[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; KAO}*?
} Hvnak{5
int i1=l; JOx75}
int i2=mid+1; s"=e(ob
for(int cur=l;cur<=r;cur++){ uZW ?0W
if(i1==mid+1) U]@t\T3W
data[cur]=temp[i2++]; |bVNlL"xN
else if(i2>r) nZ$,Bjb
data[cur]=temp[i1++]; >OBuHqC
else if(temp[i1] data[cur]=temp[i1++]; U3&*,xeU@H
else 4;7<)&#h
data[cur]=temp[i2++]; >8#(GXnSt
} o.Mb~8Yu
} #Jq@p_T"
-$.$6"]
} cSnm\f
k9w<0h3
改进后的归并排序: =uYSZR
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package org.rut.util.algorithm.support; iePpJ>(
eWhv X9 <
import org.rut.util.algorithm.SortUtil; ?A8Uf=
N?p9h{DG
/** |rq~.cA
* @author treeroot Sr,ZM1J
* @since 2006-2-2 i('z~
* @version 1.0 6<(HT#=#
*/ (|I0C 'Ki
public class ImprovedMergeSort implements SortUtil.Sort { ;^=eiurv
bXQ(6P
private static final int THRESHOLD = 10; ~lzV=c$t
>hRYsWbmg
/* FwBktuS
* (non-Javadoc) ST'L \yebc
* 'B8fc-n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +)qPUKb?
*/ ad&Mk^p
public void sort(int[] data) { oB&s2~
int[] temp=new int[data.length]; XaR(q2s
mergeSort(data,temp,0,data.length-1); S2*-UluG
} H*A)U'`
s<sqO,!
private void mergeSort(int[] data, int[] temp, int l, int r) { <Lyz7R6
int i, j, k; 1Yz1/gFj
int mid = (l + r) / 2; _U.8\J2
if (l == r) +`mJh\*
return; 3S_KycE{
if ((mid - l) >= THRESHOLD) Yu9Ccj`
mergeSort(data, temp, l, mid); g5M-Vu
else |2 g }i\
insertSort(data, l, mid - l + 1); WLDt5R
if ((r - mid) > THRESHOLD) b0rC\^x
mergeSort(data, temp, mid + 1, r); A:cc @ku
else z }R-J/xr2
insertSort(data, mid + 1, r - mid); Q5Y4@
@Ys(j$U't
for (i = l; i <= mid; i++) { TAi |]U!
temp = data; wAVO%8u
} :kOLiko!4>
for (j = 1; j <= r - mid; j++) { SdnqM`uFo
temp[r - j + 1] = data[j + mid]; aS'G&(_
} DJr 8<u
int a = temp[l]; ''?.6r
int b = temp[r]; ~N>[7I"*
for (i = l, j = r, k = l; k <= r; k++) { 3-hu'xSU
if (a < b) { G"O%u|7
data[k] = temp[i++]; $QNfy.6Tn
a = temp; s,]6Lri`\
} else { nC_<pq^tr
data[k] = temp[j--]; vF]?i
b = temp[j]; TJ?}5h5
} ]m=* =LLC
} R)nhgp(~
} Mf%/t HK
/fBZRdB
/** wI#rAx7f-
* @param data (x&#>5
* @param l 3543[W#a
* @param i {pd%I
*/ <*8nv.PX*
private void insertSort(int[] data, int start, int len) { QbV)+7II=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v?K XTc%Z
} lU:z>gC
} uQ5NN*C=
} TN7kt]a2
} O<L/m[]
SKD!V6S
堆排序： o7DDL{iR/
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package org.rut.util.algorithm.support; 4{}u PbS
NO`LSF
import org.rut.util.algorithm.SortUtil; tN3Xn]
iBV*GW
/** A;SRm<,
* @author treeroot jMW|B
* @since 2006-2-2 87YT;Z;U&
* @version 1.0 ?rk3oa-
*/ unSF;S<
public class HeapSort implements SortUtil.Sort{ &|n*&@fF
Af5In9WB5
/* (non-Javadoc) A!Xn^U*p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y;;^o6Gnw
*/ w{I60|C]*
public void sort(int[] data) { Q]{DhDz?+
MaxHeap h=new MaxHeap(); [9[tn-
h.init(data); _^#PV}
for(int i=0;i h.remove(); $`{}4,5M
System.arraycopy(h.queue,1,data,0,data.length); 3|P P+<o
} wUh'1D<(r
;6fkG/T
private static class MaxHeap{ je_77G(F
v*FCE 1HI
void init(int[] data){ S9U9;>g
this.queue=new int[data.length+1]; Nf<([8v;t
for(int i=0;i queue[++size]=data; JeWW~y`e?{
fixUp(size); ZZ[5Z=te?
} @^k$`W;
} :_)Xe*O
%#/7Tl:
private int size=0; zh*NRN
CDU^X$Q
private int[] queue; Gx'mVC"{
2=["jP!B
public int get() { BCsW03sQ
return queue[1]; 90K&s#+13
} wy:.
2s|[!:L5
public void remove() { R0oP##]
SortUtil.swap(queue,1,size--); @>X."QbE
fixDown(1); &EA4`p
} )oAK)e
file://fixdown pf] sL/g
private void fixDown(int k) { Kc{fT^E
int j; >"zSW?
while ((j = k << 1) <= size) { 1ub03$pL;
if (j < size %26amp;%26amp; queue[j] j++; h=d&@k\g
if (queue[k]>queue[j]) file://不用交换 xCoQ>.4p
break; o] )qv~o)
SortUtil.swap(queue,j,k); VNXB7#ry
k = j; ~[k2(
} CIO&VK
} `lcpUWn
private void fixUp(int k) { ZuBVq
while (k > 1) { K'1rS[^>R
int j = k >> 1; {{@3r5KGl
if (queue[j]>queue[k]) 1xT^ ,e6
break; Rqvm%sAi
SortUtil.swap(queue,j,k); +c\fDVv
k = j; Fc 5g~T
} `P :-a7_
} m(*CuM[E
(doFYF~w
} G>*s+
ywi Shvi8
} RX7,z.9@'O
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SortUtil： }v=q6C#Q>
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package org.rut.util.algorithm; 7th&C,c&
~3/>;[!
import org.rut.util.algorithm.support.BubbleSort; 0($MN]oZa
import org.rut.util.algorithm.support.HeapSort; 15Yy&9D
import org.rut.util.algorithm.support.ImprovedMergeSort; s- g[B(
import org.rut.util.algorithm.support.ImprovedQuickSort; JMO"(?
import org.rut.util.algorithm.support.InsertSort; V, )kw{](
import org.rut.util.algorithm.support.MergeSort; Z{u*vUC&
import org.rut.util.algorithm.support.QuickSort; VpTp*[8O
import org.rut.util.algorithm.support.SelectionSort; ]J_Dn\
import org.rut.util.algorithm.support.ShellSort; 2E=E!Zwt_
< 8WS YZ
/** (_U&EX%
* @author treeroot N @]*E
* @since 2006-2-2 lyv9eM
* @version 1.0 1)%9h>F7
*/ ?$=N!>P#
public class SortUtil { )M'#l<9B
public final static int INSERT = 1; }{]{`\
public final static int BUBBLE = 2; $zxCv7
public final static int SELECTION = 3; U/0NN>V
public final static int SHELL = 4; "QGP]F
public final static int QUICK = 5; fv<($[0
public final static int IMPROVED_QUICK = 6; Lrr6z05FQ
public final static int MERGE = 7; B6$s*SXNp
public final static int IMPROVED_MERGE = 8; ]yCmGt+b
public final static int HEAP = 9; }b6ja y
b>I -4
public static void sort(int[] data) { $~zqt%}
sort(data, IMPROVED_QUICK); r(i<H%"Z
} :^J(%zy
private static String[] name={ '<4OA!,^)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d3^LalAp
}; Ha4?I$'$
Hdj0! bUx
private static Sort[] impl=new Sort[]{ Hsx`P
new InsertSort(), 36&7J{MU
new BubbleSort(), @: %}clZ
new SelectionSort(), tEBf2|<
new ShellSort(), +>c)5Jih
new QuickSort(), pEhWgCL
new ImprovedQuickSort(), !Bu<6
new MergeSort(), <f{m=Dc
new ImprovedMergeSort(), w;r-TLf
new HeapSort() ?ew^%1!W.
}; f,`FbT
3cQTl5,
public static String toString(int algorithm){ CaZEU(i
return name[algorithm-1]; C+-~Gmrb(7
} H-7*)D
lE=Q(QUr
public static void sort(int[] data, int algorithm) { ]#S.L'
impl[algorithm-1].sort(data); \p [!@d^
} _RY<-B
LdVGFlcXi
public static interface Sort { r")=Z1y
public void sort(int[] data); ^'v6 ,*:4
} YgdoQBQ
,|xG2G6
public static void swap(int[] data, int i, int j) { URJ"
int temp = data; "wexG]R=5
data = data[j]; |K/#2y~
data[j] = temp; P|_?{1eO2
} 5\EHu8
} 83;1L:}`