[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; Fy<dk}@
} 7,_N9Q]rB
int i1=l; AMvM H
int i2=mid+1; TC3xrE:U<m
for(int cur=l;cur<=r;cur++){ H;}V`}c<`
if(i1==mid+1) K%>uSS?
data[cur]=temp[i2++]; 9xC,i )
else if(i2>r) Q5iuK#/
data[cur]=temp[i1++]; `w]=xe
else if(temp[i1] data[cur]=temp[i1++]; &`<j!xlG
else 8(D>ws$
data[cur]=temp[i2++]; w@4q D
} yjpV71!M
} ?K{CjwE.M
kVQKP U
} x+"~-KO8q$
!tFs(![
改进后的归并排序: m"~$JA u
[z`U9J
package org.rut.util.algorithm.support; N>7INK
yuk64o2QE
import org.rut.util.algorithm.SortUtil; a>Uk<#>2?a
]~)FMWQz-
/** _odP:
* @author treeroot X<_(gg
* @since 2006-2-2 6Ez}A|i
* @version 1.0 ge[f/"u
*/ 29pIO]8;
public class ImprovedMergeSort implements SortUtil.Sort { +BM(0M+
h{yqNl
private static final int THRESHOLD = 10; f5Zx:g
z![RC59S
/* Ip( IGR"
* (non-Javadoc) S?*v p=
* N|T%cdh:/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H |Z9]+h)7
*/ t*82^KDU
public void sort(int[] data) { Ezm ~SY
int[] temp=new int[data.length]; .ev'd&l.
mergeSort(data,temp,0,data.length-1); B+wSLi(
} Io{)@H"f
3.?PdK&C
private void mergeSort(int[] data, int[] temp, int l, int r) { Ej ip%m
int i, j, k; 4\Y2{Z>P?
int mid = (l + r) / 2; g` 6Xrf
if (l == r) _NA0$bGN9
return; D(s[=$zua
if ((mid - l) >= THRESHOLD) !9k)hP
mergeSort(data, temp, l, mid); ]&qujH^Dd*
else 2r"-X
insertSort(data, l, mid - l + 1); r@H<@Vuc
if ((r - mid) > THRESHOLD) ITRv^IlF
mergeSort(data, temp, mid + 1, r); iQZgs@
else Lcf =)GL
insertSort(data, mid + 1, r - mid); 1[a;2xA~
$&='&q
for (i = l; i <= mid; i++) { *;(LKRV
temp = data; B[!wo
} ATv.3cy
for (j = 1; j <= r - mid; j++) { UW<V(6P
temp[r - j + 1] = data[j + mid]; qXkc~{W_
} ea=@r Ng
int a = temp[l]; /fWVgyW>6
int b = temp[r]; k;R*mg*K
for (i = l, j = r, k = l; k <= r; k++) { l];,)ddD9
if (a < b) { D!ToCVos
data[k] = temp[i++]; /);cl;"
a = temp; f:GZb?Wyd
} else { dOqn0Z
data[k] = temp[j--]; DHW;*A-
b = temp[j]; DT8|2"H
} Lf&p2p?~c
} ?0WJB[/
} `B"=\0
+n%uIv
/** m\__Fl
* @param data ZTWbe
* @param l ;M{ @23?`
* @param i :kfHILi
*/ gXZ.je)NM
private void insertSort(int[] data, int start, int len) { d%\{,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wLPL9
} [iwn"e
} [bIdhG
} M])Y|}wv8
} ((\s4-
VJS|H!CH
堆排序： ~(aQ!!H6
suN{)"
package org.rut.util.algorithm.support; =LL5E}xP
B t-o:)pa
import org.rut.util.algorithm.SortUtil; Pk7Yq:avL
O7I:Y85i#O
/** 0PIC|
* @author treeroot E9;cd$}K
* @since 2006-2-2 p[VBeO^%
* @version 1.0 6n]fr9f
*/ 9; HR
public class HeapSort implements SortUtil.Sort{ 4*g`!~)
H2l/9+
/* (non-Javadoc) ~z$vF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z/)HJo2#
*/ (GJ)FWen0"
public void sort(int[] data) { fD
MaxHeap h=new MaxHeap(); YQvN;W
h.init(data); y~w2^VN=
for(int i=0;i h.remove(); w7$*J:{
System.arraycopy(h.queue,1,data,0,data.length); Q9H~B`\nQ
} D'F=v\P
f ."bq43(
private static class MaxHeap{ Wjn1W;m&g
>c*}Do{lG
void init(int[] data){ `/#f8R1g
this.queue=new int[data.length+1]; !5wm9I!5^
for(int i=0;i queue[++size]=data; Zj99]4?9
fixUp(size); 8Gzc3
} hn#i,XnY
} ya0L8`q
!jL|HwlA
private int size=0; O6NgI2[O
8rAOs\ys
private int[] queue; ^6bU4bA
8bLA6qmM\
public int get() { cu5Yvp
return queue[1]; _nOJ.G
} OW-[#r
1-r#v
public void remove() { L!Iu\_{q
SortUtil.swap(queue,1,size--); eEePK~%c
fixDown(1); <RS@,
} laG@SV
file://fixdown Z|K+{{C
private void fixDown(int k) { 5:6as^i:b
int j; v*SSc5gFG
while ((j = k << 1) <= size) { AA"?2dF
if (j < size %26amp;%26amp; queue[j] j++; N@lTn}U
if (queue[k]>queue[j]) file://不用交换 LFvKF.
break; sy=M#WGS
SortUtil.swap(queue,j,k); A9' [x7N
k = j; uo;aC$US
} fhw.A5Ck
} aN?{MA\
private void fixUp(int k) { ~CgKU8
while (k > 1) { {L5!_]6
int j = k >> 1; hqIYo .<
if (queue[j]>queue[k]) N=^{FZ
break; r63_|~JVB<
SortUtil.swap(queue,j,k); 55MrsiW
k = j; _\hZX|:]
} G=W!$(:
} ~s{yh-B
0OO$(R*
} 3o&PVU?Q
j/`-x
} :Fz;nG-G
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SortUtil： {</MC`
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package org.rut.util.algorithm; SIv8EMGo
/4J2F9:f
import org.rut.util.algorithm.support.BubbleSort; >Ig%|4Hw
import org.rut.util.algorithm.support.HeapSort; LW<DhMV
import org.rut.util.algorithm.support.ImprovedMergeSort; 7^7Rk
import org.rut.util.algorithm.support.ImprovedQuickSort; g+;)?N*j
import org.rut.util.algorithm.support.InsertSort; ,#3u.=IR[
import org.rut.util.algorithm.support.MergeSort; {WQH
import org.rut.util.algorithm.support.QuickSort; 20750G
import org.rut.util.algorithm.support.SelectionSort; Oa~|a7`o
import org.rut.util.algorithm.support.ShellSort; F(c~D0
~V&4<=r`
/** gpW3zDJ
* @author treeroot Kk#g(YgNz
* @since 2006-2-2 Pw i6Ly`
* @version 1.0 q"xIW0Pc
*/ 7?a@i;E<
public class SortUtil { T\ZWKx*#
public final static int INSERT = 1; D%GB2-j R
public final static int BUBBLE = 2; 3mKmd iD
public final static int SELECTION = 3; qD=o;:~Km
public final static int SHELL = 4; NfvvwG;M
public final static int QUICK = 5; g"vg {Q
public final static int IMPROVED_QUICK = 6; )';Rb$<Qn
public final static int MERGE = 7; 5$Lo]H*
public final static int IMPROVED_MERGE = 8; M\O6~UFq!
public final static int HEAP = 9; Tap=K|b ]
AoB~ZWq
public static void sort(int[] data) { jiQJ{yY
sort(data, IMPROVED_QUICK); 0f~7n*XH
} u=NpL^6s<
private static String[] name={ 2<HG=iSf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z0*Lm+d9z
}; y57]q#k
CBw/a0Uck
private static Sort[] impl=new Sort[]{ EV{kd.=f
new InsertSort(), '{=dEEi
new BubbleSort(), 5N "fD{v{
new SelectionSort(), XOgl>1O
new ShellSort(), R\k= CoJJ
new QuickSort(), pwo5Ij,~q
new ImprovedQuickSort(), ?&#z3c$}
new MergeSort(), -;pZC}Nd3
new ImprovedMergeSort(), ,,1H#;j
new HeapSort() )D\cm7WX^[
}; x/D"a|
(O{5L(
public static String toString(int algorithm){ <Wc98m
return name[algorithm-1]; k$ k/U
} v,t;!u,40
&2IrST{d:V
public static void sort(int[] data, int algorithm) { /N6sH!w
impl[algorithm-1].sort(data); 1,@-y#V_
} @8WG
i(DoAfYf/q
public static interface Sort { <cu? g
public void sort(int[] data); Q79& Q04XN
} Z* eb
5sJi- ^
public static void swap(int[] data, int i, int j) { Pw:(X0@
int temp = data; Hik8u!#P
data = data[j]; <[{Ty+
data[j] = temp; BG:l Zj'I
} 6&/H XqP
} p;Ezmz