[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; ))#_@CwRr
} ;WsV.n
int i1=l; kv?j]<WN
int i2=mid+1; bR|1*<
for(int cur=l;cur<=r;cur++){ #.~lt8F
if(i1==mid+1) Dlu]4n[LB
data[cur]=temp[i2++]; 3O'X;s2\d
else if(i2>r) \G &q[8F\
data[cur]=temp[i1++]; N!=Q]\ZD
else if(temp[i1] data[cur]=temp[i1++]; 3 p9LVa
else .aqP=
data[cur]=temp[i2++]; u=p-]?
} "0l7%@z*)q
} u:O6MO9^
FuZLE%gP
} s2\6\8Ipn
z`+j]NX]
改进后的归并排序: aQhr$aH
$^"_Fox]A\
package org.rut.util.algorithm.support; Ol. rjz9
7_ah1IEK
import org.rut.util.algorithm.SortUtil; DM@&=c
z6Jfu:_N!
/** x<e-%HB*-
* @author treeroot 9k>=y n
* @since 2006-2-2 Y=N; Bj
* @version 1.0 QG=&{-I~[3
*/ jF%[.n[BU
public class ImprovedMergeSort implements SortUtil.Sort { HFd>UdT%
PyfOBse}r
private static final int THRESHOLD = 10; Dhe ]f#d
jo8;S?+<|?
/* *]_GFixi
* (non-Javadoc) GCEq3 ^/
* /!Kl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &OSyU4r
*/ ewcgg
public void sort(int[] data) { 1z[GYRSt
int[] temp=new int[data.length]; a0ze7F<(
mergeSort(data,temp,0,data.length-1); wUz)9n 6j
} \V,;F!*#G
\LS+.bp%
private void mergeSort(int[] data, int[] temp, int l, int r) { `FM^)(wT
int i, j, k; MO$dim>
int mid = (l + r) / 2; !zNMU$p
if (l == r) ~|~j01#
return; |O]oX[~
if ((mid - l) >= THRESHOLD) ){oVVLs
mergeSort(data, temp, l, mid); -cHX3UAEI
else h7S&tW GU
insertSort(data, l, mid - l + 1); mJ|7Jc
if ((r - mid) > THRESHOLD) z!I(B^)BkT
mergeSort(data, temp, mid + 1, r); afMIqQ?
else 5PQs1B
insertSort(data, mid + 1, r - mid); *?+maK{5+
zoV-@<Eh
for (i = l; i <= mid; i++) { #)BdN
temp = data; FT* o;&_QS
} $v6dB {%Qu
for (j = 1; j <= r - mid; j++) { !Ax7k;T
temp[r - j + 1] = data[j + mid]; !Fz9\|
} }hFjl4`xa
int a = temp[l]; .#;;pu7W
int b = temp[r]; 6tbH(
for (i = l, j = r, k = l; k <= r; k++) { >, &6zj
if (a < b) { u= K?K
data[k] = temp[i++]; o"x&F
a = temp; w%1B_PyDg
} else { ]AGJPuX
data[k] = temp[j--]; <L__;j1Wx
b = temp[j]; OZ q/'*
} 9zkR)C
} rY>{L6d
} r^?%N3
Iy](?b
/** F^=|NlU&%
* @param data -NVk>ENL4
* @param l X!n-nms
* @param i NDRk%_Eu(
*/ {cv,Tz[Q>
private void insertSort(int[] data, int start, int len) { 0n_Cuh\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t?v0ylN
} jK&kQ
} {nbD5?
} N2}].}
} Fa9]!bW
mhM=$AIq
堆排序： Z$,1Tk"O/s
h"YIAQ',
package org.rut.util.algorithm.support; 'W$jHs
79a{Zwdd9j
import org.rut.util.algorithm.SortUtil; 8*)zoT*A
H#G~b""mY
/** @)m+O#a
* @author treeroot 3;j?i<kM
* @since 2006-2-2 xGqe )M>8?
* @version 1.0 ;=Bf&hY&
*/ P!m~tu}B
public class HeapSort implements SortUtil.Sort{ y6;'?.Y1
;'pEzz?k"
/* (non-Javadoc) Uz H)fB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RN3w{^Ll
*/ L"tj DAV
public void sort(int[] data) { bsPwTp^
MaxHeap h=new MaxHeap(); [8SW0wsk
h.init(data); @dJ s
for(int i=0;i h.remove(); }<&g1x'pa
System.arraycopy(h.queue,1,data,0,data.length); 5<a)SP 0
} (1(3:)@S6
Tc\^=e^N?
private static class MaxHeap{ *`);_EVc
tZU"Ud
void init(int[] data){ !hFb<
this.queue=new int[data.length+1]; ?YgK]IxD
for(int i=0;i queue[++size]=data; ,vW.vq<{q3
fixUp(size); akBR"y:~:H
} PQvq$|q
} 60teD>Eh,
ui70|
private int size=0; w_,.
`U!eh1*b
private int[] queue; ahS*YeS7
m3 (fr
public int get() { X'jEI{1w
return queue[1]; VuJth
} [CRy>hfV
Si*Pi
public void remove() { .(CzsupY_q
SortUtil.swap(queue,1,size--); =[t([DG
fixDown(1); xJ>hN@5}i
} D}cq_|mmn[
file://fixdown MY9?957F
private void fixDown(int k) { qJ"dkT*
int j; *-_` xe
while ((j = k << 1) <= size) { { j&|Em]
if (j < size %26amp;%26amp; queue[j] j++; >V87#E
if (queue[k]>queue[j]) file://不用交换 DWk'6;e4j
break; vT%rg r
SortUtil.swap(queue,j,k); }%$9nq3
k = j; wm*`
} 1.yw\ZC\
} yW|yZ(7
private void fixUp(int k) { <B$Lu4b@c
while (k > 1) { bU2)pD!N
int j = k >> 1; ;n7k_K#0z!
if (queue[j]>queue[k]) (sJ{27b_
break; z~o%U&DO}
SortUtil.swap(queue,j,k); ;c:vzF~Q
k = j; c4L5"_#`x-
} XuR!9x^5
} 3{d1Jk/S
JZu7Fb]L9
} $3Wl~ G}
dW8'$!@!!
} 39"8Nq|e
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SortUtil： 5>}L3r>a;
<diI*H<G
package org.rut.util.algorithm; (M.Sl
<T
import org.rut.util.algorithm.support.BubbleSort; CXCU5-
import org.rut.util.algorithm.support.HeapSort; W.zA1S
import org.rut.util.algorithm.support.ImprovedMergeSort; C&<f YCwG
import org.rut.util.algorithm.support.ImprovedQuickSort; )]>=Uo
import org.rut.util.algorithm.support.InsertSort; v[m/>l2[P
import org.rut.util.algorithm.support.MergeSort; K.l?R#G`,F
import org.rut.util.algorithm.support.QuickSort; 1K^/@^
import org.rut.util.algorithm.support.SelectionSort; 1/a*8vuGh
import org.rut.util.algorithm.support.ShellSort; .t"s>jq 1
tEiN(KA!5
/** &z1r$X.AW
* @author treeroot w4(DR?[nC
* @since 2006-2-2 qx0J}6+NlU
* @version 1.0 x-y=Jor
*/ Sm+Ek@Ax
public class SortUtil { 3gv>AgG
public final static int INSERT = 1; Q9%N>h9
public final static int BUBBLE = 2; m]7yc>uDy
public final static int SELECTION = 3; xOTm-Cm9L
public final static int SHELL = 4; mqq~&nI
public final static int QUICK = 5; {r'#(\
public final static int IMPROVED_QUICK = 6; LsV!Sd
public final static int MERGE = 7; J&8l1{gd
public final static int IMPROVED_MERGE = 8; wQM(Lm#Q
public final static int HEAP = 9; J"6_H =s
"5Kx]y8
public static void sort(int[] data) { a&XURyp
sort(data, IMPROVED_QUICK); ub,Sj{Mq"
} >K50 h
private static String[] name={ oh& PQ{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5'l+'ox@J
}; w?!@fu
#FuOTBNvB
private static Sort[] impl=new Sort[]{ o5Pq>Y2T
new InsertSort(), <bGSr23*
new BubbleSort(), P_&2HA,I
new SelectionSort(), 1C.<@IZ
new ShellSort(), 5Z`f)qE
new QuickSort(), *(o~pxFTR
new ImprovedQuickSort(), x]y~KbdeB
new MergeSort(), dLQ!hKD~
new ImprovedMergeSort(), "'6KQnpZ
new HeapSort() s|EP/=9i
}; <k<
?LvZEiJ
public static String toString(int algorithm){ G+\2Aj
return name[algorithm-1]; f>p;Jh{2fn
} (MNbABZQ
61!R-
public static void sort(int[] data, int algorithm) { #G9S[J=xe
impl[algorithm-1].sort(data); $+7MY-9T
} @Cw<wrem
u^iK?S#Ci8
public static interface Sort { \J9@p
public void sort(int[] data); 3&3S*1b-H
} &*MwKr<y
Ov?k4kJ
public static void swap(int[] data, int i, int j) { a8Ci 7<V
int temp = data; s:;!QIC5jo
data = data[j]; nJ'O(Wh,)
data[j] = temp; #Q$9Eq8"[
} fTV:QAa;
} [",W TZ: