[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; {7OHEArv
} c0gVW~I1
int i1=l; ;mG*Rad
int i2=mid+1; `.W2t5Y
for(int cur=l;cur<=r;cur++){ `x`[hJ?i
if(i1==mid+1) T`ibulp
data[cur]=temp[i2++]; (?na|yd
else if(i2>r) }|kFHodo
data[cur]=temp[i1++]; k||t<&`Ze
else if(temp[i1] data[cur]=temp[i1++]; S'jg#*$
else T$xBH
data[cur]=temp[i2++]; 56 3mz-
} tX{yR'Qhu
} pa[/6(
#hZ$;1.
} VI&x1C
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改进后的归并排序: _s=H|#l
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package org.rut.util.algorithm.support; J+u}uN@
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import org.rut.util.algorithm.SortUtil; esqmj#G
Fz%;_%j
/** e"nm<&
* @author treeroot b|d-vnYE
* @since 2006-2-2 R-13DVK
* @version 1.0 *9aJZWf>V
*/ *j%x
public class ImprovedMergeSort implements SortUtil.Sort { z~ cW,
N T`S)P*?
private static final int THRESHOLD = 10; 'u7-Qetj
gsk? !D
/* -Uwxmy+
* (non-Javadoc) J?QS7#!%
* -b(DPte
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) { qNPhi
*/ m+TAaK
public void sort(int[] data) { pjWRd_h.
int[] temp=new int[data.length]; -zR<m
mergeSort(data,temp,0,data.length-1); +WH\,E
} &]nx^C8V;
FE~D:)Xj'?
private void mergeSort(int[] data, int[] temp, int l, int r) { P0m3IH)
int i, j, k; xh;V4zK@`
int mid = (l + r) / 2; e5|lz.o;
if (l == r) #).$o~1ht!
return; fjh|V9H
if ((mid - l) >= THRESHOLD) Ax;[Em?I
mergeSort(data, temp, l, mid); ?Y(
else ,QY$:f<
insertSort(data, l, mid - l + 1); +1ICX
if ((r - mid) > THRESHOLD) pM?;QG;jA
mergeSort(data, temp, mid + 1, r); JE?rp1.
else Zse&{
insertSort(data, mid + 1, r - mid); $9)os7H7
}aZuCe_
for (i = l; i <= mid; i++) { >HP `B2Q H
temp = data; b(iF0U>&
} \i%'M%
for (j = 1; j <= r - mid; j++) { HN7CcE+l
temp[r - j + 1] = data[j + mid]; +[7~:e}DZ
} cgg6E O(
int a = temp[l]; vrnvv?HPrR
int b = temp[r]; _%w680b'
for (i = l, j = r, k = l; k <= r; k++) { j9p6rD
if (a < b) { #De>EQ%
data[k] = temp[i++]; #,%bW[L<N
a = temp; `2mddx8
} else { Joow{75K
data[k] = temp[j--]; 2Y vr|] \8
b = temp[j]; ge~@}&#iO@
} l4bytI{63
} AUnfhk@$
} ".?4`@7F\
XUqorE
/** Eb8pM>'qM
* @param data //R"ZE@d\
* @param l Hn|W3U
* @param i )4yP(6|lx
*/ 8dGsV5"*
private void insertSort(int[] data, int start, int len) { hyI7X7Hy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (8duV
} 9LDv?kYr
} k9Pvh,_wp
} i?x gV_q;
} mMAN*}`O
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堆排序： 8Zr;n`~
ul~ux$a
package org.rut.util.algorithm.support; &N~Eu-@b
Q_5l.M/9]
import org.rut.util.algorithm.SortUtil; Qs6<(zaqkt
,2@o`R.27
/** ^/f~\#R
* @author treeroot 7EJ2 On
* @since 2006-2-2 PTQ#8(_,
* @version 1.0 Ds9)e&yYrb
*/ `2lS@
public class HeapSort implements SortUtil.Sort{ n6/Ous
#@R0$x
/* (non-Javadoc) B `(jTL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q+:y
*/ ZT0\V ]!B
public void sort(int[] data) { HI.*xkBXl&
MaxHeap h=new MaxHeap(); 66yw[,Y
h.init(data); -ss= c#
for(int i=0;i h.remove(); akj<*,
System.arraycopy(h.queue,1,data,0,data.length); 3$|/7(M&DA
} Pvxb6\G&d
-`O{iHfM|P
private static class MaxHeap{ f1 ;
G@]3EP
void init(int[] data){ Hfcpqa
this.queue=new int[data.length+1]; Jj4HJ9
for(int i=0;i queue[++size]=data; I2Xd"RHN
fixUp(size); @\K[WqF$$q
} vsY?q8+P
} WtT;y|W
&>sbsx\y
private int size=0; As:O|!F
*dl hRa
private int[] queue; Fr9/TI
8wU$kK
public int get() { p.DQ|?
return queue[1]; >)>f~>
} gq=t7b
*1|7%*!8
public void remove() { ACszx\[K3
SortUtil.swap(queue,1,size--); =pH2V^<<#
fixDown(1); DIC*{aBf
} a<cwrDZ
file://fixdown ]Q^)9uE\D
private void fixDown(int k) { Cf% qap#
int j; YT\`R
while ((j = k << 1) <= size) { ;%e&6
if (j < size %26amp;%26amp; queue[j] j++; T{{:p\<]_
if (queue[k]>queue[j]) file://不用交换 77>oQ~q
break; 8mI(0m'
SortUtil.swap(queue,j,k); 0At0`Q#
k = j; @8d 3
} m1$tf ^
} I^NDJdxd
private void fixUp(int k) { K~W(ZmB
while (k > 1) { EVmBLH-a
int j = k >> 1; 6^`iuC5
if (queue[j]>queue[k]) `#""JTA"
break; i]8O?Ab>?
SortUtil.swap(queue,j,k); %OQdUH4x
k = j; X9x`i
} W06aj ~7Z
} ?cU,%<r
Y_Yf'z1>[
} X8C7d6ca
I)HO/i6>3
} c-w #`
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SortUtil： .. `I<2
#M-!/E
package org.rut.util.algorithm; SUS=sR/N
fG0?"x@>
import org.rut.util.algorithm.support.BubbleSort; RGW@@
import org.rut.util.algorithm.support.HeapSort; .9~j%]q
import org.rut.util.algorithm.support.ImprovedMergeSort; =LW!$p
import org.rut.util.algorithm.support.ImprovedQuickSort; N' hT
import org.rut.util.algorithm.support.InsertSort; lY%I("2=
import org.rut.util.algorithm.support.MergeSort; (0-Ol9[
import org.rut.util.algorithm.support.QuickSort; \}Q=q$)
import org.rut.util.algorithm.support.SelectionSort; #2tmi1 ya
import org.rut.util.algorithm.support.ShellSort; _w^,j"
%>KbaM1b
/** v~$V
* @author treeroot (W1$+X
* @since 2006-2-2 ">V1II 7
* @version 1.0 pH'_k k
*/ ^<I(
public class SortUtil { >pq~ &)^u
public final static int INSERT = 1; VfU"%0x
public final static int BUBBLE = 2; (r|m&/
public final static int SELECTION = 3; 05d0p|},
public final static int SHELL = 4; `TBXJ(Y
public final static int QUICK = 5; qTsy'y;Z
public final static int IMPROVED_QUICK = 6; zdN[Uc+1Bd
public final static int MERGE = 7; b:==:d:0s
public final static int IMPROVED_MERGE = 8; z.Cj%N
public final static int HEAP = 9; g5V\R*{
&Ok1j0~~
public static void sort(int[] data) { #asg5 }
sort(data, IMPROVED_QUICK); @MSmg3&
} lQ8hY$
private static String[] name={ g'.OzD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;1k&}v&
}; E&U_1D9=L<
>kXscbRL7
private static Sort[] impl=new Sort[]{ :i.@d?
new InsertSort(), L(y70T
new BubbleSort(), j|!,^._i
new SelectionSort(), 4BCPh:
new ShellSort(), aODh5
new QuickSort(), pz%s_g'
new ImprovedQuickSort(), Af3|l
new MergeSort(), sz9W}&(j
new ImprovedMergeSort(), bzr2Zj{4
new HeapSort() ]$smFF
}; 'ZbWr*bo
*HoRYCL
public static String toString(int algorithm){ 4]o+)d.`(
return name[algorithm-1]; Y'U1=w~E
} us.#|~i<h
)Q2IYCj{
public static void sort(int[] data, int algorithm) { z,,"yVk`,
impl[algorithm-1].sort(data); >|taU8^|G}
} YR?Y:?(
T$;S
public static interface Sort { ';C'9k<P:
public void sort(int[] data); gk6f_0?X'
} (/:m*x*6
{JE [
public static void swap(int[] data, int i, int j) { IkCuw./
int temp = data; U1 _"D+XB
data = data[j]; VbX P7bZ
data[j] = temp; ]Lv3XMa
} )eZK/>L&
} ocGrB)7eD