[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; ;Vg^!]LL#
} 1EVfowIl
int i1=l; ^>C11v
int i2=mid+1; I*EJHBsQ5
for(int cur=l;cur<=r;cur++){ Q,{^S,s<
if(i1==mid+1) RFw(]o,9cR
data[cur]=temp[i2++]; Z&_y0W=t
else if(i2>r) PK_s#uC
data[cur]=temp[i1++]; otO j^xU
else if(temp[i1] data[cur]=temp[i1++]; qAoAUDm
else 'T\dkSJv;V
data[cur]=temp[i2++]; B[r<m J
} vxZg &SRK
} > 2#%$lX6
'"y}#h__T
} Yc^%zxub
}91*4@B7
改进后的归并排序: 3gAR4
xq}-m!nX
package org.rut.util.algorithm.support; \[yr=X
j&5G\6:
import org.rut.util.algorithm.SortUtil; >c<pDNt?
+R!zs
/** ~g6"'Cya?k
* @author treeroot e}c&LDgU
* @since 2006-2-2 `ncNEHh7K
* @version 1.0 \)OEBN`9#
*/ !xu9+{-
public class ImprovedMergeSort implements SortUtil.Sort { jpRBER_X
*i^`Dw^~y
private static final int THRESHOLD = 10; h4_b!E@
[)^mBVht
/* GF8 -_X
* (non-Javadoc) sYJL-2JX
* C5|db{=\.*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <47k@Ym
*/ 7h%4]
public void sort(int[] data) { *m9{V8Yi2
int[] temp=new int[data.length]; LN4qYp6)G
mergeSort(data,temp,0,data.length-1); hoenQ6N^:
} XVt/qb%)r
8-m 3e
private void mergeSort(int[] data, int[] temp, int l, int r) { K/txD20 O|
int i, j, k; LXj5R99S
int mid = (l + r) / 2; 8$0\J_
if (l == r) jNA1O68N
return; |~WYEh
if ((mid - l) >= THRESHOLD) UUeB;'E+
mergeSort(data, temp, l, mid); /@hJpz|+
else )tS-.PrA-
insertSort(data, l, mid - l + 1); WK0C
if ((r - mid) > THRESHOLD) t V03+&jF
mergeSort(data, temp, mid + 1, r); kZLMtj-
else 4U=75!>
insertSort(data, mid + 1, r - mid); Z<U>A
]ab#q=
for (i = l; i <= mid; i++) { XM/vDdR
temp = data; Tkw;pb
} LH2PTW\b!6
for (j = 1; j <= r - mid; j++) { }u%"$[I}
temp[r - j + 1] = data[j + mid]; /)EY2Y'
} EF#QH _X
int a = temp[l]; 87V1#U^
int b = temp[r]; UL( lf}M
for (i = l, j = r, k = l; k <= r; k++) { j?6X1cMq
if (a < b) { 2C$R4:Ssw)
data[k] = temp[i++]; ?P/AC$:|I
a = temp; 6BocGo({
} else { tu0aD%C
data[k] = temp[j--]; \}5p0.=
b = temp[j]; d,0 }VaY=D
} JN4fPGbV
} {^}0 G^
} ]E3<UR
.$!{-v[
/** eS'yGY0b
* @param data fKHE;A*>%
* @param l GaekFbW)
* @param i y<- _(^
*/ S QY"OBo<e
private void insertSort(int[] data, int start, int len) { t P"\J(x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u,1}h L
} ibpzeuUl
} ~6aCfbu%V
} L?5f+@0.
} "Pz}@=
4-R^/A0
堆排序： N@xg:xr
JWv{=_2w
package org.rut.util.algorithm.support; J~#$J&iKh
>?lOE -}^
import org.rut.util.algorithm.SortUtil; qQ0C?
uuNR?1fS
/** VsK>6S\T
* @author treeroot 80pid[F
* @since 2006-2-2 F'JY?
* @version 1.0 eq[Et +
*/ &QNY,Pj
public class HeapSort implements SortUtil.Sort{ aG+j9Q_
l"(6]Z 4
/* (non-Javadoc) e`K)_>^n#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zg~nlO2
*/ ]m4OIst
public void sort(int[] data) { $t~@xCi]S
MaxHeap h=new MaxHeap(); l[GOs&D1
h.init(data); jS.g]k
for(int i=0;i h.remove(); \ %=9
System.arraycopy(h.queue,1,data,0,data.length); F {+`uG
} r?/A?DMe
TUIk$U?/I
private static class MaxHeap{ 1f'Hif*r_X
Wg`AZ=t
void init(int[] data){ I$t3qd{H&
this.queue=new int[data.length+1]; _>m-AI4^
for(int i=0;i queue[++size]=data; 44ed79ly0)
fixUp(size); q.#[TI ^
} ccFn.($p?,
} .w?(NZ2~
D*PYr{z'
private int size=0; O81X;JdP3
errH>D~
private int[] queue; &fC!(Oy
Ih}1%Jq
public int get() { pd[ncL
return queue[1]; LQYy;<K
} fvq,,@23
OZY,@c
public void remove() { v``-F(i$
SortUtil.swap(queue,1,size--); )E#2J$TD
fixDown(1); =sJ _yq0#R
} [,RI-#n
file://fixdown {c?JuV4q?
private void fixDown(int k) { lbdTQ6R
int j; H9)m^*
while ((j = k << 1) <= size) { "syh=BC v
if (j < size %26amp;%26amp; queue[j] j++; p?D2)(
if (queue[k]>queue[j]) file://不用交换 <*!i$(gn
break; A- YBQPE
SortUtil.swap(queue,j,k); *^\HU=&
k = j; X~=xXN.
} ltB.Q
} uMb>xxf
private void fixUp(int k) { WEg6Kz
while (k > 1) { m([(:.X/IX
int j = k >> 1; $rF=_D6
if (queue[j]>queue[k]) eN?Y7
break; TL$EV>Nr
SortUtil.swap(queue,j,k); D4Al3fe
k = j; `;|5
} ^9OUzTF
} >_dx_<75&
.nu @ o40
} T<3BT
TGXa,A{
} B vo5-P6XY
>(w2GD?
SortUtil： `afIYXP
U[L9*=P;
package org.rut.util.algorithm; VGHWNMT
s>k Uh
import org.rut.util.algorithm.support.BubbleSort; 7|\@zQ h
import org.rut.util.algorithm.support.HeapSort; Ji1Pz)fq
import org.rut.util.algorithm.support.ImprovedMergeSort; Ho DVn/lr
import org.rut.util.algorithm.support.ImprovedQuickSort; u] :m"LM
import org.rut.util.algorithm.support.InsertSort; }8|[;Qa`y
import org.rut.util.algorithm.support.MergeSort; /={Js*
import org.rut.util.algorithm.support.QuickSort; j*"3t^|-
import org.rut.util.algorithm.support.SelectionSort; D4eTTfQ
import org.rut.util.algorithm.support.ShellSort; tWTKgbj(
'i;|c
/** /-bF$)vN
* @author treeroot ^D^4 YJz
* @since 2006-2-2 -K,-h[o
* @version 1.0 ]<(]u#g_d
*/ Y2B&go
public class SortUtil { _lzyMEdr
public final static int INSERT = 1; bNFLO Q
public final static int BUBBLE = 2; taGU
public final static int SELECTION = 3; G22NQ~w8
public final static int SHELL = 4; Pq*s{
public final static int QUICK = 5; V.ht, ~l
public final static int IMPROVED_QUICK = 6; @`tXKP$so
public final static int MERGE = 7; {oc igR0
public final static int IMPROVED_MERGE = 8; E$9Ys
public final static int HEAP = 9; t?o,RN:
b|Q)[y]
public static void sort(int[] data) { QB.J,o*XD4
sort(data, IMPROVED_QUICK); CQel3Jtt.
} du$|lxC
private static String[] name={ W$U0[^1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RLlU" sw+{
}; J q{7R
*k"|i*{
private static Sort[] impl=new Sort[]{ L %ip>
new InsertSort(), ReiB $y6
new BubbleSort(), h)~=Dm
new SelectionSort(), Qk!;M|
new ShellSort(), +`7KSwa
new QuickSort(), xq6cKtSv
new ImprovedQuickSort(), ,+`61J3W
new MergeSort(), &g2 Eptx#
new ImprovedMergeSort(), G}5#l
new HeapSort() M"%Q&o/I
}; zR!o{8
s9dO,FMs0t
public static String toString(int algorithm){ i)#:qAtP*
return name[algorithm-1]; m}>F<;hQ
} ^F?&|clM/
1qV@qz
public static void sort(int[] data, int algorithm) { ^[%%r3"$C
impl[algorithm-1].sort(data); V8eB$in
} S'oGt&Z<
Z/rP"|EuQ
public static interface Sort { 1B),A~Ip
public void sort(int[] data); tXJUvish
} BCe_@
G'YH6x,
public static void swap(int[] data, int i, int j) { VG/3xR&y
int temp = data; UhIDRR
data = data[j]; K)TrZ 2
data[j] = temp; ~|wbP6</:-
} #:T-hRu
} \{Q?^E