[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; 1uKIO{d@
} ,+h<qBsV@
int i1=l; >jTiYJI_M
int i2=mid+1; CXz9bhn<4
for(int cur=l;cur<=r;cur++){ FcZ)^RQ4G
if(i1==mid+1) reYIF*
data[cur]=temp[i2++]; hMS:t(N{
else if(i2>r) <liprUFsn
data[cur]=temp[i1++]; A@d 2Ukv
else if(temp[i1] data[cur]=temp[i1++]; Wql=PqF
else vNdX
data[cur]=temp[i2++]; N:pP@o
} RZq_}-P,.c
} (Lh!7g/0N
eS4t0`kP
} VE/m|3%t
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改进后的归并排序: Jc5YGj7
N|@tP:j
package org.rut.util.algorithm.support; @QnKaZ8jW
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import org.rut.util.algorithm.SortUtil; 99'c\[fd'
[K4k7$
/** .)%,R
* @author treeroot ~^'t70 :D
* @since 2006-2-2 ,+v(?5[6
* @version 1.0 x@O)QaBN!
*/ (Lj*FXmz
public class ImprovedMergeSort implements SortUtil.Sort { ^jpQfDe6
iDgc$'%?
private static final int THRESHOLD = 10; -R];tpddR5
G i(
/* Cl&)#
* (non-Javadoc) 4/3w *
* \f Kn} ]kG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ei1;@k/
*/ +5R8mbD!
public void sort(int[] data) { n) HV:8j~
int[] temp=new int[data.length]; 4XiQ8"C
mergeSort(data,temp,0,data.length-1); %Y#W#G
} q`z1ht nf
fU%Mz\t
private void mergeSort(int[] data, int[] temp, int l, int r) { wNFx1u^/)
int i, j, k; >XuPg(Ow
int mid = (l + r) / 2; }9z$72;Qdq
if (l == r) Lq6nmjL
return; ~SA>$
if ((mid - l) >= THRESHOLD) bh\2&]Di/
mergeSort(data, temp, l, mid); ;Tq4!w'rH
else apM)$
insertSort(data, l, mid - l + 1); [?,+DY
if ((r - mid) > THRESHOLD) #\xy,C'Y
mergeSort(data, temp, mid + 1, r); 4v5qK
else SjA'<ZX>TM
insertSort(data, mid + 1, r - mid); QiVKaBS8
+yk0ez
for (i = l; i <= mid; i++) { l;aO"_E1m
temp = data; {m,LpI0wG
} ]*)l_mut7
for (j = 1; j <= r - mid; j++) { +>u 8r&Jw.
temp[r - j + 1] = data[j + mid]; QJx<1#
} #!yX2lR
int a = temp[l]; .p'McCV=
int b = temp[r]; [;D1O;c'W.
for (i = l, j = r, k = l; k <= r; k++) { W_/$H_04+
if (a < b) { hQL@q7tUr
data[k] = temp[i++]; +zo\#8*0MF
a = temp; jzi^OI7
} else { Yyw3+3
data[k] = temp[j--]; j#p3<V S4
b = temp[j]; C4-%|+Q i
} 9&B#@cw
} qI74a F
} Pum&\.l
Y~#.otBL&
/** w; f LnEz_
* @param data 28}L.>5k
* @param l mv$gL
* @param i {Ov{O,c5
*/ &f)pU>Di
private void insertSort(int[] data, int start, int len) { G/(tgQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wIF'|"
} n7n-uc
} K}whqe]j
} Rp_}_hL0
} 0Uk;&a0s
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堆排序： v.,D,6qZ
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package org.rut.util.algorithm.support; LiGECqWBa'
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import org.rut.util.algorithm.SortUtil; Z)u_2e
+&M>J|
/** x;STt3M~
* @author treeroot 9r8bSV3`
* @since 2006-2-2 a?W<<9]
* @version 1.0 {G|= pM\'
*/ H:16aaMn(
public class HeapSort implements SortUtil.Sort{ .NF3dC\
`'bu8JK
/* (non-Javadoc) 1u }2}c|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uXG$YDKqC
*/ sbhUW>%.
public void sort(int[] data) { C,<FV+r=^
MaxHeap h=new MaxHeap(); uCWBM
h.init(data); [raj: 7yQ
for(int i=0;i h.remove(); S\k(0Sv9D
System.arraycopy(h.queue,1,data,0,data.length); _.W;hf`
} h}oV)z6
%;GRR (K
private static class MaxHeap{ #Qu|9Q[QH
+ul.P)1J6
void init(int[] data){ ,C'mE''x
this.queue=new int[data.length+1]; `yRt?UQRS
for(int i=0;i queue[++size]=data; rPifiLl A>
fixUp(size); R!x /,6,_
} PnI_W84z
} +' .o
{Sc*AE&Y
private int size=0; .SWn/Kk
OZ<fQf.Gh}
private int[] queue; B/JMH 1r
MBol_#H
public int get() { O&dh<
return queue[1]; W#x~x|(c
} HJe6h. P
Fa X3@Sd!
public void remove() { 0v3 8LBH)
SortUtil.swap(queue,1,size--); '|yBz1uL
fixDown(1); j4(f1
} VY!A]S"
file://fixdown _Vt CC/
private void fixDown(int k) { ^/$U(4
int j; 2(9~G|C.
while ((j = k << 1) <= size) { 07,&weQ
if (j < size %26amp;%26amp; queue[j] j++; "haJwV6-
if (queue[k]>queue[j]) file://不用交换 T&E'MB
break; &w^:nVgl
SortUtil.swap(queue,j,k); #<-%%
k = j; *Oh]I|?
} ;,@Fz
} YJZ`Clp?
private void fixUp(int k) { AnBD~h h
while (k > 1) { +3R/g@n
int j = k >> 1; _U~~[I
if (queue[j]>queue[k]) &&sm7F%
break; {>X2\.Rl
SortUtil.swap(queue,j,k); q9$K.=_5
k = j; (^)(#CxO
} };>~P%u32
} <EuS6Pg
8;(3fSNC
} ]_! .xx>
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} &?APY9\.
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SortUtil： DC'L-]#<
9u_D@A"aC`
package org.rut.util.algorithm; G4n-}R&'
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import org.rut.util.algorithm.support.BubbleSort; F||oSJrI
import org.rut.util.algorithm.support.HeapSort; G=KXA'R)1.
import org.rut.util.algorithm.support.ImprovedMergeSort; TJ0;xn6o
import org.rut.util.algorithm.support.ImprovedQuickSort; >ZnnGX6$(
import org.rut.util.algorithm.support.InsertSort; N >];xb>
import org.rut.util.algorithm.support.MergeSort; qoC<qn{.a
import org.rut.util.algorithm.support.QuickSort; 8+&Da
import org.rut.util.algorithm.support.SelectionSort; D[K!xq
import org.rut.util.algorithm.support.ShellSort; edfb7prfTl
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/** lnrs4s Km
* @author treeroot =n_>7@9l
* @since 2006-2-2 &^F'ME
* @version 1.0 !<5Wi)*
*/ 4 :M}Vz-
public class SortUtil { Ce@"+k+w
public final static int INSERT = 1; kSjvY&n%
public final static int BUBBLE = 2; B[7Fq[.mh
public final static int SELECTION = 3; @F!oRm5
public final static int SHELL = 4; _Q\<|~
public final static int QUICK = 5; ] N7(<EV/
public final static int IMPROVED_QUICK = 6; eeOG(@@o(
public final static int MERGE = 7; M4L<u,\1s
public final static int IMPROVED_MERGE = 8; yOm#c>X
public final static int HEAP = 9; sbq:8P#
\|R\pS}4
public static void sort(int[] data) { k6|/ik9C
sort(data, IMPROVED_QUICK); 7,R ~2ss5z
} na] 9-~4
private static String[] name={ =O~Y6|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s[u*~A
}; U%aDkC+M
RnUud\T/
private static Sort[] impl=new Sort[]{ hJ*#t<.<P;
new InsertSort(), >d^DN;p
new BubbleSort(), dPF*G$
new SelectionSort(), .2*h!d)E
new ShellSort(), #UqE%g`J
new QuickSort(), 2;ac&j1
new ImprovedQuickSort(), &MJ`rj[%
new MergeSort(), J!5&Nc
new ImprovedMergeSort(), #} `pj}tQ
new HeapSort() n6#z{,W<3
}; Ak,T{;rD
wl%I(Cw{]
public static String toString(int algorithm){ B3&ETi5NTU
return name[algorithm-1]; S+-V16{i
} X;yThb`iI
SM[VHNr,-
public static void sort(int[] data, int algorithm) { lxtt+R
impl[algorithm-1].sort(data); 0 TOw4pC
} &B} ,xcNO
'17V7A/t
public static interface Sort { Qa,$_,E
public void sort(int[] data); jFwJ1W;?-
} vk|xYDD
Gs(;&fw
public static void swap(int[] data, int i, int j) { /*m6-DC
int temp = data; (*V:{_r
data = data[j]; H:,Hr_;nC
data[j] = temp; FLaj|Z~#)
} wRe2sjM
} Ca#T?HL