[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; Td5;bg6Qy
} NK+iLXC
int i1=l; ~cSOni`
int i2=mid+1; s:y=X$&M
for(int cur=l;cur<=r;cur++){ *a7&v3X
if(i1==mid+1) u@$C i/J*
data[cur]=temp[i2++]; 'i|z>si[*
else if(i2>r) iVt*N$iZ
data[cur]=temp[i1++]; 7usf^g[dh
else if(temp[i1] data[cur]=temp[i1++]; \P_1@sH=
else eJrJ5mlI`
data[cur]=temp[i2++]; H}QOoXWkg
} b_]14 v
} 1e>,QX
Zv*Z^; X9
} MKYXYR
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改进后的归并排序: =kUN ^hb
b:nHcxDU<
package org.rut.util.algorithm.support; i# 1:DiF
<5Jp2x#
import org.rut.util.algorithm.SortUtil; 0'm4 )\
A({8p
/** NGlX%j4j
* @author treeroot AoEG%nT
* @since 2006-2-2 AopCxaJ`
* @version 1.0 ui,#AZQ#{4
*/ EF?@f{YY$n
public class ImprovedMergeSort implements SortUtil.Sort { Kd _tjWS
{<a(1#{
private static final int THRESHOLD = 10; !'No5
vb-L "S?kC
/* /u }AgIb
* (non-Javadoc) E3\O?+h#
* RbJ,J)C>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A|V |vT7cb
*/ hmOhXE[a&
public void sort(int[] data) { cZN+D D
int[] temp=new int[data.length]; P"%i 4-S
mergeSort(data,temp,0,data.length-1); "]ow1{
} -So&?3,\A@
\$2E
private void mergeSort(int[] data, int[] temp, int l, int r) { Kv[,!P"Y
int i, j, k; qHfs*MBJ%
int mid = (l + r) / 2; z6vRTY
if (l == r) Eoug/we
return; ;K[`o/#4"
if ((mid - l) >= THRESHOLD) Q9N=yz
mergeSort(data, temp, l, mid); 1\q2;5
else 1q*85[Y
insertSort(data, l, mid - l + 1); kn_%'7
if ((r - mid) > THRESHOLD) m-lUgx7
mergeSort(data, temp, mid + 1, r); Cyxt EzPp
else `5;O|qRq
insertSort(data, mid + 1, r - mid); #e0tT+
!6ZkLE[XJ<
for (i = l; i <= mid; i++) { 3VbQDPG
temp = data; ip4:px-
} C26PQGo#$
for (j = 1; j <= r - mid; j++) { ^.F@yo2}
temp[r - j + 1] = data[j + mid]; _gK@),de
} )p>BN|L
int a = temp[l]; 7'_zJI^
int b = temp[r]; AG2iLictv
for (i = l, j = r, k = l; k <= r; k++) { MPMJkL$F^
if (a < b) { .9WJ/RKZ\D
data[k] = temp[i++]; l tr=_
a = temp; KE+y'j#C3
} else { 8@|_];9#.
data[k] = temp[j--]; #F.;N<a
b = temp[j]; >De\2gbJ
} y@J]busU
} 12aAO|]/~
} \Nu(+G?e
gM20n^
/** 2As 4}
* @param data W|3XD-v@
* @param l qtTys gv
* @param i lNQt
*/ n*%<!\gJ
private void insertSort(int[] data, int start, int len) { 34 W#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2i#wJ8vrF
} 6#On .Q
} LbtcZ)D!
} Dg/&m*Yl
} L@w|2
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堆排序： S5E mLgnRs
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package org.rut.util.algorithm.support; ZVJbpn<lo)
X%xX3e'
import org.rut.util.algorithm.SortUtil; D Y($
+/7UM x1
/** ZPn`.Qc
* @author treeroot =L9sb!
* @since 2006-2-2 e~c;wP~cO
* @version 1.0 [kgT"?w=
*/ *@lNL=%R
public class HeapSort implements SortUtil.Sort{ F'W{\4
|uQJMf[L)
/* (non-Javadoc) iCao;Zb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JJq= {;
*/ cUaLv1:HI
public void sort(int[] data) { DIH.c7o
MaxHeap h=new MaxHeap(); ]x?9lQ1&
h.init(data); /}r%DND'
for(int i=0;i h.remove(); -]R7[5C:
System.arraycopy(h.queue,1,data,0,data.length); 3'Q H\t5
} x:O?Fj
Z,qo jtw
private static class MaxHeap{ v&i M/pJU
K7Kd{9-2
void init(int[] data){ 41mg:xW(J
this.queue=new int[data.length+1]; b-ULoV
for(int i=0;i queue[++size]=data; c~b[_J)
fixUp(size); EQ8jxr<p
} >5#`j+8=q
} uI@:\Rss
NQ !t`
private int size=0; R{\vOw:*
OljUK,I]
private int[] queue; Xz4!#,z/
~4'e)g.hG
public int get() { s\1h=V)!H
return queue[1]; QK<sibDI
} LpeQx\
49^;T;'v
public void remove() { k'&BAC.K,
SortUtil.swap(queue,1,size--); o*eU0
fixDown(1); n'v[[bmu
} ] NL-)8u
file://fixdown Dr$k6kZ}'U
private void fixDown(int k) { YH&`+ +
int j; {*ATY+
while ((j = k << 1) <= size) { UGj!I
if (j < size %26amp;%26amp; queue[j] j++; {'E%SIRZ)
if (queue[k]>queue[j]) file://不用交换 %RG kXOgp
break; '}e_8FS
SortUtil.swap(queue,j,k); [0El z@.C
k = j; "yXKu)_
} TDs=VTd@Z
} *?Nrx=O*
private void fixUp(int k) { G)]'>m<y
while (k > 1) { B^P)(Nu+
int j = k >> 1; Q4Zuz)r*
if (queue[j]>queue[k]) $[T^S
break; [-_3Zr
SortUtil.swap(queue,j,k); M' e<\wqm
k = j; [^$nt
} Fm_^7|
} ^=.R#zrc
9+nB;vA
} Ci4`,
VdjS\VYe,
} H=9kDP${
ExeD3Zj
SortUtil： =,$*-<p=3
<{GpAf8-
package org.rut.util.algorithm; _VGAh:v
-KhNsUQk
import org.rut.util.algorithm.support.BubbleSort; z0+LD
import org.rut.util.algorithm.support.HeapSort; Y#S<:,/sb?
import org.rut.util.algorithm.support.ImprovedMergeSort; 7DDd1"jE
import org.rut.util.algorithm.support.ImprovedQuickSort; a\>+!Vq
import org.rut.util.algorithm.support.InsertSort; Xyy;BO:
import org.rut.util.algorithm.support.MergeSort; >h1 3i@`r
import org.rut.util.algorithm.support.QuickSort; 1K?RA*aj
import org.rut.util.algorithm.support.SelectionSort; ;>np2K<`
import org.rut.util.algorithm.support.ShellSort; GK.^Gd
4~xKW2*`K
/** k\BJs@-
* @author treeroot EudX^L5U<d
* @since 2006-2-2 Yz]c'M@
* @version 1.0 (RVe,0y
*/ #%N v\g;
public class SortUtil { p4GhT~)l:
public final static int INSERT = 1; Z^E>)!t
public final static int BUBBLE = 2; #V&98 F
public final static int SELECTION = 3; 3.@"GS#"[
public final static int SHELL = 4; m0QE S
public final static int QUICK = 5; 6!zBLIYFI
public final static int IMPROVED_QUICK = 6; )12.W=p
public final static int MERGE = 7; {,NGxqhE
public final static int IMPROVED_MERGE = 8; i)y8MlC{
public final static int HEAP = 9; 3n;>k9{
]xC#XYE:dy
public static void sort(int[] data) { w\,N}'G
sort(data, IMPROVED_QUICK); ]<L(r,@,
} d-c<dS+R
private static String[] name={ /N= }wC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?C)a0>L
}; fn.KZ
yJQ>u
private static Sort[] impl=new Sort[]{ OL]P(HRm]~
new InsertSort(), EQI9J#;+
new BubbleSort(), 01=nS?
new SelectionSort(), fh_+M"Y0`
new ShellSort(), -!;2?6R9{
new QuickSort(), ;\j7jz^uC
new ImprovedQuickSort(), zU7co.G
new MergeSort(), WX .Ax$fT
new ImprovedMergeSort(), Zc9@G-
new HeapSort() K&ZN!VN/p
}; } I>68dS[
!C\$=\$
public static String toString(int algorithm){ 9d&@;&al
return name[algorithm-1]; ^POHQQ
} V%h,JA
dUN{@a\R0
public static void sort(int[] data, int algorithm) { ' ` _TFTO
impl[algorithm-1].sort(data); 4> k"$l/:
} /T_{k.
L$L/5/
public static interface Sort { yPY}b_W
public void sort(int[] data); '8%jA$o\g
} YTpiOPf
PAng(tubl
public static void swap(int[] data, int i, int j) { 8tfM,.]_i
int temp = data; '41'Gn
data = data[j]; .3 >"qv
data[j] = temp; |w5m2Z
} S[ch/
} L~oy|K67