL}
Wh_c<E}&
public static void sort(int[] data) { CI'5JOqP
sort(data, IMPROVED_QUICK); E/;YhFb[
} BZshTP[`
private static String[] name={ 5xUPqW%3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y<(.,Nb8
}; TaT&x_v^~a
nCB3d[/B
private static Sort[] impl=new Sort[]{ *?fBmq[j
new InsertSort(), 1<|I[EI
new BubbleSort(), P[i/o#
new SelectionSort(), cfS]C_6d
new ShellSort(), nHjwT5Q+Q
new QuickSort(), gMn)<u>
new ImprovedQuickSort(), jQ}|]pj+
new MergeSort(), sTyGi1
new ImprovedMergeSort(), /^G+vhlf\
new HeapSort() @CDRbXoFk
}; ^umAfk5r?H
rnE'gH(V'
public static String toString(int algorithm){ Su#1yw>
return name[algorithm-1]; *2;3~8Y
} L 3@wdC~0
c= uORt>
public static void sort(int[] data, int algorithm) { Yg.u8{H
impl[algorithm-1].sort(data); :tG5~sK
} Q.\ovk~,a
xRN$cZC
public static interface Sort { I5?LD=tt
public void sort(int[] data); 9~I WGj?
} _P1-d`b0 a
j"s(?
public static void swap(int[] data, int i, int j) { 2Wtfx" .y
int temp = data; DlI|~
data = data[j]; +Wc[$,vk
data[j] = temp; 9k&$bC+Q
} do7{
} `^vD4qD|