[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; e4fh<0gX
} z\]]d?d?;
int i1=l; 7y5`YJ}!
int i2=mid+1; :XC~G&HuF6
for(int cur=l;cur<=r;cur++){ Cvry8B
if(i1==mid+1) p[2`H$A
data[cur]=temp[i2++]; F0qpJM,
else if(i2>r) y'(( tBWa!
data[cur]=temp[i1++]; ;.Zgt8/.
else if(temp[i1] data[cur]=temp[i1++]; "oz : & #+
else l+HmG< P
data[cur]=temp[i2++]; +DmfqKKbd
} 6!sC
} JfGU3d*c
xAbx.\
} 1YV ;pEw3w
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改进后的归并排序: wj!YYBH
A=JPmsj.
package org.rut.util.algorithm.support; Hb55RilC
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import org.rut.util.algorithm.SortUtil; -N $4\yp
:[xFp}w{
/** uH="l.u
* @author treeroot }$iKz*nx|
* @since 2006-2-2 ?l/VCEZP
* @version 1.0 lHerEv<ja
*/ O?L6Ues
public class ImprovedMergeSort implements SortUtil.Sort { L{1MyR7`I+
q4=Gj`\43
private static final int THRESHOLD = 10; *eL&fC
@rI+.X
/* "A\h+q-
* (non-Javadoc) @( p9}
* K~Nx;{{d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6l]jmj)/
*/ +-~8t^
public void sort(int[] data) { 1[p6v4qO{
int[] temp=new int[data.length]; Nk?eVJ)
mergeSort(data,temp,0,data.length-1); sB`.G
} e}>3<Dh
RT`.S uN
private void mergeSort(int[] data, int[] temp, int l, int r) { 0"}qND
int i, j, k; dyWj+N5(
int mid = (l + r) / 2; q>|&u
if (l == r) "QSmxr
return; " b3-'/&
if ((mid - l) >= THRESHOLD) WN#S%G:Q)
mergeSort(data, temp, l, mid); U/}YpLgdD
else 0OCmyy
insertSort(data, l, mid - l + 1); PtsQV!
if ((r - mid) > THRESHOLD) RGEgYOO
mergeSort(data, temp, mid + 1, r); 7}#zF]vHNi
else (%~^Kmfb0
insertSort(data, mid + 1, r - mid); $ /`X7a{
3fGL(5|_
for (i = l; i <= mid; i++) { !aQb Kp
temp = data; AS4mJ UU9
} 4}4cA\B:n
for (j = 1; j <= r - mid; j++) { tE'^O< K
temp[r - j + 1] = data[j + mid]; #mKF)W
} sbv2*fno5
int a = temp[l]; OFe-e(c1
int b = temp[r]; @*e5(@R
for (i = l, j = r, k = l; k <= r; k++) { =$mPReA3v
if (a < b) { EDAtC
data[k] = temp[i++]; Jlp nR#@
a = temp; Sf*1Z~P|
} else { V#X#rDfJZ
data[k] = temp[j--]; .n[;H;
b = temp[j]; bT>MZK8b
} aAKwC01?
} 6|uv+$
} 6}l[%8
s!<RWy+
/** QjOO^6Fh
* @param data QL]e<2oPJ
* @param l jQBL8<
* @param i H#Hhi<2
*/ iX%9$Bft<
private void insertSort(int[] data, int start, int len) { 7f] qCZ<0V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dJv2tVm&'
} ?}RPnf
} +>3jMs~&
} [s4|+
} tn{YIp
:a/l9 m(
堆排序： ONVhB
y%Rq6P=4Q
package org.rut.util.algorithm.support; Ie4\d2tQ;
wKU9I[]
import org.rut.util.algorithm.SortUtil; mF:Pplf<
=U7P\sw2
/** %u}#|+8}
* @author treeroot -*A1[Z ?
* @since 2006-2-2 -w"$[XP
* @version 1.0 4mjlat(d
*/ UpaF>,kM
public class HeapSort implements SortUtil.Sort{ sZx`u+
'B:8tv
/* (non-Javadoc) (/7b8)g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .(RZ&*4
*/ .0YcB
public void sort(int[] data) { a8$4
MaxHeap h=new MaxHeap(); NX4G;+6
h.init(data); c=,HLHpFO(
for(int i=0;i h.remove(); =MU(!`
System.arraycopy(h.queue,1,data,0,data.length); ]ur?i{S,
} {p.^E5&
]"/SU6#4:
private static class MaxHeap{ E+ctiVL
8eVy*h2:=
void init(int[] data){ gky+.EP.
this.queue=new int[data.length+1]; _h+7KK
for(int i=0;i queue[++size]=data; J#W*,%8O
fixUp(size); WeJ=]7T'L
} IwXWtVL
} kXV;J$1
+E^2]F7Zk
private int size=0; a,36FF~&
IaZmN.k*
private int[] queue; L{&>,ww
AJ+\Qs(0
public int get() { wBDHhXi0
return queue[1]; 0!-'4+"
} :i4AkBNK
0K'{w]Q
public void remove() { 5vFM0
SortUtil.swap(queue,1,size--); zo1T`"Y
fixDown(1); 9a[1s|>w-
} 0W0GSDx
file://fixdown 3! #|hI>f
private void fixDown(int k) { ;A4qE W
int j; egK~w8`W%
while ((j = k << 1) <= size) { "cyRzQ6EH
if (j < size %26amp;%26amp; queue[j] j++; iX o(
if (queue[k]>queue[j]) file://不用交换 -AD@wn!wCJ
break; uwQgu!|x
SortUtil.swap(queue,j,k); _TLspqi
k = j; Nw9@E R
} E[WU
} 7]} I
private void fixUp(int k) { R?zlZS.~
while (k > 1) { idB1%?<
int j = k >> 1; eL>wKu:r
if (queue[j]>queue[k]) {yv_Ni*6!
break; A_l\ij$Y
SortUtil.swap(queue,j,k); ny{S&f
k = j; WMHYOJR
} 0cSm^a
} vh.-9eD
Zb=;\l*&
} MJh.)kd$
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} cRH(@b Xr
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SortUtil： sj4\lpZ3h
L pq)TE#
package org.rut.util.algorithm; X{Fr
o{>4PZ}=g
import org.rut.util.algorithm.support.BubbleSort; X1d{7H8A2
import org.rut.util.algorithm.support.HeapSort; 5kGQf
import org.rut.util.algorithm.support.ImprovedMergeSort; w[F})u]E
import org.rut.util.algorithm.support.ImprovedQuickSort; (a0(ZOKH
import org.rut.util.algorithm.support.InsertSort; Mk~U/oq
import org.rut.util.algorithm.support.MergeSort; e]nP7TIU
import org.rut.util.algorithm.support.QuickSort; oKYa?
import org.rut.util.algorithm.support.SelectionSort; Auc&dpW
import org.rut.util.algorithm.support.ShellSort; 'Kk/ J+6U
>;XtJJS
/** [ :)F-
* @author treeroot "f8,9@
* @since 2006-2-2 hP8w3gl_
* @version 1.0 0r_~LN^|[
*/ Oe x
public class SortUtil { ]h~F%
public final static int INSERT = 1; i9Beap/t$
public final static int BUBBLE = 2; BdMd\1eMw
public final static int SELECTION = 3; H#7=s{u
public final static int SHELL = 4; *Lxt{z`9
public final static int QUICK = 5; c0Bqm
public final static int IMPROVED_QUICK = 6; W**[:n+
public final static int MERGE = 7; *+zFsu4l
public final static int IMPROVED_MERGE = 8; w,X)g{^T
public final static int HEAP = 9; SHs [te[
T*mR9 8i
public static void sort(int[] data) { m_Pk$Vwx
sort(data, IMPROVED_QUICK); VQ,5&-9Y3
} t{yj`Vg
private static String[] name={ 0ETT@/)]z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w&f>VB~,1
}; CVvl &on
W4$aX5ow$
private static Sort[] impl=new Sort[]{ S!#5
new InsertSort(), ]zVQL_%,
new BubbleSort(), .?rs5[th*
new SelectionSort(), b+q'xnA=>
new ShellSort(), *^Zt)U1$|
new QuickSort(), Kp*3:XK
new ImprovedQuickSort(), f[D%(
new MergeSort(), X31%T"
new ImprovedMergeSort(), 0C.5Qx
new HeapSort() sxA]o|
}; Go1xyd:k
R<_VWPlj
public static String toString(int algorithm){ %TRJ
return name[algorithm-1]; ovOV&Zt
} J~xm[^0
`q\F C[W
public static void sort(int[] data, int algorithm) { /k?l%AH
impl[algorithm-1].sort(data); H{yBDxw
} "!(@MfjT
lz6CK
public static interface Sort { n|?sNM<J3
public void sort(int[] data); zRmVV}b
} =$+0p3[r
wl%ysM|x
public static void swap(int[] data, int i, int j) { m' S{P:TK
int temp = data; % >a /m.$
data = data[j]; y`8U0TE3R
data[j] = temp; Ym"^Ds}
} ]hy@5Jyh
} Du +_dr^4