[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; 26('V `N
} ,{`o/F/
int i1=l; 0btmao-
int i2=mid+1; cjy0s+>>
for(int cur=l;cur<=r;cur++){ bbQ10H
if(i1==mid+1) 8M3p\}O
data[cur]=temp[i2++]; xvdnEaWe$
else if(i2>r) ;:-2~z~~
data[cur]=temp[i1++]; A3 Rm0
else if(temp[i1] data[cur]=temp[i1++]; %4r!7X|O<
else =XRgT1>e
data[cur]=temp[i2++]; .^9/ 0.g8t
} XDrlJvrPL
} /_zF?5h
Y>dg10=
} BZ\EqB
|$.sB|_ N
改进后的归并排序: ZaNyNxbp>z
5Re`D|8
package org.rut.util.algorithm.support; R uFu,H-
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import org.rut.util.algorithm.SortUtil; %b>y
35@Ibe~
/** e%@[d<Ta\
* @author treeroot 4s1kZ`e
* @since 2006-2-2 M$>WmG1~D
* @version 1.0 1^WA
*/ QX.F1T2e?
public class ImprovedMergeSort implements SortUtil.Sort { Be14$7r
L3G)?rPFC#
private static final int THRESHOLD = 10; (7Ca\H3$
/k3n{?$/
/* ?^G$;X7B
* (non-Javadoc) a`h$lUb-
* _!CvtUU0Vv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4Ow Vt&
*/ o{-USUGj7
public void sort(int[] data) { gE6y&a
int[] temp=new int[data.length]; *NwKD:o
mergeSort(data,temp,0,data.length-1); (W}i287
} !+*?pq
{C0OrO2:
private void mergeSort(int[] data, int[] temp, int l, int r) { j_ywG{Jk
int i, j, k; 2fL88/'
int mid = (l + r) / 2; I8-&.RE
if (l == r) k+m_L{#m5
return; *>&N t
if ((mid - l) >= THRESHOLD) K_lCDiqG
mergeSort(data, temp, l, mid); 9V4V}[%
else On96N|
insertSort(data, l, mid - l + 1); S}xDB
if ((r - mid) > THRESHOLD) (?&_6B.*
mergeSort(data, temp, mid + 1, r); ! 4^L $
else %BYlbEx
insertSort(data, mid + 1, r - mid); yS.fe[
lA^Kh
for (i = l; i <= mid; i++) { 6 peM4X
temp = data; woH3?zR
} }Bod#|`
for (j = 1; j <= r - mid; j++) { $O]E$S${
temp[r - j + 1] = data[j + mid]; ae(]9VW
} ;u-< {2P
int a = temp[l]; kAQ\t?`x
int b = temp[r]; Vp-OGX[
for (i = l, j = r, k = l; k <= r; k++) { cwW~ *90#
if (a < b) { -m x3^
data[k] = temp[i++]; n5,Pq+[
a = temp; &<#BsFz
} else { Kn9=a-b?,
data[k] = temp[j--]; :#&U95EC0
b = temp[j]; T=p}By3a
} ~E6+2t*
} @Qsg.9N3K
} &40JN}
G'}_ZUy#
/** &LxzAL,3!
* @param data /jL{JF>I
* @param l RVKaqJ0e<
* @param i ^%OH}Z`ly
*/ K/.hJ
private void insertSort(int[] data, int start, int len) { 7rDRu]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r`E1<aCr|
} 4oaP"T@6
} T[!q&kFB
} HOQ _T4
} :~A1Ud4c
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堆排序： kA:;c}p
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package org.rut.util.algorithm.support; [,A'
m"m;(T{ v
import org.rut.util.algorithm.SortUtil; h}:5hi Jw
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/** !VZCM{
* @author treeroot ZwrYss
* @since 2006-2-2 u(G;57ms
* @version 1.0 (lck6v?h
*/ PQ#-.K
public class HeapSort implements SortUtil.Sort{ ,c %gwzU
Q@.9wEAJ
/* (non-Javadoc) _.8]7f`*Gc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^l2d?v8
*/ _TcQ12H 5<
public void sort(int[] data) { X'Il:SK
MaxHeap h=new MaxHeap(); !J?=nSu
h.init(data); OsSiBb,W79
for(int i=0;i h.remove(); >`V|`Zi ?
System.arraycopy(h.queue,1,data,0,data.length); AkQFb2|ir
} ?}Ptb&Vk(
o?hw2-mH
private static class MaxHeap{ VKfHN_m*
\C\y'H5
void init(int[] data){ A)a+LW'=u
this.queue=new int[data.length+1]; 4Jy,IKPp
for(int i=0;i queue[++size]=data; j<-o{6r
fixUp(size); "N:]d*A\
} V'hz1roe
} !<^j!'2
@DKl<F
private int size=0; 5Fm?,^
<?@46d?C
private int[] queue; w]YyU5rhS
"&o@%){]
public int get() { Tu#k+f*s
return queue[1]; 9@>hm>g.
} _q4dgi z
CbaAnm1
public void remove() { gY^TBR0?m
SortUtil.swap(queue,1,size--); (S 3kP5:F
fixDown(1); \yizIo.Y`
} MZMv.OeYt,
file://fixdown @y2Bq['
private void fixDown(int k) { >oYwzK0&
int j; $[;eb,
while ((j = k << 1) <= size) { =` >Nfa+,
if (j < size %26amp;%26amp; queue[j] j++; F88SV6
if (queue[k]>queue[j]) file://不用交换 Pw{{+PBu R
break; @%85k/(
SortUtil.swap(queue,j,k); .{ Lm
k = j; 3'uES4+r
} Z"nuO\zH~
} #Z5Wk
private void fixUp(int k) { 3>3ZfFC
while (k > 1) { KEB>}_[
int j = k >> 1; /FZ )ej\
if (queue[j]>queue[k]) tD482Sb=
break; U,}T ]J
SortUtil.swap(queue,j,k); T $]L 5
k = j; dOgM9P
} ptL}F~
} 'QS~<^-j"
APm[)vw#f
} =U|SK"oO
cDol o1*
} |L-juT X9
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SortUtil： .5r0%
T1 .@Tbbt
package org.rut.util.algorithm; -mdPqVIJn:
`erQp0fBM
import org.rut.util.algorithm.support.BubbleSort; .f<,H+m^
import org.rut.util.algorithm.support.HeapSort; /P}tgcs
import org.rut.util.algorithm.support.ImprovedMergeSort; :iiTz$yk
import org.rut.util.algorithm.support.ImprovedQuickSort; bvvx(?!
import org.rut.util.algorithm.support.InsertSort; ptfADG
import org.rut.util.algorithm.support.MergeSort; S(s~4(o>8
import org.rut.util.algorithm.support.QuickSort; O@&I.d$
import org.rut.util.algorithm.support.SelectionSort; tELnq#<6
import org.rut.util.algorithm.support.ShellSort; \:28z
dL"i\5#%A
/** "2j~3aWj
* @author treeroot !t{!.
* @since 2006-2-2 ozwqK oE
* @version 1.0 ZI]K+jza
*/ nrhpId
public class SortUtil { 4tKf
public final static int INSERT = 1; AMfu|%ZL
public final static int BUBBLE = 2; hzVO.Q*
public final static int SELECTION = 3; }/FM#Xh
public final static int SHELL = 4; k(^b
public final static int QUICK = 5; f}d@G/L
public final static int IMPROVED_QUICK = 6; +6E<+-N
public final static int MERGE = 7; o?8j*]
public final static int IMPROVED_MERGE = 8; .v8=zi:7Y
public final static int HEAP = 9; (jMp`4P
}Ec"&
public static void sort(int[] data) { lK@r?w|<M
sort(data, IMPROVED_QUICK); '*.};t~;"d
} : P2;9+v
private static String[] name={ ~qxc!k!w4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2M`Ni&v
}; ^ZBkt7
m>:ig\
private static Sort[] impl=new Sort[]{ nJw1Sl5
new InsertSort(), Onyq'
new BubbleSort(), .l'QCW9
new SelectionSort(), `/iN%ZKum
new ShellSort(), 9LRY
new QuickSort(), =7@
new ImprovedQuickSort(), k{8N@&D
new MergeSort(), pp_ddk
new ImprovedMergeSort(), l)bUHh5[
new HeapSort() 0$ EJ4
}; w|#79,&
}e w?{
public static String toString(int algorithm){ _"TG:RP
return name[algorithm-1]; QY!A[!6h
} HX[#tT|m~
jlZNANR3
public static void sort(int[] data, int algorithm) { 7MfvU|D[d/
impl[algorithm-1].sort(data); Jl}7]cVq#
} @UBp;pb}=h
]sE^=;Pv?
public static interface Sort { \NRRN eu|
public void sort(int[] data); %M:"Ai5:
} v]sGdZ(6-
nV1, ):kh
public static void swap(int[] data, int i, int j) { ea/6$f9^
int temp = data; N~YeAe~+
data = data[j]; **[p{R]8o
data[j] = temp; b*7i&q'H
} J0o[WD$Ax
} U[u6UG