[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; l@~1CMyN
} 8x!+tw7
int i1=l; %_]=i@Y~
int i2=mid+1; d'x<-l9
for(int cur=l;cur<=r;cur++){ JTSq{NN
if(i1==mid+1) Bm65W
data[cur]=temp[i2++]; 782[yLyv
else if(i2>r) u-8X$aJ
data[cur]=temp[i1++]; XhQw+j~1.
else if(temp[i1] data[cur]=temp[i1++]; k'6<jEbk
else 16a_GwfM
data[cur]=temp[i2++]; j` [#Ij
} aW52.X z%8
} R>/QARX
Gr`MGQ,
} ^zBjG/'7
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改进后的归并排序: P-/XYZ]`
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package org.rut.util.algorithm.support; B"pFJ"XR
<^H1)=tlF
import org.rut.util.algorithm.SortUtil; ]+^;vc 1r
"R@$Wu53|
/** Fw(b1d>E
* @author treeroot v9j4|w
* @since 2006-2-2 */0vJz%<.M
* @version 1.0 d,GtH)(s
*/ bLU^1S8Z
public class ImprovedMergeSort implements SortUtil.Sort { ;'2`M
f:x9Y{Y
private static final int THRESHOLD = 10; o(Ua",|
]Ssw32yn
/* PK:o}IWn~x
* (non-Javadoc) C8bGae(
* [H6X2yjj|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0?J|C6XM#4
*/ kT Z?+hx
public void sort(int[] data) { +d6Aw}*
int[] temp=new int[data.length]; 7- *(a
mergeSort(data,temp,0,data.length-1); cJ7{4YK_#/
} 4~m.#6MT
2$j Ot}
private void mergeSort(int[] data, int[] temp, int l, int r) { [9db=$v8$
int i, j, k; RTPq8S"
int mid = (l + r) / 2; 2yEO=SN,(
if (l == r) zAkc67:
return; 8xD<A|
if ((mid - l) >= THRESHOLD) -H ac^4uF
mergeSort(data, temp, l, mid); >m2<Nl}
else @dWS*@
insertSort(data, l, mid - l + 1); ZuFVtW@
if ((r - mid) > THRESHOLD) dIBKE0`
mergeSort(data, temp, mid + 1, r); %ojR?=ON
else @^y?Bh9jQ
insertSort(data, mid + 1, r - mid); _v~D{H&}
!ho5VAt
for (i = l; i <= mid; i++) { 3gPD(r1g
temp = data; +s/N@]5nW
} Dh!iY0Lz
for (j = 1; j <= r - mid; j++) { 1{hoO<CJ
temp[r - j + 1] = data[j + mid]; ATMogxh
} f'zU^/$rf
int a = temp[l]; !UgUXN*
int b = temp[r]; #2lvfR|
for (i = l, j = r, k = l; k <= r; k++) { n ]6 0
if (a < b) { 9znx1AsN
data[k] = temp[i++]; .5KC'?
a = temp; \AtwO
} else { JXSqtk=
data[k] = temp[j--]; z|DA _dG
b = temp[j]; v]`A_)[
} ;}>g1&q
} C#**)
} i_E#cU
]"7DV3_
/** YPff)0Nh
* @param data {YKMQI^O/
* @param l wc+N
* @param i ^ ]6 80h
*/ x@ s`;qz
private void insertSort(int[] data, int start, int len) { OJ_2z|f<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uuUVE/^V'
} =@Nv:1:r
} X%9xuc
} q@MjeGs%
} :oj) eS[Y
jC Kt;lj
堆排序： d-N"mI-
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package org.rut.util.algorithm.support; " ;R3260
$vGEY7,
import org.rut.util.algorithm.SortUtil; J_wz'eIb0
+}-W.H%`0
/** \2<yZCn
* @author treeroot xu?QK6D:
* @since 2006-2-2 b%!`fn-;
* @version 1.0 DN8pJa
*/ <9k}CXv2PK
public class HeapSort implements SortUtil.Sort{ J,=E5T}U^
7SY->-H8
/* (non-Javadoc) 4Ig{#}<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <9@]|
*/ x&fCe{5
public void sort(int[] data) { [aS)<^
MaxHeap h=new MaxHeap(); w%o4MFK=!
h.init(data); TnU$L3k
for(int i=0;i h.remove(); gAUQQ
System.arraycopy(h.queue,1,data,0,data.length); sV'.Bomq
} POg0=32
!zkEh9G
private static class MaxHeap{ x>9EVa)
MqBATW.pmJ
void init(int[] data){ z3jzpmz
this.queue=new int[data.length+1]; &'yV:g3H
for(int i=0;i queue[++size]=data; .9fluAG
fixUp(size); "A1yqK
} Jx9%8Ek
} &CmkNm_B
K9M.+d4
private int size=0; |AfQ_iT6c
.x$T al
private int[] queue; u[|S*(P
QRHm|f9_C
public int get() { 8'xnhV
return queue[1]; PZhZK VZx
} JiLrwPex[
Mh.eAM8_
public void remove() { 5)v^ cR?&
SortUtil.swap(queue,1,size--); %=<NqINM[
fixDown(1); g)D}p@>m
} RMt vEa
file://fixdown Ng39D#_)
private void fixDown(int k) { 9la~3L_g
int j; coVT+we
while ((j = k << 1) <= size) { \q1%d.\X
if (j < size %26amp;%26amp; queue[j] j++; 2,Dc]oj
if (queue[k]>queue[j]) file://不用交换 lKwT5ma7
break; d lLk4a+
SortUtil.swap(queue,j,k); RTY4%6]O
k = j; BrcXn@tl
} >T^v4A
} KdpJ[[Ug/
private void fixUp(int k) { 9qy 9
while (k > 1) { *K.7Zf0
int j = k >> 1; nJ})6/gK
if (queue[j]>queue[k]) (g:W|hS
break; K y2xWd8
SortUtil.swap(queue,j,k); o5x^"#
k = j; E d/O\v@
} 7[1 R}G V
} gj;G:;1m
<d`UifqD
} c qyh#uWe
:|Nbk58
} F X2`p_
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SortUtil： CHw_?#h
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package org.rut.util.algorithm; z))[Lg
8J1.(Mwb?
import org.rut.util.algorithm.support.BubbleSort; EoCwS
import org.rut.util.algorithm.support.HeapSort; .T-p]9*p
import org.rut.util.algorithm.support.ImprovedMergeSort; p&l:937
import org.rut.util.algorithm.support.ImprovedQuickSort; ZSt ww{Z
import org.rut.util.algorithm.support.InsertSort; becQ5w/~
import org.rut.util.algorithm.support.MergeSort; K3D $ hb
import org.rut.util.algorithm.support.QuickSort; "TJ^Z!
import org.rut.util.algorithm.support.SelectionSort; Tic9ri
import org.rut.util.algorithm.support.ShellSort; @+#p:sE
K!gFD
/** yuX0Y{:I
* @author treeroot qW>J-,61/
* @since 2006-2-2 GTNTx5H
* @version 1.0 [KJL%u|8/
*/ :+!b8[?Z
public class SortUtil { 4O^1gw
public final static int INSERT = 1; Nq6CvDXi
public final static int BUBBLE = 2; FQ)Ekss~C
public final static int SELECTION = 3; ttVSgKAsm
public final static int SHELL = 4; 9ksrr{tW
public final static int QUICK = 5; Ft!~w#&-
public final static int IMPROVED_QUICK = 6; B4ze$#
public final static int MERGE = 7; ?%ntO]
public final static int IMPROVED_MERGE = 8; [rsAY&.
public final static int HEAP = 9; 0O4mA&&!oK
nHjwT5Q+Q
public static void sort(int[] data) { \s'6)_
sort(data, IMPROVED_QUICK); ^]gl#&"D
} tH(#nx8
private static String[] name={ {rLOAewr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _4Pi>
}; IPR396J+-
mH .I!
private static Sort[] impl=new Sort[]{ Z4' v
new InsertSort(), .X1niguXH
new BubbleSort(), `,[c??h
new SelectionSort(), B.#0kjA}
new ShellSort(), p<34}iZ
new QuickSort(), #u@!O%MJ
new ImprovedQuickSort(), IRa*}MJe
new MergeSort(), -NeF6
new ImprovedMergeSort(), FG\?_G
new HeapSort() q%Pnx_RB
}; W9~datIh>
OQvJdjST
public static String toString(int algorithm){ WgB,,L,
return name[algorithm-1]; w"|c;E1;_
} Ipx:k+J
_P:P5H8
public static void sort(int[] data, int algorithm) { r_m&Jl@4
impl[algorithm-1].sort(data); fHi+PEbR
} qFk(UazN
^*OA%wg3=h
public static interface Sort { &IYkeGQr
public void sort(int[] data); /o2eKx
} \ PqV|
:e;fs.C
public static void swap(int[] data, int i, int j) { t {}1f
int temp = data; H@:@zD!G[
data = data[j]; :JYOC+#q7
data[j] = temp; l-rnDl
} kn.z8%^(
} L z