[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; B[S.6"/H
} 7iLm_#M
int i1=l; o-lb/=K+
int i2=mid+1; }Xrs"u,
for(int cur=l;cur<=r;cur++){ OMvwmm
if(i1==mid+1) os/~6
data[cur]=temp[i2++]; P@PZm
else if(i2>r) %+Z0$Q
data[cur]=temp[i1++]; #CW]70H`
else if(temp[i1] data[cur]=temp[i1++]; eW1$;.^
else {5#P1jlT
data[cur]=temp[i2++]; dY;^JPT
} `[jQn;
} dV<M$+;s]
InH R>,
} cx_[Y
=c(_$|0
改进后的归并排序: 4CW/
U#Wc!QN-t
package org.rut.util.algorithm.support; uQ vW@Tt
Gyjx:EM
import org.rut.util.algorithm.SortUtil; 5l=B,%s
9RE{,mos2v
/** "SNsOf
* @author treeroot t TA6 p
* @since 2006-2-2 MPAZ%<gmD
* @version 1.0 ?\<2*sW [k
*/ GH7{_@pv8
public class ImprovedMergeSort implements SortUtil.Sort { P9B@2#
0u,=OvU
private static final int THRESHOLD = 10; PJAE~|a
j<szQ%tJlI
/* _>dqz(8#
* (non-Javadoc) >tr_Ypfv,c
* x/[i &Gkv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k{s#wJA
*/ Av.(i2
public void sort(int[] data) { o!q9pt
int[] temp=new int[data.length]; /JEH%)
mergeSort(data,temp,0,data.length-1); (|'w$
} xp)#a_}
V~Tjz%<
private void mergeSort(int[] data, int[] temp, int l, int r) { W ;P1T"*A
int i, j, k; R`76Ae`R8
int mid = (l + r) / 2; u5H#(&Om
if (l == r) }<2F]UuR
return; a_waLH/
if ((mid - l) >= THRESHOLD) }(ay(
mergeSort(data, temp, l, mid); Te[[xhTyw
else j /)cdP
insertSort(data, l, mid - l + 1); pEH[fA]
if ((r - mid) > THRESHOLD) T55l-.>
mergeSort(data, temp, mid + 1, r); )_GM&-
else MeQ(,irr^
insertSort(data, mid + 1, r - mid); ,RCjfXa
\$?[>=<wB
for (i = l; i <= mid; i++) { x3PeU_9
temp = data; ii2oWU
} \CUxGyu
for (j = 1; j <= r - mid; j++) { fOE:~3Q
temp[r - j + 1] = data[j + mid]; rHT8a^MO
} M0=ZAsN
int a = temp[l]; &I'~:nWpt
int b = temp[r]; ~<v{CBq[
for (i = l, j = r, k = l; k <= r; k++) { @T;O^rE~N
if (a < b) { 6|T{BOW!d
data[k] = temp[i++]; [cXu<vjFM
a = temp; Jgtvia
} else { 2mu~hJ
data[k] = temp[j--]; f#eTi&w
b = temp[j]; AA>5h<NM
} Wn0r[h5t
} <Ks?g=K-
} eb9qg.9Z
n 8AND0a1C
/** u%XFFt5
* @param data @]3(l
* @param l nXi6Q+YI
* @param i KS*W<_I
*/ *n}9_V%
private void insertSort(int[] data, int start, int len) { *XniF~M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qgI Jg6x/}
} ;jX_e(T3m
} =!#DUfQf
} R&ou4Y:DG
} ?z:xQ*#X
^z[s;:-
堆排序： \RQ5$!O
Y1`.
package org.rut.util.algorithm.support; s$H5W`3
hXz"}X n
import org.rut.util.algorithm.SortUtil; &CUkR6
+S;8=lzuV
/** s3J T1TX
* @author treeroot x-tA{_:
* @since 2006-2-2 }Q\yem
* @version 1.0 et9c<'
*/ pM(y?zGt
public class HeapSort implements SortUtil.Sort{ :\4O9f*5+
})mez[UmZ
/* (non-Javadoc) U}gYZi;;$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JiI(?I
*/ ?MpGzCPa
public void sort(int[] data) { Q=^}B}G
MaxHeap h=new MaxHeap(); ya:H{#%6
h.init(data); l' "<
for(int i=0;i h.remove(); #:s'&.6
System.arraycopy(h.queue,1,data,0,data.length); &RROra
} >W-e0kkH
D|=QsWZI
private static class MaxHeap{ 'O{hr0q}
Jc:G7}j6
void init(int[] data){ PU-~7h+$
this.queue=new int[data.length+1]; l_,8_u7G
for(int i=0;i queue[++size]=data; <}4|R_xY#
fixUp(size); 6@l:(-(j2A
} "Ww^?"jQ)
} cst=ms
"K\Rq+si
private int size=0; nF=Ig-NX^
4a!L/m*
private int[] queue; jU4Ir{f
>@oO7<WB
public int get() { S?Eg
return queue[1]; 8De `.!Gg
} o,aI<5"
e;!<3b
public void remove() { NoKYHN^*w
SortUtil.swap(queue,1,size--); i^QcW!X&
fixDown(1); (qPZEZKx
} %+pXzw`B
file://fixdown <78>6u/W%
private void fixDown(int k) { !2{MWj
int j; 58v5Z$%--
while ((j = k << 1) <= size) { A@DIq/^xM
if (j < size %26amp;%26amp; queue[j] j++; Qz$.t>@V=
if (queue[k]>queue[j]) file://不用交换 UI8M<
break; uk\GAm@O
SortUtil.swap(queue,j,k); 7s.sbP~
k = j; {ld([
} PMrvUM62
} Nm;ka&'
private void fixUp(int k) { Q2fa]*Z5
while (k > 1) { MaMs(
int j = k >> 1; C}00S{nAZ
if (queue[j]>queue[k]) 7XwFO0==
break; UyF]gO
SortUtil.swap(queue,j,k); ]\_4r)cN<n
k = j; F[?t"d
} DH9?~|
} KRXe\Sx
g8qN+Gg
} l7x%G@1#~W
qY0Ic5wCY
} |faXl3|
$hEX,
SortUtil： Wo2M}]0
h[lh01z
package org.rut.util.algorithm; N86Hn]#
lq%s/l
import org.rut.util.algorithm.support.BubbleSort; #[i({1`^L
import org.rut.util.algorithm.support.HeapSort; u;Z~Px4]v
import org.rut.util.algorithm.support.ImprovedMergeSort; *sw$OnVb
import org.rut.util.algorithm.support.ImprovedQuickSort; >G-D& A+
import org.rut.util.algorithm.support.InsertSort; h,#AY[Q
import org.rut.util.algorithm.support.MergeSort; ,YiBu^E9
import org.rut.util.algorithm.support.QuickSort; U#Z}a d?VX
import org.rut.util.algorithm.support.SelectionSort; leyX: +
import org.rut.util.algorithm.support.ShellSort; &j>`H:
G4=v2_]
/** 9^aMmN&6N2
* @author treeroot :_?>3c}L
* @since 2006-2-2 GJ((eAS)
* @version 1.0 bF}~9WEa
*/ `U;4O)`n
public class SortUtil { Nz]\%c/-
public final static int INSERT = 1; xUeLX`73
public final static int BUBBLE = 2; F-ijGGL#
public final static int SELECTION = 3; A!j&g(Z"Q
public final static int SHELL = 4; (^6SF>'
public final static int QUICK = 5; E8V,".!+E
public final static int IMPROVED_QUICK = 6; w-\GrxlbX
public final static int MERGE = 7; J@)6]d/,
public final static int IMPROVED_MERGE = 8; QGYmQ9m{kL
public final static int HEAP = 9; Wm"W@LPx5
Z-/ E$j
public static void sort(int[] data) { 43(+3$VM7
sort(data, IMPROVED_QUICK); N}^\$sVu_
} G,$jU9 f
private static String[] name={ 4K4?Q+?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ikofJl]9
}; z}pdcQl#
l9SbuT$U
private static Sort[] impl=new Sort[]{ hx:x5L>
new InsertSort(), ^c-1wV`/
new BubbleSort(), v4 c_UFEh<
new SelectionSort(), TYB^CVSZ
new ShellSort(), P [gqv3V
new QuickSort(), D+k5e=
new ImprovedQuickSort(), 3|@Ske1%Y
new MergeSort(), O-mP{
new ImprovedMergeSort(), @=@WRPGM*9
new HeapSort() ft$/-;
}; m+V'*[O{
O@EpRg1
public static String toString(int algorithm){ % +eZ U)N
return name[algorithm-1]; cl{;%4$9
} }b~ZpUL!
=m1B1St2
public static void sort(int[] data, int algorithm) { >-]Y%O;}
impl[algorithm-1].sort(data); y&SueU=
} \E0Uj>9+[
B'&%EW]
public static interface Sort { f4:gD*YT
public void sort(int[] data); /tV)8pEj
} PCD1I98
Pirc49c
public static void swap(int[] data, int i, int j) { a[t2TjB
int temp = data; ~KCOCtiD
data = data[j]; o,u-%
data[j] = temp; Q;`#ujxL
} CFn!P;.!
} 7]G3yt->