[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; G3${\'<
} hF`Qs
int i1=l; K'U8ft*_
int i2=mid+1; 2}0S%R(
for(int cur=l;cur<=r;cur++){ /vNHb_-
if(i1==mid+1) ' o(7@
data[cur]=temp[i2++]; 2#)z%K6T
else if(i2>r) ioJ|-@!#o
data[cur]=temp[i1++]; #,CK;h9jy!
else if(temp[i1] data[cur]=temp[i1++]; V)jF]u~g
else E'+?7ZGWj
data[cur]=temp[i2++]; Zonr/sA~
} IutU~%wv
} @XQItc<
mRT$@xa]J
} ^{g('BQx
"Ta"5XW
改进后的归并排序: iCIU'yI
Ye]-RN/W
package org.rut.util.algorithm.support; [yx8?5
%_. fEFy07
import org.rut.util.algorithm.SortUtil; \'.|7{Xu
s6(bTO.
/** `G "&IQ8.
* @author treeroot H>Q X?>j
* @since 2006-2-2 75W@B}dZd
* @version 1.0 r^T+I3
*/ CfEACH4_
public class ImprovedMergeSort implements SortUtil.Sort { '7JM/AcC#K
-)9aY.
private static final int THRESHOLD = 10; 0mR^%+~
cP^c}e*;NS
/* w,1&s};g\
* (non-Javadoc) .f-s+J&ED
* }9~U5UXWU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c1ptN
*/ L "5;<
public void sort(int[] data) { M,dp;
int[] temp=new int[data.length]; g=e~YM85
mergeSort(data,temp,0,data.length-1); =^mBj?(V7
} h@jk3J9^
@n^2UJ
private void mergeSort(int[] data, int[] temp, int l, int r) { tQ,3nI!|xF
int i, j, k; gt\*9P
int mid = (l + r) / 2; tvcM< e20
if (l == r) D]?yGI_
return; F*p@hl
if ((mid - l) >= THRESHOLD) 1eOQ;#OV
mergeSort(data, temp, l, mid); )-^[;:B\k"
else W%@0Ym`7
insertSort(data, l, mid - l + 1); )St`}qu;
if ((r - mid) > THRESHOLD) *:"p*qV*
mergeSort(data, temp, mid + 1, r); 4uE|$
else iC4rzgq
insertSort(data, mid + 1, r - mid); 0aa&13!5
ImsyyeY]
for (i = l; i <= mid; i++) { ypWhH
temp = data; -\~HAnh
} ~;vt{pk
for (j = 1; j <= r - mid; j++) { IVso/!
temp[r - j + 1] = data[j + mid]; md;jj^8zj
} Bk@&k}0
int a = temp[l]; Np@RK1}
int b = temp[r]; ]ASTw(4
for (i = l, j = r, k = l; k <= r; k++) { ?U3~rro!
if (a < b) { ]iry'eljy
data[k] = temp[i++]; e]@ B61lc
a = temp; ^_t7{z%sA[
} else { jIjW +D`
data[k] = temp[j--]; +[7 DRT:
b = temp[j]; K>_~|ZN1C8
} TJUYd9O4[
} PQXCT|iJ
} +6s6QeNS8
]23+ d/
/** ZVDi;
* @param data & Tkl-{I
* @param l u-R;rf5%k
* @param i 1AQ3<
*/ I]Ws
private void insertSort(int[] data, int start, int len) { 'o|=_0-7W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (p(-E
} :czUOZ_
} "c*#ZP
} 0}9
} #Yx /ubg6
c/}-pZn<
堆排序： nU/x,W[}
rw%OA4>
package org.rut.util.algorithm.support; LCMn9I
p4@0Dz`Q
import org.rut.util.algorithm.SortUtil; ;CDa*(e
~ep^S^V+
/** t: 03
* @author treeroot ,'byJlw_pv
* @since 2006-2-2 zcOG[-
* @version 1.0 q OV$4[r
*/ VLC=>w\,
public class HeapSort implements SortUtil.Sort{ 22R ,
rTzXRMv@o
/* (non-Javadoc) QeQxz1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z'}z4^35,
*/ @+hO,WXN
public void sort(int[] data) { b&!x.+d-z
MaxHeap h=new MaxHeap(); 9>ML;$T&
h.init(data); P.3kcZ
for(int i=0;i h.remove(); |`O210B@
System.arraycopy(h.queue,1,data,0,data.length); EO\- J-nM
} & sgzSX
QJ,~K&?
private static class MaxHeap{ U]"6KS
t:%u4\nZ;
void init(int[] data){ dC?l%,W
this.queue=new int[data.length+1]; 9PG3cCr?
for(int i=0;i queue[++size]=data; (t"e#b(:
fixUp(size); f<vZ4 IU
} /gP"X1.
} UVD*GsBk
6t'vzcQs
private int size=0; ; Z2
;eC8| Xz
private int[] queue; ,EH^3ODD
/U=?D(>x
public int get() { &X)^G#
return queue[1]; <AB({(
} 5 ~YaXh^
HjT-5>I7f
public void remove() { iz2;xa*
SortUtil.swap(queue,1,size--); 9n;6;K#
fixDown(1); v K!vA-7
} \xX'SB#.l
file://fixdown )| F O>
private void fixDown(int k) { A[H"(E#k
int j; @VnK/5opS
while ((j = k << 1) <= size) { rhC x&L
if (j < size %26amp;%26amp; queue[j] j++; 2[1lwV
if (queue[k]>queue[j]) file://不用交换 7*@BCu6
break; H'jo3d~+
SortUtil.swap(queue,j,k); F+9(*|x%
k = j; j5m]zh5\J=
} ye`-U?7.
} 'e8O \FOf
private void fixUp(int k) { u(g9-O
while (k > 1) { EO"G(v
int j = k >> 1; (#rhD}
if (queue[j]>queue[k]) U?j[ 8z
break; c Sktm&SP
SortUtil.swap(queue,j,k); 5 &s<&h
k = j; *_eY +\j
} XyD*V;.E
} {=,+;/0
R@2*Lgxz~
} P=.T|l1
^TAf+C^Ry
} gqDSHFm:
ZQ[s/
SortUtil： /H*n(d
-qpe;=g&f
package org.rut.util.algorithm; #{zF~/Qq
T26'b .
import org.rut.util.algorithm.support.BubbleSort; GhW{6.^
import org.rut.util.algorithm.support.HeapSort; K&up1nZ@(
import org.rut.util.algorithm.support.ImprovedMergeSort; h%!,|[|
import org.rut.util.algorithm.support.ImprovedQuickSort; ~/;shs<9EM
import org.rut.util.algorithm.support.InsertSort; `Lr|KuFN
import org.rut.util.algorithm.support.MergeSort; @O HsM?nW
import org.rut.util.algorithm.support.QuickSort; Gy!bPVe
import org.rut.util.algorithm.support.SelectionSort; h/7_IuD
import org.rut.util.algorithm.support.ShellSort; a4eE/1
) -@Dh6F
/** #g]eDU-[
* @author treeroot hv)d
* @since 2006-2-2 mf\@vI
* @version 1.0 ZC9S0Z
*/ CFG(4IMx
public class SortUtil { tTPjCl
public final static int INSERT = 1; 0|FQIhVuY
public final static int BUBBLE = 2; ,m;G:3}48
public final static int SELECTION = 3; E*83N@i
public final static int SHELL = 4; m>+e;5
public final static int QUICK = 5; /}=cv>S5V
public final static int IMPROVED_QUICK = 6; EkEQFd 5g
public final static int MERGE = 7; >7 qZ\#
public final static int IMPROVED_MERGE = 8; p&ZLd`[
public final static int HEAP = 9; S=X_7V
yOyuMZo6
public static void sort(int[] data) { Y|aaZ|+
sort(data, IMPROVED_QUICK); VX e7b
} % r0AhWv
private static String[] name={ Hf9F:yH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zJG=9C?
}; 5>&C.+A 9
^']*UD;
private static Sort[] impl=new Sort[]{ td|O#R
new InsertSort(), XO}v8nWV
new BubbleSort(), w s7LDY&(
new SelectionSort(), w>&g'
new ShellSort(), RNb"O{3
new QuickSort(), PRN%4G
new ImprovedQuickSort(), e# KP3Lp
new MergeSort(), :jGgX>GG
new ImprovedMergeSort(), TTz_w-68
new HeapSort() ;%4N@Z
}; %^bN^Sq -
y@\J7 h:
public static String toString(int algorithm){ `,)%<}
return name[algorithm-1]; 9~}.f1z
} 6<9gVh<=w
xd^9R<
public static void sort(int[] data, int algorithm) { og|~:>FmJo
impl[algorithm-1].sort(data); D*!9K8<o
} "K#zY~>L
w'<"5F`
public static interface Sort { iTJE:[W"y
public void sort(int[] data); h2vD*W
} D@yu2}F{IY
!k8j8v&
public static void swap(int[] data, int i, int j) { )%~<EJ*&Z
int temp = data; R<e ~Cb-
data = data[j]; U$j?2|v-x
data[j] = temp; Dh .<&ri
} $Zf]1?|xa
} )"f*Mp