[JAVA]用Java实现的各种排序

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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; 0XBBA0tq
} E.zYi7YUKK
int i1=l; XZUB*P}]D
int i2=mid+1; d=xI
for(int cur=l;cur<=r;cur++){ ;L\!g%a
if(i1==mid+1) {Oc?C:aI=
data[cur]=temp[i2++]; T_5*iwI
else if(i2>r) ~#IWM+I
data[cur]=temp[i1++]; >uP{9kDm
else if(temp[i1] data[cur]=temp[i1++]; !.tL"U~4
else &"~,V6,q
data[cur]=temp[i2++]; .&* ({UM
} =DmPPl{
} vkNZ -`+I
n;S0fg
} L:k@BCQM
7>W+Uq
改进后的归并排序: 9}'l=b:Jms
O|^6UH
package org.rut.util.algorithm.support; 4X(1
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import org.rut.util.algorithm.SortUtil; _^ CQ*+F
z$8e6*
/** ZPxOds1m
* @author treeroot ;ZE<6;#3IP
* @since 2006-2-2 >ji}j~cH
* @version 1.0 $@ T6g
*/ )+Y\NO?O
public class ImprovedMergeSort implements SortUtil.Sort { gOES2 4$2
g#9*bF
private static final int THRESHOLD = 10; K\Y6 cj
fxtYo,;$
/* @'NaA SB
* (non-Javadoc) =oKPMmpCZ
* <Vr]2mw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lhIr]'?l
*/ Gr"2G,,VI
public void sort(int[] data) { wFoR,oXtL/
int[] temp=new int[data.length]; U#FJ8CD&u
mergeSort(data,temp,0,data.length-1); ShsP]$Yp
} fO^EMy\
1VPN#Q!
private void mergeSort(int[] data, int[] temp, int l, int r) { >FEQtD~F
int i, j, k; u}@%70A
int mid = (l + r) / 2; -V<=`e
if (l == r) dTU.XgX)1^
return; 4o)\DB?!
if ((mid - l) >= THRESHOLD) ?G%, k LJJ
mergeSort(data, temp, l, mid); E%J7jA4
else Do[ F+Y
insertSort(data, l, mid - l + 1); %8`1Li6g
if ((r - mid) > THRESHOLD) 0F;(_2V-
mergeSort(data, temp, mid + 1, r); 7:R{~|R
else /="D]K)%b8
insertSort(data, mid + 1, r - mid); ^JF_;~C
sP8-gkkor
for (i = l; i <= mid; i++) { "#eNFCo7k
temp = data; =-1^K
} 5sV/N] !
for (j = 1; j <= r - mid; j++) { 6Kv}2M')+
temp[r - j + 1] = data[j + mid]; ?`[ uh%
} o`y*yucHI
int a = temp[l]; >FMT#x t
int b = temp[r]; TF}4X;3Dsy
for (i = l, j = r, k = l; k <= r; k++) { \ /X!tlwxh
if (a < b) { WHD/s
data[k] = temp[i++]; :xUl+(+
a = temp; iYfLo">
} else { {$QF*j
data[k] = temp[j--]; {dSU \':
b = temp[j]; iR}i42Cu
} S;AnpiBM8
} &0<R:K?>N
} 7yCx !P;
9|kEq>d
/** p6eDd"Y
* @param data Ll E_{||h
* @param l G~$M"@Q7N
* @param i li'1RKr
*/ 0.+Z;j
private void insertSort(int[] data, int start, int len) { g9r5t';
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W0?Y%Da(4m
} 51(`wo>LS
} d=5}^v#4
} WUOPYYW<o
} $P}]|/Yb
F*jjcUk
堆排序： t%YX-@
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package org.rut.util.algorithm.support; Qmc;s{-r;
.Mft+,"
import org.rut.util.algorithm.SortUtil; `\u),$
[{!j9E?(
/** z1KC$~{O
* @author treeroot u{lDof>
* @since 2006-2-2 /*p?UW<*4
* @version 1.0 6Bq2?;5
*/ Qc =lf$
public class HeapSort implements SortUtil.Sort{ 8!fAv$g0
hu*>B
/* (non-Javadoc) %IH|zSr)EM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9oau_Q#
*/ )1yUV*6
public void sort(int[] data) { ujHzG}2z
MaxHeap h=new MaxHeap(); 'FA)LuAok
h.init(data); TboHP/
for(int i=0;i h.remove(); L!Zxc~
System.arraycopy(h.queue,1,data,0,data.length); NVh>Q>B$_
} 2,QApW_Y
'N,NG$G2
private static class MaxHeap{ 6Oqnb+
D30Z9_^%:
void init(int[] data){ mM^8YL
this.queue=new int[data.length+1]; T+`GOFx
for(int i=0;i queue[++size]=data; ppo$&W &z
fixUp(size); H=SMDj)s+
} :x5o3xE
} Pv$"DEXA2
bFdg'_
private int size=0; d~bH!P
mbG^fy'
private int[] queue; WF.$gBH"
8_,wOkk_B
public int get() { d.(]V2X.J
return queue[1]; jE5 9h
} ^0?cyv\>LA
)^2jsy -/
public void remove() { QR"O)lP
SortUtil.swap(queue,1,size--); n_NG~/x
fixDown(1); )^@V*$D
} %Bun@
file://fixdown VqT[ca\
private void fixDown(int k) { 52R.L9Ai
int j; RuEnr7gi
while ((j = k << 1) <= size) { *wZV*)}
if (j < size %26amp;%26amp; queue[j] j++; -EIMh^
if (queue[k]>queue[j]) file://不用交换 hnLgsz
break; 7}7C0mV3
SortUtil.swap(queue,j,k); BCDf9]X
k = j; ]qG5Ne_
} n~cm?"
} 8i$`oMv[y
private void fixUp(int k) { #:5g`Ch4,
while (k > 1) { 0_Z|y/I.
int j = k >> 1; Jy[8,X
if (queue[j]>queue[k]) aZ0iwMK
break; 8}b[Q/h!
SortUtil.swap(queue,j,k); cx%9UK*c
k = j; -r0\
} 3\~fe/z'I
} 3T^dgWXEG
wbKBwI5w
} ~l(tl[
B9Tztg
} \B+SzW
`fh_8%m]*
SortUtil： gM[ J'DMW
g5N<B+?!i
package org.rut.util.algorithm; (w
5Kxk9{\8
import org.rut.util.algorithm.support.BubbleSort; siZ_JJW
import org.rut.util.algorithm.support.HeapSort; L. ?dI82c
import org.rut.util.algorithm.support.ImprovedMergeSort; gx R|S
import org.rut.util.algorithm.support.ImprovedQuickSort; W 9MZ
import org.rut.util.algorithm.support.InsertSort; m&c(N
import org.rut.util.algorithm.support.MergeSort; Olh-(u:9+O
import org.rut.util.algorithm.support.QuickSort; mK&9p{4#U
import org.rut.util.algorithm.support.SelectionSort; l'8wPmy%N
import org.rut.util.algorithm.support.ShellSort; i_^NbC
I`>%2mP[C
/** D??/=`|8
* @author treeroot dp W%LXM_
* @since 2006-2-2 UC$+&&rO
* @version 1.0 q)y8Bv|
*/ ]KT,s].
public class SortUtil { [:'?}p
public final static int INSERT = 1; \`5u@Nzx
public final static int BUBBLE = 2; ,B>b9,~3a
public final static int SELECTION = 3; euC,]n.
public final static int SHELL = 4; ee[NZz
public final static int QUICK = 5; Pt;Ahmi
public final static int IMPROVED_QUICK = 6; RIx6& 7$
public final static int MERGE = 7; iFchD\E*o
public final static int IMPROVED_MERGE = 8; UHHKI)(
public final static int HEAP = 9; .[s82c]]6
hvZR4|k>
public static void sort(int[] data) { CUcjJ|MZ
sort(data, IMPROVED_QUICK); mQuaO# I,
} Qn&^.e9I
private static String[] name={ z3LPR:&Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C^O^Jj5X%
}; K<(sqH
1<e%)? G
private static Sort[] impl=new Sort[]{ >7Q7H#~w
new InsertSort(), %*}f<k{6
new BubbleSort(), <7) 6*u
new SelectionSort(), Lxrn#Z eM
new ShellSort(), 2 -8:qmP(
new QuickSort(), 8 z7,W3b
new ImprovedQuickSort(), P#oV ^
new MergeSort(), {Oszq(A
new ImprovedMergeSort(), >:|q J$J.
new HeapSort() nP5fh_/
}; 1OS3Gv8jc~
POs~xaZ`H
public static String toString(int algorithm){ %W@IB8]Vr
return name[algorithm-1]; ( "z;Q?(
} g+*[CKO{
fdW={}~
public static void sort(int[] data, int algorithm) { bd}SB-D
impl[algorithm-1].sort(data); ?QVI'R:Z?
} -2d&Aq4m)
;Nij*-U4~
public static interface Sort { I/|n ma/ $
public void sort(int[] data); }Cf[nGh|B
} L<`g}iw
9x,+G['Zt
public static void swap(int[] data, int i, int j) { )5x?Qn(B
int temp = data; Fowh3go
data = data[j]; A[a+,TN{
data[j] = temp; P://Zi6>
} S45_-aE
} ,BAF?}04=