[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; ibAA:I,d
} d{trO;%#f
int i1=l; dog,vUu
int i2=mid+1; 7,4x7!
for(int cur=l;cur<=r;cur++){ & vIKNGJ^
if(i1==mid+1) a,E;R$[!
data[cur]=temp[i2++]; Sh*P^i.]+
else if(i2>r) ^\6UTnS.
data[cur]=temp[i1++]; o{hKt?
else if(temp[i1] data[cur]=temp[i1++]; i:$g1
else ;8v5 qz
data[cur]=temp[i2++]; ( 0h]<7
} $+);!?^|:
} >@%!r
|S8pq4eKJ_
} C,]Ec2
GGuLxc?(
改进后的归并排序: z?aDOh
@gj5'
package org.rut.util.algorithm.support; Rta P+6'X
p~b$+8#+
import org.rut.util.algorithm.SortUtil; w '"7~uN
Mzd}9x$'J
/** :W&\})
* @author treeroot {h=Ai[|l4Q
* @since 2006-2-2 pZjFpd|
* @version 1.0 [~o3S$C&7
*/ Q4PXC$u
public class ImprovedMergeSort implements SortUtil.Sort { KJ~pY<a?
<>Im$N ai
private static final int THRESHOLD = 10; ,rdM{ r
G~]BC#nB_
/* $d=lDN
* (non-Javadoc) zW _'sC
* 5 9vGLN!L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;@ e|}Gk
*/ 0#7dm9
public void sort(int[] data) { ex1ecPpN
int[] temp=new int[data.length]; L}mhMxOTi
mergeSort(data,temp,0,data.length-1); x9e 9$ww}
} vKC>t95
ivq4/Y]-X
private void mergeSort(int[] data, int[] temp, int l, int r) { %'HUC>ChN
int i, j, k; @RP|?Xc{?
int mid = (l + r) / 2; J\*d4I<(Rt
if (l == r) |H4'*NP"
return; }VGiT~2$
if ((mid - l) >= THRESHOLD) R[c_L=
mergeSort(data, temp, l, mid); ;gyE5n-{
else %([c4el>\F
insertSort(data, l, mid - l + 1); |(<L!6
if ((r - mid) > THRESHOLD) WToAT;d2h
mergeSort(data, temp, mid + 1, r); ]*|K8&jxl
else ||4Dtg K
insertSort(data, mid + 1, r - mid); j$^]WRt
5ZVTI,4K
for (i = l; i <= mid; i++) { k.ZfjX"
temp = data; -{h[W bf
} C0%%@ 2+
for (j = 1; j <= r - mid; j++) { ?2TH("hV$
temp[r - j + 1] = data[j + mid]; Z7^}G=*
} #O WSy'Qnt
int a = temp[l]; [;I8ZVE
int b = temp[r]; [oj"Tn(
for (i = l, j = r, k = l; k <= r; k++) { SXEiyy[7v
if (a < b) { ht|r+v-
data[k] = temp[i++]; >`:+d'Jv0
a = temp; 66*o2D\Q*G
} else { {E/TC%
data[k] = temp[j--]; kXr%73s
b = temp[j]; GpL#,qYc
} E@FenCF
} Xd6y7s
} 0 *\=Q$Yy
@2gMtf?<
/** K5SO($
* @param data YSgF'qq\
* @param l )VT/kIq-U
* @param i l+6(|"md
*/ 0pFHE>
private void insertSort(int[] data, int start, int len) { +mQSlEo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pQNFH)=nw
} o__q)"^~-
} L ~w=O!
} 6{'6_4;Fv(
} ^|C|=q~:
F0Hbklr
堆排序： &[kgrRF@HU
,k!a3"4+TJ
package org.rut.util.algorithm.support; o3=kF
u$#7W>R
import org.rut.util.algorithm.SortUtil; 1RA$hW@}
)^TQedF
/** +QX>:z
* @author treeroot y~7lug
* @since 2006-2-2 TpgBS4q
* @version 1.0 &pm{7nH
*/ `qTY
public class HeapSort implements SortUtil.Sort{ >9`ep7
iC]lO
/* (non-Javadoc) w>uZ$/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >{a,]q*
*/ p( *3U[1
public void sort(int[] data) { Q8?D}h
MaxHeap h=new MaxHeap(); y6}):|
h.init(data); SK52.xXJ
for(int i=0;i h.remove(); 4Z}{hc\J
System.arraycopy(h.queue,1,data,0,data.length); F/sBr7I
} lIg2iun[n
#Uh5tc
private static class MaxHeap{ "ux]kfoT
AvZ)1(
void init(int[] data){ Wg^cj:&`u
this.queue=new int[data.length+1]; )/"7$2Aoy
for(int i=0;i queue[++size]=data; p'~5[JR:
fixUp(size); 31& .Lnq
} u9w&q^0dqG
} Kdu\`c-lB
,rQ)TT
private int size=0; x-&v|w'
2p>SB/
private int[] queue; Y)}%SP>,
Yj6p19
public int get() { "Q{~Bj~
return queue[1]; 4/?}xD|?
} &Fjilx'k
~uadivli
public void remove() { S7{.liHf
SortUtil.swap(queue,1,size--); % VpBB
fixDown(1); nM-SDVFM
} DWQQ615i
file://fixdown D^55:\4(
private void fixDown(int k) { W"(`n4hi3
int j; pm~;:#z7
while ((j = k << 1) <= size) { N+qLxk
if (j < size %26amp;%26amp; queue[j] j++; Aq%^>YAp
if (queue[k]>queue[j]) file://不用交换 @T1+b"TC
break; Z&jb,eh2
SortUtil.swap(queue,j,k); ?VQLY=?
k = j; /;6@M=6u
} 0WE1}.J<
} ?7)(qnbe"
private void fixUp(int k) { 2Fgt)`{!
while (k > 1) { Wx$q:$h@q
int j = k >> 1; FJ8@b
if (queue[j]>queue[k]) BK9x`Oo2
break; '<< ~wt
SortUtil.swap(queue,j,k); 2,V+?'^j
k = j; PMhhPw]
} 1Dp@n
} _G #"B{7
'h>5&=r
} lc7a@qnw
bDBO+qA
} zL`uiZl
'QojSq
SortUtil： (0#F]""\e
=4<S8Cp
package org.rut.util.algorithm; X|E+K
;c Co+(
import org.rut.util.algorithm.support.BubbleSort; aroVyUs3j
import org.rut.util.algorithm.support.HeapSort; YQV?S
import org.rut.util.algorithm.support.ImprovedMergeSort; W^.-C
import org.rut.util.algorithm.support.ImprovedQuickSort; ^7bf8 ^`
import org.rut.util.algorithm.support.InsertSort; )nHE$gVM s
import org.rut.util.algorithm.support.MergeSort; Wk#h,p3
import org.rut.util.algorithm.support.QuickSort; E8_Le
import org.rut.util.algorithm.support.SelectionSort; R{uJczu
import org.rut.util.algorithm.support.ShellSort; ttFY _F~S
q%k(M[
/** a`b zFu{
* @author treeroot RE $3| z
* @since 2006-2-2 |W*@}D
* @version 1.0 D`:d'ow~KQ
*/ uO@3vY',n
public class SortUtil { D&l,SD
public final static int INSERT = 1; UlNfI}#X
public final static int BUBBLE = 2; 7k=F6k0)
public final static int SELECTION = 3; B$TChc3B
public final static int SHELL = 4; @ Rx6 >52>
public final static int QUICK = 5; |4S?>e
public final static int IMPROVED_QUICK = 6; !Nl.Vb
public final static int MERGE = 7; M*|VLOo=v
public final static int IMPROVED_MERGE = 8; }"?nU4q;S
public final static int HEAP = 9; )w2K&Zr0
J4v0O="
public static void sort(int[] data) { ct}%Mdg
sort(data, IMPROVED_QUICK); qJ+52U|z
} W.`Xm(y
private static String[] name={ Zfy~mv$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zf3:<CRX5
}; yvd `nV
T3 9C lH
private static Sort[] impl=new Sort[]{ y(nsyA
new InsertSort(), VP%i1|XZJ
new BubbleSort(), poQdI?ed,
new SelectionSort(), z{pC7e5
new ShellSort(), /X^3=-{8
new QuickSort(), yw.~trF&%
new ImprovedQuickSort(), g6VD_
new MergeSort(), ?QMclzh*-
new ImprovedMergeSort(), }#OqU# q|
new HeapSort() o"#TZB+k
}; ;EJPrDHTk
inPE/Ux
public static String toString(int algorithm){ wD6!#t k
return name[algorithm-1]; P}hY{y'
} UOWIiu
:'y{dbKp"
public static void sort(int[] data, int algorithm) { <r<Dmn|\a
impl[algorithm-1].sort(data); j!x<QNNX
} FE+7X=y
J0Hm)*
public static interface Sort { VX;zZ`BJ
public void sort(int[] data); ) \-96 xd
} B6ed,($&
g=xv+e
public static void swap(int[] data, int i, int j) { au~]
int temp = data; 9p2>`L
data = data[j]; 6Lg!Lodu
data[j] = temp; Any Zi'
} ]l=O%Ev
} F_nZvv[H?