[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; ?y@pRe$2
} l(4./M
int i1=l; !qve1H4d2
int i2=mid+1; >maz t=,
for(int cur=l;cur<=r;cur++){ YL0RQa
if(i1==mid+1) - & r{%7
data[cur]=temp[i2++]; lB@K;E@r8
else if(i2>r) 7Wn]l!
data[cur]=temp[i1++]; $ayD55W4
else if(temp[i1] data[cur]=temp[i1++]; X/749"23
else sxa (
data[cur]=temp[i2++]; "S#hzrEdYI
} `d#_66TLr
} `"4EE}eQc
j`lK}
} #JM*QVzv
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改进后的归并排序: NebZGD2K
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package org.rut.util.algorithm.support; vkmR cX:/
an~Kc!Oki
import org.rut.util.algorithm.SortUtil; OSU=O
IQ8AsV&'C
/** ;Yj&7k1
* @author treeroot YgDasKFm'
* @since 2006-2-2 0l*/_;wo
* @version 1.0 GjBQxn
*/ VUy 1?n
public class ImprovedMergeSort implements SortUtil.Sort { f#mpd]e+6
1XRVbQt
private static final int THRESHOLD = 10; en)DN3
THVF@@q
/* .jw)e!<\N
* (non-Javadoc) )=@ XF0
* ^bGi_YC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RJM(+5xQ|
*/ cPSu!u}D
public void sort(int[] data) { hRu%> =7
int[] temp=new int[data.length]; 3WS %H17
mergeSort(data,temp,0,data.length-1); 50A_+f.7%
} uv!/DX#
%iv'/B8
private void mergeSort(int[] data, int[] temp, int l, int r) { :nt%z0_
int i, j, k; hyp`6?f
int mid = (l + r) / 2; OoNAW<
if (l == r) &V L<Rx
return; I(e>ff
if ((mid - l) >= THRESHOLD) *RO ~%g
mergeSort(data, temp, l, mid); *(rE<
else [#tW$^UD
insertSort(data, l, mid - l + 1); _1~Sj*
if ((r - mid) > THRESHOLD) -#r_9HQ,w
mergeSort(data, temp, mid + 1, r); *HRRv.iQ
else #LZ`kSlv4
insertSort(data, mid + 1, r - mid); @N$r'@
)Jc>l;G(M
for (i = l; i <= mid; i++) { E9i WGSE
temp = data; q%"nk
} TJ<PT
for (j = 1; j <= r - mid; j++) { \r2w@F{C
temp[r - j + 1] = data[j + mid]; fITml6mbE
} ~gf$ L9
int a = temp[l]; >Et?7@
int b = temp[r]; ) E\pQ5&
for (i = l, j = r, k = l; k <= r; k++) { ATU@5,9
if (a < b) { UpITx]y?"m
data[k] = temp[i++]; aj\'qRrU$
a = temp; B@4#y9`5
} else { L%DL n
data[k] = temp[j--]; xfzR>NU
b = temp[j]; _C4^J
} La!PGZ{
} R8KL4g-d
} Pzqgg43Xf
X}ZOjX!
/** UaBR;v-.B3
* @param data 3"".kf,O5e
* @param l sk5\"jna
* @param i Rm RV8 WJ6
*/ }XUHP%
private void insertSort(int[] data, int start, int len) { @6E[K'5c1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X:Zqgf
} yU\|dL
} B}Qo8i7 z
} z7CYYU?
} >eXNw}_j
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堆排序： `>*P(yIN
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package org.rut.util.algorithm.support; P$Dr6;
]u:NE'0Xy
import org.rut.util.algorithm.SortUtil; {r"s.|n
4 (yHD
/** dug RO[
* @author treeroot zh6so.
* @since 2006-2-2 kSDV#8uZ
* @version 1.0 1ID!rxE
*/ Ii9vA ^53
public class HeapSort implements SortUtil.Sort{ j}|6k6t
z/TRqD
/* (non-Javadoc) BP7_o63/G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ka5>9E
*/ YP6+o#==
public void sort(int[] data) { $&4Zw6"=
MaxHeap h=new MaxHeap(); 5!Guf?i
h.init(data); s)C.e# xl
for(int i=0;i h.remove(); _V;J7Vz
System.arraycopy(h.queue,1,data,0,data.length); wjl?@K
} Kb}N!<Z*
QW!'A`*x
private static class MaxHeap{ y0Tb/&xN
LC}]6
void init(int[] data){ (]pQ.3
this.queue=new int[data.length+1]; O-7 \qz
for(int i=0;i queue[++size]=data; hOq1"kL
fixUp(size); ' Sl9xd
} E>ev/6ox
} g5cR.]oz
|h'ugx1iY
private int size=0; |XsW)/
cx02b-O
private int[] queue; .`iq+i~
l"-D@]"
public int get() { oU2RxK->u
return queue[1]; K)k!`du!6
} YziQU_
cx$Oh`-Car
public void remove() { vb%\q sf
SortUtil.swap(queue,1,size--); tpVtbh1)u
fixDown(1); ]6nF>C-C
} VTF),e!
file://fixdown )j$Bo{
private void fixDown(int k) { snK/,lm.
int j; [Nq4<NK
while ((j = k << 1) <= size) { H95VU"
if (j < size %26amp;%26amp; queue[j] j++; hIdGQKr>V
if (queue[k]>queue[j]) file://不用交换 9KP+
break; 7(oxmv}#Q
SortUtil.swap(queue,j,k); Q:-/@$&i
k = j; E/am^ TO`
} <l\FHJhjq
} K<t(HK#[
private void fixUp(int k) { I5e!vCG)
while (k > 1) { ^c2 8Q.<w(
int j = k >> 1; ]s<Q-/X
if (queue[j]>queue[k]) aH:eu<s
break; OLiYjYd
SortUtil.swap(queue,j,k); SsaF><{5R
k = j; SVR AkP-
} ;zGGT^Dn
} 5Ph"*Rz%
ljk-xC p/
} _Q7)FK
@P8q=j}l9
} 3U}z?gP[
]s u\[?l
SortUtil： <uAqb Wu
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package org.rut.util.algorithm; 'r-a:8:t^
kAAz|dhL-
import org.rut.util.algorithm.support.BubbleSort; h\yYg'CC
import org.rut.util.algorithm.support.HeapSort; &r_:n t
import org.rut.util.algorithm.support.ImprovedMergeSort; 5ogbse"
import org.rut.util.algorithm.support.ImprovedQuickSort; ;eWVc;H
import org.rut.util.algorithm.support.InsertSort; aB$Y5
import org.rut.util.algorithm.support.MergeSort; 2.|Y
import org.rut.util.algorithm.support.QuickSort; *z(.D\{%
import org.rut.util.algorithm.support.SelectionSort; Y!SD^Ie7!
import org.rut.util.algorithm.support.ShellSort; Pukq{/27
c,+oH<bZZs
/** `T mIrc
* @author treeroot wp@c;gK7
* @since 2006-2-2 t!K|3>w
* @version 1.0 s*S@}l
*/ \Q#F&q0
public class SortUtil { \^_F>M
public final static int INSERT = 1; NSxDCTw
public final static int BUBBLE = 2; F<I-^BY)
public final static int SELECTION = 3; 7igrRU#1%
public final static int SHELL = 4; {yJ{DU?%Y
public final static int QUICK = 5; |#S!qnXB
public final static int IMPROVED_QUICK = 6; f+)F-3
public final static int MERGE = 7; ;z&p(e
public final static int IMPROVED_MERGE = 8; 6#.R'O
public final static int HEAP = 9; l lQ<x
jx-W$@
public static void sort(int[] data) { K%Rx5 S
sort(data, IMPROVED_QUICK); ' rXkTm1{
} R=E )j^<F
private static String[] name={ 9'T(Fc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )2R:P`U
}; y<5s)OehG
t4,6`d?C
private static Sort[] impl=new Sort[]{ zJ#q*2A(Z
new InsertSort(), nc`[fy|}
new BubbleSort(), `OBDx ^6F
new SelectionSort(), $#0%gs/x
new ShellSort(), }F^c*xt[
new QuickSort(), aE:fMDS|x
new ImprovedQuickSort(), &gq\e^0CRZ
new MergeSort(), 1W;+hXx
new ImprovedMergeSort(), z/;NoQ-
new HeapSort() oW-luC+
}; "--rz;+K
Ar>-xCTD
public static String toString(int algorithm){ (0Y6tcV]R
return name[algorithm-1]; ~DCw [y
} hmks\eb~
\l#=p+x5
public static void sort(int[] data, int algorithm) { }B"kJNxV
impl[algorithm-1].sort(data); {lqnn n3
} \b' <q
bZ0r/f,n$
public static interface Sort { c.NAUe_3
public void sort(int[] data); S c@g;+#QU
} }<XeZ?;
}n8,Ga%
public static void swap(int[] data, int i, int j) { Bm^vKzp
int temp = data; Vj`9j. 5
data = data[j]; ~uV.jh
data[j] = temp; G`w7dn;&
} Tl9_Wi
} R_(A&,