[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; So&an !
} zh5$$*\
int i1=l; zG\g{cB
int i2=mid+1; 2~:jg1
for(int cur=l;cur<=r;cur++){ E5-f{Qc
if(i1==mid+1) 4NY00d/R
data[cur]=temp[i2++]; vx:MLmZ.
else if(i2>r) 'z'q)vcr
data[cur]=temp[i1++]; O}4(v#
else if(temp[i1] data[cur]=temp[i1++]; 7MRu=Z.-b
else z:RclDm
data[cur]=temp[i2++]; +~gqPk
} _R&}CP
} !ke_?+8sY
l>l)m-;O
} aNZJs<3;'D
3kAmRU
改进后的归并排序: ?^F*M#%?
Kk5 vC{
package org.rut.util.algorithm.support; H+^93
4'&j<Ah[#
import org.rut.util.algorithm.SortUtil; ]zGgx07d
^%)H;
/** oSmv (O
* @author treeroot tc go 'V
* @since 2006-2-2 $U,`M"
* @version 1.0 8vzjPWu
*/ eY3l^Su1
public class ImprovedMergeSort implements SortUtil.Sort { 3|$>2IRq
1!u}~E_
private static final int THRESHOLD = 10; ',?9\xEB
Q o}&2m
/* a&>Tk%
* (non-Javadoc) q3+G
* 2k\i/i/Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3j{VpacZY
*/ ]1A"l!yf
public void sort(int[] data) { 'b#`)w@/=
int[] temp=new int[data.length]; 6`sOhVD
mergeSort(data,temp,0,data.length-1); K<@gU\-!
} #St=%!
#+mt}w/
private void mergeSort(int[] data, int[] temp, int l, int r) { w28!Yj1Q
int i, j, k; NGl/F{<
int mid = (l + r) / 2; TW2OT }
if (l == r) MA\^<x_?L}
return; 71AR)6<R
if ((mid - l) >= THRESHOLD) ;DMv?-H
mergeSort(data, temp, l, mid); yN*HIN
else }E=:k&IDPB
insertSort(data, l, mid - l + 1); D`nW9i7
if ((r - mid) > THRESHOLD) Yg 8AMi
mergeSort(data, temp, mid + 1, r); 2ckAJcpEb/
else Of)EBa<5^
insertSort(data, mid + 1, r - mid); v 4@=>L
1<hj3
for (i = l; i <= mid; i++) { s?;rP,{:p
temp = data; b9M.p*!
} Q'f!392|
for (j = 1; j <= r - mid; j++) { 1WGcv O)<
temp[r - j + 1] = data[j + mid]; kcy?;b;z
} &^ECQ
int a = temp[l]; X[L6Av
int b = temp[r]; ISHNeO8
for (i = l, j = r, k = l; k <= r; k++) { |ITSd%`3_
if (a < b) { z^s40707x
data[k] = temp[i++]; }-3| v<d
a = temp; uzf@49m]m
} else { g8 (zvG;Y
data[k] = temp[j--]; |_&Tu#er3
b = temp[j]; e:9CD-
} k+xj 2)d7
} O'5d6m
} `aY{$>$S
ld~8g,
/** Lod$&k@@
* @param data q6Q;9,
* @param l ~z)diF<
* @param i :t &ib}v
*/ R|PFGhi6"A
private void insertSort(int[] data, int start, int len) { p5<2tSD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (2He]M\
} TNs0^h)
} [@Hv,
} auOYi<<>W
} VKtrSY}6T
8'=8!V
堆排序： @Q:5{?
NTRw:'
package org.rut.util.algorithm.support; N2yxli
=Qt08,.bW
import org.rut.util.algorithm.SortUtil; gi::?ET/.
\>0F{-cR$
/** pg3B^
* @author treeroot 6d~[My
* @since 2006-2-2 /1X0h
* @version 1.0 &FrW(>2
*/ ;IhkGPpWP
public class HeapSort implements SortUtil.Sort{ Fs q=u-= :
te?R(&
/* (non-Javadoc) @kR/=EfS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V1R=`
*/ .e2qa
public void sort(int[] data) { ien >Ou
MaxHeap h=new MaxHeap(); @:$zReS2
h.init(data); |CME:;{T
for(int i=0;i h.remove(); lf3:Z5*&>
System.arraycopy(h.queue,1,data,0,data.length); iqecm]Z0
} (5@9j
8+Lig
private static class MaxHeap{ 5TlPs_o
'>:mEXK}w
void init(int[] data){ sa\v9
this.queue=new int[data.length+1]; xwxMVp`|o
for(int i=0;i queue[++size]=data; ybBLBJb
fixUp(size); XcJ'w
} O@U[S.IK
} ?9qA"5
~__]E53F
private int size=0; y6KI.LWR9
tN|sHgs
private int[] queue; Y$3H$F.+
mq$mB1$3u
public int get() { CFJ F}aW
return queue[1]; zn5
} x1)G!i
O`e0r%SJ
public void remove() { DJ"O`qNV3
SortUtil.swap(queue,1,size--); t?^C9(;6
fixDown(1); sMAc+9G9k
} htbN7B(
file://fixdown WXj}gL`
private void fixDown(int k) { DKL< "#.7
int j; L|G!of[8n
while ((j = k << 1) <= size) { kzCD>m
if (j < size %26amp;%26amp; queue[j] j++; |Ia3bVW
if (queue[k]>queue[j]) file://不用交换 _%Ay\4H^\
break; R4,j
SortUtil.swap(queue,j,k); h'wOslyFa
k = j; YIA}F1:
} wC@5[e$
} bu"R2~sb
private void fixUp(int k) { TRG(W^<F
while (k > 1) { tBe)#-O
int j = k >> 1; M-KjRl
if (queue[j]>queue[k]) 8;7Y}c
break; v#0R
SortUtil.swap(queue,j,k); q#B^yk|Y
k = j; >'eOzMBn
} b?h9G3J_a
} WSfla~-'F
^=Rqa \;
} .)^@[yrkz
0A[p3xE\
} &)L2a)
s)%RmsdL
SortUtil： 07-S%L7Z
Uh}n'Xd#{}
package org.rut.util.algorithm; eW)(u$C|qL
KU[eY}
import org.rut.util.algorithm.support.BubbleSort; 6~\z]LZ
import org.rut.util.algorithm.support.HeapSort; uf,4GPo,
import org.rut.util.algorithm.support.ImprovedMergeSort; N$J)Ow
import org.rut.util.algorithm.support.ImprovedQuickSort; T{u!4Yu
import org.rut.util.algorithm.support.InsertSort; dwks"5l
import org.rut.util.algorithm.support.MergeSort; LH..8nfl
import org.rut.util.algorithm.support.QuickSort; =tl[?6
import org.rut.util.algorithm.support.SelectionSort; s}A)sBsaP3
import org.rut.util.algorithm.support.ShellSort; W#|]m=2W
?}sh@;]*h
/** yG58?5\9
* @author treeroot #5O'XH5_
* @since 2006-2-2 V%&t'H{
* @version 1.0 -CW&!oW
*/ ^z3-$98=A
public class SortUtil { Ltpd:c
public final static int INSERT = 1; C,C%1
public final static int BUBBLE = 2; qOz,iR?}
public final static int SELECTION = 3; F?'=iY<h
public final static int SHELL = 4; 1QM*oj:
public final static int QUICK = 5; J=>?D@K
public final static int IMPROVED_QUICK = 6; qWe1`.o
public final static int MERGE = 7; CtVY;eG
public final static int IMPROVED_MERGE = 8; 0B)l"$W[)/
public final static int HEAP = 9; #"d.D7nA
d -6[\S#
public static void sort(int[] data) { w3:WvA5jt
sort(data, IMPROVED_QUICK); DHGv< F@
} { 'Hi_b3
private static String[] name={ Fa^5.p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |E!()j=
}; IXt2R~b
9"2.2li5$
private static Sort[] impl=new Sort[]{ ~u1ox_v`%(
new InsertSort(), V ?3>hQtB
new BubbleSort(), a_I!2w<I
new SelectionSort(), a8aEZ724
new ShellSort(), qVC_K/w 7
new QuickSort(), boo,KhW'Y
new ImprovedQuickSort(), TCp!4-~,
new MergeSort(), a&)0_i:r
new ImprovedMergeSort(), "s2?cQv{#
new HeapSort() c"t1E-Nsk
}; 4vTO #F
k|-`d
public static String toString(int algorithm){ c\UVMyE
return name[algorithm-1]; }gyJaMA
} VB*N;bM^
]CH@T9d5V
public static void sort(int[] data, int algorithm) { v vlfL*f
impl[algorithm-1].sort(data); {6)fZpd)@
} ?ECmPS1
T^NY|Y/
public static interface Sort { H~1laV
public void sort(int[] data); >b,o yM
} dN;kYWRK
NUb^!E"
public static void swap(int[] data, int i, int j) { tx&>Eo
int temp = data; B{a:cz>0<
data = data[j]; {f#{NA5
data[j] = temp; ,Ihuo5>/z
} [6BLC{2
} /7*jH2