[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; ;Ce?f=4
} e[?,'Mp9
int i1=l; h]L.6G|hEN
int i2=mid+1; BWQ`8
for(int cur=l;cur<=r;cur++){ SMIDW}U2S
if(i1==mid+1) <F(S_w62
data[cur]=temp[i2++]; .d}yQ#5z
else if(i2>r) 4sntSlz)~k
data[cur]=temp[i1++]; 7Mq{Py1
else if(temp[i1] data[cur]=temp[i1++]; Il9xNVos#
else +uSp3gE"
data[cur]=temp[i2++]; CQNMCYjg(R
} iLIb-d?!a&
} vPGUE`!D+
~nhO*bs}7{
} K!Fem6R
/&Cq-W
改进后的归并排序: Sh1$AGm
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package org.rut.util.algorithm.support; jrFPd
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import org.rut.util.algorithm.SortUtil; #*/nUbsg
=1dczJHV
/** wn?oHz*
* @author treeroot #O!2
* @since 2006-2-2 m~*qS4
* @version 1.0 ]Q ]y*
*/ Tx~w(A4:
public class ImprovedMergeSort implements SortUtil.Sort { Uz_p-J0
717THci3Y
private static final int THRESHOLD = 10; Wz=& 0>Mm_
Dka8[z7
/* 1HKA`]D"p
* (non-Javadoc) 0?8>{!I
* R[v0T/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9#9bm
*/ 0RtZTCGO
public void sort(int[] data) { )I3E
int[] temp=new int[data.length]; MKvmzLh$)
mergeSort(data,temp,0,data.length-1); g*My1+J!
} Nwt[)\W `
&gruYZGK
private void mergeSort(int[] data, int[] temp, int l, int r) { V\x'w*FP
int i, j, k; 2,q*8=?{6P
int mid = (l + r) / 2; oA[`| ji
if (l == r) dp^PiyL
return; gJr)z7W'8
if ((mid - l) >= THRESHOLD) D{Nd2G
mergeSort(data, temp, l, mid); n]Yz<#
else }a[]I%bu2
insertSort(data, l, mid - l + 1); XWAIW=.
if ((r - mid) > THRESHOLD) Ewp2 1
mergeSort(data, temp, mid + 1, r); p?>J86%[
else z^`4n_(Ygu
insertSort(data, mid + 1, r - mid); @,eo*
"Ot%{&:2
for (i = l; i <= mid; i++) { VD7-;
temp = data; esA^-$
} |(*btdqy3
for (j = 1; j <= r - mid; j++) { 8 <;.[l
temp[r - j + 1] = data[j + mid]; o.NU"$\?
} &4|]VOf
int a = temp[l]; hG.}>(VV
int b = temp[r]; <Tjhj*
for (i = l, j = r, k = l; k <= r; k++) { ] 9C)F*r7
if (a < b) { zA6C{L G3
data[k] = temp[i++]; z+;$cfN
a = temp; }wn|2K'
} else { ?m2FN<S
data[k] = temp[j--]; nw--
b = temp[j]; 4cSs=|m?+
} !PGCoI
} {CR`~)v&
} JS8pN5
5]]QW3
/** yW1N&$n
* @param data i^jM9MAi
* @param l D*~Q;q>
* @param i fJ.=,9:<
*/ AJLzLbV+
private void insertSort(int[] data, int start, int len) { Z{B[r;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D$)F X(
} "?6*W"N9
} m`fdf>gWp
} 9NVtvBA
} [_xOz4`%
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堆排序： nt|n[-}
/];N1
package org.rut.util.algorithm.support; uc!6?+0h
,B/TqPP
import org.rut.util.algorithm.SortUtil; ~h8k4eM
J+ :3==,
/** |>U<EtA"
* @author treeroot ;:[P/eg
* @since 2006-2-2 g~K-'Nw
* @version 1.0 bt=D<YZk
*/ 8M!9gvcaO
public class HeapSort implements SortUtil.Sort{ $<Gt^3e
EB+4]MsD
/* (non-Javadoc) u"v$[8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "[["naa
*/ 9mMQ
public void sort(int[] data) { C'A D[`p
MaxHeap h=new MaxHeap(); `{"V(YMEV
h.init(data); Bq~S=bAB>R
for(int i=0;i h.remove(); otjT?R2g'
System.arraycopy(h.queue,1,data,0,data.length); ^8oN~HLZ
} p +JOUW
R6;229e
private static class MaxHeap{ w\d1
6I=d0m.io
void init(int[] data){ gPKO-Fsd"
this.queue=new int[data.length+1]; |Zn,|-iW
for(int i=0;i queue[++size]=data; 8sDw:wTC
fixUp(size); X%*BiI
} M-QQ
} b9.7j!W
epk C'
private int size=0; 8[^b8^
E]a,2{&8<
private int[] queue; l3MA&&++KF
DP*V|)
public int get() { Sb?v5
return queue[1]; K~UT@,CS60
} iuEe#B;!
PB8U+
public void remove() { E(S$Q^
SortUtil.swap(queue,1,size--); L-|7 &
fixDown(1); ;2BPEo>z9
} /*S6/#
file://fixdown }FV_jJ
private void fixDown(int k) { P1TTaYu
int j; 3WkrG.$[b
while ((j = k << 1) <= size) { ,0Udz0
if (j < size %26amp;%26amp; queue[j] j++; q}JP;p(#
if (queue[k]>queue[j]) file://不用交换 9~f RYA*
break; }236{)DuN
SortUtil.swap(queue,j,k); |9CPT%A#
k = j; **9[e[(X
} K)`l >o1
} R<h:>.M
private void fixUp(int k) { "wV7PSbM
while (k > 1) { uZ1G,9
int j = k >> 1; "[L+LPET
if (queue[j]>queue[k]) Jn0L_@
break; Fok`-U
SortUtil.swap(queue,j,k); LwQYO'X
k = j; ~ebm,3?
} 1RQM-0W,
} ,8p-EH
=cR=E{20
} 0F 4%Xz
A:sP%c;
} v'y<}U
zq^eL=%:
SortUtil： 4NFvX4
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package org.rut.util.algorithm; n)]u|qq
;x{J45^
import org.rut.util.algorithm.support.BubbleSort; )hA)`hL F
import org.rut.util.algorithm.support.HeapSort; uhmSp+%
import org.rut.util.algorithm.support.ImprovedMergeSort; ]mO7O+
import org.rut.util.algorithm.support.ImprovedQuickSort; [py/\zkn
import org.rut.util.algorithm.support.InsertSort; @q" #.?>s
import org.rut.util.algorithm.support.MergeSort; ]'i}}/}u2
import org.rut.util.algorithm.support.QuickSort; /LCRi
import org.rut.util.algorithm.support.SelectionSort; HFj@NRE6
import org.rut.util.algorithm.support.ShellSort; QbAEWm
UD]RWN
/** h5H#xoCXp
* @author treeroot 9@p+g`o
* @since 2006-2-2 g7LS
* @version 1.0 7tT L,Nxe
*/ .)=j~}\
public class SortUtil { VelX+|w
public final static int INSERT = 1; l) )Cvre+
public final static int BUBBLE = 2; R^4 j0L
public final static int SELECTION = 3; ( v=Z$#l
public final static int SHELL = 4; |Tl2r,(+R
public final static int QUICK = 5; 6x_D0j%^]
public final static int IMPROVED_QUICK = 6; -v WXL
public final static int MERGE = 7; TbR Ee;1
public final static int IMPROVED_MERGE = 8; ^w}BXVn
public final static int HEAP = 9; UbwD2>
0_map z
public static void sort(int[] data) { z"@UNypc,
sort(data, IMPROVED_QUICK); 8nRxx`U\q
} r?n3v[B
private static String[] name={ *3Ci4\Ew
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @z.HyQ_v
}; 0R?LWm j
,#=;V"~9
private static Sort[] impl=new Sort[]{ 2`/p V0
new InsertSort(), EtvYIfemr
new BubbleSort(), 5./(n7d_
new SelectionSort(), Nj4^G ~_
new ShellSort(), PHn3f;I
new QuickSort(), G`R2=bb8
new ImprovedQuickSort(), AqP7UL
new MergeSort(), XbAoW\D(
new ImprovedMergeSort(), <NX6m|DD
new HeapSort() M$GZK'%
}; Jp`qE
<Okl.Iz>
public static String toString(int algorithm){ w=75?3c7F
return name[algorithm-1]; )eSD5hOI)
} 7(= 09z
K~>ESMZ5
public static void sort(int[] data, int algorithm) { 3/((7O[
impl[algorithm-1].sort(data); < G:G/
} ob.=QQQs
w!^{Q'/,Q
public static interface Sort { PP)-g0^@
public void sort(int[] data); iYxpIqWw
} 5PCKBevV
+q3E>K9a
public static void swap(int[] data, int i, int j) { _"%-=^_
int temp = data; `~3y[j]kO
data = data[j]; rwou[QU
data[j] = temp; sv?Lk4_
} yY42+%P
} |nj,]pA