[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; UALg!M#
} &m%Pr
int i1=l; L!8 -:)0b
int i2=mid+1; 8zCGMhd
for(int cur=l;cur<=r;cur++){ yNLa3mW
if(i1==mid+1) X>6~{3
data[cur]=temp[i2++]; U<gUX07
else if(i2>r) z~}StCH(
data[cur]=temp[i1++]; 7+D'W7Yx
else if(temp[i1] data[cur]=temp[i1++]; j^aQ>(t(9
else D)O6|DiO
data[cur]=temp[i2++]; 0'V-
} pE(<XD3Q
} L6rs9su=7
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} *&hXJJ[+
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改进后的归并排序: `G ;Lz^
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package org.rut.util.algorithm.support; \[IdR^<YM
+%Bf y4F6
import org.rut.util.algorithm.SortUtil; WB=<W#?w7%
?G>5 D`V
/** nIT^'
* @author treeroot Kc9mI>uH
* @since 2006-2-2 4ye`;hXy
* @version 1.0 ?(,5eg
*/ e&H<lT
public class ImprovedMergeSort implements SortUtil.Sort { (1elF)
XftJ= *
private static final int THRESHOLD = 10; i"sYf9,
N}l]Ilm$34
/* "f&i 251
* (non-Javadoc) ?) ,xZ1"
* n6%jhv9H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /ie3H,2
*/ LKqog%,c
public void sort(int[] data) { 'a-5UTT
int[] temp=new int[data.length]; :i,c<k
mergeSort(data,temp,0,data.length-1); ,8J*S
} LKf5r,C
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private void mergeSort(int[] data, int[] temp, int l, int r) { vY0V{u?J
int i, j, k; LG&Q>pt.
int mid = (l + r) / 2; ~\)&{'
if (l == r) d'AviW>
return; E9Xk8w'+
if ((mid - l) >= THRESHOLD) /_k hFw
mergeSort(data, temp, l, mid); qh(-shZ4Du
else UwL"%0u
insertSort(data, l, mid - l + 1); jzJ1+/9
if ((r - mid) > THRESHOLD) L yA(.
mergeSort(data, temp, mid + 1, r); e\ l,gQP
else S)'q:`tZo
insertSort(data, mid + 1, r - mid); O 44IH`SI
e}Af"LI
for (i = l; i <= mid; i++) { vZ nO
temp = data; H8t{ >C)]
} wh7a|
for (j = 1; j <= r - mid; j++) { Y3MR:{}
temp[r - j + 1] = data[j + mid]; k,NU,^ &
} &W!d}, ;
int a = temp[l]; a5U2[Ko80
int b = temp[r]; bF Y)o Z
for (i = l, j = r, k = l; k <= r; k++) { kkE)zF
if (a < b) { $NGtxZp
data[k] = temp[i++]; <0Egkz3s
a = temp; aji~brq
} else { :7DVc&0
data[k] = temp[j--]; SVs~,
b = temp[j]; xwH|ryfs,Z
} 6dS1\Y
} ZnhuIAAG
} KEVy%AP=*h
rd 35)
/** F{H0 %
* @param data f\F_?s)_y
* @param l ?9r,Y;,H
* @param i G}dOx}kT
*/ Lq $4.l[j
private void insertSort(int[] data, int start, int len) { 2W:?#h3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }b]y 0"
} kJ<Xq
} f/[?5M[
} ;AL@<,8
} tCCi|*P G
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堆排序： -TU{r_!Z(
%]sEt{
package org.rut.util.algorithm.support; .Qi1I
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import org.rut.util.algorithm.SortUtil; xc]C#q
$:gSc&mx
/** C(|T/rQ-
* @author treeroot K9N0kBJ0<
* @since 2006-2-2 >->xhlL*
* @version 1.0 >*i8RqU
*/ #2vG_B<M)
public class HeapSort implements SortUtil.Sort{ !lN a`
?nGf Wx^
/* (non-Javadoc) 7F9g:r/^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h,6S$,UI
*/ :-WCW);N
public void sort(int[] data) { Jgv>$u
MaxHeap h=new MaxHeap(); -2na::<K
h.init(data); bZ22O"F
for(int i=0;i h.remove(); QGz3id6
System.arraycopy(h.queue,1,data,0,data.length); pQMpkAX
} xEZVsz
NF)\">Ye
private static class MaxHeap{ ND9>`I5
A&lgiR*ObT
void init(int[] data){ 1>@|
this.queue=new int[data.length+1]; JHh9> .1
for(int i=0;i queue[++size]=data; 4C9"Q,o%&
fixUp(size); ![hhPYmV
} }}bi#G:R+
} (xSi6EZ6;
;s B:s9M
private int size=0; $No>-^)
E?h2e~ ,]
private int[] queue; DHNii_w4v
oS|~\,p"
public int get() { @C [|'[xQ
return queue[1]; \C2P{q/m
} 70*iJ^|
vyOC2c8
public void remove() { `iayh
SortUtil.swap(queue,1,size--); Odjd`DD1
fixDown(1); QOy&!6
} ggsi`Z{j?
file://fixdown :w_1J'D}
private void fixDown(int k) { X*yp=qI
int j; }'0Xz9/ l
while ((j = k << 1) <= size) { C2|2XL'l(C
if (j < size %26amp;%26amp; queue[j] j++; /F}\V ^
if (queue[k]>queue[j]) file://不用交换 u0KZrz
break; L[r0UXYLV
SortUtil.swap(queue,j,k); U5$DJ5>8
k = j; GJ_)Cl+5E
} ~@?-|xLqQ
} $ 14DTjj
private void fixUp(int k) { Y"rV[oe
while (k > 1) { WB[G!'
int j = k >> 1; J6Nw-qF
if (queue[j]>queue[k]) q>4i0p8^
break; e+ w
SortUtil.swap(queue,j,k); dq/?&X
k = j; 5@A=, GPUn
} Q~!hr0 ZR
} Y4!q 1]TGX
'nt,+`.y6
} <n#V
v4~Xv5|w^F
} _W@Fk)E6N
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SortUtil： vK7,O%!S
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package org.rut.util.algorithm; m$qC 8z]
?JTyNg4<
import org.rut.util.algorithm.support.BubbleSort; RAQ;O
import org.rut.util.algorithm.support.HeapSort; '#::ba[9w
import org.rut.util.algorithm.support.ImprovedMergeSort; J}KktD@!O
import org.rut.util.algorithm.support.ImprovedQuickSort; ,[1`'nN@g
import org.rut.util.algorithm.support.InsertSort; koY8=lh/
import org.rut.util.algorithm.support.MergeSort; NRF%Qd8I/2
import org.rut.util.algorithm.support.QuickSort; cP=mJ1
import org.rut.util.algorithm.support.SelectionSort; >:E-^t%
import org.rut.util.algorithm.support.ShellSort; H{zuIN/.1
% peb{i
/** BQ0PV
* @author treeroot Cbvl( (
* @since 2006-2-2 tg3JU\
* @version 1.0 A@AGu#W
*/ :FpBz~!a
public class SortUtil { 6YGr"Kj &
public final static int INSERT = 1; /O9EI'40)
public final static int BUBBLE = 2; .: ;Hh~
public final static int SELECTION = 3; \9zC?Cw
public final static int SHELL = 4; NX_S
public final static int QUICK = 5; tSa%ZkS
public final static int IMPROVED_QUICK = 6; =8_TOvSJ4p
public final static int MERGE = 7; yS3s5C{C
public final static int IMPROVED_MERGE = 8; F|{?GV%hF
public final static int HEAP = 9; XQ;dew+
G_4P)G3H
public static void sort(int[] data) { .cog9H'
sort(data, IMPROVED_QUICK); o}Np}PE6
} ^BTNx2VHf
private static String[] name={ vUeel%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y36aoKH
}; C YKGf1;If
+@7R,8
private static Sort[] impl=new Sort[]{ &2pM3re/f
new InsertSort(), P~Owvs/=
new BubbleSort(), s>I}-=.(Q
new SelectionSort(), yo6IY
new ShellSort(), XX6)(
new QuickSort(), -~ Q3T9+
new ImprovedQuickSort(), $,42h
new MergeSort(), 1bs95Fh9Q
new ImprovedMergeSort(), J<@]7)|U
new HeapSort() '8 #*U
}; N3RwcM9+;
- [j0B|cwG
public static String toString(int algorithm){ {v(|_j&:o
return name[algorithm-1]; a9Rh
} 7IH{5o\e
>UH=]$0N
public static void sort(int[] data, int algorithm) { 1sA-BQL
impl[algorithm-1].sort(data); wX;NU4)n
} P'k39
Wfy+7$14M
public static interface Sort { &pl;U\dc*a
public void sort(int[] data); UU`qI}Ys8F
} ]F!h~>
A???s,F_
public static void swap(int[] data, int i, int j) { 0AenDm@9
int temp = data; XWV~6"
data = data[j]; &LYZQ?|
data[j] = temp; g'E^@1{
} 4HAfTQ 1G
} "H@AT$Ny(