[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; xE^G*<mj:
} vcp{Gf|^
int i1=l; ~OPBZ#
int i2=mid+1; Y;huTZ
for(int cur=l;cur<=r;cur++){ <HN+pi
if(i1==mid+1) a=A12<
data[cur]=temp[i2++]; pI8z.JD
else if(i2>r) ]Sa#g&}T>
data[cur]=temp[i1++]; 8]`s&d@GY
else if(temp[i1] data[cur]=temp[i1++]; GIcq|Pe
else yUpN`;
data[cur]=temp[i2++]; -s`Wd4AP
} a3\~AO H%
} ,IqE<i!U
!&g_hmnIF
} ,pdzi9@=t
&y=OZ !M
改进后的归并排序: `Ds=a`^b
mI4GBp
package org.rut.util.algorithm.support; kc P ZIP:
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import org.rut.util.algorithm.SortUtil; 8~R.iqLoX
e@0|fB%2
/** knG:6tQ
* @author treeroot Q[K$f%>
* @since 2006-2-2 3ej237~F,L
* @version 1.0 ]GY8f3~|{
*/ ~/-SKGzo-
public class ImprovedMergeSort implements SortUtil.Sort { ;nW;M 4{
R3lZ|rxv:
private static final int THRESHOLD = 10; ecz-jZ! `
Y,Z$U| U
/* stUv!
* (non-Javadoc) xW5`.^5
* [m h>N$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YtSYe%
*/ |gP)lR
public void sort(int[] data) { *P/A&"i[E
int[] temp=new int[data.length]; l9=Ka{$^*
mergeSort(data,temp,0,data.length-1); S|k@D2k=
} 9ck"JMla
VV/T)qEe7>
private void mergeSort(int[] data, int[] temp, int l, int r) { .[]S!@+%
int i, j, k; P[q>;Fx*
int mid = (l + r) / 2; ArAe=m!u
if (l == r) JvW7h(u7g
return; ~(XaXu
if ((mid - l) >= THRESHOLD) \EoE/2"<
mergeSort(data, temp, l, mid); BF gxa#De
else nKr'cb
insertSort(data, l, mid - l + 1); .u#Hg'oP
if ((r - mid) > THRESHOLD) ; I-6H5
mergeSort(data, temp, mid + 1, r); T5ky:{Y(
else R$ +RTG:E
insertSort(data, mid + 1, r - mid); ojf6@p_
<5pNFj}0;X
for (i = l; i <= mid; i++) { Tr:@Dv.O
temp = data; oYf+I
} a BMV6'
for (j = 1; j <= r - mid; j++) { S$fS|N3]%
temp[r - j + 1] = data[j + mid]; jFe8s@7
} vvxD}p=y
int a = temp[l]; Lv/}&'\(
int b = temp[r]; u;rmqo1
for (i = l, j = r, k = l; k <= r; k++) { 5~DKx7P!Z
if (a < b) { L3wj vq^
data[k] = temp[i++]; ]oSx]R>{f
a = temp; YQd($
} else { fcF|m5
data[k] = temp[j--]; NJr)f
b = temp[j]; S>(xx"Ia
} FO^6c
} Oi:Hs
} uIO,9> ee
[j@i^B &
/** zzI,iEG
* @param data 9M9Fif.
* @param l F#<:ZByjJ@
* @param i 2D"my]FnF
*/ `V V>AA5
private void insertSort(int[] data, int start, int len) { M$ieM[_T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *'aJO}$
} +,)k@OI
} ll$mRC
} uuFQTx))
} &ot^+uVH
<>n|_6'$90
堆排序： 7ixG{yu
kDmuj>D
package org.rut.util.algorithm.support; vqf}(/.D
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import org.rut.util.algorithm.SortUtil; [3-u7Fx!
.Er+*j;&w
/** 1/:vFX
* @author treeroot 6-"tQ,AZ
* @since 2006-2-2 diM*jN#
* @version 1.0 s-WZ3g
*/ jJ<&!=
public class HeapSort implements SortUtil.Sort{ '\8YH+%It
[Ca''JqrA
/* (non-Javadoc) l6WEx -d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DU"Gz!X]Jd
*/ |iBf6smF
public void sort(int[] data) { F{ vT^/
MaxHeap h=new MaxHeap(); Y&=DjKoVh
h.init(data); a9NuYYr,h
for(int i=0;i h.remove(); <BBzv-?D
System.arraycopy(h.queue,1,data,0,data.length); +0ukLc@
} .{8[o[w =
~$4(|Fq/
private static class MaxHeap{ P(8Yz W
_7:Bxx4B
void init(int[] data){ dPpQCxf
this.queue=new int[data.length+1]; ~x'8T!M{
for(int i=0;i queue[++size]=data; b&h'>(
fixUp(size); ]=-=D9ZS3
} [Fag\/Y+
} 8(K:2
,R-k]^O
private int size=0; xu-bn
mk~CE
private int[] queue; L6nsVL&
F^Jz
public int get() { k^K76mB
return queue[1]; cL4Go,)w
} @YaI5>,/
pd:YR;
public void remove() { AG vhSd7
SortUtil.swap(queue,1,size--); vYXhWqL~
fixDown(1); td\gk
} 8lqmd1v
file://fixdown 6 A]a@,PC
private void fixDown(int k) { 3*%+NQIj
int j; RfvvX$
while ((j = k << 1) <= size) { #X*);cn
if (j < size %26amp;%26amp; queue[j] j++; ^hZ0"c
if (queue[k]>queue[j]) file://不用交换 1nvT={'R
break; [Pp#r&4H
SortUtil.swap(queue,j,k); *!`&+w
k = j; +[n#{;]<
} v.:Q& ]
} `/R. 5;$|
private void fixUp(int k) { Pr%KcR ;
while (k > 1) { "-Nyf
int j = k >> 1; ; Gv-$0{P3
if (queue[j]>queue[k]) g6DIWMoO=h
break; gk8v{'0Er
SortUtil.swap(queue,j,k); 7vPGb:y
k = j; 8|i<4>
} c%b|+4 }x
} 7],y(:[=v
P;gd!Yl<-
} {*hGe_^
{y@8E>y5$
} _hJ+8B^`
OC,yLQ
SortUtil： 94 6r#`q
e"sv_$*
package org.rut.util.algorithm; #;8VBbc\^
>HwVP.~HN
import org.rut.util.algorithm.support.BubbleSort; d<=!*#q;o
import org.rut.util.algorithm.support.HeapSort; 3My}u>
import org.rut.util.algorithm.support.ImprovedMergeSort; wt@TR~a
import org.rut.util.algorithm.support.ImprovedQuickSort; [N[4\W!!
import org.rut.util.algorithm.support.InsertSort; 0lq?l:/
import org.rut.util.algorithm.support.MergeSort; Bo ywgL|
import org.rut.util.algorithm.support.QuickSort; 6f#Mi+"
import org.rut.util.algorithm.support.SelectionSort; MoiRAO
import org.rut.util.algorithm.support.ShellSort; GYJ j$'
&y73^"%
/** ia /#`#.
* @author treeroot QjpJIw
* @since 2006-2-2 "BpDlTYM
* @version 1.0 "#8^":,4
*/ oLlfqV,|L\
public class SortUtil { oGeV!hD
public final static int INSERT = 1; s`,g4ce`
public final static int BUBBLE = 2; r_bG+iw7p
public final static int SELECTION = 3; >N`, 3;Z
public final static int SHELL = 4; 4C:dkaDq]
public final static int QUICK = 5; {4[dHfIy
public final static int IMPROVED_QUICK = 6; +W-b3R:1>
public final static int MERGE = 7; z8D,[`
public final static int IMPROVED_MERGE = 8; I)*J,hs1
public final static int HEAP = 9; =:R${F
dYwEVu6q
public static void sort(int[] data) { 9~K>c
sort(data, IMPROVED_QUICK); U/v)6:j)4R
} %M^Q{` :5
private static String[] name={ Ym -U{a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =/ !A
}; 0@u{(m
~_ovQ4@
private static Sort[] impl=new Sort[]{ Ft:_6T%
new InsertSort(), :m'(8s8
new BubbleSort(), Bv*VNfUm
new SelectionSort(), %%wngiz\
new ShellSort(), nddCp~NX
new QuickSort(), qM^y@B2MO
new ImprovedQuickSort(), RJT55Rv{
new MergeSort(), m^/>C-&C
new ImprovedMergeSort(), *z~J ]
new HeapSort() 4 #lLC-k
}; y^{4}^u-^
\j we
public static String toString(int algorithm){ 0U.Ld:
return name[algorithm-1]; @JP6F[d
} 5*B'e{C
^ 6t"A
public static void sort(int[] data, int algorithm) { Cf<TDjU`|
impl[algorithm-1].sort(data); xw1,Wbu]
} EW)r/Av:,
kAxJ#RG
public static interface Sort { OWYY2&.h
public void sort(int[] data); dj6Lf
} fl_a@QdB#
'P&r^V\~(/
public static void swap(int[] data, int i, int j) { mII8jyg*c
int temp = data; \naG
data = data[j]; :2{ [f+
data[j] = temp; V*6&GM&
} 98{n6$\
} GapH^trm