[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; (K_{a+$[
} 5z&>NI
int i1=l; 6AdC
int i2=mid+1; ^J;rW3#N8
for(int cur=l;cur<=r;cur++){ C TKeY
if(i1==mid+1) ]iMqIh"
data[cur]=temp[i2++]; Z~].v._YV)
else if(i2>r) Zo,066'+[.
data[cur]=temp[i1++]; L{rd',
else if(temp[i1] data[cur]=temp[i1++]; W{c Z7$d
else h5(OjlMC
data[cur]=temp[i2++]; hr!'
} {[3xi`0-
} KP&xk13)
O7p=N8V
} q~^!Ck+#*
[{`2FR:Cd
改进后的归并排序: j^%N:BQ&
'50}QY_R.
package org.rut.util.algorithm.support; ,q;?zcC7
I1Otu~%d
import org.rut.util.algorithm.SortUtil; yfal'DqKF
*E]:VZl
/** SsPZva
* @author treeroot 9F[_xe@
* @since 2006-2-2 [X91nUz#
* @version 1.0 wh)F&@6 R!
*/ Nv^byWqu
public class ImprovedMergeSort implements SortUtil.Sort { Ra"hdxH
5YneoM]Q
private static final int THRESHOLD = 10; >7PNl\=gG
PW82 Vp.
/* Au6Y]
* (non-Javadoc) !6x7^E;c
* CW2)1%1iz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9VanR ::XX
*/ `ZbFky{
public void sort(int[] data) { 2$ &B@\WY
int[] temp=new int[data.length]; QIg'js$W
mergeSort(data,temp,0,data.length-1); C T\@>!'f
} ITg<u?z_
91]sO%3
private void mergeSort(int[] data, int[] temp, int l, int r) { k<5g
int i, j, k; >ZW|wpO
int mid = (l + r) / 2; Y2;2Exp^
if (l == r) T];dFv-GT
return; uuxVVgWp{
if ((mid - l) >= THRESHOLD) qXhdU/ =
mergeSort(data, temp, l, mid); \EsT1aT
else $ nHD,h
insertSort(data, l, mid - l + 1); bAbR0)
if ((r - mid) > THRESHOLD) lj UdsUw
mergeSort(data, temp, mid + 1, r); l&}}Io$?@
else #y[U2s Se
insertSort(data, mid + 1, r - mid); YM};85K
PfZS"yk
for (i = l; i <= mid; i++) { b\"w/'XX
temp = data; !LzA
} !sSq4K
for (j = 1; j <= r - mid; j++) { Mc<u?H
temp[r - j + 1] = data[j + mid]; UoPY:(?;i
} s*s~yH6
int a = temp[l]; Q@7d:v
int b = temp[r]; zh|9\lf
for (i = l, j = r, k = l; k <= r; k++) { JXM]tV
if (a < b) { hHGuD2%
data[k] = temp[i++]; DY9]$h*y
a = temp; OZ+v ~'oD
} else { t&:L?K)j
data[k] = temp[j--]; [:FiA?O]
b = temp[j]; a&V;^ /
} DU0/if9.
} fGO\f;P
} ^lAM /
TS#[[^!S
/** nYFrp)DLK
* @param data wD=]U@t`,
* @param l YZj*F-}
* @param i NC#F:M;b
*/ s2#Ia>5!
private void insertSort(int[] data, int start, int len) { i'7+ ?YL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |1RVm?~i
} LP=j/qf|
} d 8DU[p
} ](A2,F 9(U
} T*f/M
>WIc"y.
堆排序： xbm%+
G[A3H> >
package org.rut.util.algorithm.support; o87kF!x
%VH,(}i
import org.rut.util.algorithm.SortUtil; nuXL{tg6
=o~GLbsER
/** sVK?sBs]
* @author treeroot o`,~#P|
* @since 2006-2-2 IQRuqp KL
* @version 1.0 v6s,lC5qR
*/ B*,)@h
public class HeapSort implements SortUtil.Sort{ 0Gc@AG{
d<6F'F^w.7
/* (non-Javadoc) 1^4:l!0D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PDuc;RG
*/ @kqxN\DE
public void sort(int[] data) { @Fb1D"!
MaxHeap h=new MaxHeap(); +yp:douERi
h.init(data); :-B+W9'5
for(int i=0;i h.remove(); d=PX}o^
System.arraycopy(h.queue,1,data,0,data.length); _r*\ BM8y
} jYFJk&c
[/CGV8+
private static class MaxHeap{ a:fP
U}RBgPX!
void init(int[] data){ UowvkVa
this.queue=new int[data.length+1]; y %Q.(
for(int i=0;i queue[++size]=data; <Gi%+I@szl
fixUp(size); +cfEyiub
} z*EV>Y[
} MLu!8dgI
d_,5;M^k
private int size=0; ];OvV ,*
#*'Qm A
private int[] queue; Dz(\ ?
S^eem_C
public int get() { 5e/YEDP
return queue[1]; x,!Dd
} 1)56ec<c
sD:o 2(G*
public void remove() { UX@%1W!8
SortUtil.swap(queue,1,size--); Lwr's'ao.
fixDown(1); ~v+kO~
} ^$K&Met
file://fixdown Yv5H41o"
private void fixDown(int k) { u4C9ZYN
int j; U!aM63F3
while ((j = k << 1) <= size) { V4n~Z+k
if (j < size %26amp;%26amp; queue[j] j++; GtVT^u_
if (queue[k]>queue[j]) file://不用交换 @-'a{hBR
break; Nmj)TOEPW
SortUtil.swap(queue,j,k); hMa;\k
k = j; Y~WdN<g
} %_ibe
} jYHnJ}<
private void fixUp(int k) { Dfs*~H63
while (k > 1) { s-$Wc)l
int j = k >> 1; dFm_"135
if (queue[j]>queue[k]) % i4 5
break; cb|+6m~
SortUtil.swap(queue,j,k); ABN4kM>%
k = j; tk&AZb,sP
} ;xZ+1zmL0
} _MBhwNBxZ
hOY@vm&
} >}+{;d
fg^AEn1i
} #ibwD:{
fp)SZu_*
SortUtil： g2vm]j
U?*zb
package org.rut.util.algorithm; x]{P.7IO'
Mg;pNK\n
import org.rut.util.algorithm.support.BubbleSort; E#$Jg|e
import org.rut.util.algorithm.support.HeapSort; Vu:ZG*^
import org.rut.util.algorithm.support.ImprovedMergeSort; Q$E.G63Wl
import org.rut.util.algorithm.support.ImprovedQuickSort; [';o -c"!
import org.rut.util.algorithm.support.InsertSort; hdPGqJE
import org.rut.util.algorithm.support.MergeSort; %Mda<3P
import org.rut.util.algorithm.support.QuickSort; (S~kyU!)0
import org.rut.util.algorithm.support.SelectionSort; 1dQAo1
import org.rut.util.algorithm.support.ShellSort; r&{8/ 5"
nTeA=0 4
/** @dWA1tM
* @author treeroot DYf QlA
* @since 2006-2-2 :_8K8Sa
* @version 1.0 g3:@90Ba
*/ GV0\+A"vD
public class SortUtil { |+Y-i4t
public final static int INSERT = 1; _:r8UVAT.
public final static int BUBBLE = 2; ,:?ibE=
public final static int SELECTION = 3; J,=K1>8s
public final static int SHELL = 4; hX.cdt_?
public final static int QUICK = 5; uf6egm5]
public final static int IMPROVED_QUICK = 6; _3`GZeGV
public final static int MERGE = 7; Jt_=aMY:7
public final static int IMPROVED_MERGE = 8; 6] x6FeuS
public final static int HEAP = 9; b)diYsTH
^?cu9S3
public static void sort(int[] data) { yu;EL>G_AY
sort(data, IMPROVED_QUICK); SZWNN#w60?
} 2(eO5.FYF
private static String[] name={ JtFq/&{i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y&6jFT_
}; {7:1F)Pj
Y25`vE(
private static Sort[] impl=new Sort[]{ D!`[fjs6A
new InsertSort(), ef)RlzLOq
new BubbleSort(), TGJz[Ny
new SelectionSort(), Wg|6{'a
new ShellSort(), REh"/d
new QuickSort(), 8W&1"h`
new ImprovedQuickSort(), K*@?BE
new MergeSort(), 56Wh<i3
new ImprovedMergeSort(), $u<;X^
new HeapSort() K)'[^V Xh
}; )I%M]K]F
V%R]jbHZ#
public static String toString(int algorithm){ #Pd9i5~N
return name[algorithm-1]; ([8*Py|
} `oxBIn*BD
f#s6 'g
public static void sort(int[] data, int algorithm) { )z7CT|h7S
impl[algorithm-1].sort(data); `wi+/^);
} 1uo-?k
-M{szH
public static interface Sort { XRPJPwes]
public void sort(int[] data); < se~wR
} mS%4
#un'?]tZF
public static void swap(int[] data, int i, int j) { &* VhtT?=5
int temp = data; v[$e{Dz(
data = data[j]; -RP{viGWK
data[j] = temp; W? G4>zA
} J_)F/S!T
} !XTzsN