[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; EP&iG%(k
} 64>E|w
int i1=l; jZS6f*$
int i2=mid+1; $'dJ+@
for(int cur=l;cur<=r;cur++){ _KC)f'Cx
if(i1==mid+1) +4f>njARIb
data[cur]=temp[i2++]; IBb3A
else if(i2>r) 2]5dSXD
data[cur]=temp[i1++]; UvRa7[<y%%
else if(temp[i1] data[cur]=temp[i1++]; YvE$fX=
else ;$l!mv7
data[cur]=temp[i2++]; LEvdPG$)
} id@!kSR
} {o< 4 ^
~"!F&
} T{d7,.:
lZZ4 O(
改进后的归并排序: P!:Y<p{=>
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package org.rut.util.algorithm.support; bEP-I5j1t
@FIR9XJ
import org.rut.util.algorithm.SortUtil; lb5Y$ZC
6tB-
/** <Rob.x3
* @author treeroot a h>k=t8(
* @since 2006-2-2 r<cyxR~
* @version 1.0 ZN-J!e"`
*/ @4Z>;
public class ImprovedMergeSort implements SortUtil.Sort { /lkIbmV
n c:^)G
private static final int THRESHOLD = 10; }"wWSPD
&^FCp'J-
/* U0t/(Jyg
* (non-Javadoc) ,.uu/qV}w
* 1i4KZ"A5+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8:0QIkqk
*/ HE(|x1C)j
public void sort(int[] data) { %/b?T]{
int[] temp=new int[data.length]; BRYhL|d~.
mergeSort(data,temp,0,data.length-1); 01}az~&;35
} H`CDfTy
CdlE"Ye
private void mergeSort(int[] data, int[] temp, int l, int r) { %sP C3L
int i, j, k; N[d*_KN.!
int mid = (l + r) / 2; /cF 6{0XS9
if (l == r) p#hs8xz
return; 4]A2Jl E
if ((mid - l) >= THRESHOLD) c-3AzB#[
mergeSort(data, temp, l, mid); 7)!(0.&
else $UavM|
insertSort(data, l, mid - l + 1); lrB@n?hk
if ((r - mid) > THRESHOLD) \~d|MP}"F:
mergeSort(data, temp, mid + 1, r); I]bqle0M
else I=6\z^:
insertSort(data, mid + 1, r - mid); )9MmL-7K
o0^..f
for (i = l; i <= mid; i++) { 6js94ko[
temp = data; Wk"4mq
} asb-syqU
for (j = 1; j <= r - mid; j++) { akHcN]sa2
temp[r - j + 1] = data[j + mid]; w'z?1M(*
} ewg&DBbN"
int a = temp[l]; 0ohpJh61Q
int b = temp[r]; *gfx'$
for (i = l, j = r, k = l; k <= r; k++) { -hj@^Auf
if (a < b) { _"_ W KlN
data[k] = temp[i++]; E</UmM+ R
a = temp; S%<RV6{aiM
} else { )kR~|Yn<-
data[k] = temp[j--]; *`OgwMr)M
b = temp[j]; T{3C3EE?]
} BlUl5mP}>
} Nl3x BM%
} h\".TySz
x4fl=
/** $Nvt:X_
* @param data x*& OvI/o
* @param l ["|AD,$%
* @param i 6*cG>I.Z
*/ H_KE^1
private void insertSort(int[] data, int start, int len) { ?nJ7lLQA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |@?B%sY
} 8"/5Lh(
} )k@W6N
} l[lUmE
} 3&'ll51t
+6t<FH
堆排序： E;$)Oz
p>4$&-
package org.rut.util.algorithm.support; .WM0x{t/
sKYb&2wJ
import org.rut.util.algorithm.SortUtil; .4Ob?ZS(
?#?[6t
/** #A<|&#hh
* @author treeroot +^tq?PfE
* @since 2006-2-2 e@'rY#:u
* @version 1.0 m<)0XE6w
*/ UH/)4Wg
public class HeapSort implements SortUtil.Sort{ tz0@csXV
Gc2sY 0
/* (non-Javadoc) dd1m~Gm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \hN\px
*/ s\QhCS
public void sort(int[] data) { ` W$
MaxHeap h=new MaxHeap(); fTiqY72h
h.init(data); hNBv|&D#
for(int i=0;i h.remove(); <![tn#_
System.arraycopy(h.queue,1,data,0,data.length); V_f}Y8>e
} #PUvrA2Zl
Uf)?sz
private static class MaxHeap{ dA>=#/"
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void init(int[] data){ hZ2!UW4'
this.queue=new int[data.length+1]; 'teToE<i
for(int i=0;i queue[++size]=data; hZ|*=/3k
fixUp(size); <,p|3p3
} x&9}] E^<
} qS<a5`EA
MMCac6;Aea
private int size=0; $3>k/*=
jqq96hP,
private int[] queue; ,73kh
NIufL }6\
public int get() { 9EzXf+f
return queue[1]; j<H`<S
} Kp?):6
hJY= )
public void remove() { P#-9{T
SortUtil.swap(queue,1,size--); ,jJ&x7ra8
fixDown(1); e! V`cg0
} K6<@DP+/
file://fixdown &!> )EHGV
private void fixDown(int k) { %!%G\nv
int j; (|%YyRaX
while ((j = k << 1) <= size) { \jLn5$OW
if (j < size %26amp;%26amp; queue[j] j++; m<L.H33'
if (queue[k]>queue[j]) file://不用交换 v0euvs
break; gi!{y
SortUtil.swap(queue,j,k); g4USKJ19.
k = j; '>dsROB->
} g]au|$L4
} x+Vp&
private void fixUp(int k) { mU.(aLHW
while (k > 1) { 2eErvfC[
int j = k >> 1; d|5V"U]W;
if (queue[j]>queue[k]) =^ur@E
break; 6 ,jp-`
SortUtil.swap(queue,j,k); Zp'c>ty=
k = j; 4oW6&1
} <=WSX{_D
} P.^%8L
<Stfqa6FJ
} vg@kPuOiO
gC^4K9g
} Q/[|/uNw?
xb/L AlJ
SortUtil： I*cB Ha
#wz1uw[pI!
package org.rut.util.algorithm; c%p7?3Ry
-={Z::}S"
import org.rut.util.algorithm.support.BubbleSort; (!kd9uV
import org.rut.util.algorithm.support.HeapSort; DY2r6bcn`
import org.rut.util.algorithm.support.ImprovedMergeSort; U$CAA5HV]
import org.rut.util.algorithm.support.ImprovedQuickSort; Qw>ftle
import org.rut.util.algorithm.support.InsertSort; W vh3Y,|3
import org.rut.util.algorithm.support.MergeSort; N7%iz+
import org.rut.util.algorithm.support.QuickSort; cp@(y$
import org.rut.util.algorithm.support.SelectionSort; . ] =$((
import org.rut.util.algorithm.support.ShellSort; !OwRx5
T}DP35dBzE
/** e}|UVoeH
* @author treeroot +#qW 0g
* @since 2006-2-2 j2GO ZKy
* @version 1.0 a/d'(]
*/ QLNQE6-
public class SortUtil { 5Fh?YS=
public final static int INSERT = 1; O'tVZ!C#J
public final static int BUBBLE = 2; CX](^yU_
public final static int SELECTION = 3; Y=RdxCCx4
public final static int SHELL = 4; cEkf9:_La
public final static int QUICK = 5; cYBv}ylw}R
public final static int IMPROVED_QUICK = 6; Y@)iPK@z
public final static int MERGE = 7; )b<-=VR
public final static int IMPROVED_MERGE = 8; vZEeb j
public final static int HEAP = 9; ,E&PIbDL1
K$>C*?R
public static void sort(int[] data) { oK cgP
sort(data, IMPROVED_QUICK); k-;%/:Om
} 4VtI8f!
private static String[] name={ 5nq0#0Oc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7:fC,2+
}; CV/ei,=9
+T}:GBwD7
private static Sort[] impl=new Sort[]{ CiE
new InsertSort(), T KpX]H`
new BubbleSort(), <b0;Nf
new SelectionSort(), {XC1B
new ShellSort(), #=)(t${7'
new QuickSort(), G8}w|'0m
new ImprovedQuickSort(), eow6{CD8
new MergeSort(), unE h
new ImprovedMergeSort(), r>fx55dw
new HeapSort() >;@ _TAF
}; W,</
6nxX~k
public static String toString(int algorithm){ H,r>@Y
return name[algorithm-1]; :1Jg;G
} V!!E)I
[%U(l<
public static void sort(int[] data, int algorithm) { <5qXC.{Cyp
impl[algorithm-1].sort(data); 3QL I|VpO
} asT*Z"/Q!
U=_O*n?N-d
public static interface Sort { b!W!Vvf^x
public void sort(int[] data); #]nH$Kq
} l7G&[\~
i7h!,vaK
public static void swap(int[] data, int i, int j) { F?b5!<5
int temp = data; NYwE=b~I
data = data[j]; fVCpG~&t
data[j] = temp; ]Lg$p
} ya7/&Z )0
} g70B22!y