[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; aIV(&7KT4
} tZlz0BY!
int i1=l; *RugVH4
int i2=mid+1; BgLW!|T[
for(int cur=l;cur<=r;cur++){ '=?IVm#C
if(i1==mid+1) va \5
data[cur]=temp[i2++]; fZU#%b6G
else if(i2>r) +g8wc(<ik
data[cur]=temp[i1++]; HMyw:?
else if(temp[i1] data[cur]=temp[i1++]; ?;!d5Xuu
else H^cB?i
data[cur]=temp[i2++]; <rd7<@>5D
} i$HA@S
} 9 p6QNDp
r|t;#
} t2Dx$vT*&
et|QW;*L
改进后的归并排序: DJ?kQ
ZS51QB
package org.rut.util.algorithm.support; ad^7t<a}<
:7&#ej6
import org.rut.util.algorithm.SortUtil; J [}8&sn
MNURYA=
/** k,o|"9H
* @author treeroot jEr/*kv
* @since 2006-2-2 e%#(:L
* @version 1.0 P?%kV
*/ bp G`,[
public class ImprovedMergeSort implements SortUtil.Sort { b#%s!
~e<l`rg#
private static final int THRESHOLD = 10; 7kmU/(8
$Lpt2:.((
/* kfaRN^
* (non-Javadoc) ^c?2n
* w'[lIEP 2$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (=:9pbP
*/ ax{+7 k
public void sort(int[] data) { ;O=tSEe
int[] temp=new int[data.length]; W=YFe<Q
mergeSort(data,temp,0,data.length-1); %Od?(m"&
} )G$/II9d
i=$##
private void mergeSort(int[] data, int[] temp, int l, int r) { K5-wuD1
int i, j, k; lA[BV7.=7
int mid = (l + r) / 2; M&P?/Zi=L
if (l == r) mY9^W2:
return; `I+G7KK
if ((mid - l) >= THRESHOLD) 3=w$1.B d
mergeSort(data, temp, l, mid); 7\*_/[B
else W]Z;=-CBr
insertSort(data, l, mid - l + 1); ,f0|eu>
if ((r - mid) > THRESHOLD) j'Ry.8}
mergeSort(data, temp, mid + 1, r); g.yr) LHt0
else K3jKOV8
insertSort(data, mid + 1, r - mid); ] h3~>8<
Zcq'u jU
for (i = l; i <= mid; i++) { 7PG&G5
temp = data; J7:VRf|,?(
} l}-JtZ?[?
for (j = 1; j <= r - mid; j++) { p/jC}[$v
temp[r - j + 1] = data[j + mid]; !yAlb#yu
} 0ut/ ')[
int a = temp[l]; ;Awt:jF
int b = temp[r]; ,Bh!|H(?L1
for (i = l, j = r, k = l; k <= r; k++) { G+Ft2/+\
if (a < b) { A:$Qt%c
data[k] = temp[i++]; 5Ug.J{d
a = temp; 5~&9/ALk5
} else { 61e)SIRz9I
data[k] = temp[j--]; PCzC8~t
b = temp[j]; [DS.@97n
} oNHbQ&h
} WW33ZJ
} hl`4_`3y
h}PeXnRU
/** ]?!#*<t r
* @param data R;+vE'&CO
* @param l ??&Q"6Oe
* @param i &2-dZK
*/ &DoYz[q
private void insertSort(int[] data, int start, int len) { !{'C.sb?~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H_gY)m
} ciRn"X=l
} KQ0Zy
} !#l>+9
} AD_RU_a9
+"1@6,M
堆排序： YlfzHeN1
@=CN#D12
package org.rut.util.algorithm.support; = GUgb2TAT
}7p`8?
import org.rut.util.algorithm.SortUtil; ;.$AhjqiP
;hP43Bi
/** d:08@~#
* @author treeroot Zpfsh2`
* @since 2006-2-2 .Cq'D.
* @version 1.0 '1'#,u!
*/ K q;X(&Z
public class HeapSort implements SortUtil.Sort{ v@_}R_pX
D@9adwQb
/* (non-Javadoc) )+;Xfftz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W"j&':xD
*/ JC|j*x(k/
public void sort(int[] data) { W&E?#=*X
MaxHeap h=new MaxHeap(); +T]/4"^M
h.init(data); M7U:UV)
for(int i=0;i h.remove(); BYjEo
System.arraycopy(h.queue,1,data,0,data.length); | Q0Wv8/
} qffVF|7
fmqHWu*wG
private static class MaxHeap{ z%ZAN-
7lQ@I}i
void init(int[] data){ NDsF<2A4
this.queue=new int[data.length+1]; X2CpA;#;7l
for(int i=0;i queue[++size]=data; ~mAv)JK
fixUp(size); vjNP
} jz CA2N%
} 4%k{vo5i
}N@8zB~X
private int size=0; AlZ]UGf^
%UGXgYDz
private int[] queue; `h%(ZG~
Y3%_IwSJ|
public int get() { 62L,/?`B$
return queue[1]; jVA|Vi_2
} {yXpBS
!vd(WKq
public void remove() { b+b].,
SortUtil.swap(queue,1,size--); #8xP,2&zf
fixDown(1); [wp(s2=
} mdzUL d5J
file://fixdown W(~7e?fO
private void fixDown(int k) { be^+X[
int j; -zn$h$N4
while ((j = k << 1) <= size) { *@;Pns]L-
if (j < size %26amp;%26amp; queue[j] j++; [S Jx\Os
if (queue[k]>queue[j]) file://不用交换 {|!> {
break; 2%!yV~Z
SortUtil.swap(queue,j,k); r.WQ6h/eZ5
k = j; Fa]|Y
} `i~kW
} o8uak*"{
private void fixUp(int k) { yLpsK[)}\
while (k > 1) { sVT:1 kI
int j = k >> 1; t4Q&^AC
if (queue[j]>queue[k]) &YiUhK
break; SM?rss.=
SortUtil.swap(queue,j,k); c&>S
k = j; l$1 ]
} 5/w4[d
} 86 $88`/2
O0`o0!=P
} <m"fzT<"
zDD
} H6o_*Y
7{W#i<W
SortUtil： ?WEKRl
$[S)A0O
package org.rut.util.algorithm; gUa-6@
2!kb?
import org.rut.util.algorithm.support.BubbleSort; h^ o@=%b
import org.rut.util.algorithm.support.HeapSort; h#:_GNuF
import org.rut.util.algorithm.support.ImprovedMergeSort; L!| `IK
import org.rut.util.algorithm.support.ImprovedQuickSort; 8'<RPU}M
import org.rut.util.algorithm.support.InsertSort; S{d]0
import org.rut.util.algorithm.support.MergeSort; (T65pP_P 7
import org.rut.util.algorithm.support.QuickSort; ]a=n(`l?
import org.rut.util.algorithm.support.SelectionSort; lGhhH_
import org.rut.util.algorithm.support.ShellSort; DH9p1)L'
_&SST)Y|
/** A>9IE(C_
* @author treeroot >;s!X(6b
* @since 2006-2-2 BV"l;&F[
* @version 1.0 lZ'ZL*
*/ I+GP`=\
public class SortUtil { j|-{*t{/x
public final static int INSERT = 1; s#BSZP
public final static int BUBBLE = 2; As>-9p>v
public final static int SELECTION = 3; r"4&.&6
public final static int SHELL = 4; e'dx Y(
public final static int QUICK = 5; ?B{,%2+
public final static int IMPROVED_QUICK = 6; P*!~Z*"
public final static int MERGE = 7; 9O4\DRe5c
public final static int IMPROVED_MERGE = 8; |s!<vvp]
public final static int HEAP = 9; 16-1&WuY@
Z,_EhEm
public static void sort(int[] data) { Y 8Dn&W
sort(data, IMPROVED_QUICK); nvInq2T1
} ,R$U(,>_0
private static String[] name={ \Dx5=Lh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GeFu_7u!|
}; U-.A+#<IT9
N2uTWT>
private static Sort[] impl=new Sort[]{ |-Q="7b%
new InsertSort(), k*ZYT6Z?
new BubbleSort(), `p#u9M>
new SelectionSort(), Q=u [j|0mc
new ShellSort(), [1Q:
new QuickSort(), AMe_D
new ImprovedQuickSort(), HO}eu
new MergeSort(), v"x'rx#
new ImprovedMergeSort(), F9J9zs*,
new HeapSort() H tx)MEZ
}; p)c"xaTP#F
Ha/Gn!l
public static String toString(int algorithm){ k &6$S9
return name[algorithm-1]; 70F(`;
} ? 4v"y@v
k=
public static void sort(int[] data, int algorithm) { GLiD,QX<
impl[algorithm-1].sort(data); R<Uu(-O-
} y.aeXlc[
LL%s$>c65A
public static interface Sort { m?y'Y`
public void sort(int[] data); lPA:ho/`:
} 3J}/<&wv
zgPUW z X=
public static void swap(int[] data, int i, int j) { }JM02R~I
int temp = data; i*61i0
data = data[j]; lEC91:Jyt
data[j] = temp; )YPut.
} 4"et4Y7
} 9Itj@ps