[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; r#w7qEtD
} /6y{?0S
int i1=l; $1zWQJd[-
int i2=mid+1; !SGRK01
for(int cur=l;cur<=r;cur++){ x=x%F;
if(i1==mid+1) +s`cXTlFrk
data[cur]=temp[i2++]; T4ugG?B*
else if(i2>r) ta x:9j|~
data[cur]=temp[i1++]; Lrr(7cH,
else if(temp[i1] data[cur]=temp[i1++]; eIlovq/X
else LZs'hA<L
data[cur]=temp[i2++]; oGg<s3;UND
} ]EDCs?,
} L 9cXgd
mC0Dj O
} D97 vfC
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改进后的归并排序: 7,alZ"%W
4,Uqcw?!F'
package org.rut.util.algorithm.support; {36N=A
{:n1|_r4Z
import org.rut.util.algorithm.SortUtil; seP h%Sa_
TA:#K
/** gCVOm-*:
* @author treeroot $cm9xW&
* @since 2006-2-2 F1M:"-bda
* @version 1.0 9p^gF2?k
*/ ty%,T.@e
public class ImprovedMergeSort implements SortUtil.Sort { ^4<&"aoo
}mUb1b
private static final int THRESHOLD = 10; h>!9N dzG
/Q:mUd
/* mWn0"1C
* (non-Javadoc) plJUQk
* r/P}j4)b7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `@0AGSzUv
*/ }&6:0l$4!
public void sort(int[] data) { "d}ey=$h4
int[] temp=new int[data.length]; fuF{8-ua
mergeSort(data,temp,0,data.length-1); (#z6w#CU(
} ^7;s4q
08%Bx~88_%
private void mergeSort(int[] data, int[] temp, int l, int r) { @+y,E-YTdV
int i, j, k; m] -cRf)9
int mid = (l + r) / 2; N:+d=G`x
if (l == r) `YMd0*
return; SdnO#J}{
if ((mid - l) >= THRESHOLD) BD^1V( I/
mergeSort(data, temp, l, mid); 2vsV:LS.
else /?z3*x
insertSort(data, l, mid - l + 1); 6'<[QoW];
if ((r - mid) > THRESHOLD) G!%8DX5
mergeSort(data, temp, mid + 1, r); J^<uo(
else ub`zS-vb
insertSort(data, mid + 1, r - mid); Jm< uE]9
jPZpJ:
for (i = l; i <= mid; i++) { ]0|A\bE\S
temp = data; 1_Av_X
} B/!/2x
for (j = 1; j <= r - mid; j++) { )DlKeiK
temp[r - j + 1] = data[j + mid]; fYh<S
} N&Ho$,2s
int a = temp[l]; )t\aB_ =
int b = temp[r]; K"X"2c1o
for (i = l, j = r, k = l; k <= r; k++) { M,bs`amz
if (a < b) { 2\T\p<_20
data[k] = temp[i++]; `QW=<Le?
a = temp; 5nsoWqnE8
} else { >&7^yXS
data[k] = temp[j--]; ?`O^;f
b = temp[j]; _G25$%/LU
} E7aG&K
} n"Bc2}{
} :rjfAe=s
apfr>L3
/** iXvrZofE
* @param data (vchZn#
* @param l +"k?G
* @param i rcY &n^:
*/ l~DIV$>,Z
private void insertSort(int[] data, int start, int len) { S3E5^n\\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GCfVH?Vx
} R-1MD
} mF jM6pmo
} AS;qJ)JfzQ
} |')PQ
ha 2=O
堆排序： %:;g|PC
P*VZ$bUe5@
package org.rut.util.algorithm.support; ~<_WYSzS
-%^'x&e
import org.rut.util.algorithm.SortUtil; pv-c>8Wb6
DL!%Np?`
/** 2' ^7G@%
* @author treeroot K,%CE ].
* @since 2006-2-2 d2-oy5cEB
* @version 1.0 ('Uj|m}9
*/ hCd? Kti
public class HeapSort implements SortUtil.Sort{ eR6vO5to
<yBa5m@/
/* (non-Javadoc) w1aoEo"S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ylQj2B,CB
*/ SO[ u4b_"h
public void sort(int[] data) { xk7Dx}
MaxHeap h=new MaxHeap(); *kYGXT,f]
h.init(data); n9`]}bnX
for(int i=0;i h.remove(); woBx609Aak
System.arraycopy(h.queue,1,data,0,data.length); ;DR5?N/a
} af9KtX+
9|v%bO
private static class MaxHeap{ }^p<Y5{b
oM Z94,3
void init(int[] data){ |\G^:V[.
this.queue=new int[data.length+1]; 1+XM1(|c`
for(int i=0;i queue[++size]=data; cGdYfi
fixUp(size); (}.MB3`#C
} p3{Ff5FZ
} DZ\K7-
N@}h
private int size=0; SPt/$uYJ
|g!d[ct]
private int[] queue; N2duhI6
V %D1Q}X
public int get() { nb<oo:^
return queue[1]; jC{KI!kPt
} TO"Md["GI
83gWA>Odh
public void remove() { 6o(IL-0]c
SortUtil.swap(queue,1,size--); NRp
fixDown(1); A>2_I)
} NMf#0Nz-
file://fixdown g=@d!]Z~[
private void fixDown(int k) { ^+CHp(X
int j; ~!8j,Bqs+z
while ((j = k << 1) <= size) { QKlsBq
if (j < size %26amp;%26amp; queue[j] j++; f86Z #%
if (queue[k]>queue[j]) file://不用交换 >][D"
break; cBZEyy&
SortUtil.swap(queue,j,k); >$E;."a
k = j; g<.Is V
} ci$J?a
} Ef28
private void fixUp(int k) { *KY:U&*
while (k > 1) { jnTTj l
int j = k >> 1; &r4|WM/ec
if (queue[j]>queue[k]) s*<T'0&w0S
break; )`R}@(r.
SortUtil.swap(queue,j,k); %!(C?k!\
k = j; PM#3N2?|E
} /WE\0bf
} *vuI'EbM
5rdB>8W
} 1PUZB`"3
,p#B5Dif/
} ,I x>.^|
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SortUtil： {tY1$}R
kmc"`Ogotw
package org.rut.util.algorithm; "#E<Leh'
/W BmR R
import org.rut.util.algorithm.support.BubbleSort; QDJ "X
import org.rut.util.algorithm.support.HeapSort; QSY>8P
import org.rut.util.algorithm.support.ImprovedMergeSort; $/IFSB9
import org.rut.util.algorithm.support.ImprovedQuickSort; +,LWyvc'
import org.rut.util.algorithm.support.InsertSort; 4_U"M@
import org.rut.util.algorithm.support.MergeSort; dgoAaS2M
import org.rut.util.algorithm.support.QuickSort; OoH-E.lp
import org.rut.util.algorithm.support.SelectionSort; sVw:d_ E
import org.rut.util.algorithm.support.ShellSort; !3Pmjip
Z/ jmi
/** ?{^_z_,
* @author treeroot -mG`* 0
* @since 2006-2-2 p$'S\W|
* @version 1.0 vJ^~J2#5
*/ 'g,h
public class SortUtil { ^4^N}7>5
public final static int INSERT = 1; BOG.[?yx
public final static int BUBBLE = 2; _avf%OS
public final static int SELECTION = 3; |.0~'
public final static int SHELL = 4; \WE&5 9G
public final static int QUICK = 5; ~U"m"zpLP
public final static int IMPROVED_QUICK = 6; &s vg<UZ
public final static int MERGE = 7; bHv"!
public final static int IMPROVED_MERGE = 8; ?{B5gaU9F
public final static int HEAP = 9; p8%qU>~+4
n-"(~
public static void sort(int[] data) { ka\{?:r,8
sort(data, IMPROVED_QUICK); W3/bM>1
} $KGMAg/H
private static String[] name={ fPUr O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VYkh@j
}; Z,E$4Z
C:5-h(#
private static Sort[] impl=new Sort[]{ Fw\Z[nh
new InsertSort(), =zK4jiM1
new BubbleSort(), 4hwb] Yz
new SelectionSort(), "N6HX*
new ShellSort(), "j,vlG
new QuickSort(), 3rH}/`d4
new ImprovedQuickSort(), @GQfBV|3
new MergeSort(), xS/W}-dPv
new ImprovedMergeSort(), s!/lQo5/
new HeapSort() `M6"=)twu
}; >aO.a[AM
c2M
public static String toString(int algorithm){ {&IB[Y6
return name[algorithm-1]; ;98b SR/
} o&E8<e
TsK!36cg
public static void sort(int[] data, int algorithm) { [-_{3qq<e
impl[algorithm-1].sort(data); =IsmPQKi
} xBTx`+%WS
D`a6D
public static interface Sort { }]o8}$&(
public void sort(int[] data); \j`0f=z_
} -|#{V.G3'
ZPG,o5`%
public static void swap(int[] data, int i, int j) { :.e'?a
int temp = data; ^rVHaI
data = data[j]; U`qC.s(L
data[j] = temp; hFi gY\$m
} znsQ/[
} w8:[w