[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; V"BVvSNu
} eoC<a"bJ>
int i1=l; I,w^?o
int i2=mid+1; [e1\A&T
for(int cur=l;cur<=r;cur++){ ~{9x6<g!
if(i1==mid+1) FfjC M7?
data[cur]=temp[i2++]; C~:b*X
else if(i2>r) tRkrV]K
data[cur]=temp[i1++]; Px$'(eMj^3
else if(temp[i1] data[cur]=temp[i1++]; Lq%[A*`^
else {.cB>L
data[cur]=temp[i2++]; Qk|( EFQ9
} A?\h|u<
} 2-p8rGI_F
}@3$)L%n_u
} ?DJuQFv
1XQ87~
改进后的归并排序: +7`u9j.
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package org.rut.util.algorithm.support; |%n|[LP'
BzN/6VEw
import org.rut.util.algorithm.SortUtil; EWSr@}2j .
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/** ozT._C
* @author treeroot oJhEHx[f
* @since 2006-2-2 pn+D@x#IA
* @version 1.0 Z=0iPy,m>
*/ $&bU2]
public class ImprovedMergeSort implements SortUtil.Sort { 9tW3!O^_
"sC$%D<oc
private static final int THRESHOLD = 10; jBT*~DyN z
N45s'rF
/* <Wp`[S]r
* (non-Javadoc) Mf!owpW T
* L!`*R)I45
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ( ?atGFgu
*/ jY1^+y{
public void sort(int[] data) { hLu&lY
int[] temp=new int[data.length]; JiG8jB7%}
mergeSort(data,temp,0,data.length-1); Kv(Y }
} ^Z#<tN;
0tn7Rkiw
private void mergeSort(int[] data, int[] temp, int l, int r) { Lqy|DJ%
int i, j, k; ={e#lC
int mid = (l + r) / 2; 5|{ t+u
if (l == r) &1\u#LU
return; p?EEox
if ((mid - l) >= THRESHOLD) +z{x 7
mergeSort(data, temp, l, mid); %t,1_c0w
else -K{\S2
insertSort(data, l, mid - l + 1); So3,Z'z=
if ((r - mid) > THRESHOLD) P7M0Ce~iW
mergeSort(data, temp, mid + 1, r); x`&P}4v0
else :Map,]]B_
insertSort(data, mid + 1, r - mid); >B|ofwm*
9}7oKlyk
for (i = l; i <= mid; i++) { 74</6T]^
temp = data; Y+S~b
} 5cv, >{~5
for (j = 1; j <= r - mid; j++) { t/4/G']W
temp[r - j + 1] = data[j + mid]; 9 u6 g
} [bQ8A(u
int a = temp[l]; hU=f?jo/
int b = temp[r]; &QHA_+88W
for (i = l, j = r, k = l; k <= r; k++) { 3M5=@Fwkr
if (a < b) { 5wVi{P5+
data[k] = temp[i++]; Av\0GqF
a = temp; >Kqj{/SWK
} else { 2n\i0?RD
data[k] = temp[j--]; V3.vE,
b = temp[j]; W"DxIy
} ln_EL?V
} 8I|1Pl
} jw&}N6^G
'SXpb?CZ
/** `^@g2c+d
* @param data QyBK*uNdV
* @param l ?7uStqa
* @param i x<j($iv
*/ (,Zz&3 AV
private void insertSort(int[] data, int start, int len) { Ib<5u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L>K39z~,
} cUX]tiC0
} $T@xnZ
} tue%L]hc
} )r-|T&Sn
pR^Y|NG!
堆排序： mqfEs0~I
0V>N#P]
package org.rut.util.algorithm.support; c&iK+qvh{
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import org.rut.util.algorithm.SortUtil; ^#6%*(D
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/** "YJ;-$rb
* @author treeroot M#gGD-
* @since 2006-2-2 F(kRAe;
* @version 1.0 "5z6~dq
*/ P(gID
public class HeapSort implements SortUtil.Sort{ 5In8VE !P
h,RUL
/* (non-Javadoc) 1*Fvx-U'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R5~vmT5W
*/ x;b+gIz*
public void sort(int[] data) { =;?PVAdu%#
MaxHeap h=new MaxHeap(); @nW(KF
h.init(data); )-:f;#xJ
for(int i=0;i h.remove(); F/,<dNJ
System.arraycopy(h.queue,1,data,0,data.length); ^T J
} SbNUX
x@RA1&c
private static class MaxHeap{ h],%va[
K*i1! "w
void init(int[] data){ .KMi)1L)
this.queue=new int[data.length+1]; GP kCgb(
for(int i=0;i queue[++size]=data; YD>>YaH_3@
fixUp(size); Pj5#G0i%
} wk7_(gT`0
} UE;)mZ=l|
7 QJcRZ[lU
private int size=0; "ddH7:(k<
aI#n+PW
private int[] queue; CO+jB
r4>I?lD
public int get() { 0mi[|~x=
return queue[1]; ~O7(0RsCN
} h*LL(ow5
5K-)X9z?
public void remove() { NKh{iSLm
SortUtil.swap(queue,1,size--); ZVR 9vw28
fixDown(1); r/<JY5
} 'i-O
file://fixdown @{a-IW3
private void fixDown(int k) { nY0UnlB`
int j; PGhZ`nl
while ((j = k << 1) <= size) { h4i$z-!
if (j < size %26amp;%26amp; queue[j] j++; Oo .Qz
if (queue[k]>queue[j]) file://不用交换 pREYAZh
break; L=FvLii.
SortUtil.swap(queue,j,k); z$5C(!)
k = j; JB_`lefW,'
} Y--8v#t
} ck+rOGv7{Z
private void fixUp(int k) { O;sQPG,v
while (k > 1) { Y6PA\7Y\
int j = k >> 1; p>O< "X@
if (queue[j]>queue[k]) o+Z9h1z%,
break; 5z>\'a1U
SortUtil.swap(queue,j,k); D.!7jA#
k = j; lhj2u]yU0S
} F ;&e5G
} 9v2 ;
.)zISa*Xy
} XOU$3+8q5
T+D]bfjr&&
} (W!$6+GT
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SortUtil： y]9UFL"
2f4c;YS
package org.rut.util.algorithm; ;BVhkWA
9-6_:N>
import org.rut.util.algorithm.support.BubbleSort; O+j:L
import org.rut.util.algorithm.support.HeapSort; V~Lq,oth
import org.rut.util.algorithm.support.ImprovedMergeSort; #B9[U} 8
import org.rut.util.algorithm.support.ImprovedQuickSort; $'*BS
import org.rut.util.algorithm.support.InsertSort; b{Ss+F
import org.rut.util.algorithm.support.MergeSort; 6Qu*'
import org.rut.util.algorithm.support.QuickSort; R!G7;m'N1
import org.rut.util.algorithm.support.SelectionSort; vDvGT<d
import org.rut.util.algorithm.support.ShellSort; $SR]7GZ
3>Snd9Q
/** n<*]`do,w
* @author treeroot N@)~j+Pz
* @since 2006-2-2 ,ua1xsZl&
* @version 1.0 E ET 2|*}
*/ NkI:
public class SortUtil { s3 $Q_8H
public final static int INSERT = 1; Jo<6M'
public final static int BUBBLE = 2; tvRy8u;
public final static int SELECTION = 3; 4N j?UDa
public final static int SHELL = 4; ;i>E@
public final static int QUICK = 5; 7!;/w;C
public final static int IMPROVED_QUICK = 6; aM!#
public final static int MERGE = 7; Bnq\Gg
public final static int IMPROVED_MERGE = 8; [CX?Tt
public final static int HEAP = 9; q/79'>`|ai
P.DWC'IBN
public static void sort(int[] data) { #57z-x[1
sort(data, IMPROVED_QUICK); Iq\oB
} "@$STptkc
private static String[] name={ |"v{RC0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Uiw7Y\Im|
}; +to9].O7y
ts>}>}@vc
private static Sort[] impl=new Sort[]{ 7:'>~>'
new InsertSort(), krc!BK`V
new BubbleSort(), [)n}!5fE
new SelectionSort(), %$| k3[4V
new ShellSort(), HH@xnd
new QuickSort(), . *xq =
new ImprovedQuickSort(), 'U$VOq?!
new MergeSort(), z-gG(
new ImprovedMergeSort(), v*'\w#
new HeapSort() ~1sl.8tF
}; ygt)7f5
^I?y\:.
public static String toString(int algorithm){ Z"Ni Y
return name[algorithm-1]; g>P9hIl
} 4{t$M}?N
DNBpIC5&6
public static void sort(int[] data, int algorithm) { #!# X3j
impl[algorithm-1].sort(data); yx w27~
} zQ %z"tQ
#Y>%Dr&
public static interface Sort { vcJb\LW
public void sort(int[] data); KSB_%OI1
} giPo;z\c
RzJ}CT
public static void swap(int[] data, int i, int j) { K0RYI69_
int temp = data; bZay/ Zkj
data = data[j]; &}6ES{Nr8
data[j] = temp; }-q`&1!t
} i,Wm{+H-O
} !eAdm