[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; JH#?}L/0Fe
} !}7m^
int i1=l; lY`<-`{I_
int i2=mid+1; j+/*NM_y3
for(int cur=l;cur<=r;cur++){ b<7f:drVC
if(i1==mid+1) ]42l:at
data[cur]=temp[i2++]; +3CMfYsr8
else if(i2>r) 7 >(ygu
data[cur]=temp[i1++]; sxtGl^,mU:
else if(temp[i1] data[cur]=temp[i1++]; 1L7,x @w
else 5K<C
data[cur]=temp[i2++]; z(qz(`eGC&
} ?CDq^)T[
} iI7~9SCE
i2E7$[
} e+TNG &_
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改进后的归并排序: Q!v[b{]8
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package org.rut.util.algorithm.support; kF .b)
dPId= w)
import org.rut.util.algorithm.SortUtil; 7(Kc9sJC%%
%|>i2
/** %#~Wk|8} Q
* @author treeroot 7&1: ]{_
* @since 2006-2-2 EK_^#b
* @version 1.0 sP%.o7&n
*/ >rubMGb
public class ImprovedMergeSort implements SortUtil.Sort { +l(}5(wc
3OlY Ml
private static final int THRESHOLD = 10; .MlE1n'
Z)%p,DiNM
/* e`^j_VnEH
* (non-Javadoc) |~Iw
* AP%h!b5v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ";]m]PRAam
*/ QTH yH
public void sort(int[] data) { ?%(*bRV -
int[] temp=new int[data.length]; b8&9pLl
mergeSort(data,temp,0,data.length-1); 6s;x@g]
} |(5=4j]
}: e9\r)
private void mergeSort(int[] data, int[] temp, int l, int r) { l<+k[@Vox
int i, j, k; 3Daq5(fLP
int mid = (l + r) / 2; xmDwoLU
if (l == r) m`~ Qr~
return; &0raa
if ((mid - l) >= THRESHOLD) FmPF7
mergeSort(data, temp, l, mid); H'2 =yhtVh
else ^E^:=Q?'_
insertSort(data, l, mid - l + 1); \z 'noc
if ((r - mid) > THRESHOLD) al/~
mergeSort(data, temp, mid + 1, r); c@`P{6
else Wj&s5;2a
insertSort(data, mid + 1, r - mid); F<[8!^l(z
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for (i = l; i <= mid; i++) { UpILr\3U
temp = data; Eh+lLtZ
} 9EEHLx"
for (j = 1; j <= r - mid; j++) { K4"as9oFP
temp[r - j + 1] = data[j + mid]; }O/Nn0,
} {8Ll\j@ "
int a = temp[l]; V|= 1<v
int b = temp[r]; Dts:$PlCk
for (i = l, j = r, k = l; k <= r; k++) { uw]Jm"=w
if (a < b) { ryN-d%t?
data[k] = temp[i++]; |dK-r
a = temp; /+u*9ZR&1
} else { 9YKEME+:
data[k] = temp[j--]; ^^m%[$nw&r
b = temp[j]; SzgVvmM}
} ctGjqHo
} SDkN
} myXV~6R 3
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/** vjpe'zx
* @param data l< Y x
* @param l PA E)3
* @param i L<:ya
*/ dx^3(#B
private void insertSort(int[] data, int start, int len) { yAOC<d9 E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (\j<`"n
} $aG'.0HW
} ]#nAld1cmy
} <FP-]R)
} Xp'KQ1w)
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堆排序： ^P[*yf
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package org.rut.util.algorithm.support; 7?Fl [FW$
;.Kzc3yz}
import org.rut.util.algorithm.SortUtil; v[x`I;
NoMC*",b>
/** 2}NfR8 N
* @author treeroot M`(xAVl
* @since 2006-2-2 sEoS[t|"
* @version 1.0 -Jhf]
*/ zMa`olTZ
public class HeapSort implements SortUtil.Sort{ `F)Iv:;y,
[f'7/w+
/* (non-Javadoc) =Zj9F1E[i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wdg[pt />
*/ 1||e!W
public void sort(int[] data) { V1ug.Jv^
MaxHeap h=new MaxHeap(); HV}NT~
h.init(data); Y !`H_Qo
for(int i=0;i h.remove(); ]C!u~A\jq
System.arraycopy(h.queue,1,data,0,data.length); 1yhx)m;f
} E_++yK^=
A#T;Gi
private static class MaxHeap{ ^C(AMT
_7Z$"
void init(int[] data){ t[<=QK
this.queue=new int[data.length+1]; M?,;TJ7Gd
for(int i=0;i queue[++size]=data; ;,viE~n
fixUp(size); :A[ Gtc(_
} (nBsf1l
} zmdOL9"a
.8"o&%$`V
private int size=0; {S|uQgs6j
2uB.0
private int[] queue; `p!.K9r7
4o%hH
public int get() { toF@@%
return queue[1]; pRC#DHcHh
} y"2c; *7[{
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public void remove() { *@O;IiSE
SortUtil.swap(queue,1,size--); 9qw~]W~Nm
fixDown(1); ^!A{ 4NV
} }Iu6]?|'
file://fixdown }RD,JgmV
private void fixDown(int k) { 6:e0?R^aD"
int j; }\1V;T
while ((j = k << 1) <= size) { pD){K
if (j < size %26amp;%26amp; queue[j] j++; zNBG;\W
if (queue[k]>queue[j]) file://不用交换 giI9-C
break; &=f%(,+
SortUtil.swap(queue,j,k); KVK@Snn
k = j; ~WVrtYJu
} ztu N0}'
} [\I\).
private void fixUp(int k) { P|G:h&
while (k > 1) { c0tv!PSw
int j = k >> 1; 9{+B lNZ
if (queue[j]>queue[k]) ?f a/}|T
break; towQoqv
SortUtil.swap(queue,j,k); f5'+F-`N
k = j; #*~#t4S-
} ^D!UF(H
} akaQ6DIdG
\;Ii(3+v;
} `AYHCn
HIF.;ImG^
} {~Phc 2z
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SortUtil： Rrsz{a
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package org.rut.util.algorithm; &Uzg&eB
A H`6)v<f
import org.rut.util.algorithm.support.BubbleSort; /H}83 C
import org.rut.util.algorithm.support.HeapSort; ?:UDK?
import org.rut.util.algorithm.support.ImprovedMergeSort; vRm;H|[%S
import org.rut.util.algorithm.support.ImprovedQuickSort; ."9v1kW
import org.rut.util.algorithm.support.InsertSort; SV-pS>#
import org.rut.util.algorithm.support.MergeSort; *r[PZ{D+
import org.rut.util.algorithm.support.QuickSort; ;X\,-pjv
import org.rut.util.algorithm.support.SelectionSort; SC'fT!
import org.rut.util.algorithm.support.ShellSort; 1;SWfKU?.
c\n\gQ:LQ
/** `2{x8A
* @author treeroot tM~R?9OaJ
* @since 2006-2-2 ,*Sj7qb#
* @version 1.0 y+@7k3"
*/ =T!M`
public class SortUtil { =EFF2M`F
public final static int INSERT = 1; BsRxD9r
public final static int BUBBLE = 2; `NrxoU=
public final static int SELECTION = 3; ]Rz]"JZ\S
public final static int SHELL = 4; $dq R]'
public final static int QUICK = 5; e3&R3{
public final static int IMPROVED_QUICK = 6; {5:y,=Y
public final static int MERGE = 7; k|1/gd5
public final static int IMPROVED_MERGE = 8; 1H%LUA
public final static int HEAP = 9; c_+}`
vWwp'q
public static void sort(int[] data) { e;!si>N
sort(data, IMPROVED_QUICK); }VdohX-
} jeC3}BL}
private static String[] name={ DjtUX>e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1Qv5m^>vj
}; ]r{y+g|
Q R;Xj3]v
private static Sort[] impl=new Sort[]{ IrJCZsk
new InsertSort(), M~=9ym
new BubbleSort(), :4/RB%)"
new SelectionSort(), [.dF)I3
new ShellSort(), mm'Pe4*
new QuickSort(), EC|t4u3
new ImprovedQuickSort(), Wfz&:J#
new MergeSort(), e%SQ~n=H 9
new ImprovedMergeSort(), Q% )fuI
new HeapSort() dFK/
}; RoT}L#!!
N =)9O
public static String toString(int algorithm){ 89@gYA"Su
return name[algorithm-1]; YqrieDFay!
} ]^p6dbzWe
&+Xj%x.]
public static void sort(int[] data, int algorithm) { _|`S9Nms
impl[algorithm-1].sort(data); ,)|nxX
} {IJ,y27
rOEk%kJ
public static interface Sort { 8 YsDE_
public void sort(int[] data); wHvX|GwMv
} V`m'r+ Y
7NE"+EP\{2
public static void swap(int[] data, int i, int j) { Rra<MOR
int temp = data; ".Luc7
data = data[j]; C0Z mv
data[j] = temp; ~A(fn:d
} }$?xwcPU
} s,)Z8H