[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; |\t-g"~sN
} 7~p@0)''
int i1=l; b<ZIWfs
int i2=mid+1; XS{Qnx_#
for(int cur=l;cur<=r;cur++){ '<xXK@=KEI
if(i1==mid+1) "ycJ:Xv49
data[cur]=temp[i2++]; P%VSAh\|n
else if(i2>r) ({)+3]x
data[cur]=temp[i1++]; mb3"U"ohs
else if(temp[i1] data[cur]=temp[i1++]; 4Uo&d#o)C-
else W:nef<WH
data[cur]=temp[i2++]; On.{!:"I/
} rJTa
} q5+4S5R*^
$dC?Tl|B0
} M `M5'f
(@VMH !3
改进后的归并排序: LEf^cM=>
D%SlAzZ3
package org.rut.util.algorithm.support; X-Kh(Z
2(+2+}
import org.rut.util.algorithm.SortUtil; q`a'gJx#y
1#2 I
/** MUc$j&
* @author treeroot @ioJ]$o7
* @since 2006-2-2 [5b--O
* @version 1.0 a0E)2vt4
*/ j0aXyLNX
public class ImprovedMergeSort implements SortUtil.Sort { KqJs?Won
50wulGJud
private static final int THRESHOLD = 10; 9>/4W.
iC~^)-~H=w
/* 9T9!kb
* (non-Javadoc) _Y4` xv0/
* Y=I'czg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =v&hWjP
*/ >Q;l(fdj
public void sort(int[] data) { n'LrQU
int[] temp=new int[data.length]; [yQt^!;
mergeSort(data,temp,0,data.length-1); _8J.fT$${
} $GcqBg-Hi
aFm_;\
private void mergeSort(int[] data, int[] temp, int l, int r) { &`r-.&Y
int i, j, k; LA5(sp@O
int mid = (l + r) / 2; 0i>5<ej,f
if (l == r) k%#EEMh
return; "Gzz4D
if ((mid - l) >= THRESHOLD) lgy<?LI\
mergeSort(data, temp, l, mid); @Uvz8*b6
else tSUEZ62EY
insertSort(data, l, mid - l + 1); 5Ln,{vsv
if ((r - mid) > THRESHOLD) G~[x 3L'
mergeSort(data, temp, mid + 1, r); 1n8/r}q'H
else &wawr2)}
insertSort(data, mid + 1, r - mid); Q"d^_z]K
Bm<`n;m
for (i = l; i <= mid; i++) { ltSU fI
temp = data; /C:gKy4
} o5PO=AN
for (j = 1; j <= r - mid; j++) { 9Q.Yl&A
temp[r - j + 1] = data[j + mid]; vn8aFA
} my1@41 H
int a = temp[l]; l|[N42+
int b = temp[r]; *:7rdzn
for (i = l, j = r, k = l; k <= r; k++) { cqkV9f8Ro
if (a < b) { V2EUW!gn 2
data[k] = temp[i++]; !9e=_mY
a = temp; >uRI'24
} else { 'JE`(xD
data[k] = temp[j--]; V=l0(03j~
b = temp[j]; V1zmGy
} Gb6'n$g
} _N cR)2
} u&vf+6=9Dd
khxnlry
/** +\]\[6
* @param data jB2[(
* @param l <'Eme
* @param i g:@#@1rB6
*/ _|2:_N=
private void insertSort(int[] data, int start, int len) { <xm7qmqI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %wy.TN
} h;"4+uw
} ?l{nk5,?-Y
} C{rcs'
} 2F.;;Ab
ADzhNfS
堆排序： 'IQ0{&EI
]%H`_8<gc
package org.rut.util.algorithm.support; >tr}|>
cuITY^6
import org.rut.util.algorithm.SortUtil; K69'6?#
/,yd+wcW#
/** mq.`X:e
* @author treeroot kDioD
* @since 2006-2-2 bAqA1y3=
* @version 1.0 .L~AL|2_
*/ (w3YvG.
public class HeapSort implements SortUtil.Sort{ X+9>A.92
ZLejcYS
/* (non-Javadoc) Qw*|qGvy^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f$$/H>MJ
*/ "KpGlY?^
public void sort(int[] data) { Wac&b
MaxHeap h=new MaxHeap(); XpHrt XD
h.init(data); va@Lz&sAE%
for(int i=0;i h.remove(); wP@(?z
System.arraycopy(h.queue,1,data,0,data.length); kTgEd]^&D
} gwMNYMI
F$]Pk|,
private static class MaxHeap{ ZY+qA
;A*]l'[-
void init(int[] data){ oMa6(3T?E
this.queue=new int[data.length+1]; I\ob7X'Xu!
for(int i=0;i queue[++size]=data; lymCH
fixUp(size); NXrlk
} W${Ue#w77
} ^09,"<@k
&h/Xku&0
private int size=0; :"c*s4
TvbE2Q;/UL
private int[] queue; DvvK^+-~
ZFL~;_r
public int get() { )y$(AJx$
return queue[1]; 46h<,na?,
} qX{+oy5
li.;IWb0+)
public void remove() { " H\k`.j
SortUtil.swap(queue,1,size--); UCjld
fixDown(1); g($2Dk_F2
} ~]2K^bh8&
file://fixdown 5rik7a)Z]
private void fixDown(int k) { ?e 4/p
int j; }|=|s f
while ((j = k << 1) <= size) { rx|pOz,:
if (j < size %26amp;%26amp; queue[j] j++; 4V`G,W4^J
if (queue[k]>queue[j]) file://不用交换 9yP;@y*d
break; 'H;*W|:-]
SortUtil.swap(queue,j,k); iH@UTE;
k = j; L!xi
} x.$FNt(9
} <LiPEo.R
private void fixUp(int k) { #ABZ&Z
while (k > 1) { tR$NRMZ.
int j = k >> 1; i/Zd8+.n$
if (queue[j]>queue[k]) nu%*'.
break; wibNQ`4k
SortUtil.swap(queue,j,k); cvL;3jRo
k = j; s~X%Y<9l
} =I_'.b
} w}L[u r;I_
S f# R0SA
} 9->if/r,o
t?FBG4
} R:qW;n%AF
H Pz+Dm
SortUtil： (E1~H0^
|FRg\#kf%
package org.rut.util.algorithm; [nq@mc~<
v]UwJz3<
import org.rut.util.algorithm.support.BubbleSort; /)O"l@ }U
import org.rut.util.algorithm.support.HeapSort; ~k5W@`"W
import org.rut.util.algorithm.support.ImprovedMergeSort; JxU5 fe
import org.rut.util.algorithm.support.ImprovedQuickSort; Q7CsJzk~)
import org.rut.util.algorithm.support.InsertSort; Q"#J6@
import org.rut.util.algorithm.support.MergeSort; }jPSUdo
import org.rut.util.algorithm.support.QuickSort; X:{!n({r=
import org.rut.util.algorithm.support.SelectionSort; A04U /;
import org.rut.util.algorithm.support.ShellSort; q) KKvO
!&E-}}<
/** jPkn[W# 6
* @author treeroot 8z\xrY
* @since 2006-2-2 )4;`^]F
* @version 1.0 +=)+'q]S
*/ B9S@(/"7
public class SortUtil { lyhiFkO iH
public final static int INSERT = 1; A=0'Ks
public final static int BUBBLE = 2; Vxt+]5X
public final static int SELECTION = 3; (QB2T2x
public final static int SHELL = 4; MolgwVd
public final static int QUICK = 5; )+Pus~w
public final static int IMPROVED_QUICK = 6; BMf@M
public final static int MERGE = 7; [Ch.cE_
public final static int IMPROVED_MERGE = 8; 7G],T++N
public final static int HEAP = 9; X@FN|Rdh
_q^E,P
public static void sort(int[] data) { 5!9zI+S|=`
sort(data, IMPROVED_QUICK); ],].zlN
} /Z4et'Lo
private static String[] name={ <gBA1oRz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L}NSR
}; ySI!d|_
g9F?z2^
private static Sort[] impl=new Sort[]{ #`s"WnP9'!
new InsertSort(), poFg1
new BubbleSort(), i@J;G`
new SelectionSort(), 9gZ$
new ShellSort(), P!k{u^$L
new QuickSort(), )!T/3|C
new ImprovedQuickSort(), Xn ;AZu^'R
new MergeSort(), A+{VGP^
new ImprovedMergeSort(), (7*}-Uy[C
new HeapSort() 6W UrQFK
}; *8XEYZa
@KAI4LP
public static String toString(int algorithm){ !|>"o7
return name[algorithm-1]; 0m ? )ROaJ
} ~Cjn7
e>7i_4(C
public static void sort(int[] data, int algorithm) { 4KrL{Z+}
impl[algorithm-1].sort(data); yV(\R
} ?bu>r=oIO]
F6dP,(
public static interface Sort { :Ux_qB
public void sort(int[] data); ct}9i"H#1
} e(G|;a
A5w6]:f2
public static void swap(int[] data, int i, int j) { gZ1?G-Q
int temp = data; bN@ l?w
data = data[j]; Lj;2\]
data[j] = temp; <0?W{3NqI
} DlNX 3
} |^H5^k "Bv