[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; 5b4V/d* '
} . .je<
int i1=l; H{Y=&#%d
int i2=mid+1; 78inh%
for(int cur=l;cur<=r;cur++){ x7kg_`\U
if(i1==mid+1) Jq<`j<'9
data[cur]=temp[i2++]; u.4vp]eU
else if(i2>r) `1}?{ud
data[cur]=temp[i1++]; `iayh
else if(temp[i1] data[cur]=temp[i1++]; wOkJ:k
else lLFBop
data[cur]=temp[i2++]; {UC<I.5X
} RTA=|q
} z,x"vK(
OQ&D?2r
} Y~SlipY_
YM*6W?
改进后的归并排序: +C;#Qf
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package org.rut.util.algorithm.support; R$&&kmJ
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import org.rut.util.algorithm.SortUtil; MkGq%AE`Y
V42*4hskL
/** 4m(>"dHP
* @author treeroot ]S aH/$
* @since 2006-2-2 pV|?dQ
* @version 1.0 $M<4Bqr
*/ WHLKf
public class ImprovedMergeSort implements SortUtil.Sort { gN'i+mQcu
v.v%k2;
private static final int THRESHOLD = 10; E0A|+P '?
SFgIY]
/* bYB}A:
* (non-Javadoc) =&/a\z!
* p[cL#fBz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >!F,y3"5S
*/ r<N*N,~
public void sort(int[] data) { ^?xJpr%)
int[] temp=new int[data.length]; Z=[a 8CU
mergeSort(data,temp,0,data.length-1); )j|y.[
} J9c3d~YW
LP6FSo~K
private void mergeSort(int[] data, int[] temp, int l, int r) { #TwE??ms
int i, j, k; ]3u'Qv}o
int mid = (l + r) / 2; !!O{ ppM
if (l == r) %FFm[[nxI
return; =\7p0cq&*
if ((mid - l) >= THRESHOLD) }JMkM9]
mergeSort(data, temp, l, mid); pyJOEL]1F
else JwVC?m).
insertSort(data, l, mid - l + 1); =usDI<3r
if ((r - mid) > THRESHOLD) _`[6jhNa!
mergeSort(data, temp, mid + 1, r); u0hbM9U>
else z n8ig/C
insertSort(data, mid + 1, r - mid); NG!Q< !Y
Xq!tXJ)
for (i = l; i <= mid; i++) { Cwf$`?|W
temp = data; Rj;e82%%N
} "UnSZ[;t
for (j = 1; j <= r - mid; j++) { Y8{1?LO
temp[r - j + 1] = data[j + mid]; TaJn2cC^
} 5(`GF|
int a = temp[l]; -gGK(PIf
int b = temp[r]; !TZ/PqcE
for (i = l, j = r, k = l; k <= r; k++) { )stWr r&
if (a < b) { 2]*~1d
data[k] = temp[i++]; 'c{]#E1}
a = temp; &U)s%D8e;d
} else { BQ0PV
data[k] = temp[j--]; BXw,Rz }
b = temp[j]; )qXe`3d5
} 9<CUsq@i:
} Z=8CbS).
} x%ag.g2I
gc)3
/** tvxcd*{
* @param data ; 2-kQK9
* @param l Q&Ahr
* @param i qk1D#1vl
*/ 6mpUk.M"
private void insertSort(int[] data, int start, int len) { $%8n,FJ[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yOzKux8kB
} tKGsrgoV
} ^WPV
} +%9Y7qol
} Jc^ozw
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堆排序： vqZM89xY
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package org.rut.util.algorithm.support; q#-H+7 5
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import org.rut.util.algorithm.SortUtil; i>zyn-CuW
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/** =JH,RQ *
* @author treeroot =@XR$Uud6
* @since 2006-2-2 5D*V%v
* @version 1.0 EQO7:vb
*/ *3($s_r>
public class HeapSort implements SortUtil.Sort{ YKd?)$J
P32'`!/:
/* (non-Javadoc) Y @&nW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jhM|gV&
*/ "T=LHjE
public void sort(int[] data) { UF&Wgj [
MaxHeap h=new MaxHeap(); R)Fl@ Tn
h.init(data); :''0z
for(int i=0;i h.remove(); KL~sEli
System.arraycopy(h.queue,1,data,0,data.length); P~Owvs/=
} Xrn~]P7
nzl,y,
private static class MaxHeap{ p:%E>K1<
^ ?9 ~R"
void init(int[] data){ ! NEq|Y
this.queue=new int[data.length+1]; @$G K<jl
for(int i=0;i queue[++size]=data; `"Pd$jW
fixUp(size); "ZW*O{
} )\G#[Pc7
} t]%R4ymV
<sOB j'
private int size=0; <P-r)=^
K\Q 1/})
private int[] queue; j,jUg}b
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public int get() { >z$|O>j
return queue[1]; ]!w52kF7
} 3i~{x[Jc
r'?&VS-Cj
public void remove() { t$iU|^'uV
SortUtil.swap(queue,1,size--); ,Z"sh*
fixDown(1); s:P-F0q!&
} oGJI3Oh
file://fixdown w2GY,,R
private void fixDown(int k) { $hh=-#J8
int j; BJ/%{ C`g
while ((j = k << 1) <= size) { 4HAfTQ 1G
if (j < size %26amp;%26amp; queue[j] j++; ElxbHQj6
if (queue[k]>queue[j]) file://不用交换 r$zXb9a|<
break; N@S;{uK
SortUtil.swap(queue,j,k); k2;yl_7
k = j; J(60eTwQ
} :;QLoZh^
} {S!~pn&^Y
private void fixUp(int k) { E)bP}:4V
while (k > 1) { 3kg+*]tLx
int j = k >> 1; 9'M({/7y
if (queue[j]>queue[k]) 2e&Zs%u
break; isqW?$s
SortUtil.swap(queue,j,k); LBR_Q0EP
k = j; (?(ahtT4T
} ga1RMRu+
} M Cz3RZK
Sob+l'U$
} .H"gH-I
);vU=p"@
} z`CIgSR
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SortUtil： h#>67gJV
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package org.rut.util.algorithm; iC">F.9#
5k@k
import org.rut.util.algorithm.support.BubbleSort; }T6jQ:?@
import org.rut.util.algorithm.support.HeapSort; IiL?@pIq
import org.rut.util.algorithm.support.ImprovedMergeSort; @<+(40`*
import org.rut.util.algorithm.support.ImprovedQuickSort; BScysoeD
import org.rut.util.algorithm.support.InsertSort; "[G P)nC
import org.rut.util.algorithm.support.MergeSort; (1R,
import org.rut.util.algorithm.support.QuickSort; m-K6y7t
import org.rut.util.algorithm.support.SelectionSort; {^v50d
import org.rut.util.algorithm.support.ShellSort; f|EWu
b^ZrevM
/** 59LIK&w
* @author treeroot y}|zH
* @since 2006-2-2 4V=dD<3m
* @version 1.0 ,}<v:!
*/ n*V^Qf
public class SortUtil { L/shF}<
public final static int INSERT = 1; `8Gwf;P1
public final static int BUBBLE = 2; DF#Ob( 1
public final static int SELECTION = 3; )pJzw-m"
public final static int SHELL = 4; )g-*fSa
public final static int QUICK = 5; WZZD
public final static int IMPROVED_QUICK = 6; phTZUmi
public final static int MERGE = 7; Yq.Omr!
public final static int IMPROVED_MERGE = 8; r$+9grm<
public final static int HEAP = 9; h0!j;fn
}b44^iL$9y
public static void sort(int[] data) { @0aUWG!k
sort(data, IMPROVED_QUICK); jjs-[g'}
} C>LkU|[
private static String[] name={ j1g^Q$B>m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7oUYRqd
}; ^0VI J)y
-Q,lUP
private static Sort[] impl=new Sort[]{ _3`{wzMA
new InsertSort(), ^LZU><{';
new BubbleSort(), -.xs=NwB.|
new SelectionSort(), [!v:fj
new ShellSort(), @wB$qd;v
new QuickSort(), %_5B"on
new ImprovedQuickSort(), rZ^DiFR
new MergeSort(), H>VuUH|
new ImprovedMergeSort(), G.9?ApG9
new HeapSort() !X8:#a(
}; nU/v(lN
<^M`U>
public static String toString(int algorithm){ !Y5O3^I=u
return name[algorithm-1]; &a O3N
} gXG1w>
#Ez>]`]TB
public static void sort(int[] data, int algorithm) { ~v2_vEu}JX
impl[algorithm-1].sort(data); 2@=JIMtc
} /mvuSNk
R}*e%EG/
public static interface Sort { i_V~SC`
public void sort(int[] data); d!8`}L:=M
} )Nk^;[
;A1pqHr
public static void swap(int[] data, int i, int j) { D guAeK
int temp = data; m"NZ;*d'
data = data[j]; &c0U\G|j
data[j] = temp; Q4C28-#
} lQldW|S>
} 7\eN8+