[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; S]O Hv6
} uf]$@6)
int i1=l; >+8I =S
int i2=mid+1; w[YbL2p
for(int cur=l;cur<=r;cur++){ N)WG~=Gi
if(i1==mid+1) % 6.jh#C
data[cur]=temp[i2++]; RNtA4rC>#
else if(i2>r) Nn1^#kc
data[cur]=temp[i1++]; $VIq)s2az|
else if(temp[i1] data[cur]=temp[i1++]; w8I&:"^7<
else v=-3 ,C
data[cur]=temp[i2++]; @rE)xco
} @ibPL+~-_
} Hd`p_?3]
j)6B^!
} wQB{K3
;XQ lj?:
改进后的归并排序: N==_'`O1Q0
u@u.N2H.%
package org.rut.util.algorithm.support; w1(06A}/
g@VndAp
import org.rut.util.algorithm.SortUtil; 5THS5'
]GKx[F{)
/** Ab<Ok\e5
* @author treeroot r;8z"*
* @since 2006-2-2 lNVAKwW2#
* @version 1.0 \[I .
*/ !H=k7s
public class ImprovedMergeSort implements SortUtil.Sort { |hQ|'VCN
fYM6wYJ
private static final int THRESHOLD = 10; H<7DcwXv
kS#DKo
/* AeCG2!8^0
* (non-Javadoc) slvs oN@
* ,T*_mDVY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ss! 3{VW
*/ (,c?}TP
public void sort(int[] data) { :_,]?n
int[] temp=new int[data.length]; yZ)aKwj%U
mergeSort(data,temp,0,data.length-1); jNG?2/P6&
} #IGoz|m
UAXF64w{
private void mergeSort(int[] data, int[] temp, int l, int r) { KSB_%OI1
int i, j, k; C2=iZ`Z>T
int mid = (l + r) / 2; RzJ}CT
if (l == r) K0RYI69_
return; \M"^Oe{Dy?
if ((mid - l) >= THRESHOLD) :`u&TXsu
mergeSort(data, temp, l, mid); >{qK]xj
else 3 [)s;e
insertSort(data, l, mid - l + 1); 5ZyBP~
if ((r - mid) > THRESHOLD) (GcKaUg8*
mergeSort(data, temp, mid + 1, r); &*]{"^
else :e<`U~8m
insertSort(data, mid + 1, r - mid); mn; 7o~4
:{i$2\DH6
for (i = l; i <= mid; i++) { u ?G\b{$m
temp = data; =Q8H]F
} jFNs=D&(
for (j = 1; j <= r - mid; j++) { g y e(/N+I
temp[r - j + 1] = data[j + mid]; )y/DGSd
} hi3sOK*r;<
int a = temp[l]; NBqV0>vR
int b = temp[r]; zdjM%l);
for (i = l, j = r, k = l; k <= r; k++) { 3q|cZQK!1
if (a < b) { [71#@^ye
data[k] = temp[i++]; `zzKD2y
a = temp; *L;pcg8{
} else { ,P@/=I5
data[k] = temp[j--]; wsJ%* eYf
b = temp[j]; s@ 20#D
} q1TW?\pjb:
} y KYP
} G_^iR-
5@UC c
/** ,u&tB|,W,
* @param data Jny)uo8
* @param l 6@?aVM~
* @param i ]~prR?
*/ oEQ{m5O9
private void insertSort(int[] data, int start, int len) { xMNNXPz(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &}nBenYp
} Xb=2/\}|f
} %kK ][2e
} S$jV|xKB
} ]{,Gf2v;;d
Hbjb7Y?[
堆排序： !EX?m }7
n^iNo
package org.rut.util.algorithm.support; $(@o$%d
g5tjj.
import org.rut.util.algorithm.SortUtil; ^"O{o8l>2
&2io^AP
/** AXl!cgi
* @author treeroot s&dO/}3uR]
* @since 2006-2-2 29Gwv
* @version 1.0 aNE9LAms
*/ yn/?= ?0
public class HeapSort implements SortUtil.Sort{ )-+\M_JK5
c=A(o
/* (non-Javadoc) V#'26@@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bJQ5- *F
*/ 1B)Y;hg6&
public void sort(int[] data) { Iv$:`7|crX
MaxHeap h=new MaxHeap(); K*R)V/B/l
h.init(data); $!YKZ0)B'0
for(int i=0;i h.remove(); 2;r]gT~
System.arraycopy(h.queue,1,data,0,data.length); |SGgy|/a#
} .FIt.XPzv
}P<Qz^sr_
private static class MaxHeap{ Y{B9`Z
P?9nTG
void init(int[] data){ lGdM80f
this.queue=new int[data.length+1]; ]\CU9J|H8
for(int i=0;i queue[++size]=data; <^lJr82
fixUp(size); [YC=d1F5
} /> ^@ O
} !p}`kG
g%`i=s&N%
private int size=0; i 8l./Yt/
G9DJa_]X
private int[] queue; ipG5l
wgCvD
public int get() { F-_%>KJS
return queue[1]; yGU .AM
} S8 :"<B)
W7H&R,
public void remove() { OE_QInb<
SortUtil.swap(queue,1,size--); 41u*w2j
fixDown(1); kmryu=
} h}<0/
file://fixdown J.#(gFBBl\
private void fixDown(int k) { gfi AK%
int j; c\At0.QCA
while ((j = k << 1) <= size) { kr%2w
if (j < size %26amp;%26amp; queue[j] j++; &e5(Djz8t
if (queue[k]>queue[j]) file://不用交换 YRPm^kW
break; pD"YNlB^
SortUtil.swap(queue,j,k); ?a S%
k = j; :z]}ZZ
} *myG"@P4hW
} q#MM
private void fixUp(int k) { + :Vrip
while (k > 1) { Bs[nV}c>>
int j = k >> 1; 7c-Gm R2
if (queue[j]>queue[k]) O`WIkBV!
break; MU'@2c
SortUtil.swap(queue,j,k); ] /+D^6
k = j; ~3gru>qI&
} x[QZ@rGIW
} p~K9 B-D
=+Im*mgNn
} &rp!%]+xAM
mLwoi!]m
} 4[TR0bM%
1~J5uB4
SortUtil： yPV'pT)
5o#Yt
package org.rut.util.algorithm; MM?`voj~`p
ZQ3_y $
import org.rut.util.algorithm.support.BubbleSort; 1j0-9Kg'
import org.rut.util.algorithm.support.HeapSort; q]\X~ 9#
import org.rut.util.algorithm.support.ImprovedMergeSort; ,m^;&&
import org.rut.util.algorithm.support.ImprovedQuickSort; vfcb:x
import org.rut.util.algorithm.support.InsertSort; GMW,*if8p
import org.rut.util.algorithm.support.MergeSort; MAqLIf<G
import org.rut.util.algorithm.support.QuickSort; n,j$D62[
import org.rut.util.algorithm.support.SelectionSort; iEIg:
import org.rut.util.algorithm.support.ShellSort; PmR*}Aw
w\w(U
/** a{SBCy
* @author treeroot u3J?bR
* @since 2006-2-2 |Ps% M|8~
* @version 1.0 @*MC/fe
*/ mM/i^zT
public class SortUtil { Lq (ZcEKo
public final static int INSERT = 1; {_#yz\j
public final static int BUBBLE = 2; 4f^C\i+q
public final static int SELECTION = 3; LO:fJ{ -
public final static int SHELL = 4; TZRcd~5$
public final static int QUICK = 5; 4v'A\~ZU
public final static int IMPROVED_QUICK = 6; K93p"nHN
public final static int MERGE = 7; g~S)aU\:,
public final static int IMPROVED_MERGE = 8; [zkikZy
public final static int HEAP = 9; hWo=;#B*
DJ@|QQ
public static void sort(int[] data) { |3hY6aty
sort(data, IMPROVED_QUICK); xJZ@DR,#
} 7=XL!:P
private static String[] name={ }_ mT l@*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b;GD/UI
}; LN2D
?7MqeR4/E
private static Sort[] impl=new Sort[]{ BZv+H=b
new InsertSort(), BxK^?b[E8
new BubbleSort(), ,`A?!.K$
new SelectionSort(), oslJC$cy'
new ShellSort(), sJ z@7.
new QuickSort(), L,,*gK
new ImprovedQuickSort(), ULH0'@BJ
new MergeSort(), ,Gk}"w
new ImprovedMergeSort(), f~{}zGTM:
new HeapSort() j2l55@
}; p&-'|'![l
qU6nJi+-I
public static String toString(int algorithm){ q.4A(,
return name[algorithm-1]; 3jH\yXj
} >wHxmq8F5<
l`-bFmpA
public static void sort(int[] data, int algorithm) { D}C,![
impl[algorithm-1].sort(data); bI.t<;
} Em 6Qe
`+:.L>5([
public static interface Sort { l7{oi!
public void sort(int[] data); l1U=f]
} ((tv2
qn1255fB
public static void swap(int[] data, int i, int j) { S [h];eM
int temp = data; f h#C' sn
data = data[j]; G$0c'9d*(
data[j] = temp; $;M:TpX
} #GDe08rOw
} cKb)VG^