[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Q}Vho.N@=
} !%M-w0vC9
int i1=l; 1aMBCh<}JN
int i2=mid+1; |QgXSe7
for(int cur=l;cur<=r;cur++){ ;%z0iZmg
if(i1==mid+1) R;V(D3
data[cur]=temp[i2++]; 5BCaE)J
else if(i2>r) 'Jl.fN
data[cur]=temp[i1++]; s3kEux^
else if(temp[i1] data[cur]=temp[i1++]; mg,f>(
else .y2<2eW
data[cur]=temp[i2++]; }>XSp)"{l
} (&hX8
} 7<:w-
(1}Ndo^;w
} ?h3Ow`1G
m<f{7]fi5
改进后的归并排序: d<b,LD^
E:E&Wv?r
package org.rut.util.algorithm.support; yRi/YR#
# nYGKZ
import org.rut.util.algorithm.SortUtil; /eMZTh*1P
qiF~I0_0
/** jh0$:6 `C
* @author treeroot X9gC2iSs]
* @since 2006-2-2 Z "=(uwM
* @version 1.0 #"yf^*wX
*/ 7ER 2h*
public class ImprovedMergeSort implements SortUtil.Sort { ?Ru`ma\;
^{K8uN7
private static final int THRESHOLD = 10; qL+y8*
d=KOV;~);
/* *nW9)T
* (non-Javadoc) 8k`zMT
* R39R$\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KE&}*Nf[
*/ G-^ccdT
public void sort(int[] data) { W=\dsdnu*
int[] temp=new int[data.length]; _TXV{<E6
mergeSort(data,temp,0,data.length-1); omA*XXUx=8
} `U3
E\*",MGL
private void mergeSort(int[] data, int[] temp, int l, int r) { 9cmJD5OO
int i, j, k; +?:V\niQI
int mid = (l + r) / 2; \ +xIH
if (l == r) PC_4#6^5
return; &"h!SkX/
if ((mid - l) >= THRESHOLD) ,< icW&a
mergeSort(data, temp, l, mid); uWInx6p
else rpT<cCem1
insertSort(data, l, mid - l + 1); N]<gHGj}
if ((r - mid) > THRESHOLD) XfrnM^oty
mergeSort(data, temp, mid + 1, r); _dBU6U:V
else ~&/Gx_KU
insertSort(data, mid + 1, r - mid); _z5CplO
C|zH {.H
for (i = l; i <= mid; i++) { %Nn'p"
temp = data; !m|%4/ M@
} [;f"',)y,
for (j = 1; j <= r - mid; j++) { e`Yns$x
temp[r - j + 1] = data[j + mid]; 8)!;[G|
} ,7g;r_qwA
int a = temp[l]; m8PB2h
int b = temp[r]; y4L9Cxvs
for (i = l, j = r, k = l; k <= r; k++) { NFc8"7Mz}
if (a < b) { a!K;8#xc
data[k] = temp[i++]; \-0`%k"&
a = temp; rw2|1_AF
} else { DS2$w9!
data[k] = temp[j--]; L>b,}w
b = temp[j]; "y0A<-~
} 9.=#4OH/
} 8W>l(w9M
} dSZ#,Ea"
//@=Q!MW
/** X8x>oV;8
* @param data 7$=@q|$
* @param l +3>4 ?,^g
* @param i ;LE @Ezx
*/ fdG.=7`
private void insertSort(int[] data, int start, int len) { 6I#DlAU@v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $IT9@}*{
} wcf_5T
} ACYn87tq
} ;alFK*K6
} FO=1P7
m_ m@>}ud
堆排序： OP}p;(
\AzcW;03g[
package org.rut.util.algorithm.support; AyO|9!F@A
_[o^23Hj
import org.rut.util.algorithm.SortUtil; K:@=W1
I}IW!K
/** 2QRn c"
* @author treeroot |=T<WU1$
* @since 2006-2-2 q*nz4QTOE
* @version 1.0 W@dY:N}
*/ UJ$:5*S=u
public class HeapSort implements SortUtil.Sort{ T6roz
p&mtKLv
/* (non-Javadoc) G9inNz*Cx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yWtr,
*/ u(Sz$eV
public void sort(int[] data) { a?~csP^?}
MaxHeap h=new MaxHeap(); ONiI:Z>%
h.init(data); z44~5J]
for(int i=0;i h.remove(); o~&!M_ED
System.arraycopy(h.queue,1,data,0,data.length); 3&fFIab9
} /*^|5>-`i1
Z;\"pP:
private static class MaxHeap{ 6ya87H'e@
<@2# VG
void init(int[] data){ f;H#TSJ
this.queue=new int[data.length+1]; Wb)l8[=
for(int i=0;i queue[++size]=data; ;w(1Ydo
fixUp(size); D])YP0|}
} >?eTbtP
} Pm(:M:a
uE`|0
private int size=0; :$c:3~
'2$!thm
private int[] queue; DF|s,J`98
zn1Rou]6
public int get() { WcO,4:
return queue[1]; ;;hyjFGq%
} t`ceVS
"ak9LZQ9z
public void remove() { 5qkuKF
SortUtil.swap(queue,1,size--); lV6[d8P
fixDown(1); 0uO=wOIhH
} WAXts]=
file://fixdown m<"fRT!Y
private void fixDown(int k) { RLOQ>vYY
int j; yUmsE-W
while ((j = k << 1) <= size) { ]~S+nlyd<
if (j < size %26amp;%26amp; queue[j] j++; tlLn
if (queue[k]>queue[j]) file://不用交换 )z235}P
break; {a8^6dm*E
SortUtil.swap(queue,j,k); ]j2v"n
k = j; Pph8"`mv.m
} i6#]$B
} T) tZU?
private void fixUp(int k) { ;GFB@I@
while (k > 1) { s[2ZxCrCw
int j = k >> 1; )1nCw
if (queue[j]>queue[k]) #3yw
break; 83ic@[
SortUtil.swap(queue,j,k); S50x0$%<W
k = j; I cR;A\z
} h`h>H X
} k7|z$=zY
0O,T=z[+>
} oA;Ty7s
^h6$>n5
} 1~5q:X
H4'DL'83
SortUtil： ''OInfd?
wYO"znd
package org.rut.util.algorithm; b}Hl$V(uD
1m<?Q&|m$
import org.rut.util.algorithm.support.BubbleSort; !H|82:`t+
import org.rut.util.algorithm.support.HeapSort; Ryba[Fz4Di
import org.rut.util.algorithm.support.ImprovedMergeSort; Hn9F gul&
import org.rut.util.algorithm.support.ImprovedQuickSort; h>Uid &:?
import org.rut.util.algorithm.support.InsertSort; vo6[2.HS
import org.rut.util.algorithm.support.MergeSort; .d~]e2x
import org.rut.util.algorithm.support.QuickSort; V l~Y
import org.rut.util.algorithm.support.SelectionSort; C7 ]DJn
import org.rut.util.algorithm.support.ShellSort; F\=Rm
Ep\
/** k/_8!^:'
* @author treeroot |[owNV>
* @since 2006-2-2 7XVzd]jH
* @version 1.0 ocl47)
*/ >PJtG]D
public class SortUtil { {#1j"
public final static int INSERT = 1; 2'<=H76
public final static int BUBBLE = 2; De nt?
public final static int SELECTION = 3; Awa|rIM
public final static int SHELL = 4; |v$%V#Bo
public final static int QUICK = 5; \YlF>{LVe
public final static int IMPROVED_QUICK = 6; -M:hlwha
public final static int MERGE = 7; 71l"m^Z3zy
public final static int IMPROVED_MERGE = 8; MzR1<W{ O
public final static int HEAP = 9; wHOlj)CZ
o\]:!#r{T
public static void sort(int[] data) { HLSfoQ&)v
sort(data, IMPROVED_QUICK); juCG?}di;
} XnE %$NJ
private static String[] name={ 9jMC|oE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H\=LE
}; LGo2^Xx
6i]Nr@1C
private static Sort[] impl=new Sort[]{ k~1j/VHv
new InsertSort(), oT|P1t.
new BubbleSort(), j(%gMVu
new SelectionSort(), 'z-;*!A}j
new ShellSort(), L`jB)wF/J
new QuickSort(), aI={,\
new ImprovedQuickSort(), $K?T=a;z
new MergeSort(), )pjjW"C+
new ImprovedMergeSort(), lHcZi
new HeapSort() WXLe,7y
}; {}g %"mi#
Z(Eke
public static String toString(int algorithm){ N4a`8dS|
return name[algorithm-1]; Z#4JA/c!
} coF T2Pq
% QPWw~}:
public static void sort(int[] data, int algorithm) { BEXQTM3])I
impl[algorithm-1].sort(data); h"u<E\g
} 'T)Or,d
m%oGzx+
public static interface Sort { C{UF~
public void sort(int[] data); Q(IJD4
} C#Hcv*D
~5r=FF6
public static void swap(int[] data, int i, int j) { I(OAEIz
int temp = data; QN_)3lm
data = data[j]; aJ:A%+1
data[j] = temp; Xr?>uqY!M
} ='dLsh4P2N
} 3:[!t%Yb