[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; rAXX}"l6s
} DJP6TFT&G
int i1=l; {$fsS&aPg
int i2=mid+1; g-@h>$< 1
for(int cur=l;cur<=r;cur++){ Nl*i5 io
if(i1==mid+1) r(`nt-o@
data[cur]=temp[i2++]; 7&6Y
else if(i2>r) _/ Os^>R
data[cur]=temp[i1++]; >.LKct*5K
else if(temp[i1] data[cur]=temp[i1++]; l`gTU?<xd
else ]}LGbv"`A
data[cur]=temp[i2++]; xjq0D[
} 2P5_zND
} _e'Y3:
^l!L)iw
} CV^c",b_
`="v>qN2\
改进后的归并排序: 7GZq|M_:y
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package org.rut.util.algorithm.support; +t]Xj1Q
yP\Up
import org.rut.util.algorithm.SortUtil; ("Dv>&w9
ZBc|438[
/** 8D~x\!(p\
* @author treeroot rt b*n~
* @since 2006-2-2 _;e\:7<m
* @version 1.0 D,rZ0?R
*/ Z+idLbIs
public class ImprovedMergeSort implements SortUtil.Sort { +?d}7zh
HDS"F.l5
private static final int THRESHOLD = 10; \*"`L3
T-8J
/* 2QayM?k8
* (non-Javadoc) (0jr;jv
* #":a6%0Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JJf<*j^G
*/ L11L23:
public void sort(int[] data) { UK3a{O[5
int[] temp=new int[data.length]; `WlE| G[
mergeSort(data,temp,0,data.length-1); -M61Mw1
} G)7)]yBL
@ajM^L!O
private void mergeSort(int[] data, int[] temp, int l, int r) { H(qm>h$bU
int i, j, k; :vQM>9l7
int mid = (l + r) / 2; /iC_!nu
if (l == r) WE.Tuo5L
return; 5$Kf]ZP
if ((mid - l) >= THRESHOLD) T*P+Fh"
mergeSort(data, temp, l, mid); wO!u!I
else ,w`~K:b.
insertSort(data, l, mid - l + 1); yJD>ny
if ((r - mid) > THRESHOLD) y1,5$0@G
mergeSort(data, temp, mid + 1, r); U e*$&VlT
else {ZqQ!!b
insertSort(data, mid + 1, r - mid); K$-;;pUl
+hH}h?K
for (i = l; i <= mid; i++) { Lq04T0
temp = data; #T%zfcUj
} _413\`%8?
for (j = 1; j <= r - mid; j++) { xzk}[3P{
temp[r - j + 1] = data[j + mid]; z="L4
} $D_HZ"ytu
int a = temp[l]; JR1*|u
int b = temp[r]; H/jm f5
for (i = l, j = r, k = l; k <= r; k++) { l{%a&/
if (a < b) { Y';>O`
data[k] = temp[i++]; !_^g8^>2(
a = temp; Y4To@TrN#\
} else { IZ~.{UQ
data[k] = temp[j--]; <lo`q<q
b = temp[j]; GqUSVQ
} yJ/#"z=h?
} #s+Q{2s
} %#k,6;m
|Fv?6qw+
/** 2k+16/T
* @param data -e*BqH2t
* @param l v2J0u:#,
* @param i Q!$IQJ]|Y
*/ D'L{wm
private void insertSort(int[] data, int start, int len) { #&siHHs \
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zilaP)5x6
} 4}-#mBV]/
} wj%wp[KA$
} j=j+Nf$
} 9#@Zz4Ww
IVteF*8hU
堆排序： ,F:=(21
(~#G'Hd
package org.rut.util.algorithm.support; }1m_o@{3P
"{( [!
import org.rut.util.algorithm.SortUtil; ( V4G<-jG
}1>atgq]w
/** 9^zx8MRXd
* @author treeroot sXB+s
* @since 2006-2-2 V2Y$yV8g1
* @version 1.0 mo9$NGM&}
*/ ;0j*>fb\q7
public class HeapSort implements SortUtil.Sort{ k/#>S*Ne
u(hC^T1
/* (non-Javadoc) 263*: Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }m_t$aaUc1
*/ @^CG[:|
public void sort(int[] data) { {!=2<-Aq
MaxHeap h=new MaxHeap(); ;3UvkN
h.init(data); ZQ[~*)
for(int i=0;i h.remove(); Wc;+2Hl[@
System.arraycopy(h.queue,1,data,0,data.length); Cef7+fa
} $l"MXxx5I
vlQ0gsXK
private static class MaxHeap{ ^<;w+%[MT
Wk[)+\WQ?
void init(int[] data){ @L;C_GEa
this.queue=new int[data.length+1]; XS|mKuMcC
for(int i=0;i queue[++size]=data; v3^t/[e~:
fixUp(size); f)^t')
} "Ot{^_e
} MPvWCPB
qGa<@ b
private int size=0; KjYDFrR4
,?y7,nb
private int[] queue; HRHrSf7
D rTM$)
public int get() { c[{UI
return queue[1]; a: IwA9!L
} ,n5a])Dg
.,mM%w,^O
public void remove() { ^zeL+(@r/
SortUtil.swap(queue,1,size--); 4Hd Si
fixDown(1); IMaYEO[
} $8@+j[>
file://fixdown W5I=X]&
private void fixDown(int k) { \`gEu{
int j; iGa}3pF
while ((j = k << 1) <= size) { s3< F
if (j < size %26amp;%26amp; queue[j] j++; .. UoyBV
if (queue[k]>queue[j]) file://不用交换 <[9?Rj@
break; (nz}J)T&
SortUtil.swap(queue,j,k); :c<*%*e
k = j; (}0S1)7t
} cY~M4:vgT
} 4\1;A`2%0
private void fixUp(int k) { YFqZe6g0$
while (k > 1) { :gaETr
int j = k >> 1; o^PuhVu
if (queue[j]>queue[k]) bK7.St
break; ue9h
SortUtil.swap(queue,j,k); %~\
k = j; gvo?([j-m
} _n_sfT6)B
} |."G?*
h0XH`v
} Y^3)!>
$_bZA;EMQ
} $rTu6(i1
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SortUtil： h--45`cE
ucM.Ro=@
package org.rut.util.algorithm; ~oFh>9u
eP?~-#
import org.rut.util.algorithm.support.BubbleSort; `sxN!Jj?
import org.rut.util.algorithm.support.HeapSort; Nm"<!a<F
import org.rut.util.algorithm.support.ImprovedMergeSort; C9pnU,[
import org.rut.util.algorithm.support.ImprovedQuickSort; d<v~=
import org.rut.util.algorithm.support.InsertSort; sMX$Q45e
import org.rut.util.algorithm.support.MergeSort; en%B>]QI
import org.rut.util.algorithm.support.QuickSort; J7m`]!*t
import org.rut.util.algorithm.support.SelectionSort; ?\M)WDO
import org.rut.util.algorithm.support.ShellSort; 1t#XQ?8
.FJj
/** 6=3(oUl
* @author treeroot a7=YG6[
* @since 2006-2-2 Ge1duRGa
* @version 1.0 GoL|iNW`
*/ ~4+8p9f
public class SortUtil { NQ{-&#@/v
public final static int INSERT = 1; ^(g_.>
public final static int BUBBLE = 2; CPGL!:
public final static int SELECTION = 3; Z+,CL/
public final static int SHELL = 4; gi 5XP]z
public final static int QUICK = 5; Iy.mVtcsZ
public final static int IMPROVED_QUICK = 6; ^Rk^XQCh
public final static int MERGE = 7; ()B7(Y
public final static int IMPROVED_MERGE = 8; 9R>~~~{-Go
public final static int HEAP = 9; r},lu=em
!"%S#nrL$
public static void sort(int[] data) { vlAy!:CV
sort(data, IMPROVED_QUICK); UeNF^6sWu0
} L5&K}F]r^
private static String[] name={ TR?Bvy2s:g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [x|)}P7%s
}; ~.H~XKw
*F..ZS'$[
private static Sort[] impl=new Sort[]{ 7P c(<Ui+
new InsertSort(), {yU0D*#6
new BubbleSort(), W W35&mI)k
new SelectionSort(), F#KF6)P
new ShellSort(), K?JV]^
new QuickSort(), +9jivOmK
new ImprovedQuickSort(), ;da4\bppt
new MergeSort(), S!<"Swf:
new ImprovedMergeSort(), wO89&XZ<
new HeapSort() )tCx5 9
}; ,A?{~?u.
$i -zMa
public static String toString(int algorithm){ df yrn%^Ia
return name[algorithm-1]; #XfT1
} Yq{jEatY{/
CMFC"eSe
public static void sort(int[] data, int algorithm) { <irpmRQr
impl[algorithm-1].sort(data); _trpXkQp
} "H@Fe
Eny!R@u7q
public static interface Sort { z:?:
public void sort(int[] data); k3#wLJ
} ZLuPz#
+2El
public static void swap(int[] data, int i, int j) { yE<,Z%J[n
int temp = data; oLd:3,p}
data = data[j]; !9PX\Xbn
data[j] = temp; *iYMX[$
} ~Z7)x7 z
} 1S&0