[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; hA@zoIoe
} nped
int i1=l; lN);~|IOv7
int i2=mid+1; ?$<SCN=
for(int cur=l;cur<=r;cur++){ d-hbvLn
if(i1==mid+1) jVX._bEGX
data[cur]=temp[i2++]; s0gJ f[
else if(i2>r) n)tU9@4Np
data[cur]=temp[i1++]; B:e.gtM5
else if(temp[i1] data[cur]=temp[i1++]; vAi"$e
else vz6SCGg,
data[cur]=temp[i2++]; JR/W9i
} ''_,S,.a20
} 1pWk9Xuh
"=9-i-K9B
} .JNcY]V#
XQK^$Iq]V
改进后的归并排序: A)OdQFet(
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package org.rut.util.algorithm.support; 9Kc0&?q@D
+VwV5iy[`
import org.rut.util.algorithm.SortUtil; h{\t*U54'
D`V6&_.p
/** +z+F-
* @author treeroot et@">D%;]
* @since 2006-2-2 '^hsH1
* @version 1.0 :]EP@.(
*/ =\M)6"}y}
public class ImprovedMergeSort implements SortUtil.Sort { }bZ 8-v
@o`sf-8x
private static final int THRESHOLD = 10; +IvNyj|
VxNXd?
/* uH$oGY
* (non-Javadoc) !syU]Yk
* a/#+92C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m[8IEKo
*/ 5$anqGw
public void sort(int[] data) { Cm^Ylp
int[] temp=new int[data.length]; 2>g^4(
mergeSort(data,temp,0,data.length-1); 7@JjjV
} vxb@9eb!H
x,w8r+~5
private void mergeSort(int[] data, int[] temp, int l, int r) { yXkt:O,i
int i, j, k; _0w1kqW
int mid = (l + r) / 2; j]AekI4I
if (l == r) Z?-;.G*
return; [9LxhPi
if ((mid - l) >= THRESHOLD) 6Ux[,]GK
mergeSort(data, temp, l, mid); '[%jjUU
else ?qy*s3j'M
insertSort(data, l, mid - l + 1); Jl\'V
if ((r - mid) > THRESHOLD) 3]N q@t
mergeSort(data, temp, mid + 1, r); wXz\NGW
else Qy/uB$q{A
insertSort(data, mid + 1, r - mid); *E.LP1xP
z23#G>I&
for (i = l; i <= mid; i++) { 46ILs1T6
temp = data; ;"D~W#0-v
} ]}.0el{
for (j = 1; j <= r - mid; j++) { {yTpRQN~
temp[r - j + 1] = data[j + mid]; Cc2MYm8
} :Pc(DfkS
int a = temp[l]; [M`=HhJ4
int b = temp[r]; XJc ,uj7
for (i = l, j = r, k = l; k <= r; k++) { C1tb`
if (a < b) { \Fq1^ 8qa
data[k] = temp[i++]; hv3;irK]&
a = temp; 9YAM#LBTWi
} else { *-6?
data[k] = temp[j--]; &m'?*O |
b = temp[j]; D'<$ g
} dbCNhbN(
} Oc#>QZ3
} W8y$Ve8m
r|<6Aae&
/** r5[4h'f
* @param data vG2.]?
* @param l Nfg{,/O
* @param i .8K6C]gw
*/ =x1Wii$`
private void insertSort(int[] data, int start, int len) { Z/gsCYS3F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 76_<xUt{
} lirNYJ]tO
} !W~QT}
} ,[Ag~.T
} 1&|
EsTB(9c?
堆排序： mzz$`M1
f9a$$nb3`
package org.rut.util.algorithm.support; ;?zF6zvQ
\X5 3|Y;=
import org.rut.util.algorithm.SortUtil; _W}(!TKO
^zgacn
/** 2[ksi51y
* @author treeroot ?~Pv3'%d
* @since 2006-2-2 Y([d;_#P
* @version 1.0 _KN: o10U
*/ (n,N8k;
public class HeapSort implements SortUtil.Sort{ $~G@
'$?du~L-
/* (non-Javadoc) 'AWp6L@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F5U|9<
*/ sBU_Ft
public void sort(int[] data) { N}DL(-SQ3
MaxHeap h=new MaxHeap(); ' Rc#^U*n
h.init(data); Z%OW5]q
for(int i=0;i h.remove(); b)`pZiQP
System.arraycopy(h.queue,1,data,0,data.length); {yS;NU`2
} ws[/
7E\g &R.
private static class MaxHeap{ T)~!mifX
-=a[J;'q
void init(int[] data){ \E77SO,$
this.queue=new int[data.length+1]; (0R2T"/
for(int i=0;i queue[++size]=data; Im+7<3Z
fixUp(size); Yz\ N&0"
} X8Fzs!L`
} BPewc9RxV
P$OUi!"
private int size=0; xCq'[9oU
tDt :^Bc
private int[] queue; 1x{kl01m%
_C$X04bU3V
public int get() { XXm'6xD-
return queue[1]; bcn7,ht
} bb1f/C%
7]Rk+q2:
public void remove() { |z*>ixK
SortUtil.swap(queue,1,size--); #x)8f3I
fixDown(1); (hN?:q?'
} zSXA=
file://fixdown Ha)np
private void fixDown(int k) { =k_UjwgN^
int j; mX;H((
while ((j = k << 1) <= size) { Cfv]VQQE
if (j < size %26amp;%26amp; queue[j] j++; p/&HUQQk
if (queue[k]>queue[j]) file://不用交换 P0 b4Hq3
break; ({ k7#1 h8
SortUtil.swap(queue,j,k); X}W)3v
k = j; ^1 ;BiQ
} P,ydt
} ^V.'^=l
private void fixUp(int k) { )i-gs4[(QN
while (k > 1) { Mq'IkSt'
int j = k >> 1; vxVOcO9<
if (queue[j]>queue[k]) V{ |[oIp
break; `ET& VV
SortUtil.swap(queue,j,k); oM-[B h]A
k = j; Sc_5FX\Yx
} D5L{T+}Oi%
} i*CnoQH
5\'AD^{
} d.AC%&W
:,~K]G
} Ww`&i
(f>M &..
SortUtil： n[CoS
M*`hDdS
package org.rut.util.algorithm; 2(+P[(N1,
r6 }_H?j
import org.rut.util.algorithm.support.BubbleSort; h.}u?{
import org.rut.util.algorithm.support.HeapSort; (w$'o*z;(
import org.rut.util.algorithm.support.ImprovedMergeSort; H+x#gK2l
import org.rut.util.algorithm.support.ImprovedQuickSort; FmD +8=
import org.rut.util.algorithm.support.InsertSort; EO:avH.*0
import org.rut.util.algorithm.support.MergeSort; 5v|EAjB6o
import org.rut.util.algorithm.support.QuickSort; JC2*$qu J
import org.rut.util.algorithm.support.SelectionSort; taDQ65
import org.rut.util.algorithm.support.ShellSort; gDC2 >nV
L!y"d!6C
/** GTAf
* @author treeroot C:j]43`
* @since 2006-2-2 Yt{&rPv,
* @version 1.0 B}\BeFt'
*/ -N# #w=
public class SortUtil { J\A8qh8
public final static int INSERT = 1; >lLo4M 3
public final static int BUBBLE = 2; A ~&+F>Z
public final static int SELECTION = 3; X"<|Z]w
public final static int SHELL = 4; @GeHWv
public final static int QUICK = 5; :1_mfX
public final static int IMPROVED_QUICK = 6; +t"j-}xzE
public final static int MERGE = 7; 2Y+:,ud\
public final static int IMPROVED_MERGE = 8; ri=+(NKo-
public final static int HEAP = 9; >rf5)Y~f
GFL-.? 0
public static void sort(int[] data) { i/$SN-5}1
sort(data, IMPROVED_QUICK); ,YB1 y)x
} |^Kjz{
private static String[] name={ 7I >J$"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @i1q]0
}; gtYRV*^q
"8/dD]=f^a
private static Sort[] impl=new Sort[]{ 6fGK(r
new InsertSort(), 4ZI_pf
new BubbleSort(), PGX+p+wB
new SelectionSort(), (/?R9T[V&^
new ShellSort(), hSMV&Cs
new QuickSort(), &t3Jv{
new ImprovedQuickSort(), QO,+ps<
new MergeSort(), 4f {+pf^R
new ImprovedMergeSort(), f#OQ (WTJE
new HeapSort() +)gB9DoK
}; i!,HB|wQ
VMHC/jlX@r
public static String toString(int algorithm){ =x H~ww (D
return name[algorithm-1]; C*rd;+1A
} Pfan7fq+
.'lN4x
public static void sort(int[] data, int algorithm) { o, LK[Q
impl[algorithm-1].sort(data); _]o5R7[MQ
} &yLc1#H
6?o>{e7n^
public static interface Sort { *h:kmT
public void sort(int[] data); TQ'e
} ikHOqJ-,m
q%S8\bt
public static void swap(int[] data, int i, int j) { 'vlrc[|/
int temp = data; ^:z7E1~
data = data[j]; $?f]ZyZr.
data[j] = temp; 9v~5qv;
} 7\%$>< K
} v{koKQ'Y()