[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; OvT[JpV
} +A8q.-N G
int i1=l; t|'%0 W
int i2=mid+1; 4}DFCF%B
for(int cur=l;cur<=r;cur++){ 6qDt6uB
if(i1==mid+1) [lML^CYQ
data[cur]=temp[i2++]; 9~`#aQG T
else if(i2>r) bK6^<,~
data[cur]=temp[i1++]; 8a*&,W
else if(temp[i1] data[cur]=temp[i1++]; [[c0g6
else 'nPI zK<v
data[cur]=temp[i2++]; K W&muD
} JRC2+BU /
} lt-3OcC
*=oO3c0|b,
} t#(=$
$B?8\>_?
改进后的归并排序: ]*=!lfrV
KH)-=IJ8
package org.rut.util.algorithm.support; ?ja%*0 R
o*A, 6y
import org.rut.util.algorithm.SortUtil; U+'zz#0qN
0&)6mO
/** Njg87tKB
* @author treeroot K/B$1+O
* @since 2006-2-2 [_%u5sc-y
* @version 1.0 X~&8^?
*/ Vj4 h#NN$
public class ImprovedMergeSort implements SortUtil.Sort { 564L.^$@|
/>E ILPPb
private static final int THRESHOLD = 10; !4Zy$69R
_w\i~To!
/* *Zg=cI@)(
* (non-Javadoc) m19\H
* c/88|k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JYj*.Q0
*/ e1XKlgl
public void sort(int[] data) { tXA?[ S
int[] temp=new int[data.length]; 6IRRRtO(
mergeSort(data,temp,0,data.length-1); p#qla'
} MS#"TG/)
%Qz<Lk">.
private void mergeSort(int[] data, int[] temp, int l, int r) { "7EK{6&jQ
int i, j, k; ^U,iDK_
int mid = (l + r) / 2; @8{8|P
if (l == r) ]h1.1@>xc
return; :%9R&p:'ar
if ((mid - l) >= THRESHOLD) P7W|e~]Yq
mergeSort(data, temp, l, mid); rD21:1s
else '^m'r+B"
insertSort(data, l, mid - l + 1); ,{G\-(\
if ((r - mid) > THRESHOLD) <gi~:%T
mergeSort(data, temp, mid + 1, r); _R(ZvsOZ
else .lj5pmD
insertSort(data, mid + 1, r - mid); Zgh~7Z/
" 4#&tNQ
for (i = l; i <= mid; i++) { .n+ ;&5
temp = data; w=?nD6Xhz
} kwaZn~
for (j = 1; j <= r - mid; j++) { 3|w$gG;Y
temp[r - j + 1] = data[j + mid]; Z[VrRT,\c
} 0xDn!
int a = temp[l]; I}u\ov_Su
int b = temp[r]; 0`.&U^dG
for (i = l, j = r, k = l; k <= r; k++) { /-!Fr:Ox>
if (a < b) { O)V;na
data[k] = temp[i++]; &8f/6dq
a = temp; h-"q <eY"
} else { *=B<S/0
data[k] = temp[j--]; 8F<|.V;
b = temp[j]; e8f7*S8
} /"="y'Wx
} %S"z9@
} 075IW"p'
Q3& ?28
/** H(K!{k
* @param data %CnVK1u!
* @param l Ga9iPv
* @param i `D=OEc
*/ x1`w{5;C 2
private void insertSort(int[] data, int start, int len) { }~&0<8m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [mwqCW&
} CR.d3!&28
} 3/usgw1
} ~]no7O4
} ^W=hs9a+F
/L2ZI1v
堆排序： {q$U\y%Rq
w5y.kc;
package org.rut.util.algorithm.support; e8):'Cb
J V}7c$_
import org.rut.util.algorithm.SortUtil; `qd5+~c
:j3^p8]
/** jTqJ(M}L
* @author treeroot ^m D$#
* @since 2006-2-2 b(mZ/2,B
* @version 1.0 < ~CY?
*/ 4J`-&05O
public class HeapSort implements SortUtil.Sort{ K)x6F15r
nm\f$K>Pg
/* (non-Javadoc) % +
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ueU"v'h\
*/ f%_$RdU
public void sort(int[] data) { Z%ZOAu&p
MaxHeap h=new MaxHeap(); )CoFRqz<h
h.init(data); um]N]cCD`
for(int i=0;i h.remove(); nTsV>lQY,
System.arraycopy(h.queue,1,data,0,data.length); WxD$k3U
} `0W"[BY
ER-Xd9R
private static class MaxHeap{ ":T"Y;
MY\mo,#
void init(int[] data){ aBQ--Sz
this.queue=new int[data.length+1]; &<#1G u_
for(int i=0;i queue[++size]=data; ,0HID:&
fixUp(size); jX'pUO
} @|<nDd{2
} %vf;qVoA~
;j;U9-oh
private int size=0; WSeiW
M7Z&t'=
private int[] queue; &q4~WRnzJk
H/W&a2R^P
public int get() { .AX%6+o
return queue[1]; cuG;1,?b
} S+6YD0
y#Nrq9r:
public void remove() { S]T71W<i
SortUtil.swap(queue,1,size--); p}GTOJT}
fixDown(1); JSh'iYJ.
} H.n|zGQTB
file://fixdown GRL42xp'*D
private void fixDown(int k) { 6,CK1j+tZ
int j; Yx. t+a-
while ((j = k << 1) <= size) { #0*I|gfV
if (j < size %26amp;%26amp; queue[j] j++; n|=yw6aV'
if (queue[k]>queue[j]) file://不用交换 p8F$vx4,
break; V^.Z&7+E`_
SortUtil.swap(queue,j,k); 2&s(:=
k = j; T|oDJ]\J
} /YwwG;1
} Z^mIGy}
private void fixUp(int k) { %^I 7=
while (k > 1) { ,-$%>Uv
int j = k >> 1; P:'y}a-
if (queue[j]>queue[k]) <;b
break; 7~MWp4.
SortUtil.swap(queue,j,k); zhRF>Y`
k = j; |`wJ {-
} yYk?K<ou
} T8T,G4Q
H lFVc
} {![E)~
bDw\;bnG
} b1e)w?n
z}VCiS0
SortUtil： s5d[sx
odcrP\S
package org.rut.util.algorithm; 2qj0iRH#N<
0j#$Swa
import org.rut.util.algorithm.support.BubbleSort; L<<v
import org.rut.util.algorithm.support.HeapSort; N9Fu
import org.rut.util.algorithm.support.ImprovedMergeSort; HwMe^e;
import org.rut.util.algorithm.support.ImprovedQuickSort; |])Ko08*tE
import org.rut.util.algorithm.support.InsertSort; 7V\M)r{q7
import org.rut.util.algorithm.support.MergeSort; r_a1oO:
import org.rut.util.algorithm.support.QuickSort; \gZjq]3
import org.rut.util.algorithm.support.SelectionSort; $U_1e'
import org.rut.util.algorithm.support.ShellSort; ,qgR+]?({
7BA9zs392
/** h7]>b'H
* @author treeroot 5FNf)F
* @since 2006-2-2 k|_ >I
* @version 1.0 mxvV~X%
*/ a5g1.6hF
public class SortUtil { 79lG~BGE
public final static int INSERT = 1; ol4!#4Y&{
public final static int BUBBLE = 2; exm*p/
public final static int SELECTION = 3; BS3BJwf; f
public final static int SHELL = 4; T:j!a{_|
public final static int QUICK = 5; ybm&g( -\
public final static int IMPROVED_QUICK = 6; n lvDMZ
public final static int MERGE = 7; TU8K\;l]
public final static int IMPROVED_MERGE = 8; `p^xdj}
public final static int HEAP = 9; `jFvG\aC
yF&?gPh&
public static void sort(int[] data) { K)8 m?sf/
sort(data, IMPROVED_QUICK); v[y|E;B
} E"H>[E
private static String[] name={ ;{>-K8=>$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b WZX
}; vC5 (
e-{4qt
private static Sort[] impl=new Sort[]{ Q#$dp
new InsertSort(), T^ah'WmNw
new BubbleSort(), ZZ;V5o6E
new SelectionSort(), o|a]Q
new ShellSort(), n)teX.ck)
new QuickSort(), A832z`
new ImprovedQuickSort(), K* 0]*am|v
new MergeSort(), m4T`Tg#P
new ImprovedMergeSort(), nr9cG/"
new HeapSort() k{$Mlt?&-
}; 6sRKbp|r7
h<2O+"^
public static String toString(int algorithm){ <~qhy{hRn
return name[algorithm-1]; 9_S>G$9D
} |a Ht6F
Wr;?t!
public static void sort(int[] data, int algorithm) { !;C *Wsp}
impl[algorithm-1].sort(data); 2KmPZ&r
} o[eIwGxZ
d`+cNKf
public static interface Sort { >*mLbp"
public void sort(int[] data); bPdbKi{j@
} ut^^,w{o>
ViT$]Nv
public static void swap(int[] data, int i, int j) { =G2A Ufn
int temp = data; QI2T G,
data = data[j]; Bx&wS|-)D
data[j] = temp; $lrq*Nf9c
} HPR*:t
} jG3i )ALx