[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; -JOtvJIQI
} ,]HH%/h
int i1=l; DM"nxTVre
int i2=mid+1; >zcR ?PPs
for(int cur=l;cur<=r;cur++){ {n9]ej^
if(i1==mid+1) SXX6EIJr|
data[cur]=temp[i2++]; /V@~Vlww
else if(i2>r) Ny|2Fcs
data[cur]=temp[i1++]; ,ErJUv
else if(temp[i1] data[cur]=temp[i1++]; u1K;{>4lx
else BeP]M1\?>
data[cur]=temp[i2++]; q#9JJWSs
} >7%Gd-;l
} `s HrC
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} yZ?|u57
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改进后的归并排序: N8a+X|3]0
p6~\U5rXm
package org.rut.util.algorithm.support; Yw7+wc8R
^Wb|Pl
import org.rut.util.algorithm.SortUtil; 0<f\bY02
v+XB$j^H
/** H]e%8w))0
* @author treeroot sevaNs
* @since 2006-2-2 p)l>bC?3
* @version 1.0 zK.%tx}+=k
*/ [/_M!&zz2
public class ImprovedMergeSort implements SortUtil.Sort { H^y%Bi&^
;/gH6Z?
private static final int THRESHOLD = 10; iW.4'9
On%21L;JG
/* MZp`
* (non-Javadoc) >C,=elM
* QC@nRy8%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hAx#5@*5
*/ 3^p<Wx
public void sort(int[] data) { /C)mx#h]
int[] temp=new int[data.length]; bvdAOvxChW
mergeSort(data,temp,0,data.length-1); pqmb&"l
} .b'o}DLa
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private void mergeSort(int[] data, int[] temp, int l, int r) { AITV+=sN
int i, j, k; W vh3Y,|3
int mid = (l + r) / 2; TAfLC)
if (l == r) m$nT#@l5bH
return; AgKG>%0
if ((mid - l) >= THRESHOLD) E.*TJ
mergeSort(data, temp, l, mid); 6zuWG0t
else E/x2LYH
insertSort(data, l, mid - l + 1); (`S32,=TS
if ((r - mid) > THRESHOLD) V%k #M
mergeSort(data, temp, mid + 1, r); {#>>dILPr
else :N!Fe7H,
insertSort(data, mid + 1, r - mid); =.vc={_?
rv`kP"I
for (i = l; i <= mid; i++) { {2u#Q7]|
temp = data; aLr\Uq,83
} m1,?rqeb
for (j = 1; j <= r - mid; j++) { Yphru"\$
temp[r - j + 1] = data[j + mid]; 1rs`|iX5
} nNbOq[
int a = temp[l]; RmXC ^VQ
int b = temp[r]; "#7~}ZB
for (i = l, j = r, k = l; k <= r; k++) { z"4UObVs
if (a < b) { ?UD2}D[M
data[k] = temp[i++]; k-5Enbkr
a = temp; 32DT]{-N!
} else { 3;fuz Kk@b
data[k] = temp[j--]; _-^bAr`z
b = temp[j]; 1J8okBhZ
} 8?ig/HSt2
} C@!C='b,
} dWR0tS6vR`
,E&PIbDL1
/** P'Q|0lB
* @param data tI651Wm9
* @param l 5sbMp;ZM
* @param i V6)e Jy
*/ bWc3a
private void insertSort(int[] data, int start, int len) { qJq49}2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UhQsT^b_
} {(mT,}`4
} S*3N6*-l"
} dz^l6<a"n
} 1pe eecE
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堆排序： F8e]sa$K\
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package org.rut.util.algorithm.support; \0&7^
:',.I
import org.rut.util.algorithm.SortUtil; ^,@!L-<~(b
SM>V o+
/** #$h~QBg
* @author treeroot &Nf10%J'<
* @since 2006-2-2 v7rEUS-
* @version 1.0 t*<@>]k
*/ DDdMWH^o7
public class HeapSort implements SortUtil.Sort{ J%|!KQl
25xpq^Zw
/* (non-Javadoc) eKdF-;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D ff0$06Nq
*/ :W'Yt9v)
public void sort(int[] data) { J23Tst#s
MaxHeap h=new MaxHeap(); >;@ _TAF
h.init(data); bn`1JI@S4
for(int i=0;i h.remove(); >Mml+4<5
System.arraycopy(h.queue,1,data,0,data.length); fhx_v^<X
} tb;!2$
2qEm,x'S
private static class MaxHeap{ BE n$~4-
}?f%cRT$
void init(int[] data){ Xg>nb1e
this.queue=new int[data.length+1]; R"Q=U}?$
for(int i=0;i queue[++size]=data; \x JGR!
fixUp(size); .h)o\6Wq
} uyr56
} CXqU<a&
)6?(K"T
private int size=0; y%.^| G
an+`>}]F
private int[] queue; lq2P10j@
rCGyr}(NC
public int get() { (_^pX
return queue[1]; YGy.39@31
} 7P}&<;5zD
*b+ef
public void remove() { 1+;Z0$edxz
SortUtil.swap(queue,1,size--); %T:~N<8)
fixDown(1); _c*0Rr
} Kyy CS>
file://fixdown "S6'<~s
private void fixDown(int k) { ]Lg$p
int j; N?`-$C ]
while ((j = k << 1) <= size) { CRy;>UI
if (j < size %26amp;%26amp; queue[j] j++; <^j,jX
if (queue[k]>queue[j]) file://不用交换 ]IQTf5n
break; B%HG7
SortUtil.swap(queue,j,k); 8BnI0l=\
k = j; Fl,(KSTz
} c}9.Or`?
} YGVj$\
private void fixUp(int k) { GC(:}e|
while (k > 1) { eil"1$k
int j = k >> 1; 83,ATQg
if (queue[j]>queue[k]) STMc@MeZU_
break; yLfb'Ba
SortUtil.swap(queue,j,k); 8=;'kEU
k = j; %{$iN|%J%$
} P$E#C:=
} `Q d_Gu,M
a4gJ-FE
} %%["&
#K1VPezN
} v]CH L# |
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SortUtil： T_}9b
wfH#E2+pk
package org.rut.util.algorithm; Gni<@;}
]qZs^kQ
import org.rut.util.algorithm.support.BubbleSort; Y#3<w
import org.rut.util.algorithm.support.HeapSort; -3 .Sr|t
import org.rut.util.algorithm.support.ImprovedMergeSort; -eH5s3:A
import org.rut.util.algorithm.support.ImprovedQuickSort; \W5fcxf
import org.rut.util.algorithm.support.InsertSort; tuzw%=Ey
import org.rut.util.algorithm.support.MergeSort; rwb7>]UI"d
import org.rut.util.algorithm.support.QuickSort; u~Zx9>f
import org.rut.util.algorithm.support.SelectionSort; $q`650&S*
import org.rut.util.algorithm.support.ShellSort; E"p;
9&R. <I
/** XW]'by
* @author treeroot $RxS<_tj
* @since 2006-2-2 &6-udZB-
* @version 1.0 b,]QfC
*/ 2y/|/IW=
public class SortUtil { eh=.Q<N
public final static int INSERT = 1; HyKvDJ 3_
public final static int BUBBLE = 2; \{W}
public final static int SELECTION = 3; o+e:HjZZ
public final static int SHELL = 4; <d".v
public final static int QUICK = 5; Opc, {,z6
public final static int IMPROVED_QUICK = 6; .t\#>Fe
public final static int MERGE = 7; }Gmwm|`*
public final static int IMPROVED_MERGE = 8; V=%j]`Os
public final static int HEAP = 9; 6?an._ C
{DzOXTI[Y
public static void sort(int[] data) { rPf<8oH
sort(data, IMPROVED_QUICK); 9ohaU
} ]"Y? ZS;H
private static String[] name={ 9r,)Bw!RP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9os>k*
}; 9V5}%4k%+
>OP[qj
private static Sort[] impl=new Sort[]{ 0[(TrIpXl
new InsertSort(), N#(p_7M
new BubbleSort(), I<p- o/TP
new SelectionSort(), Z(F`M;1>xI
new ShellSort(), X6lkz*M.
new QuickSort(), (* WO<V
new ImprovedQuickSort(), neN #Mo'A
new MergeSort(), V\U,PNkZQ
new ImprovedMergeSort(), 1D3{\v
new HeapSort() g"pjWj)?
}; _.b^4^[
[I*zZ`
public static String toString(int algorithm){ H_H3Gp
return name[algorithm-1]; O}Y& @V%4k
} VKI`@rY4
@w?y;W!a>
public static void sort(int[] data, int algorithm) { MM_c{gFF
impl[algorithm-1].sort(data); .UJp#/EHs
} 8|FHr,
Npq_1L
public static interface Sort { Aj9<4N
public void sort(int[] data); ?)x"+[2
} 6Z2a5zO8
"UUzLa_
public static void swap(int[] data, int i, int j) { ;JQ:S~K9
int temp = data; 9|y?jb5im
data = data[j]; pP JhF8Dt
data[j] = temp; h+,Eu7\88
} PNNY_t +I
} KmUH([#