[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; tA! M
} 79{.O`v
int i1=l; MPKpS3VS
int i2=mid+1; j}rgOz.
for(int cur=l;cur<=r;cur++){ XlPK3^'N)h
if(i1==mid+1) <pTQpU
data[cur]=temp[i2++]; u8-a-k5<
else if(i2>r) MtpU~c
data[cur]=temp[i1++]; 9{)Z5%Kz
else if(temp[i1] data[cur]=temp[i1++]; [Krm .)
else t4f (Y,v
data[cur]=temp[i2++]; zB#_:(1qK
} LyuSZa]
} MekT?KPQ{L
( oQ'4,F
} N{1.gS
)myf)"l5
改进后的归并排序: l-<3{!
22)0zY%\
package org.rut.util.algorithm.support; D'7A2f
qhV,u;\.
import org.rut.util.algorithm.SortUtil; :`+|'*b(A
Smqr q
/** IvEMg2f}
* @author treeroot hH<6E
* @since 2006-2-2 Q3'fz 9v
* @version 1.0 0hrCG3k.91
*/ 0V<Aub[${
public class ImprovedMergeSort implements SortUtil.Sort { x r-;,W
_7Xd|\Zc
private static final int THRESHOLD = 10; z$9@j2
t[]['Iosd
/* `Mg8]H~
* (non-Javadoc) cJxW;WI!,
* d{QMST2&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &_"ORqn&
*/ ^y&q5p jj
public void sort(int[] data) { ;\<""Yj@l
int[] temp=new int[data.length]; \p5|}<Sr)
mergeSort(data,temp,0,data.length-1); zb"rMzCH
} SQh+5
If~95fy~c
private void mergeSort(int[] data, int[] temp, int l, int r) { >%9^%p^
int i, j, k; J?._/RL8-
int mid = (l + r) / 2; qq OxTG]
if (l == r) O!:QJ ^8d
return; &}vR(y*#c
if ((mid - l) >= THRESHOLD) h7bPAW=(
mergeSort(data, temp, l, mid); EfFz7j&X
else Oq*n9V
insertSort(data, l, mid - l + 1); tRLE,(S,-
if ((r - mid) > THRESHOLD) xU@1!%l@
mergeSort(data, temp, mid + 1, r); _,DO~L
else }sf YCz
insertSort(data, mid + 1, r - mid); +J"' 'cZ
n4^~gT%b5]
for (i = l; i <= mid; i++) { Wt>J`
temp = data; x|.v{tQa
} mfZ)^X
for (j = 1; j <= r - mid; j++) { ]kRI}Om2
temp[r - j + 1] = data[j + mid]; j*tk(o}qG
} t:\l&R&
int a = temp[l]; ~V @;(_T
int b = temp[r]; X6Un;UL
for (i = l, j = r, k = l; k <= r; k++) { p`d XqW
if (a < b) { 7e1dEgn
data[k] = temp[i++]; z<a$q3!#
a = temp; I`22Zwq:
} else { (jMtN?&0H-
data[k] = temp[j--]; -M6L.gi)oJ
b = temp[j]; z(+&wa
} ( :
} A'GlCp
} 5gSylts8
34z_+
/** "\7v
* @param data G@9u:\[l
* @param l 5B1G?`]?
* @param i NeHx2m+
*/ BYS lKTh
private void insertSort(int[] data, int start, int len) { L~IE,4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H#+\nT2m
} jk )Vb
} 3S5^`Ag#
} @|BD|{k
} uG;?vvg>
4:D:|r
堆排序： b6|Z"{TI _
b\:~;
package org.rut.util.algorithm.support; ZP-dW|<[x
!K[/L< Kv
import org.rut.util.algorithm.SortUtil; |8bE9qt.P
lK*jhW?3:
/** 80|onP\L
* @author treeroot <|a=hHPi:
* @since 2006-2-2 \^9pW 2v
* @version 1.0 EJ`Q8uz
*/ :/6()_>bO
public class HeapSort implements SortUtil.Sort{ s _~IZ%+<.
A#(`9
/* (non-Javadoc) ur6e&bTp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #,&8&
*/ _wz2
public void sort(int[] data) { J_PH7Z*=,
MaxHeap h=new MaxHeap(); UgC)7 K1
h.init(data); oCVku:.
for(int i=0;i h.remove(); OqBC/p B
System.arraycopy(h.queue,1,data,0,data.length); @TysXx
} )|pU.K9qZ
/YFa ;2 W
private static class MaxHeap{ ZYa\"zp-
\]8VwsP
void init(int[] data){ }~F~hf>s
this.queue=new int[data.length+1]; ^LVk5l)\>g
for(int i=0;i queue[++size]=data; Umz05*
fixUp(size); y@3Q;~l,
} L6+C]t}>6
} 9/@ &*
paWxanSt
private int size=0; .xl.P7@JJ
(9]6bd
private int[] queue; zT7"VbP
(~&w-w3
public int get() { BqB|Fo
return queue[1]; :H?f*aw
} \lEkfcc
zb:kanb-
public void remove() { W pN.]x
SortUtil.swap(queue,1,size--); & fu z2xv
fixDown(1); {E51Kv&_
} ;1`!wG-DD
file://fixdown 2Lfah?Tx~C
private void fixDown(int k) { E]1##6Ae
int j; V&*D~Jq
while ((j = k << 1) <= size) { WK==j1
if (j < size %26amp;%26amp; queue[j] j++; s?c JV`
if (queue[k]>queue[j]) file://不用交换 5/?P|T
break; @7W?8
SortUtil.swap(queue,j,k); qSTWb%
k = j; rslvsS:
} jXp. qK\"
} <bUXC@3W
private void fixUp(int k) { @?Zf-.
while (k > 1) { @h}`DNaZ^
int j = k >> 1; j (ygQ4T
if (queue[j]>queue[k]) b7Oj<!Wo`
break; "|t!7hC
SortUtil.swap(queue,j,k); sn"fK=,#g
k = j; SkHYXe"]
} {x{H$f
} #{*LvI&
xE1'&!4O
} ZzcPiTSO
V_"f|[1
} AnMV <
,mKObMu
SortUtil： TH4\HY9qa?
(0L=AxH
package org.rut.util.algorithm; vtyx`F f
F*` t"7Lm
import org.rut.util.algorithm.support.BubbleSort; &| !B!eOY
import org.rut.util.algorithm.support.HeapSort; iZxt/}1X0
import org.rut.util.algorithm.support.ImprovedMergeSort; exZLj0kvF
import org.rut.util.algorithm.support.ImprovedQuickSort; LZ<[ll#C
import org.rut.util.algorithm.support.InsertSort; xu\eXx6H
import org.rut.util.algorithm.support.MergeSort; e |V]
import org.rut.util.algorithm.support.QuickSort; %tmp
import org.rut.util.algorithm.support.SelectionSort; (3;@^S4&w
import org.rut.util.algorithm.support.ShellSort; zzIr2so
e2w&&B-
/** EzpFOqJG
* @author treeroot 5=L} \ankn
* @since 2006-2-2 %3o`j<
* @version 1.0 =&vFVIhWcf
*/ q \O Ou
public class SortUtil { !SxG(*u
public final static int INSERT = 1; & mt)d
public final static int BUBBLE = 2; vt1lR5
public final static int SELECTION = 3; !{Z~<Ky
public final static int SHELL = 4; LFf`K)q
public final static int QUICK = 5; QyGnDomQ
public final static int IMPROVED_QUICK = 6; <9eu1^g
public final static int MERGE = 7; zT#`qCbT'J
public final static int IMPROVED_MERGE = 8; :]WqfR)#
public final static int HEAP = 9; Zu/<NC (
+Qj(B@i
public static void sort(int[] data) { F)Oe9x\/
sort(data, IMPROVED_QUICK); f.6~x$:)`E
} rs-,0'z,7
private static String[] name={ )T|L,Lp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %J~WC$=Qv
}; p&Ed\aQ%z;
_O]xey^r
private static Sort[] impl=new Sort[]{ 7%;_kFRV
new InsertSort(), p2%
new BubbleSort(), )uheV,ZnY
new SelectionSort(), }}r> K}
new ShellSort(), FN^FvQ
new QuickSort(), GP a`e
new ImprovedQuickSort(), PaWr[ye
new MergeSort(), $`J_:H%
new ImprovedMergeSort(), #07!-)Gv
new HeapSort() t ^SzqB
}; eu#'SXSC F
_ZY\,_
public static String toString(int algorithm){ UE"GJt`I
return name[algorithm-1]; ](jFwxU
} \Qy$I-Du
",Cr,;]
public static void sort(int[] data, int algorithm) { PXk?aJ
impl[algorithm-1].sort(data); !L24+$
} j/!H$0PN
q(IQa@$SR
public static interface Sort { H/fUM
public void sort(int[] data); ]$b2a&r9
} *rh,"Zo
#,NvO!j<4
public static void swap(int[] data, int i, int j) { #& ?g %'
int temp = data; Jkt4@h2Q}
data = data[j]; 6iA( o*'Yn
data[j] = temp; "Cz<d w]D
} kG0Yh2;#
} kg97S