[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; *J~N
} #Z (B4YO
int i1=l; LI"ghz=F
int i2=mid+1; ;`s/|v
for(int cur=l;cur<=r;cur++){ ze!7qeW
if(i1==mid+1) </qXKEu`_
data[cur]=temp[i2++]; T4J(8!7
else if(i2>r) z1(rHJd
data[cur]=temp[i1++]; M nH4p
else if(temp[i1] data[cur]=temp[i1++]; g^4'42UX
else =#n|t[h-
data[cur]=temp[i2++]; A2*z
} NfDg=[FN[
} ndW??wiM
umSbxEZU@
} W@#)8];>
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改进后的归并排序: @<AyCaU`.
*,@dt+H!y
package org.rut.util.algorithm.support; ] 6M- s
F|%[s|s
import org.rut.util.algorithm.SortUtil; fZT=q^26
l*b3Mg
/** w+*Jl}&\
* @author treeroot nOp\43no
* @since 2006-2-2 fh}\#WE"
* @version 1.0 WPpl9)Qc
*/ }\P9$D+
public class ImprovedMergeSort implements SortUtil.Sort { EcBSi995dj
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private static final int THRESHOLD = 10; Lc0^I<Y
+hV7o!WxC
/* 56d,Sk)
* (non-Javadoc) $>]7NTP
* Rb|\!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1+.(N:) +
*/ "qR qEpD%
public void sort(int[] data) { OAR#* ~q
int[] temp=new int[data.length]; 7p@qzE
mergeSort(data,temp,0,data.length-1); /wH]OD{
} W32bBzhL
GC~Tfrf=r
private void mergeSort(int[] data, int[] temp, int l, int r) { T>.*c6I b
int i, j, k; Abd&p N
int mid = (l + r) / 2; -:AknQq
if (l == r) *<"xF'C
return; Xr6UN{_-
if ((mid - l) >= THRESHOLD) F{B__Kf
mergeSort(data, temp, l, mid); *:aJlvk
else Ql3hq.E
insertSort(data, l, mid - l + 1); ~t.*B& A
if ((r - mid) > THRESHOLD) E@Q+[~H}
mergeSort(data, temp, mid + 1, r); ^MKvZ DOP
else 9ZeTS~i
insertSort(data, mid + 1, r - mid); ~X*)gS-=
mp+ %@n.;
for (i = l; i <= mid; i++) { 4}gqtw:
temp = data; q.g<gu]
} L6J=m#Ld
for (j = 1; j <= r - mid; j++) { ^ejU=0+cN
temp[r - j + 1] = data[j + mid]; %Z}A+Rv+*m
} XGbtmmQG
int a = temp[l]; _U|s!60'
int b = temp[r]; |Q?IV5%$
for (i = l, j = r, k = l; k <= r; k++) { w8%<O^wN,
if (a < b) { 1|q$Wn:*
data[k] = temp[i++]; -c~nmPEG6
a = temp; {: T'2+OH>
} else { gH(,>}{^K
data[k] = temp[j--]; K8ecSs}}J
b = temp[j]; b'3w.%^
} (/-2bO
} /{."*jK
} <A;R%\V
w|OMT>.
/** v\'Eo*4
* @param data Pp*|EW 1
* @param l WIa4!\Ky!
* @param i `h+sSIko
*/ !X e
private void insertSort(int[] data, int start, int len) { pGc_Klq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %J5zfNe)&
} ^%VMp>s
} 4ac2^`
} FI`][&]V
} \/xWsbG\
f-E]!\Pg
堆排序： :-fCyF)EI
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package org.rut.util.algorithm.support; U^-:qT;CX
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import org.rut.util.algorithm.SortUtil; N2 wBH+3w
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/** }*4XwUM e
* @author treeroot D'$ki[{,
* @since 2006-2-2 vSb$gl5H
* @version 1.0 !iN=py
*/ d OQU#5
public class HeapSort implements SortUtil.Sort{ w4\b^iJz
f R$E*Jd
/* (non-Javadoc) /. k4Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d3v5^5kU
*/ \tc4DS
public void sort(int[] data) { l{[{pAm
MaxHeap h=new MaxHeap(); D1}Bn2BM$
h.init(data); E:a_f!
for(int i=0;i h.remove(); ,_,Z<X/
System.arraycopy(h.queue,1,data,0,data.length); T>7$<ulm
} \DI%/(?
9tDo5 29
private static class MaxHeap{ s.d }*H-o
d~M;@<eD
void init(int[] data){ M0YV Qa
this.queue=new int[data.length+1]; >`R}ulz)
for(int i=0;i queue[++size]=data; ebxpKtEC
fixUp(size); (RW02%`jjy
} iG()"^G
} ~>2@55wElp
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private int size=0; TPEg>[
i0; p?4`m
private int[] queue; *p0n{F9
3WZdP[o!
public int get() { ZV=O oLt,
return queue[1]; E%@,n9T~"
} 7D PKKvQ
e"Kg/*Ji1
public void remove() { `a2%U/U
SortUtil.swap(queue,1,size--); SIQ7oxS4
fixDown(1); q$6fb)2I]e
} @0H}U$l
file://fixdown 1AiqB Rs
private void fixDown(int k) { 8@pY:AY
int j; Y7g^ ?6
while ((j = k << 1) <= size) { lf3QMr+
if (j < size %26amp;%26amp; queue[j] j++; <Yif-9
if (queue[k]>queue[j]) file://不用交换 E_ #MQ;n
break; =m]|C1x
SortUtil.swap(queue,j,k); 5$9g4
k = j; ye!}hm=w
} lJ1_Zs `
} 0/z=G!z\
private void fixUp(int k) { JDeG@N$
while (k > 1) { hUN]Lm6M
int j = k >> 1; =8:m:Y&|`G
if (queue[j]>queue[k]) AWsy9
break; >1u!(-A
SortUtil.swap(queue,j,k); tl5}#uJ
k = j; Qa-]IKOs
} x$ z9:'U
} k@vN_Un
oRH]67(Z
} 4JV/Ci5
- "`5r6
} HQqnJ;ns<
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SortUtil： LE$_qX`L
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package org.rut.util.algorithm; |-t>_+. J'
1o5n1 A
import org.rut.util.algorithm.support.BubbleSort; hr9rI
import org.rut.util.algorithm.support.HeapSort; qbcaiU`-^"
import org.rut.util.algorithm.support.ImprovedMergeSort; r: Ij\YQ
import org.rut.util.algorithm.support.ImprovedQuickSort; 2GB)K?1M
import org.rut.util.algorithm.support.InsertSort; 6xI9%YDy
import org.rut.util.algorithm.support.MergeSort; 2UqLV^ZY
import org.rut.util.algorithm.support.QuickSort; EMK>7 aks
import org.rut.util.algorithm.support.SelectionSort; B. '&[A
import org.rut.util.algorithm.support.ShellSort; "*E06=fiG
mY!os91KoO
/** =SMI,p&
* @author treeroot -CePtq`
* @since 2006-2-2 .&Tcds
* @version 1.0 ++{,1wY\
*/ g>].m8DZ'
public class SortUtil { /*Xr^X6
public final static int INSERT = 1; ?VUW.-
public final static int BUBBLE = 2; 2L?jp:$;X
public final static int SELECTION = 3; }_,1i3Rip
public final static int SHELL = 4; W%$sA}O
public final static int QUICK = 5; i b$2qy
public final static int IMPROVED_QUICK = 6; |KH981
public final static int MERGE = 7; }C6RgE.6<
public final static int IMPROVED_MERGE = 8; ]nmVT~lBe"
public final static int HEAP = 9; =Rv!c+?
Q)vf>LwC2S
public static void sort(int[] data) { )o4B^kq
sort(data, IMPROVED_QUICK); ,dyCuH!B
} %4
private static String[] name={ {|:ro!&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @ ={Hx$zL
}; j_w"HiNBA
f&5'1tG
private static Sort[] impl=new Sort[]{ cviPCjM
new InsertSort(), kF,_o/Jc
new BubbleSort(), Cf&.hod
new SelectionSort(), qGezmkNFm
new ShellSort(), QY)hMo=|o8
new QuickSort(), R#8.]
new ImprovedQuickSort(), Z@i"/~B|4\
new MergeSort(), pGO=3=O
new ImprovedMergeSort(), J%9)&aW
new HeapSort() yxz)32B?
}; Wra$
Xu[(hT6
public static String toString(int algorithm){ qhE1 7Hf
return name[algorithm-1]; 816OV
} ph5rS<
CN(}0/
public static void sort(int[] data, int algorithm) { Dej_(Dz_S
impl[algorithm-1].sort(data); 4 C7z6VWg
} LN!e_b
V1h&{D\"
public static interface Sort { o$4xinK
public void sort(int[] data); )P|&o%E
} tV'>9YVdG
F0i`HO{
public static void swap(int[] data, int i, int j) { A3su!I2S
int temp = data; *PSUB{i(
data = data[j]; ~d.Z.AD
data[j] = temp; qL;T^ljP
} ?q lpi(
} B)!ty"