[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; ,Dmc2D
} ]:]H:U]p
int i1=l; +]xFoH
int i2=mid+1; %hS|68pN6
for(int cur=l;cur<=r;cur++){ e'*HS7g
if(i1==mid+1) Y qdWctUY
data[cur]=temp[i2++]; jjs&`Fy,
else if(i2>r) AIl4]F5I
data[cur]=temp[i1++]; ~!iQ6N?PY
else if(temp[i1] data[cur]=temp[i1++]; B/f0P(7
else }alj[)
data[cur]=temp[i2++]; <~emx'F|
} }3 m0AQ;K
} I`RBj`IF
vE, 37
} \kIMDg3}
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改进后的归并排序: ]DG?R68DQ
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package org.rut.util.algorithm.support; \0;(VLN'U
*O$CaAr\s
import org.rut.util.algorithm.SortUtil; 8;P2A\X
i%Z2wP.o
/** ;^u*hZN[Up
* @author treeroot q z&+=d@
* @since 2006-2-2 S0/usC[r
* @version 1.0 !cW[G/W8
*/ k_|^kdWJ
public class ImprovedMergeSort implements SortUtil.Sort { -cF'2Sfr
~,6b_W p/
private static final int THRESHOLD = 10; 5AeQQU
sd re#@n}
/* \t4tiCw
* (non-Javadoc) Z,7R;,qX
* +t)n;JHN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kYwb -;
*/ 1$lh"fHU
public void sort(int[] data) { 1nhtM
int[] temp=new int[data.length]; 5~ 'Ie<Y_
mergeSort(data,temp,0,data.length-1); *ZSdl0e
} A~(l{g
34|a\b}
private void mergeSort(int[] data, int[] temp, int l, int r) { T$4P_*
int i, j, k; 4-Z()F
int mid = (l + r) / 2; ;$j7H&UNQj
if (l == r) #C*8X+._y
return; !LM<:kf.|
if ((mid - l) >= THRESHOLD) .0HZNWRtb
mergeSort(data, temp, l, mid); ]uL+&(cr
else Y$8JM
insertSort(data, l, mid - l + 1); t%1^Li
if ((r - mid) > THRESHOLD) \$*$='6"
mergeSort(data, temp, mid + 1, r); &O\(;mFc
else XEM'}+d
insertSort(data, mid + 1, r - mid); vH%gdpxX
`\|ssC8u
for (i = l; i <= mid; i++) { ov#7hxe
temp = data; N[|Nxm0z/C
} g+8hp@a
for (j = 1; j <= r - mid; j++) { &xZyM@
temp[r - j + 1] = data[j + mid]; AN:@fZ
} Pi2|
int a = temp[l]; ;!@EixN-YH
int b = temp[r]; =ziwxIo6
for (i = l, j = r, k = l; k <= r; k++) { U!w1AY|
if (a < b) { nQK|n^AU/
data[k] = temp[i++]; hv$yV%.`
a = temp; m#H3:-h,
} else { Ei>m0 ~<\
data[k] = temp[j--]; C_:k8?
b = temp[j]; xvLn'8H.
} N6QVt f.
} I8
} u0`o A
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/** #1-xw~_
* @param data h:\oly\
* @param l 2 -!L _W(
* @param i ]1-z!B4K
*/ =TvzS%U
private void insertSort(int[] data, int start, int len) { ITuq/qts]A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cF T 9Lnz
} {4 >mc'dv
} bEuaOBc
} R! s6% :Yg
} oSb, :^Wl
>n5:1.g
堆排序： xom<P+M!|
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package org.rut.util.algorithm.support; a)-FGP^
w>?Un,K
import org.rut.util.algorithm.SortUtil; _cDF{E+;
_+f+`]iM
/** D]! aT+
* @author treeroot %Tn#-
* @since 2006-2-2 %%%fL;-y
* @version 1.0 uv{P,]lK
*/ Jc4L5*Xn/
public class HeapSort implements SortUtil.Sort{ cX!Pz.C
or ;f&![w
/* (non-Javadoc) JHn*->m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }]P4-KqI
*/ q!'rz
public void sort(int[] data) { Z@D*1\TG=
MaxHeap h=new MaxHeap(); X+8B!F
h.init(data); |tMn={
for(int i=0;i h.remove(); /x@RNdKv
System.arraycopy(h.queue,1,data,0,data.length); c2SC|s]
} ^W83ByP
G1T^a>tj4
private static class MaxHeap{ Q'apG)0I
!v#xb3"/
void init(int[] data){ fg%&N2/(.B
this.queue=new int[data.length+1]; _,h@:Xij
for(int i=0;i queue[++size]=data; .~lKBkS`!
fixUp(size); -#`c5y}P
} y k161\
} -PB[-CX
,0$)yZ3*3,
private int size=0; '$|UwT`s
r~[vaQQ6L
private int[] queue; XdgUqQb}
d=.2@Ry
public int get() { Z~G my7h(
return queue[1]; ^u)z{.z'H/
} >v;8~pgO
CCijf]+
public void remove() { 6V9doP]i
SortUtil.swap(queue,1,size--); "LhUxnll
fixDown(1); <{(/E0~V/<
} pI`?(5iK6|
file://fixdown dHnR_.
private void fixDown(int k) { W><Zn=G4)b
int j; HYr}wG
while ((j = k << 1) <= size) { %u{W7
if (j < size %26amp;%26amp; queue[j] j++; e`tLR- &
if (queue[k]>queue[j]) file://不用交换 2pHR_mrb
break; b}ODWdJ1
SortUtil.swap(queue,j,k); yKagT$-
k = j; %bXx!x8(
} JF9yVE-
} F^aR+m
private void fixUp(int k) { ~iBgw&Y
while (k > 1) { =iB,["s
int j = k >> 1; CLD-mx|?
if (queue[j]>queue[k]) aAvsb$
break; !H][LXB~H
SortUtil.swap(queue,j,k); SD\= m/W
k = j; 2Tav;LKX
} :!&;p
} dth&?/MERL
5@Bu99`
} ]36sZ *
qr\!*\9
} I<b?vR 'F
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SortUtil： MWk:sBCqr
;#GoGb4AM
package org.rut.util.algorithm; NMO-u3<6.
w JwX[\
import org.rut.util.algorithm.support.BubbleSort; $Kj&)&M
import org.rut.util.algorithm.support.HeapSort; %b.UPS@I
import org.rut.util.algorithm.support.ImprovedMergeSort; q}Z3?W
import org.rut.util.algorithm.support.ImprovedQuickSort; 1iT\df
import org.rut.util.algorithm.support.InsertSort; 23(=Xp3;>
import org.rut.util.algorithm.support.MergeSort; 73A)lU.
import org.rut.util.algorithm.support.QuickSort; iJFs0?*
import org.rut.util.algorithm.support.SelectionSort; -u!qrJ*Z
import org.rut.util.algorithm.support.ShellSort; stl 1QO(h
c47")2/yO
/** `;,Pb&W~
* @author treeroot <<9Va.
* @since 2006-2-2 ! ueN|8'
* @version 1.0 I[MgIr^
*/ h 6G/O`:
public class SortUtil { >>[/UFC)n
public final static int INSERT = 1; p5=|Y^g !
public final static int BUBBLE = 2; ?8dVH2W.
public final static int SELECTION = 3; y<R=
public final static int SHELL = 4; j;yf8Nf
public final static int QUICK = 5; &MR/6"/s
public final static int IMPROVED_QUICK = 6; z9 u$~
public final static int MERGE = 7; D;GD<zC]
public final static int IMPROVED_MERGE = 8; xieP "6
public final static int HEAP = 9; (LvS :?T}
$ZPX]2D4B#
public static void sort(int[] data) { ;wiao(t>4N
sort(data, IMPROVED_QUICK); `?*%$>W#"
} I|oT0y&
private static String[] name={ 31^cz*V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <q)4la
}; A|#`k{+1-
L(;WxHL
private static Sort[] impl=new Sort[]{ ,iNv'
new InsertSort(), JN/UUfj
new BubbleSort(), 8GPIZh'0h
new SelectionSort(), c;f!!3&
new ShellSort(), Z!d7&T}
new QuickSort(), =+5,B\~q@C
new ImprovedQuickSort(), ,?UM;^
new MergeSort(), MOn,Db$
new ImprovedMergeSort(), A% Q!^d
new HeapSort() +@9gkPQQ-@
}; 6q<YJ.,
yAT^VRbv
public static String toString(int algorithm){ {s?M*_{|
return name[algorithm-1]; =*BIB5
} PW(\4Q\
0oA{Jix
public static void sort(int[] data, int algorithm) { qM4c]YIaSl
impl[algorithm-1].sort(data); <E;pgw!
} _3iHkQr
9L0GLmLk1u
public static interface Sort { 4rK{-jvh>m
public void sort(int[] data); D(W,yq~7uY
} `Ycf]2.,$
R9We/FhOY
public static void swap(int[] data, int i, int j) { FQ%c~N
int temp = data; @K223?c8l
data = data[j]; Y&H}xn
data[j] = temp; 2N#$X'8
} <%}QDO8\i
} h/eR