[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; 7@.cOB`y@3
} 1[*UYcD
int i1=l; *'"T$ib
int i2=mid+1; Nf3.\eR
for(int cur=l;cur<=r;cur++){ Bb&^{7
if(i1==mid+1) #QvMVy
data[cur]=temp[i2++]; (vR 9H(#
else if(i2>r) a</D_66
data[cur]=temp[i1++]; ?Y:x[pOe
else if(temp[i1] data[cur]=temp[i1++]; *F>v]8
else o!Ev;'D
data[cur]=temp[i2++]; 1tCQpf
} RUCPV[{b
} + SZYg[
5_0(D;Q
} q;5i4|
B:"THN^
改进后的归并排序: EzW)'Zzw~
dk QaM@
package org.rut.util.algorithm.support; !KKT[28v
k^$+n_
import org.rut.util.algorithm.SortUtil; J68j=`Y
q0%
/** wn Y$fT9
* @author treeroot at!Y3VywG
* @since 2006-2-2 l?Y_~Wuw
* @version 1.0 ^^i6|l1
*/ d;Hn#2C
public class ImprovedMergeSort implements SortUtil.Sort { r _,_5 @0e
MyJ4><oG
private static final int THRESHOLD = 10; $d+DDm1o
nfb]VN~(
/* It_M@
* (non-Javadoc) L?_7bXoD
* : FAH\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bhqft;Nuh
*/ /wQL
public void sort(int[] data) { ]DFXPV
int[] temp=new int[data.length]; rI5Foh6
mergeSort(data,temp,0,data.length-1); vgn@d,v
} UX`]k{Mz
-3Avs9`5
private void mergeSort(int[] data, int[] temp, int l, int r) { W$dn_9W
int i, j, k; nmlPX7!{$
int mid = (l + r) / 2; E{=2\Wkcp
if (l == r) _2fkb=2@
return; _ 7oV<
if ((mid - l) >= THRESHOLD) k<w(i k1bi
mergeSort(data, temp, l, mid); 89{HJ9}
else =U OLT>!
insertSort(data, l, mid - l + 1); <VjJAu
if ((r - mid) > THRESHOLD) 3>zN/f
mergeSort(data, temp, mid + 1, r); /)N@M
else ?!w^`D0}o
insertSort(data, mid + 1, r - mid); 6nDV1O5
L+B?~_*
for (i = l; i <= mid; i++) { OYM@szM
temp = data; =9L$L|W
} d lH$yub
for (j = 1; j <= r - mid; j++) { iK;dU2h
temp[r - j + 1] = data[j + mid]; +&tgJ07A
} Q8p&Ki;i
int a = temp[l]; U]qav,^[
int b = temp[r]; 78n=nHS
for (i = l, j = r, k = l; k <= r; k++) { 2^~<("+w
if (a < b) { (-7ZI"Ku
data[k] = temp[i++]; R7oj#
a = temp; %v5R#14[n
} else { 1rw0sAuGy
data[k] = temp[j--]; W]<$0
b = temp[j]; K.tlo^#^B[
} "Z,q?Fc
} kI*(V[i
} *VSel4;\t
3zuF{Q2P<
/** 5yh/0i5|
* @param data iMF<5fLH&
* @param l 'f8(#n=6qP
* @param i >YW\~T
*/ Auy".br'
private void insertSort(int[] data, int start, int len) { '2J0>Bla
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /4=-b_2Y~
} C`oa3B,z
} ;y?);!g
} ;N+$2w
} dYFzye
@$Qof1j'%
堆排序： mOll5O7VW
fbrp#G71y
package org.rut.util.algorithm.support; ,zcQS-e2
lw8"'0
import org.rut.util.algorithm.SortUtil; (J$\-a7<f
b yg0.+e0
/** kg5ev8
* @author treeroot Eu@5L9A
* @since 2006-2-2 \`'KlF2
* @version 1.0 Qx|H1_6
*/ `znB7VQ0
public class HeapSort implements SortUtil.Sort{ q)u2Y]
[y)FcIK}
/* (non-Javadoc) lYf+V8{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $<@\-vYvr@
*/ ]7sx;KFv
public void sort(int[] data) { 6,Hqb<(
MaxHeap h=new MaxHeap(); 1.@vS&Y7OE
h.init(data); \v@({nB8
for(int i=0;i h.remove(); n_[i0x7#
System.arraycopy(h.queue,1,data,0,data.length); .W\ve>;
} ,cTgR78'
"yb WDWu
private static class MaxHeap{ z,;;=V6j
>hMUr*j
void init(int[] data){ =Je>`{J
this.queue=new int[data.length+1]; ~yJ4qp-
for(int i=0;i queue[++size]=data; %:6?Y%`*[
fixUp(size); AWr}"r?s
} T~4mQuYi
} yT /EHmJ
L6:h.1 U$
private int size=0; qX:B4,|ck
,1n >U?5
private int[] queue; vvu<:16
2f,B$-#
public int get() { -xmf'c9P
return queue[1]; 4k}e28
} MlO-+}`_+
4|J[Jdj
public void remove() { ;~ 4k7Uz
SortUtil.swap(queue,1,size--); jjOgG-Q
fixDown(1); Pd=,$UQp
} aA*9,
file://fixdown dFW=9ru+MQ
private void fixDown(int k) { |qcD;
int j; a^nAZ
while ((j = k << 1) <= size) { uq7T{7~<
if (j < size %26amp;%26amp; queue[j] j++; Os),;W0w4
if (queue[k]>queue[j]) file://不用交换 V}8$p8#<@
break; #m. AN
SortUtil.swap(queue,j,k); eBB:~,C^q.
k = j; :1fagaPg
} I8m:3fL"
} ^%bBW6eZ
private void fixUp(int k) { PB'0?b}fab
while (k > 1) { J07O:cjyu
int j = k >> 1; mLL$|
if (queue[j]>queue[k]) %5</d5.
break; R|,7d:k
SortUtil.swap(queue,j,k); x2wg^$F*oO
k = j; w*LbH]l<-
} Evu=M-?
} <zB*'m
7Ur?ep
} iv%w!3#
`"y`AY/N
} 9w~cvlv[
I=dGq;Jaz
SortUtil： D!> d0k,Y
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package org.rut.util.algorithm; LVtu*k
9Ld9N;rWm#
import org.rut.util.algorithm.support.BubbleSort; <bmLy_":
import org.rut.util.algorithm.support.HeapSort; hq_~^/v\
import org.rut.util.algorithm.support.ImprovedMergeSort; y%(X+E"n*
import org.rut.util.algorithm.support.ImprovedQuickSort; Ub)I66
import org.rut.util.algorithm.support.InsertSort; 66:ALFwd7
import org.rut.util.algorithm.support.MergeSort; T-L5zu
import org.rut.util.algorithm.support.QuickSort; d+2daKi
import org.rut.util.algorithm.support.SelectionSort; m@qqVRn#)
import org.rut.util.algorithm.support.ShellSort; f@z*3I;
-zfoRU v
/** is#8R:7.:
* @author treeroot D5A=,\uk
* @since 2006-2-2 0Qd%iP)6
* @version 1.0 ym%slg
*/ Df=q-iq<{/
public class SortUtil { TQ9'76INb
public final static int INSERT = 1; Ek .3
public final static int BUBBLE = 2; rg&+
public final static int SELECTION = 3; Vu]h4S:
public final static int SHELL = 4; SE`l(-tL
public final static int QUICK = 5; (O5)wej
public final static int IMPROVED_QUICK = 6; `.BR=['O
public final static int MERGE = 7; ia{kab|_5
public final static int IMPROVED_MERGE = 8; T!^Mvat
public final static int HEAP = 9; }=GM?,7b
&TT":FPR
public static void sort(int[] data) { V/y=6wUiSl
sort(data, IMPROVED_QUICK); 9{eBgdC
} [8]m8=n
private static String[] name={ X , ZeD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "EPD2,%S
}; HhSjR%6HY;
}p'8w\C$
private static Sort[] impl=new Sort[]{ =7jEz+w#
new InsertSort(), m6n hC
new BubbleSort(), X%4h(7;v
new SelectionSort(), !Yh}H<w0
new ShellSort(), pCt}66k}
new QuickSort(), #)74X%4(
new ImprovedQuickSort(), !IAKVQ
new MergeSort(), 9YC&&0 C@
new ImprovedMergeSort(), rihlae5Kz
new HeapSort() tV`&-H
}; Pz473d
LM1b I4
public static String toString(int algorithm){ 'j79GC0
return name[algorithm-1]; %W;u}`
} c^S&F9/U*
Es;;t83p
public static void sort(int[] data, int algorithm) { \3^Pjx
impl[algorithm-1].sort(data); I'IB_YRL4
} !<Z{@7oH
<-)9>c:k
public static interface Sort { :kp0EiJ
public void sort(int[] data); f5?hnt`m
} ?)cJZ>$!w
,L%p
public static void swap(int[] data, int i, int j) { R<g=\XO'y
int temp = data; JuJ5qIal
data = data[j]; N$Hqa^!'T
data[j] = temp; &&C~@WY,r
} wItzcY1m
} c!D> {N