[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; 8,4"uuI
} { ]{/t-=
int i1=l; VU(v3^1"
int i2=mid+1; QL&ZjSN
for(int cur=l;cur<=r;cur++){ -`kW&I0
if(i1==mid+1) W0@n/U
data[cur]=temp[i2++]; vXf!G`D
else if(i2>r) feDlH[$
data[cur]=temp[i1++]; t ;;U}
else if(temp[i1] data[cur]=temp[i1++]; |O|V-f{l
else |!3DPA(_
data[cur]=temp[i2++]; N=5a54!/
} w!-gJmX>
} O|{d[eX
{j?FNOJn
} *SDs;kg
N1}sHyVq7
改进后的归并排序: .+3g*Dv{&
yy^q2P
package org.rut.util.algorithm.support; '4+ ur`
F2LLN
import org.rut.util.algorithm.SortUtil; :Uzm
M#4pE_G
/** )9{0]u;9
* @author treeroot \^J%sf${
* @since 2006-2-2 d9fC<Tp
* @version 1.0 XH4
*/ %+W{iu[|
public class ImprovedMergeSort implements SortUtil.Sort { fP 1[[3i
}(J}f)
private static final int THRESHOLD = 10; ;;OAQ`
O>bC2;+s
/* X1x#6 oi
* (non-Javadoc) #4Rx]zW^%
* TCwFPlF|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dk#k bG;
*/ s^G.]%iU
public void sort(int[] data) { A@!qv#'
int[] temp=new int[data.length]; 45@ I*`
mergeSort(data,temp,0,data.length-1); -8ywO"6
} oi&VgnSk
*k(XW_>
private void mergeSort(int[] data, int[] temp, int l, int r) { y*jp79G
int i, j, k; jjB~G^n
int mid = (l + r) / 2; m<T%Rb4?@
if (l == r) O~#!l"0 L+
return; `!;_ho
if ((mid - l) >= THRESHOLD) gZ3u=uME
mergeSort(data, temp, l, mid); Xv5wJlc!d
else Ct<udO
insertSort(data, l, mid - l + 1); H7&8\FNa
if ((r - mid) > THRESHOLD) FF`T\&u
mergeSort(data, temp, mid + 1, r); 9X+V4xux
else wj$<t'MN
insertSort(data, mid + 1, r - mid); ~rqCN,=d
urs,34h
for (i = l; i <= mid; i++) { .LnGL]/
temp = data; 8?#/o c
} .GPT!lDc
for (j = 1; j <= r - mid; j++) { YNyk1cE
temp[r - j + 1] = data[j + mid]; ` xEx^P^7
} $kdB |4C
int a = temp[l]; g#pr yYz
int b = temp[r]; FBe;1OU
for (i = l, j = r, k = l; k <= r; k++) { 9]([\%)
if (a < b) { r,8 [O
data[k] = temp[i++]; x/I%2F
a = temp; B?gOHG*vd>
} else { Drgv`z
data[k] = temp[j--]; +<Nn~1
b = temp[j]; >^?u .gM3
} `t>l:<@%
} iJ)_RSFK
} 9IdA%RM~mH
\$~|ZwV{
/** #K_ii)n
* @param data [B*x-R[FI
* @param l HTv2#
* @param i vFzRg5lH
*/ ^qvZXb
private void insertSort(int[] data, int start, int len) { 7dTkp!'X-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fbr;{T .
} 8+Lm's=W*
} ~f&E7su-6+
} +/4A
} 64 wv<r]5j
IYE~t
堆排序： ,B*EVN
[: n'k
package org.rut.util.algorithm.support; +5g_KS
&T?RZ2
import org.rut.util.algorithm.SortUtil; oz\!V*CtK
K-^\" W8
/** q5J5>
* @author treeroot Gt8M&S-;
* @since 2006-2-2 xjUT{iwS
* @version 1.0 |#v7/$!
*/ u"r`3P`
public class HeapSort implements SortUtil.Sort{ D#9m\o_
?um;s-x)
/* (non-Javadoc) ]!W=^!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ihhDOmUto
*/ %OL$57Ia
public void sort(int[] data) { ^&9zw\x;z
MaxHeap h=new MaxHeap(); #X+JHl
h.init(data); W@M:a
for(int i=0;i h.remove(); 5 Aw"B
System.arraycopy(h.queue,1,data,0,data.length); 6fE7W>la
} Di,^%
:;%2BSgFU
private static class MaxHeap{ KC*e/J
y;m|
void init(int[] data){ UP$.+<vm
this.queue=new int[data.length+1]; w8")w*9Lmg
for(int i=0;i queue[++size]=data; 9d0@wq.
fixUp(size); =g7x' kN
} ;Zcswt8]u
} gs^Xf;gvI
*?@?f&E/
private int size=0; ]\-A;}\e
ch*8B(:
private int[] queue; &@X<zWg
{ T/[cu<
public int get() { T= 80,
return queue[1]; \i>?q
} Fk&c=V;SU
x /(^7#u,
public void remove() { 2lZ Q)
SortUtil.swap(queue,1,size--); u74[>^
fixDown(1); `z}?"BW|
} yt+L0wzzB
file://fixdown ydEoC$?0
private void fixDown(int k) { xWH.^o,"
int j; >>4qJ%bL
while ((j = k << 1) <= size) { sU<Wnz\[
if (j < size %26amp;%26amp; queue[j] j++; }`@vF|2L
if (queue[k]>queue[j]) file://不用交换 h6Ub}(Ov
break; %:f&.@'r
SortUtil.swap(queue,j,k); R+hU8 pu
k = j; MVpGWTH@F
} ~p6 V,Q
} EgEa1l!NSQ
private void fixUp(int k) { dM.f]-g
while (k > 1) { pHGYQ;:L
int j = k >> 1; B B{$&Oh
if (queue[j]>queue[k]) ]6,\r"
break; V5@:#BIs
SortUtil.swap(queue,j,k); +uF>2b6'
k = j; -u+vJ6EY
} Gm&Za,4%4
} s2p\]|5
j<m(PHSe
} 3GYw+%Z]
nAAs{
} ;$,U~0
soB,j3#p'*
SortUtil： n-2]M05O
>a<.mU|#
package org.rut.util.algorithm; b}$+H/V
oi7@s0@
import org.rut.util.algorithm.support.BubbleSort; }^WdJd]P
import org.rut.util.algorithm.support.HeapSort; zy?|ODM
import org.rut.util.algorithm.support.ImprovedMergeSort; 5:[0z5Hww
import org.rut.util.algorithm.support.ImprovedQuickSort; 0(}t8lc
import org.rut.util.algorithm.support.InsertSort; f].h^~.q
import org.rut.util.algorithm.support.MergeSort; PA{PD.4Du
import org.rut.util.algorithm.support.QuickSort; dw>C@c#"
import org.rut.util.algorithm.support.SelectionSort; R{`(c/%8
import org.rut.util.algorithm.support.ShellSort; KJUH(]>F
(*9$`!wS
/** C\3rJy(VJ
* @author treeroot FW;?s+Uyx
* @since 2006-2-2 'T;P;:!\
* @version 1.0 4HXo>0
*/ FBX'.\@`
public class SortUtil { Wx%H%FeK
public final static int INSERT = 1; kOrZv,qFG[
public final static int BUBBLE = 2; _#E0g'3
public final static int SELECTION = 3; {GT*ZU*
public final static int SHELL = 4; `6(S^P
public final static int QUICK = 5; IVnHf_PzF
public final static int IMPROVED_QUICK = 6; .bl/*s
public final static int MERGE = 7; %bn jgy
public final static int IMPROVED_MERGE = 8; yf.~XUk^
public final static int HEAP = 9; Mmj;-u
|*eZD-f
public static void sort(int[] data) { 8P\G}
sort(data, IMPROVED_QUICK); Pl06:g2I
} 6dr%;Wp
private static String[] name={ bjW]bRw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pZ{+c
}; |-67\p]
<]t%8GB2V
private static Sort[] impl=new Sort[]{ QD&`^(X1p
new InsertSort(), u(.e8~s8
new BubbleSort(), ,5p(T_V/
new SelectionSort(), |Pax=oJ\M
new ShellSort(), %)8}X>xq
new QuickSort(), '?' l;#^i<
new ImprovedQuickSort(), wh`"w7br
new MergeSort(), nsC3
new ImprovedMergeSort(), Xf]d. :
new HeapSort() k/_ 59@)
}; dh iuI|?@
oG?Xk%7&\
public static String toString(int algorithm){ 9!\B6=r y4
return name[algorithm-1]; !X#OOqPr=
} rl;~pO5R9
yjX9oxhtL
public static void sort(int[] data, int algorithm) { K&]G3W%V
impl[algorithm-1].sort(data); A2Ed0|By
} z (wc0I
x.6:<y
public static interface Sort { ibk6|pp
public void sort(int[] data); >Eto( y"q
} K#d`Hyx
;?iW%:_,
public static void swap(int[] data, int i, int j) { CNyIQ}NJ
int temp = data; DU'`ewLL7
data = data[j]; CAWNDl4
data[j] = temp; BoWg0*5xb
} dt]-,Y
} R4cM%l_#W