[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; .gZ1}2GF=
} )4h4ql W
int i1=l; mn5y]:;`
int i2=mid+1; Rr>nka)U
for(int cur=l;cur<=r;cur++){ < cNJrer
if(i1==mid+1) Uwj|To&QR
data[cur]=temp[i2++]; Ife/:v
else if(i2>r) D==C"}J
data[cur]=temp[i1++]; 6ZvGD}/
else if(temp[i1] data[cur]=temp[i1++]; o$PY0~#
else |HT5G=dw
data[cur]=temp[i2++]; >;wh0dBe
} o:oQF[TcFO
} ),DLrGOl
@\ udaZc
} o03Y w)*
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改进后的归并排序: ;ZOu-B]q
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package org.rut.util.algorithm.support; 4i]h0_]
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import org.rut.util.algorithm.SortUtil; @Z}TF/Rx4
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/** ^T>P
* @author treeroot %s&"gWi
* @since 2006-2-2 :v$][jZ2
* @version 1.0 nF"NXYa
*/ 5t=7-
public class ImprovedMergeSort implements SortUtil.Sort { msf%i!
@$G{t^&os
private static final int THRESHOLD = 10; Ms>CO7Nvy
TzSEQS{
/* -] @cUx
* (non-Javadoc) NeI#gJ1A
* HpCTQ\H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W!Qaa(o?
*/ h^ o@=%b
public void sort(int[] data) { 5rX_85]
int[] temp=new int[data.length]; |3]#SqX
mergeSort(data,temp,0,data.length-1); #(Xv\OE
} AHB_[i'>7
]a=n(`l?
private void mergeSort(int[] data, int[] temp, int l, int r) { ro}WBv
int i, j, k; #[odjSb
int mid = (l + r) / 2; $j(laD#AR
if (l == r) ]H {g/C{j
return; QgF2f/;!
if ((mid - l) >= THRESHOLD) #MyF 1E
mergeSort(data, temp, l, mid); 8wH1x .
else }uFV\1
insertSort(data, l, mid - l + 1); \281X
if ((r - mid) > THRESHOLD) kac-@
mergeSort(data, temp, mid + 1, r); i;l0)q
else DeK&_)g| Z
insertSort(data, mid + 1, r - mid); ->9waXRDz)
tO}Y=kZa{
for (i = l; i <= mid; i++) { NG+%H1!$_
temp = data; }q?*13iy(
} };m.8(}$)
for (j = 1; j <= r - mid; j++) { ^ }kqAmr
temp[r - j + 1] = data[j + mid]; #Fkn-/nL
} G=(ja?d
int a = temp[l]; QHHj.ZY
int b = temp[r]; 3UgPVCT
for (i = l, j = r, k = l; k <= r; k++) { 1sNZl&
if (a < b) { ]K-B#D{P
data[k] = temp[i++]; tBjMm8lgb
a = temp; WupONrH1e
} else { $?*XPzZ
data[k] = temp[j--]; Q$^)z_jai
b = temp[j]; -n"7G%$M
} i|!D
} W.sH
} /Z1>3=G by
!QsmT3
/** {>h,@
* @param data Dzr(Fb
* @param l iezY+`x4
* @param i ?mbI6fYv
*/ *r/o \pyH
private void insertSort(int[] data, int start, int len) { jBr3Ay@<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .22}=z
} 'GF<_3I2l
} BK 9+fO
} dF+R q|n{
} mV;)V8'
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堆排序： tGwQUn
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package org.rut.util.algorithm.support; 3J}/<&wv
zgPUW z X=
import org.rut.util.algorithm.SortUtil; }JM02R~I
i*61i0
/** Tqm)-|[
* @author treeroot jRBKy8?[C
* @since 2006-2-2 S<o\.&J
* @version 1.0 \E8CC>Jd
*/ ./_4D}
public class HeapSort implements SortUtil.Sort{ RD6`b_]o
UNCI"Mjb
/* (non-Javadoc) XQStlUw8+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t@cImmh\T
*/ /g\m7m)u
public void sort(int[] data) { !{S HlS
MaxHeap h=new MaxHeap(); &eFv~9
h.init(data); *n*po.Xr
for(int i=0;i h.remove(); {SwvUWOf"
System.arraycopy(h.queue,1,data,0,data.length); *kq>Z 06'i
} 8z`Ne(h;
A)HV#T`N
private static class MaxHeap{ ;@/vKA3l.
iu+rg(*%
void init(int[] data){ iX6'3\Q3A
this.queue=new int[data.length+1]; #vPf$y6jCI
for(int i=0;i queue[++size]=data; iUOGuiP
fixUp(size); [J6q(}f
} 4*?JU v
} ^~DClZ
>mp"=Y
private int size=0; s}Q*zy
2X`5YN;
private int[] queue; mApl}I
%)}y[ (
public int get() { %R-KkK<S
return queue[1]; A08{]E#v>
} KBa
+7$zL;ph=n
public void remove() { e)kVS}e?
SortUtil.swap(queue,1,size--); vFH1hm
fixDown(1); D`@*udn=
} dL|*#e
file://fixdown ='vkd=`Si
private void fixDown(int k) { t4FaU7
int j; 89l{h8R
while ((j = k << 1) <= size) { !--A"
if (j < size %26amp;%26amp; queue[j] j++; 4qg] oiT
if (queue[k]>queue[j]) file://不用交换 !~a1xI~s
break; 1'YksuYx6f
SortUtil.swap(queue,j,k); $?dutbE
k = j; #RVN7-x
} >@i{8AD
} ">'`{mXew
private void fixUp(int k) { $v~I n
while (k > 1) { tN&_f==e
int j = k >> 1; lPOcX'3\
if (queue[j]>queue[k]) 5 $: q
break; S#f}mb0,
SortUtil.swap(queue,j,k); ca?;!~%zA
k = j; &46Ro|XE`
} JB(P-Y#yyA
} {, zg
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} TI^M9;b
U(u$5
} )@\m0bnF
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SortUtil： YRs32vVz
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package org.rut.util.algorithm; Q(7M_2e7
.80L>0
import org.rut.util.algorithm.support.BubbleSort; @Yy']!Ju
import org.rut.util.algorithm.support.HeapSort; t9+ME|
import org.rut.util.algorithm.support.ImprovedMergeSort; r-IG.ym3
import org.rut.util.algorithm.support.ImprovedQuickSort; *u?N{LkqS
import org.rut.util.algorithm.support.InsertSort; /6d:l>4
import org.rut.util.algorithm.support.MergeSort; >2@ a\
import org.rut.util.algorithm.support.QuickSort; ;OY*`(Id
import org.rut.util.algorithm.support.SelectionSort; N77EM
import org.rut.util.algorithm.support.ShellSort; $][$ e
kKil]L
/** " H;iAv
* @author treeroot +Rb0:r>kU
* @since 2006-2-2 aIW W[xZ
* @version 1.0 P},d`4Ty@
*/ {fAj*,pzl
public class SortUtil { fY{&W@#g
public final static int INSERT = 1; 'k9dN \ev
public final static int BUBBLE = 2; (b4;c=<[{
public final static int SELECTION = 3; @gHWU>k,A
public final static int SHELL = 4; - |j4u#z
public final static int QUICK = 5; TWk1`1|
public final static int IMPROVED_QUICK = 6; kG70j{gf
public final static int MERGE = 7; [t}$W*hY
public final static int IMPROVED_MERGE = 8; okv`v ({
public final static int HEAP = 9; Fu6~8uDV{{
CxW-lU3G`
public static void sort(int[] data) { 7d"gRM;
sort(data, IMPROVED_QUICK); 3^J~ts{*
} 1E|~;wo\
private static String[] name={ hY-;Vh0J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LAfv1
}; c DO<z
|jwN8@
private static Sort[] impl=new Sort[]{ E]26a,^L
new InsertSort(), XI*cu\7sy
new BubbleSort(), 6fr@y=s2:
new SelectionSort(), Bm&%N?9
new ShellSort(), S|HnmkV66
new QuickSort(), ZQQ0}
new ImprovedQuickSort(), Rr0@F`"R
new MergeSort(), A/+bwCDP
new ImprovedMergeSort(), HLml:B[F(
new HeapSort() O.g!k"nas&
}; Jf|6 FQo&
fR6.:7&
public static String toString(int algorithm){ DHnu F@M
return name[algorithm-1]; {f kP|d
} 9V5d=^
wqyrs|P
public static void sort(int[] data, int algorithm) { TaN]{k
impl[algorithm-1].sort(data); -g;cg7O#(
} a6&+>\o
K@UQ O
public static interface Sort { s wIJmA
public void sort(int[] data); KL}o%wfLy
} Im*~6[
Z<,$XvL
public static void swap(int[] data, int i, int j) { ?U;KwS]%
int temp = data; D+"-(k
data = data[j]; 'QrvkQ
data[j] = temp; [c=T)]E1
} ].C4RH
} Q-:IE T