[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; kdm@1x
} 7sJGB^vM
int i1=l; n{F&GE="
int i2=mid+1; ^[ >
for(int cur=l;cur<=r;cur++){ 0?g&<q
if(i1==mid+1) Sj'.)nz>
data[cur]=temp[i2++]; T6rjtq
else if(i2>r) 49#?I:l
data[cur]=temp[i1++]; X0m6<q
else if(temp[i1] data[cur]=temp[i1++]; wB*}XJah
else M<)Vtn
data[cur]=temp[i2++]; IC.R4-
} 6}mSA@4&
} 6<Zk%[7t
kL}*,8s{
} YP}r15P
#fe zUU
改进后的归并排序: 52Q~` t7F
Fo| rRI2
package org.rut.util.algorithm.support; k:E+]5
Bk4|ik}
import org.rut.util.algorithm.SortUtil; |fWR[\NU
QtqE&j
/** 2Y9@[
* @author treeroot SL% Ec%9Y
* @since 2006-2-2 h6gtO$A|p=
* @version 1.0 }Mh`j$
*/ *7/MeE6)i
public class ImprovedMergeSort implements SortUtil.Sort { I#t#%!InH
[%7oq;^J
private static final int THRESHOLD = 10; ) ]]PhGX~
~M J3-<I
/* P?U}@U~9
* (non-Javadoc) oMZ|)(7C
* oO,"B8a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w259':
*/ & MfnH
public void sort(int[] data) { P0szY"}
int[] temp=new int[data.length]; QcDtZg\
mergeSort(data,temp,0,data.length-1); }2_i<4,L
} y +c 3#
F|W(_llfM
private void mergeSort(int[] data, int[] temp, int l, int r) { :j!N7c{
int i, j, k; 4}=Z+tDu>
int mid = (l + r) / 2; d[Rs
if (l == r) rexy*Xv`2p
return; GI*2*m!u
if ((mid - l) >= THRESHOLD) gNo}\ lm4V
mergeSort(data, temp, l, mid); V_7QWIdiy>
else _M}}H3
insertSort(data, l, mid - l + 1); |/p2DU2
if ((r - mid) > THRESHOLD) '4d+!%2t
mergeSort(data, temp, mid + 1, r); q1o)l
else \wo'XF3:
insertSort(data, mid + 1, r - mid); IDv|i.q3
r*s)T`T}}
for (i = l; i <= mid; i++) { #_OrS/H
temp = data; lw 9rf4RF
} cY\"{o"C
for (j = 1; j <= r - mid; j++) { i/WiSwh:
temp[r - j + 1] = data[j + mid]; 8Ow0A
} XB-l[4?
int a = temp[l]; _:,U$W
int b = temp[r]; ;*EPAC+
for (i = l, j = r, k = l; k <= r; k++) { z}m)u
if (a < b) { o.H(&ex|
data[k] = temp[i++]; oT27BK26?h
a = temp; p=U5qM.O
} else { :Qra9; Y
data[k] = temp[j--]; Nl`8Kcv
b = temp[j]; E; Z1HF R
} ~,.}@XlgT.
} VN9C@ ;'$
} /SZg34%
'xY@I`x
/** Arb-,[kwN
* @param data KFMEY\6\h
* @param l J~vK`+Zs
* @param i !>5!Fb=Sy
*/ Enj],I
private void insertSort(int[] data, int start, int len) { )Dq/fW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :.M"M$MRp8
} KUqD<Jj?
} HNtl>H
} ?rn#S8nNx<
} y7CrH=^jc
}PDNW
堆排序： 0if~qGm=!
PXYo@^ 3
package org.rut.util.algorithm.support; _~E&?zR2>"
w oSI 2i
import org.rut.util.algorithm.SortUtil; RI%ZT
_mw(~r8R
/** %,M(-G5j;
* @author treeroot WSW,}tFp"
* @since 2006-2-2 m^)h/s0A
* @version 1.0 %v(\;&@
*/ (7g1eEK%
public class HeapSort implements SortUtil.Sort{ c);(+b
aBLE:v
/* (non-Javadoc) qrmJJSJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b 64~Y|8
*/ l1qWl
public void sort(int[] data) { =,=tSp
MaxHeap h=new MaxHeap(); y$e'-v
h.init(data); G_] (7
for(int i=0;i h.remove(); j.@TPf*
System.arraycopy(h.queue,1,data,0,data.length); woqP&8a
} wz P")}[0
lU<n Wf
private static class MaxHeap{ `n!<h,S'2
#Mz N7
void init(int[] data){ w<]Wg^dyQ
this.queue=new int[data.length+1]; 8HyK;+ZkVd
for(int i=0;i queue[++size]=data; ei8OLcw:x
fixUp(size); 85fBKpEe
} wb }W;C@
} x-_!I>l&
kOGpe'bV
private int size=0; _YH)E^If
P:")Qb2
private int[] queue; {AY`\G
v*nX
public int get() { E30VKh |
return queue[1]; J!:ss
} Iz#h:O
(Js'(tBhiU
public void remove() { r$*p
SortUtil.swap(queue,1,size--); %HJ_0qg
fixDown(1); N*Owfr1N
} WJ+<&6W8
file://fixdown EK^ld!g(
private void fixDown(int k) { N(]>(S o
int j; m*BtD-{
while ((j = k << 1) <= size) { B%L0g.D"
if (j < size %26amp;%26amp; queue[j] j++; *}\!&Zk"
if (queue[k]>queue[j]) file://不用交换 [lsr[`SJ<
break; q lL6wzq,
SortUtil.swap(queue,j,k); Iky'x[p,D
k = j; ,!f*OWnZ
} vTD`Ja#h
} G!54 e
private void fixUp(int k) { a"{tqNc
while (k > 1) { ?hS n)
int j = k >> 1; m#'2 3
if (queue[j]>queue[k]) o(. PxcD
break; JeJc(e
SortUtil.swap(queue,j,k); 7K`A2
k = j; L44-: 3
} ]OoqU-q
} !m$OI:rr
l|fOi A*K
} ^z$-NSlI
MS6^= ["
} @>J4K#"
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SortUtil： Rp)82- .
m&OzT~?_>N
package org.rut.util.algorithm; IN!m
M[0@3"}}
import org.rut.util.algorithm.support.BubbleSort; w*ig[{ I
import org.rut.util.algorithm.support.HeapSort; Got5(^'c
import org.rut.util.algorithm.support.ImprovedMergeSort; YXJjqH3
import org.rut.util.algorithm.support.ImprovedQuickSort; 'hL\xf{
import org.rut.util.algorithm.support.InsertSort; p3*}!ez4
import org.rut.util.algorithm.support.MergeSort; S2"p(
import org.rut.util.algorithm.support.QuickSort; laqW {sX^5
import org.rut.util.algorithm.support.SelectionSort; X+{4,?04+
import org.rut.util.algorithm.support.ShellSort; cT8jG,+"}
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/** Rtn.cSd
* @author treeroot /r|^Dc Nx
* @since 2006-2-2 6tM CpSJ
* @version 1.0 zQ}:_
*/ K ^1bR(a
public class SortUtil { _EOQ*K#=Ct
public final static int INSERT = 1; 9q;\;-
public final static int BUBBLE = 2; @7%nMTZ@&v
public final static int SELECTION = 3; vcAs!ls+
public final static int SHELL = 4; k@AOE0m
public final static int QUICK = 5; R\+p`n$
public final static int IMPROVED_QUICK = 6; Nl7"|()e
public final static int MERGE = 7; 8@!/%"Kt2
public final static int IMPROVED_MERGE = 8; b:>(U.
public final static int HEAP = 9; z@$7T:H>
O'" &9
public static void sort(int[] data) { |-I[{"6q$@
sort(data, IMPROVED_QUICK); Y*0%lq({H
} B5!$5Qc
private static String[] name={ 4)iSz>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bzmT.!
}; Fy<dk}@
koC2bX
private static Sort[] impl=new Sort[]{ ~xu<xy@E
new InsertSort(), 5 %q26&
new BubbleSort(), w1aa5-aF
new SelectionSort(), cp2e,%o
new ShellSort(), zHr1FxD
new QuickSort(), 6d,jR[JP
new ImprovedQuickSort(), bxO8q57
new MergeSort(), 2<yE3:VX
new ImprovedMergeSort(), C]-Z+9Vvv
new HeapSort() OUe@U;l{Z
}; Rw*l#cr=.
&D uvy#J
public static String toString(int algorithm){ IyYC).wU}
return name[algorithm-1]; T<DQi
} by&#g
1Af~6jz
public static void sort(int[] data, int algorithm) { C2,,+* v
impl[algorithm-1].sort(data); @Wy>4B^
} T?)?"b\qz
:=^JHE{
public static interface Sort { %?_pSH}$!
public void sort(int[] data); ;&P%A<[`
} JMw1qPJQ
r<Ll>R
public static void swap(int[] data, int i, int j) { xe|o(!(
int temp = data; wCvtw[6
data = data[j]; y_38;8ex
data[j] = temp; YQiTx)_
} VLc=!W}
} mTW0_!.