[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; Y{j7Q4{
} <(?' s9
int i1=l; oN ;-M-(
int i2=mid+1; pU@YiwP"]x
for(int cur=l;cur<=r;cur++){ L6xB`E9
if(i1==mid+1) AoU_;B\b%
data[cur]=temp[i2++]; q#m!/wod
else if(i2>r) J@gm@ jLc
data[cur]=temp[i1++]; "u5KbJW
else if(temp[i1] data[cur]=temp[i1++]; PY\W
else T+(M8qb
data[cur]=temp[i2++]; +K&?)?/=
} *?p ^6vO
} [9J:bD
wBE7Bv45
} ^vG=|X|)c
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改进后的归并排序: Nuo^+z E
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package org.rut.util.algorithm.support; Qxky^:B
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import org.rut.util.algorithm.SortUtil; [\a:4vDAbi
cB<O.@
/** |zh +
* @author treeroot eX@v7i,}
* @since 2006-2-2 "&Gw1.p
* @version 1.0 A`IHP{aB
*/ \*Ts)EW
public class ImprovedMergeSort implements SortUtil.Sort { M$F{N
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private static final int THRESHOLD = 10; e|JIrOnc
v` $%G
/* W oWBs)E
* (non-Javadoc) FN>L7 *,0
* df^0{gNHx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m[W/j/$A+x
*/ &{BBxv)y
public void sort(int[] data) { 4`$5 _} j!
int[] temp=new int[data.length]; O/(3 87=U
mergeSort(data,temp,0,data.length-1); e~3]/BL
} @`5QG2
KM5jl9Vv
private void mergeSort(int[] data, int[] temp, int l, int r) { k&yQ98H$K"
int i, j, k; (x}A_i
int mid = (l + r) / 2; .l7j8}
if (l == r) /9P^{OZ;y
return; A0S8Dh$
if ((mid - l) >= THRESHOLD) ]9#CVv[rq
mergeSort(data, temp, l, mid); 1]Gf)|
else o T:j:n
insertSort(data, l, mid - l + 1); YXgWH'i~
if ((r - mid) > THRESHOLD) ]F !'M
mergeSort(data, temp, mid + 1, r); 3xP~~j;7
else JR])xPI`
insertSort(data, mid + 1, r - mid); Kq$:\B)<c
cD5w| rm?i
for (i = l; i <= mid; i++) { 33*^($bE&
temp = data; XMomFW_@
} KuIkul9^%
for (j = 1; j <= r - mid; j++) { d8rBu jT
temp[r - j + 1] = data[j + mid]; GI}4,!^N
} SwyaYK
int a = temp[l]; K*TnUQ
int b = temp[r]; L^6"'#
for (i = l, j = r, k = l; k <= r; k++) { "pOqd8>]
if (a < b) { 6BUBk>A`
data[k] = temp[i++]; zMbfV%b
a = temp; UP}feN
} else { 3(MoXA*
data[k] = temp[j--]; 2XzF k_6H
b = temp[j]; $K`_ K#A
} 4A;[sm^f
} dUI3erO
} Rk}\)r\
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/** cZ6?P`X
* @param data NAJ '><2
* @param l f+{c1fb>s
* @param i ur?d6a
*/ n; Lo
private void insertSort(int[] data, int start, int len) { v hRu`Yb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -)p@BtMS
} >Dk1axZ!>/
} fKFnCng
} su,`q
} rH[5~U
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堆排序： @P*ylB}?Q
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package org.rut.util.algorithm.support; =s`XZkh
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import org.rut.util.algorithm.SortUtil; &/ \O2Aw8
h1n*WQ-
/** mYntU^4f
* @author treeroot iU.!oeR?
* @since 2006-2-2 .UNF~}^H
* @version 1.0 s.f`.o
*/ d&/^34gn
public class HeapSort implements SortUtil.Sort{ )C'G2RV
X7t5b7
/* (non-Javadoc) TFAYVK~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~D<7W4c
*/ E%-Pyg*
public void sort(int[] data) { 3yeK@>C
MaxHeap h=new MaxHeap(); R1II k
h.init(data); 1[26w_B3
for(int i=0;i h.remove(); >`<Ued
System.arraycopy(h.queue,1,data,0,data.length); Mr$# e
} aeEw#
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private static class MaxHeap{ 7xX;MB&
`Af{H/qiI
void init(int[] data){ /p[|DJoM
this.queue=new int[data.length+1]; b{Z^)u2X
for(int i=0;i queue[++size]=data; AQE eIFH
fixUp(size); Y'tqm&}
} 6"BtfQ")
} Q&oC]u(="&
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private int size=0; C4&U:y<ju
b7?U8/#'
private int[] queue; MDMtOfe|
}v_p gatC
public int get() { szf"|k!
return queue[1]; Zkf 3t>[
} *54>iO- c
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public void remove() { hubfK~
SortUtil.swap(queue,1,size--); 9V|E1-")E
fixDown(1); 1~["{u
} | \ s2
file://fixdown &p/S>qKu#
private void fixDown(int k) { :iP>z}h
int j; |pfhrwJp
while ((j = k << 1) <= size) { >t1_5
if (j < size %26amp;%26amp; queue[j] j++; QH@Q\ @,
if (queue[k]>queue[j]) file://不用交换 fG:PdIJ7_
break; Xz;et>UD*B
SortUtil.swap(queue,j,k); .OVW4svX
k = j; $sU5=,
} _fczE~O/
} 1{SrHdD=
private void fixUp(int k) { 9oZ} h&
while (k > 1) { BSx j~pun
int j = k >> 1; AyQS4A.s[
if (queue[j]>queue[k]) w8eG;
break; w$w>N(e
SortUtil.swap(queue,j,k); ovhC42i
k = j; g*:ae;GP
} Q'n(^tbL
} 4+ASwN9
4e=/f,o1
} ,Y+r<;
Ss"|1]acP
} 8>C; >v
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SortUtil： 2ApDpH`fiJ
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package org.rut.util.algorithm; 3v8V*48B$
}-REBrb-
import org.rut.util.algorithm.support.BubbleSort; r;&]?9)W0
import org.rut.util.algorithm.support.HeapSort; -mev%lV
import org.rut.util.algorithm.support.ImprovedMergeSort; c!'A)JD@
import org.rut.util.algorithm.support.ImprovedQuickSort; )GiFkG
import org.rut.util.algorithm.support.InsertSort; eT7!a']x
import org.rut.util.algorithm.support.MergeSort; yt/20a
import org.rut.util.algorithm.support.QuickSort; 6%\7.h
import org.rut.util.algorithm.support.SelectionSort; SREDM
import org.rut.util.algorithm.support.ShellSort; Tf&f`/
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/** O,F]\
* @author treeroot { ()p%#*
* @since 2006-2-2 t,--V|7-
* @version 1.0 jMm_A#V>p
*/ N<#S3B?.
public class SortUtil { 2*~JMbm
public final static int INSERT = 1; }m=tzHB*
public final static int BUBBLE = 2; t*Z .e.q+
public final static int SELECTION = 3; kPx]u\
public final static int SHELL = 4; O:oU`vE
public final static int QUICK = 5; .u&&H_ UmE
public final static int IMPROVED_QUICK = 6; KKeb ioW
public final static int MERGE = 7; T..N*6<X
public final static int IMPROVED_MERGE = 8; y1,?ZWTayr
public final static int HEAP = 9; ]y1$F Ir+
wQo6!H"K
public static void sort(int[] data) { ..P=D <'f
sort(data, IMPROVED_QUICK); Zd[y+$>
} +z]:CF
private static String[] name={ aJuj7y-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <3SFP3^:
}; 2 pM
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private static Sort[] impl=new Sort[]{ >:Rt>po8|w
new InsertSort(), Bo](n*i
new BubbleSort(), p`E|SNt/W
new SelectionSort(), zh#OD{
new ShellSort(), ue6/EN;}
new QuickSort(), ,$MWk(S
new ImprovedQuickSort(), Nt`F0 9S
new MergeSort(), Z/V`Z* fy
new ImprovedMergeSort(), UA69_E{JCH
new HeapSort() LW83Y/7
}; _/QKWk&j
*([0"
public static String toString(int algorithm){ )V[w:=*
return name[algorithm-1]; yiv RpSL
} Gx(KN57D
wf~5lpI[
public static void sort(int[] data, int algorithm) { :,h=2a_ 8
impl[algorithm-1].sort(data); {<- ouD
} Ak\D6eHcB
<'>d0:>N
public static interface Sort { 7':5
public void sort(int[] data); (]zl$*k
} k=h/i8i2z
5p]urfN-f
public static void swap(int[] data, int i, int j) { WryW3];0OR
int temp = data; )*^OPVt
data = data[j]; >j(I[_g
data[j] = temp; Q>SPV8s
} iGEQXIr3
} E i\J9zt