[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; b)$<aFl
} E[2c`XFd8
int i1=l; &OGY?[n
int i2=mid+1; v.\1-Q?
for(int cur=l;cur<=r;cur++){ bbiDY
if(i1==mid+1) $}W=O:L+D
data[cur]=temp[i2++]; =wU08}
else if(i2>r) nd_d tsp#
data[cur]=temp[i1++]; GRO[&;d`
else if(temp[i1] data[cur]=temp[i1++]; +n^$4f
else Y'bDEdeT
data[cur]=temp[i2++]; &bs/a]?Z7
} ?KI_>{
} 6/s#'#jh
R S;r
} .\{GU9|nO
aQ]C`9k
改进后的归并排序: gjvKrg
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package org.rut.util.algorithm.support; "-A@>*g
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import org.rut.util.algorithm.SortUtil; #<4h Y7/
*Yl9%x]3c
/** "J%u !~
* @author treeroot _hAp@? M
* @since 2006-2-2 OPBnU@=R
* @version 1.0 q%Obrk
*/ M<~z=B#
public class ImprovedMergeSort implements SortUtil.Sort { h+CTi6-p
,V.X-`Y
private static final int THRESHOLD = 10; 5sFp+_``
%@kmuz??
/* V8`t7[r
* (non-Javadoc) MPT*[&\-
* 2m[z4V@`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E]6;nY?
*/ +<|6y46
public void sort(int[] data) { I r<5%
int[] temp=new int[data.length]; e6QUe.S
mergeSort(data,temp,0,data.length-1); b)3dZ*cOJ
} <k6Zx-6X<
wC`])z}bT
private void mergeSort(int[] data, int[] temp, int l, int r) { -fT]}T6=
int i, j, k; k[gO>UGB;
int mid = (l + r) / 2; l`~*"4|/
if (l == r) u z4P
return; 6i(nyA 2!
if ((mid - l) >= THRESHOLD) B;2os^*
mergeSort(data, temp, l, mid); # x!47Y{
else R4]t D|
insertSort(data, l, mid - l + 1); iZwt,)(
if ((r - mid) > THRESHOLD) qOV#$dkY
mergeSort(data, temp, mid + 1, r); ,N?~je.
else #fRhG^QKp
insertSort(data, mid + 1, r - mid); 4nXS}bWf
3!,XR\`[
for (i = l; i <= mid; i++) { }R;.~F
temp = data; 3/@7$nV
} bQrH8)
for (j = 1; j <= r - mid; j++) { ]j~V01p/e
temp[r - j + 1] = data[j + mid]; 5|9,S
} SLD%8:Zn
int a = temp[l]; ]xCJ3.9
int b = temp[r]; -s,^_p{H
for (i = l, j = r, k = l; k <= r; k++) { !G90oW
if (a < b) { `QnKal)
data[k] = temp[i++]; uv/I`[@HK8
a = temp; F(Pe@ #)A
} else { .]k+hc`
data[k] = temp[j--]; C~yfuPr\B
b = temp[j]; 1*Yf[;L
} V&eti2&zO
} UMma|9l(i
} Gvb>M=9
.Xc, Gq{
/** 9H_2Y%_
* @param data 8&IsZPq%l
* @param l (I IPrW;>
* @param i %r=uS.+hrF
*/ |Z0?
private void insertSort(int[] data, int start, int len) { m$NBGw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P|!GXkS
} `kpX}cKK}
} `M6!V
} E*:!G
} 1j`-lD
M$B9?N6
堆排序： _*>bf G
+\fr3@Yc
package org.rut.util.algorithm.support; E5~HH($b
t>)iC)^u
import org.rut.util.algorithm.SortUtil; 'nz;|6uC
0~iC#lHO
/** rr>QG<i;G
* @author treeroot iKnH6}`?U
* @since 2006-2-2 r`qMif'
* @version 1.0 w4Qqo(
*/ [2pp)wq
public class HeapSort implements SortUtil.Sort{ GvF8S MO[x
'_lyoVP
/* (non-Javadoc) zH0%; o}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [ >O4hifq
*/ 9z$]hl
public void sort(int[] data) { WS/^WxRY
MaxHeap h=new MaxHeap(); n#uH^@#0
h.init(data); J*o:RnB
for(int i=0;i h.remove(); Wb+^Ue
System.arraycopy(h.queue,1,data,0,data.length); #=V%S 2~
} +dX1`%RR[
6}='/d-[
private static class MaxHeap{ MUhC6s\F
w,bILv)
void init(int[] data){ QM\vruTB
this.queue=new int[data.length+1]; D>+&= 5{
for(int i=0;i queue[++size]=data; iS&~oj_-%
fixUp(size); jV]'/X<
} 3FT%.dV^
} MqGF~h|+
*;"N kCf
private int size=0; 7F5t&
bW(+Aw=O
private int[] queue; ,d(F|5M:
8/,m8UOY
public int get() { uSLO"\zysX
return queue[1]; dIQ7u
} XKp.]c wP
"u~l+aW0
public void remove() { Tf7$PSupP
SortUtil.swap(queue,1,size--); gcqcY
fixDown(1); a*REx_gLG
} ]W7(}~m
file://fixdown a/;u:"
private void fixDown(int k) { Y]/(R"-2G
int j; v_)a=I%o&2
while ((j = k << 1) <= size) { IMIZ#/
if (j < size %26amp;%26amp; queue[j] j++; +-&N<U
if (queue[k]>queue[j]) file://不用交换 ,DK|jf
break; ;ZHKTOoK
SortUtil.swap(queue,j,k); "D}PbT[V
k = j; a\S"d
} ]:i :QiYD
} i>HipD,TD
private void fixUp(int k) { 7Bm 18
while (k > 1) { /%EKq+ZP
int j = k >> 1; >^LVj[.1
if (queue[j]>queue[k]) D M(WYL{
break; _P 0,UgZz
SortUtil.swap(queue,j,k); F,Y@
k = j; GenkYtS
} e48`cX\E
} YLmzMD>
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} P*oKcq1R
py`RH)
} dya]^L}fL
CB<1]Z
SortUtil： ZKzXSI4
:*gYzk8
package org.rut.util.algorithm; aehGT|
m(>_C~rGN
import org.rut.util.algorithm.support.BubbleSort; Xt~`EN
import org.rut.util.algorithm.support.HeapSort; Rn~FCj,-
import org.rut.util.algorithm.support.ImprovedMergeSort; vZj^&/F$=g
import org.rut.util.algorithm.support.ImprovedQuickSort; nv1'iSEeOl
import org.rut.util.algorithm.support.InsertSort; oJe9H<
import org.rut.util.algorithm.support.MergeSort; P1;T-.X~&
import org.rut.util.algorithm.support.QuickSort; g9|B-1[
import org.rut.util.algorithm.support.SelectionSort; Qna ^Ry?6)
import org.rut.util.algorithm.support.ShellSort; !-b4@=f:
,cPNZ-%
/** rLs)*A!
* @author treeroot La48M'u
* @since 2006-2-2 J;h4)w~9H3
* @version 1.0 Z]DO
*/ CXks~b3SD
public class SortUtil { g66=3c9</6
public final static int INSERT = 1; x^Tjs<#
public final static int BUBBLE = 2; [?x9NQ{
public final static int SELECTION = 3; WLW'.
public final static int SHELL = 4; s|Ls
public final static int QUICK = 5; @iK=1\-2
public final static int IMPROVED_QUICK = 6; lA {
public final static int MERGE = 7; _/bFt6
public final static int IMPROVED_MERGE = 8; ^0"NcOzzxl
public final static int HEAP = 9; zqfv|3-!}
DrLNY"Zq
public static void sort(int[] data) { }1]/dCv
sort(data, IMPROVED_QUICK); $T{,3;kt
} *6^|i}
private static String[] name={ 3#huC=zbf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >C y
}; 0l3v>ty
9;2PoW8
private static Sort[] impl=new Sort[]{ s^ rO I~
new InsertSort(), Nv "R'Pps
new BubbleSort(), *vv<@+gA
new SelectionSort(), h=SQ]nV{
new ShellSort(), 1MHP#X;|
new QuickSort(), X).UvPZ/
new ImprovedQuickSort(), 35z]pn%L
new MergeSort(), w]GoeIg({
new ImprovedMergeSort(), yi<&'L;
new HeapSort() r \H+=2E'
}; Uov%12
Be}e%Rk
public static String toString(int algorithm){ v ~.X
return name[algorithm-1]; .+>w0FG.
} :,"dno7OQ
~ ui/Qf2|
public static void sort(int[] data, int algorithm) { Mf7Q+_!
impl[algorithm-1].sort(data); ;Q&38qI
} ozH7c_ <
W)JUMW2|
public static interface Sort { 4O_z|K_k|
public void sort(int[] data); k%E9r'Ac
} @3KVYv,q
<q hNX$t
public static void swap(int[] data, int i, int j) { E0[!jZ:c
int temp = data; kv&%$cA
data = data[j]; N ?Jr8
data[j] = temp; qJ|ByZ.N+
} [1B F8:
} J9S9rir&