[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; a1QW0d
} sv#b5,>9
int i1=l; # $'H?lO
int i2=mid+1; 0xaK"\Q
for(int cur=l;cur<=r;cur++){ C0>L<*C
if(i1==mid+1) 8.7lc2aX
data[cur]=temp[i2++]; Mp[2Auf
else if(i2>r) LW9F%?e!>
data[cur]=temp[i1++]; m,}GP^<1i
else if(temp[i1] data[cur]=temp[i1++]; ep*8*GmP
else ^f,%dM=i=
data[cur]=temp[i2++]; k/BlkjlNE
} =Tfm~+7nE
} T`]P5Bk8r
{.e^1qE
} NfmHa
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改进后的归并排序: mMO]l(a&
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package org.rut.util.algorithm.support; 8q:# '
>t%@)]*N
import org.rut.util.algorithm.SortUtil; k<NxI\s8]
@18}'k
/** Dz8aJ6g
* @author treeroot SDs#w
* @since 2006-2-2 )#`&[9d-
* @version 1.0 j[dgY1yE:
*/ upZf&4 I8
public class ImprovedMergeSort implements SortUtil.Sort { e_cK#9+
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private static final int THRESHOLD = 10; 6` Aw!&{
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/* s .+`"rK
* (non-Javadoc) >5D;uTy u
* GR_caP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vF/wV'Kk
*/ ,ne3uPRu7~
public void sort(int[] data) { Zq5~M bldh
int[] temp=new int[data.length]; 'ud[#@2
mergeSort(data,temp,0,data.length-1); SDVnyT
} a>Zp?*9
,,BWWFg~
private void mergeSort(int[] data, int[] temp, int l, int r) { 3e1P!^'\
int i, j, k; IaU%L6Q]
int mid = (l + r) / 2; Z#YNL-x
if (l == r) p+dOw#
return; 81w"*G5AM
if ((mid - l) >= THRESHOLD) aK7}}
mergeSort(data, temp, l, mid); Kx?8HA[5
else {<?8Y
insertSort(data, l, mid - l + 1); %E"Z &_3{
if ((r - mid) > THRESHOLD) 'K#ndCGJ$
mergeSort(data, temp, mid + 1, r); yqB!0) <
else f[ia0w5 m
insertSort(data, mid + 1, r - mid); qdxaP% p2
mkl^2V13~
for (i = l; i <= mid; i++) { u(\O@5a
temp = data; j0s$}FPUI
} m(0X_&&?z
for (j = 1; j <= r - mid; j++) { M}Xf<:g)
temp[r - j + 1] = data[j + mid]; FYK`.>L28
} 5L_`Fw\l
int a = temp[l]; 0N$FIw2
int b = temp[r]; HxcL3Bh$~}
for (i = l, j = r, k = l; k <= r; k++) { ?Dn}
if (a < b) { +'nMy"j1
data[k] = temp[i++]; qI${7
a = temp; d`=LZio
} else { 0%4OmLBT
data[k] = temp[j--]; =|8hG*D8
b = temp[j]; n9n)eI)R
} O%N.;Ve
} P(/eVD#v
} #<EYO
`uH7~ r^
/** }W&9}9p"
* @param data &b7_%,Bx4
* @param l Ez-Q'v(9
* @param i P,9Pn)M|
*/ _l"nwEs
private void insertSort(int[] data, int start, int len) { T[#q0bv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]vP}K
} xu%eg]
} &/WE{W
} >P&1or)e%
} ;{q*
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堆排序： C+[)^2M{
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package org.rut.util.algorithm.support; #sDb611}#
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import org.rut.util.algorithm.SortUtil; M.r7^9P
a^pbBDi W
/** .Y"F3 R
* @author treeroot 7 )rL<+
* @since 2006-2-2 T~(Sc'8
* @version 1.0 3?@6QcHl{
*/ o:fe`#t
public class HeapSort implements SortUtil.Sort{ k)|.<
l`i97P?/W
/* (non-Javadoc) :GO"bsjL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I[d<SHo
*/ M +r!63T
public void sort(int[] data) { (QJe-)0_y
MaxHeap h=new MaxHeap(); 7B (%2
h.init(data); b*M?\ aA
for(int i=0;i h.remove(); Dfa3&##{
System.arraycopy(h.queue,1,data,0,data.length); ]z/R?SM
} lg~7[=%k#
mbGma
private static class MaxHeap{ 2wHbhW[
yxo=eSOM
void init(int[] data){ )<:TpMdUk
this.queue=new int[data.length+1]; ;%B9mM#p~
for(int i=0;i queue[++size]=data; L/V^#$
fixUp(size); Z>Mv$F"p:
} F!wz{i6\h
} <.B+&3')
=@?[.`
private int size=0; +8T^q,
!W9:)5^X
private int[] queue; ]MosiMJF
wz*iwd-
public int get() { &Xqxuy ]J
return queue[1]; h%Nd89//
} J5I@*f)l
voRry6Q;
public void remove() { '2H?c<Y3
SortUtil.swap(queue,1,size--); 9ziFjP+1
fixDown(1); =I@t%Y
} $2?AJ/2r$b
file://fixdown P*OG`%y
private void fixDown(int k) { 7MLLx#U
int j; D3X4@sM
while ((j = k << 1) <= size) { 7RL J
if (j < size %26amp;%26amp; queue[j] j++; `KFEzv
if (queue[k]>queue[j]) file://不用交换 nQjpJ /=
break; -}|L<~
SortUtil.swap(queue,j,k); )hXTgUZa
k = j; +*]$PVAFA
} o8 JOpD
} 3k`Q]O=OU
private void fixUp(int k) { 'bi;Y1:
while (k > 1) { 3SP";3+
int j = k >> 1; <m]0!ii
if (queue[j]>queue[k]) (WyNO QO'
break; ZH_$Q$9
SortUtil.swap(queue,j,k); 0\P5=hD)K
k = j; HcsVq+
} %o0b~R
} h*k V@Dc
hul,Yd) Z
} &v{#yzM
?,>3uD#
} dFy$w=
i/x |c!E
SortUtil： Hd|[>4Z
CUu Owx6%
package org.rut.util.algorithm; &zdS9e-fF
1;ttwF>G7
import org.rut.util.algorithm.support.BubbleSort; ga5Q
import org.rut.util.algorithm.support.HeapSort; im2mA8OH
import org.rut.util.algorithm.support.ImprovedMergeSort; K ze?@*
import org.rut.util.algorithm.support.ImprovedQuickSort; '[ t.
import org.rut.util.algorithm.support.InsertSort; nK1eh@a9Qv
import org.rut.util.algorithm.support.MergeSort; MA`nFkVK
import org.rut.util.algorithm.support.QuickSort; DM^0[3XuV5
import org.rut.util.algorithm.support.SelectionSort; J\L'HIs
import org.rut.util.algorithm.support.ShellSort; i1vz{Tc
yE8D^M|g
/** fEHFlgN3Ap
* @author treeroot K81X32Lm'
* @since 2006-2-2 ]<;7ZNG"Y5
* @version 1.0 tO M$'0u
*/ nR{<xD^
public class SortUtil { 23gN;eD+m6
public final static int INSERT = 1; "cKD#
public final static int BUBBLE = 2; V~*Gk!+f
public final static int SELECTION = 3; IVNH.g'
public final static int SHELL = 4; 7;EDU
public final static int QUICK = 5; 5Z>a}s_i
public final static int IMPROVED_QUICK = 6; *D?=Ts
public final static int MERGE = 7; OcTWq
public final static int IMPROVED_MERGE = 8; >v+1v
public final static int HEAP = 9; U@OdQAX
d%7?913
public static void sort(int[] data) { 9\Jc7[b
sort(data, IMPROVED_QUICK); !mlfG"FE
} J@5iD
private static String[] name={ L7rgkxI7k*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n _K1%
}; @z1QoZ^w
YV.' L
private static Sort[] impl=new Sort[]{ Wk%|%/:
new InsertSort(), )'+[,z ;s
new BubbleSort(), cq I $9
new SelectionSort(), <:9ts@B
new ShellSort(), t"VT['8
new QuickSort(), fd'kv
new ImprovedQuickSort(), OJ&'Z}LB
new MergeSort(), V4,Gt]4
new ImprovedMergeSort(), wn[)/*(,$(
new HeapSort() /a1uG]Mt
}; p1UloG\
NXOXN]=c<
public static String toString(int algorithm){ ]o] VS
return name[algorithm-1]; 4S26TgY
} o/{`\4
VIAq$iu7
public static void sort(int[] data, int algorithm) { IBa0O|*6
impl[algorithm-1].sort(data); _&-d0'+
} >$m<R&
;%n'k
public static interface Sort { +xYu@r%R
public void sort(int[] data); nah?V" ?Y
} Ow;thNN
KU8,8:yY
public static void swap(int[] data, int i, int j) { ]+I9{%zB%8
int temp = data; sC3Vj(d!i
data = data[j]; !ZTghX}D
data[j] = temp; c+FTt(\8.
} [cB^6v
} %6Gg&Y$j!