[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; {8!ZKlB
} kW<Yda<a
int i1=l; 6Q.{llO
int i2=mid+1; J8GXI:y
for(int cur=l;cur<=r;cur++){ `N|U"s;
if(i1==mid+1) -~vl+L
data[cur]=temp[i2++]; 7d|*postv
else if(i2>r) ]k::J>84
data[cur]=temp[i1++]; ba(arGZ+{
else if(temp[i1] data[cur]=temp[i1++]; zp7V\W; &
else X zi'Lu`
data[cur]=temp[i2++]; &\J?[>EJ.
} wMH[QYb<*
} sorSyuGr
&Q-[;
} yCF"Z/.
QHHW(InG<
改进后的归并排序: w?]ZU-
E;6Y? vJ
package org.rut.util.algorithm.support; lv<iJH\
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import org.rut.util.algorithm.SortUtil; u @{E{
,s1&O`
/** Q!4i_)rM
* @author treeroot N3uMkH-<
* @since 2006-2-2 -Z:]<;qU
* @version 1.0 5kGxhD
*/ "C_T]%'Wm
public class ImprovedMergeSort implements SortUtil.Sort { g\ErJ+i
JP{UgcaF
private static final int THRESHOLD = 10; ?TvQ"Y}k
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/* ZWf-X
* (non-Javadoc) iBG`43;
* j2RRSz&9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >;&Gz-lm
*/ Sg-g^dIN1
public void sort(int[] data) { Ze-MAt
int[] temp=new int[data.length]; Yta1`
mergeSort(data,temp,0,data.length-1); lp,\]]
} M (+.$uz
q>^hoW2$C
private void mergeSort(int[] data, int[] temp, int l, int r) { F0@Qgk]\
int i, j, k; FJO"|||Y'|
int mid = (l + r) / 2; aRbx
if (l == r) Up<~0
return; jr9&.8%W:v
if ((mid - l) >= THRESHOLD) :ar?0
mergeSort(data, temp, l, mid); ~}h^38
else 1s Br.+p
insertSort(data, l, mid - l + 1); KR&s?
if ((r - mid) > THRESHOLD) M(qxq(#{U
mergeSort(data, temp, mid + 1, r); ;4!=DFbU
else *Wzwbwg
insertSort(data, mid + 1, r - mid); C1V# ?03eI
k]Zo-xh4
for (i = l; i <= mid; i++) { >B0D/:R9
temp = data; 6^Ph '
} ue@8voZhS/
for (j = 1; j <= r - mid; j++) { L59bu/LfL
temp[r - j + 1] = data[j + mid]; 1xz\=HOT
} K>kLUcC7Z
int a = temp[l]; IeVLn^?+:
int b = temp[r]; , 7Xqte
for (i = l, j = r, k = l; k <= r; k++) { cFLd)mt/
if (a < b) { O:1DOUYXs
data[k] = temp[i++]; )7W6-.d
a = temp; WE")xhV6
} else { 5^>n5u/
data[k] = temp[j--]; \EZ+#3u
b = temp[j]; gC`)]*'tE
} F+Z2U/'a
} N=#4L$@-
} }'lNi^"XL
9mQ#L<Ps
/** s;J\Kc?"|
* @param data @&5A&(
* @param l 9RxO7K
* @param i @;m$ua*|:
*/ R*yU<9Mm8
private void insertSort(int[] data, int start, int len) { 7IW> >RBF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H>.B99vp
} ]M3#3Ha"
} "V3}t4
} XvskB[\
} rs:Q%V ^
A:eG5K}
堆排序： x5OC;OQc
XrS\+y3
package org.rut.util.algorithm.support; cn%2OP:L^
G AQ 'Ti1!
import org.rut.util.algorithm.SortUtil; #.<V^
1TjZ#yP%1
/** aX^+ O,
* @author treeroot f7J,&<<5w
* @since 2006-2-2 8Mu;U3cIW
* @version 1.0 Kd3QqVJBz1
*/ #dc1pfL!y{
public class HeapSort implements SortUtil.Sort{ tWY2o3j
iCTQ]H3
/* (non-Javadoc) KFDS q"j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i"HgvBHx
*/ ~O: U|&
public void sort(int[] data) { m&IsDAn
MaxHeap h=new MaxHeap(); s-k_d<
h.init(data); f-g1[!"F
for(int i=0;i h.remove(); DA"}A`HfI
System.arraycopy(h.queue,1,data,0,data.length); vG Vd
} `HW:^T
by86zX
private static class MaxHeap{ 8~ #M{}
Z0ReWrl;`
void init(int[] data){ alm- r-Kb3
this.queue=new int[data.length+1]; u1cu]Sj0
for(int i=0;i queue[++size]=data; 0xpx(T[
fixUp(size); !QEL"iJ6M'
} 4_LQ?U>$
} e*]r
4/*H.Fl
private int size=0; d~*TIN8Ke~
0oU=RbC
private int[] queue; dqe7sZl!
Cd]/
public int get() { lKKERO5+
return queue[1]; [VSU"AJY
} v27Ja .tA
$/_qE
public void remove() { ](K0Fwo`;"
SortUtil.swap(queue,1,size--); #Hu~}zy
fixDown(1); 8o-bd_
} :b/jNHJU
file://fixdown 8Fq_i-u
private void fixDown(int k) { K:5eek
int j; h`5)2n+P
while ((j = k << 1) <= size) { }$gmK
if (j < size %26amp;%26amp; queue[j] j++; D59T?B|BdD
if (queue[k]>queue[j]) file://不用交换 fgF;&(b
break; eThy+
SortUtil.swap(queue,j,k); SKXD^OH
k = j; HIf{Z* mb
} ijUzC>O+q
} 4TRG.$2[
private void fixUp(int k) { qv+R:YYOq
while (k > 1) { Q M1F?F
int j = k >> 1; `/Y+1 aD
if (queue[j]>queue[k]) H:S,\D?%2x
break; w1|Hy2D`0
SortUtil.swap(queue,j,k); =_pwA:z"A
k = j; 3Wx,oq;4-
} y,m2(V
} sR_xe}-
uS5o?fg\e
} 3071:W
BWUq%o,@g
} 61K"(r~
kA#vByf`v
SortUtil： svhrf;3:
wu~hqd
package org.rut.util.algorithm; O`W%Tr
F 3RB
import org.rut.util.algorithm.support.BubbleSort; (36K3=Qa
import org.rut.util.algorithm.support.HeapSort; Yx)o:#2
import org.rut.util.algorithm.support.ImprovedMergeSort; n9hm790x-
import org.rut.util.algorithm.support.ImprovedQuickSort; RKkGITDk
import org.rut.util.algorithm.support.InsertSort; ]~c+'E`
import org.rut.util.algorithm.support.MergeSort; BWq/TG=>
import org.rut.util.algorithm.support.QuickSort; %XRN]tsu
import org.rut.util.algorithm.support.SelectionSort; .v`b[4M4
import org.rut.util.algorithm.support.ShellSort; B~gV'(9g
SGcBmjP
/** 46,j9x
* @author treeroot _sMs}?^
* @since 2006-2-2 sH!O0WL
* @version 1.0 N:BL=}V
*/ 6rDfQ`f\p
public class SortUtil { <'m6^]:
public final static int INSERT = 1; @h9MxCE!
public final static int BUBBLE = 2; UuJjO^t
public final static int SELECTION = 3; 45+{nN[
public final static int SHELL = 4; ~1(j&&kXet
public final static int QUICK = 5; }E&NPp>
public final static int IMPROVED_QUICK = 6; p2pAvlNoF
public final static int MERGE = 7; 1;r69e
public final static int IMPROVED_MERGE = 8; ;4~U,+Av
public final static int HEAP = 9; c{3rl;Cs
X>l*v\F9
public static void sort(int[] data) { t@B(+
sort(data, IMPROVED_QUICK); l?E|RKp
} 2VgP
private static String[] name={ \C|cp|A*&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zICI_*~
}; vv5i? F
%FA@)?~
private static Sort[] impl=new Sort[]{ !-tz4vjw
new InsertSort(), fC<m^%*zgA
new BubbleSort(), .b>TK
new SelectionSort(), igkz2SI
new ShellSort(), 2C "=!'
new QuickSort(), Oh!(@
new ImprovedQuickSort(), ~brFo2
new MergeSort(), ClUSrSp
new ImprovedMergeSort(), *"9<TSU%m
new HeapSort() 665[
}; +!O-kd
8tc*.H{^+
public static String toString(int algorithm){ ?y%t}C\W
return name[algorithm-1]; :L$4*8@`+
} $k0H9_
<Oz66bTze
public static void sort(int[] data, int algorithm) { ([k7hUP
impl[algorithm-1].sort(data); Pv){sYUh
} $99R|^
l5O=VqCj
public static interface Sort { ]((i?{jb(
public void sort(int[] data); t_c?Wp~tH
} .9M.|
AU{:;%.g
public static void swap(int[] data, int i, int j) { bLS&H[fK
int temp = data; bhg}-dto
data = data[j]; 8vD3=yK%^
data[j] = temp; ME+em1ZH
} %a8&W
} w~@[r4W