[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; uL3Eq>~x
} " R-!(9k^`
int i1=l; OiE;B
int i2=mid+1; YnxRg
for(int cur=l;cur<=r;cur++){ ]8icBneA~'
if(i1==mid+1) |N}P(GF
data[cur]=temp[i2++]; H^.IY_I`U*
else if(i2>r) 6oLwfTy
data[cur]=temp[i1++]; (9<guv
else if(temp[i1] data[cur]=temp[i1++]; Q$:![}[(
else ow0!%|fO
data[cur]=temp[i2++]; rS4@1`/R
} vG;zJ#c
} AC;V m: @{
u0#}9UKQ
} >.'<J]
\MjJ9u `8
改进后的归并排序: NPd%M
NzU,va N
package org.rut.util.algorithm.support; qf=1?=l291
O~59FuL
import org.rut.util.algorithm.SortUtil; ,Z{d.[$
dn}`i
/** rg{9UVj
* @author treeroot ?p(/_@
* @since 2006-2-2 5v?;PX
* @version 1.0 ynw5-aS3
*/ )$`wIp
public class ImprovedMergeSort implements SortUtil.Sort { [@Q_(LQ-U
- /(s#D
private static final int THRESHOLD = 10; /v/C<]
H"C[&r
/* {}QB|IH`
* (non-Javadoc) -S$1Yn
* >m#e:[N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }';D]c
*/ m=:4`_0Q
public void sort(int[] data) { e|&6$A>4]
int[] temp=new int[data.length]; `5~ +,/Ys
mergeSort(data,temp,0,data.length-1); $2M#qkik-
} [74F6Qp
^=:9)CNw(
private void mergeSort(int[] data, int[] temp, int l, int r) { NvHJ3>"%
int i, j, k; BWrv%7
int mid = (l + r) / 2; !2z?YZhu
if (l == r) : C b&v07
return; AgRjr"hF*e
if ((mid - l) >= THRESHOLD) 1fo U
mergeSort(data, temp, l, mid); rp6q?3=g
else ^':!1
insertSort(data, l, mid - l + 1); j:,NE(DF
if ((r - mid) > THRESHOLD) F:D orE
mergeSort(data, temp, mid + 1, r); <JV"@H=
else Kh4$ wwn
insertSort(data, mid + 1, r - mid); +<}0|Xl&
wWSdTLX
for (i = l; i <= mid; i++) { K{ \;2M
temp = data; `E!N9qI?t$
} "Vr[4&`
for (j = 1; j <= r - mid; j++) { vk>b#%1{
temp[r - j + 1] = data[j + mid]; ~}!3G
} ?[&2o|
int a = temp[l]; u$D*tqxG
int b = temp[r]; (u]N
for (i = l, j = r, k = l; k <= r; k++) { ?x+Z)`w_
if (a < b) { O/.Uh`T`6
data[k] = temp[i++]; *dvDap|8W
a = temp; 8a_[B~
} else { kl"+YF5/
data[k] = temp[j--]; "*;;H^d
b = temp[j]; /sr2mt-Q
} u(OW gbA3
} eL4NB$Fb
} "wlt> SU
P\]B<
/** 70lfb`
* @param data U,+[5sbo
* @param l v^ /Q 8Q
* @param i .AYj'Y
*/ @"Z7nJX
private void insertSort(int[] data, int start, int len) { :> &fV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y!5$/`AF
} (ewe"N+
} kPQtQh]y%
} $5v0m#[^
} dJv!Dts')C
'S2bp4G
堆排序： K"uNxZ
->h6j
package org.rut.util.algorithm.support; !r`,=jK"
1Nu1BLPm
import org.rut.util.algorithm.SortUtil; gtYAHi
l^d[EL+
/** +4\U)Z/\
* @author treeroot \o\nr!=k
* @since 2006-2-2 >XOiu#kC
* @version 1.0 U|HB=BP
*/ Y=`
public class HeapSort implements SortUtil.Sort{ (;%|-{7e-
nuoPg3Nl
/* (non-Javadoc) TRZRYm"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JT9N!CGZ
*/ xAu/
public void sort(int[] data) { ,v&L:a
MaxHeap h=new MaxHeap(); +kq'+Y7
h.init(data); i5>+}$1
for(int i=0;i h.remove(); 5@hNnh16
System.arraycopy(h.queue,1,data,0,data.length); n!6Z]\8~$
} '|7Woxl9
|7B!^ K
private static class MaxHeap{ c*`>9mv
goJ|oi
void init(int[] data){ saU]`w_Z*
this.queue=new int[data.length+1]; OEPa|rb
for(int i=0;i queue[++size]=data; -k(CJ5H9
fixUp(size); sz--27es
} __[xD\ES
} A~Xq,BxCV
zZiJ 9 e
private int size=0; m=Q[\.Ra
<*t4D-os
private int[] queue; U!XS;a)
A:y.s;<L0
public int get() { c}[+h5
return queue[1]; 5/gDK+%4D(
} dq IlD!
P]i =r] i
public void remove() { V:/7f*n7
SortUtil.swap(queue,1,size--); _SACqamo5s
fixDown(1); JlKM+UE:
} +,v-=~5
file://fixdown <!pQ
private void fixDown(int k) { cst}Ibfi
int j; 7O`o ovW$
while ((j = k << 1) <= size) { ](eN@Xi&@
if (j < size %26amp;%26amp; queue[j] j++; ^`SA'F,
if (queue[k]>queue[j]) file://不用交换 )2DQ>cm
break; XhdSFxW}
SortUtil.swap(queue,j,k); xyH/e*a
k = j; Z+pom7A"E
} p"*y58
} CC;! <km
private void fixUp(int k) { 'cNKjL;
while (k > 1) { ds[QwcV9-
int j = k >> 1; $T<}y_nHl
if (queue[j]>queue[k]) 5efxEt>U
break; g(O;{Q_
SortUtil.swap(queue,j,k); O+=vEp(
k = j; -Q;#sJ?
} +>7$4`Nb2
} Y${l!+q
O[9-:,B{w
} >)_ojDO
5]1leT
} ecOy6@UDY
d7cg&9+
SortUtil： !3oKmL5
Wk^RA_
package org.rut.util.algorithm; mL~z~w*s
m-T~fJ
import org.rut.util.algorithm.support.BubbleSort; 2X-l{n;>
import org.rut.util.algorithm.support.HeapSort; fqs]<qi
import org.rut.util.algorithm.support.ImprovedMergeSort; 91of~ffh
import org.rut.util.algorithm.support.ImprovedQuickSort; ==/n(LBD
import org.rut.util.algorithm.support.InsertSort; $jI>[%
import org.rut.util.algorithm.support.MergeSort; TP1S[`nR
import org.rut.util.algorithm.support.QuickSort; Gjz[1d
import org.rut.util.algorithm.support.SelectionSort; Sd IX-k.
import org.rut.util.algorithm.support.ShellSort; }.)s%4p8
cgC\mM4Nla
/** #JA}3]
* @author treeroot `\<37E\N}
* @since 2006-2-2 ,jy*1Hjd
* @version 1.0 }a&mY^
*/ Pw@olG'Ah
public class SortUtil { 5&CDHc7Oj
public final static int INSERT = 1; rZ_>`}O2
public final static int BUBBLE = 2; VohhQ
public final static int SELECTION = 3; 5)zn:$cz
public final static int SHELL = 4; (1pEEq84
public final static int QUICK = 5; O`cu_
public final static int IMPROVED_QUICK = 6; ? 81X
public final static int MERGE = 7; :f'&z47
public final static int IMPROVED_MERGE = 8; '#O_}|ZN
public final static int HEAP = 9; kE;O7sN
"`A:(<x
public static void sort(int[] data) { !c<wSQ,
sort(data, IMPROVED_QUICK); =He.fEy
} pz_e=xr
private static String[] name={ LT+3q%W.UC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'ul\Q`N3
}; K8^kJSF\
ly4Qg\l
private static Sort[] impl=new Sort[]{ 0"xPX#Cvj
new InsertSort(), rFJ[dz
new BubbleSort(), AB.(CS=i
new SelectionSort(), S"snB/
new ShellSort(), ,D80/2U^
new QuickSort(), `PI(%N
new ImprovedQuickSort(), XeUC0K[D
new MergeSort(), }bB`(B,m
new ImprovedMergeSort(), h3u1K>R)
new HeapSort() ]_*S~'x
}; =lr)gj
K.>wQA&
public static String toString(int algorithm){ -ewQp9)G
return name[algorithm-1]; V7=SV:+1or
} S+x_c4 T
<o:@dS
public static void sort(int[] data, int algorithm) { [JTto!Ih$
impl[algorithm-1].sort(data); E\2Ml@J
} 8{&["?
Sn3:x5H,l
public static interface Sort { ^9"KTZc-*
public void sort(int[] data); i4Z4xTn
} >tRHNB_
i6no;}j
public static void swap(int[] data, int i, int j) { nl/UdgI
int temp = data; b_$1f>
data = data[j]; qFRdg V>8
data[j] = temp; 96|[}:+$&:
} ,ul5,ygA
} 5K56!*Y