[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; UwVc!Lys
} W~2T/~M
int i1=l; CyV(+KBe_
int i2=mid+1; 7)
for(int cur=l;cur<=r;cur++){ -/gAb<=
if(i1==mid+1) 6*%E4#4
data[cur]=temp[i2++]; vz}_^8O
else if(i2>r) P"ATqQG%D
data[cur]=temp[i1++]; l_0/g^(
else if(temp[i1] data[cur]=temp[i1++]; _p,1m[&M
else Oj0,Urs7
data[cur]=temp[i2++]; m1,yf*U
} T;Zv^:]0
} )&wJ_(z
*?s"~XVs
} 0)nY- f0
xI,7ld~
改进后的归并排序: t+%tN^87:
5MmSQ_
package org.rut.util.algorithm.support; dBM> ;S;v
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import org.rut.util.algorithm.SortUtil; i[rXs/]
Lk:Sju
/** v&}^8j
* @author treeroot ,<,#zG[.
* @since 2006-2-2 Yb=Z`)
* @version 1.0 .jvRUD8A7
*/ m5\/7 VC
public class ImprovedMergeSort implements SortUtil.Sort { :+$/B N:iO
EViQB.3w\
private static final int THRESHOLD = 10; >cRE$d?
GK8x<Aq%z
/* >do3*koA
* (non-Javadoc) ZDt|g^
* o}VW%G"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ct\n1T }
*/ O.^1r
public void sort(int[] data) { NI33lp$V
int[] temp=new int[data.length]; VVVw\|JB>
mergeSort(data,temp,0,data.length-1); PDtLJt$
} {j4J(dtO
ebmU~6v k
private void mergeSort(int[] data, int[] temp, int l, int r) { E!}~j
int i, j, k; o%V%@q H
int mid = (l + r) / 2; {*Tnl-m~
if (l == r) C|H/x\?zRv
return; *7:HO{P>Y
if ((mid - l) >= THRESHOLD) j/*4Wj[
mergeSort(data, temp, l, mid); Q=T/hb
else CZ.XEMN\
insertSort(data, l, mid - l + 1); &I=F4 z
if ((r - mid) > THRESHOLD) m* JbZT
mergeSort(data, temp, mid + 1, r); 'Nn>W5#))
else YDoVm?
insertSort(data, mid + 1, r - mid); U?sio%`(
JtGBNz!"
for (i = l; i <= mid; i++) { 6O# xV:Uc<
temp = data; qGH\3g-
} )7TuV"
for (j = 1; j <= r - mid; j++) { \o2cztl=
temp[r - j + 1] = data[j + mid]; :bBMy\(u
} SXx;-Ws
int a = temp[l]; 3Z-N*bhC
int b = temp[r]; $S_G:}tna
for (i = l, j = r, k = l; k <= r; k++) { "Z70 jkW[
if (a < b) { c>pbRUMH
data[k] = temp[i++]; W^Z#_{
a = temp; @A;Ouu(
} else { Hb|y`Ok
data[k] = temp[j--]; t,>j{SK~
b = temp[j]; 'awZ-$#
} |JRaskd
} /By`FW Y
} dp'xd>m
R7j'XU
/** }!n90 9L
* @param data /\C5`>x
* @param l ?> 7SZiC`
* @param i oNK-^N?-T
*/ B`1"4[{
private void insertSort(int[] data, int start, int len) { `-QY<STTP9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y4Fuh nb>
} [yf&]0
} g?=|kp
} %}x$YDO
} =V(|3?N
v#WD$9QWs
堆排序： PShluhY
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package org.rut.util.algorithm.support; NwB;9ZhZ
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import org.rut.util.algorithm.SortUtil; syR +;
#:st>V_h
/** Y,;$RV@g
* @author treeroot #k*P/I~
* @since 2006-2-2 xY,W[?3CY
* @version 1.0 x;L.j7lzA;
*/ R;2q=%
public class HeapSort implements SortUtil.Sort{ /ig'p53jL
1j":j%9M
/* (non-Javadoc) oGa8#>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w +~,Mv\
*/ |r%lJmBB
public void sort(int[] data) { =n73bm
MaxHeap h=new MaxHeap(); @CUYl*.PD
h.init(data); m+a\NXWR?N
for(int i=0;i h.remove(); ceUhCb
System.arraycopy(h.queue,1,data,0,data.length); qk *b,`;
} l2*o@&.
'O+)[D
private static class MaxHeap{ DTMoZm
F*['1eAmdY
void init(int[] data){ 11g_!X -g@
this.queue=new int[data.length+1]; ~ubcD6f
for(int i=0;i queue[++size]=data; DmA~Vj!a^y
fixUp(size); N+9W2n
} ?s-Z3{k
} 5{Oq* |
wR%F>[6.{
private int size=0; DCheG7lo{
wxc24y
private int[] queue; ;]PP+h
v(`9+*
public int get() { 1Uaj}=@M
return queue[1]; 5@-[[ $dk
} >3qfo2K0
csd~)a nb
public void remove() { GD-cP5$
SortUtil.swap(queue,1,size--); Zn{Y+ce7d
fixDown(1); {u(( y D
} @r*w 84
file://fixdown 8-u #<D.
private void fixDown(int k) { @km@\w
int j; Klj -dz
while ((j = k << 1) <= size) { uf/4vz,
if (j < size %26amp;%26amp; queue[j] j++; 2CY4nSKW
if (queue[k]>queue[j]) file://不用交换 &~K4I
break; M?ObK#l!_
SortUtil.swap(queue,j,k); ]5',`~jkF
k = j; 8fSY@
} =MjkD)l
} v1VH&~e
private void fixUp(int k) { %nV6#pr
while (k > 1) { 1$#1
int j = k >> 1; AeR*79x
if (queue[j]>queue[k]) O\+b1+&b3Y
break; 53<.Knw5a
SortUtil.swap(queue,j,k); p&$O}AX|
k = j; /_[?i"GW
} w\zNn4B})A
} *w OU=1+
hCPyCq]
} R KXhD PA
)_a;xB`S(
} `Iqh\oY8-
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SortUtil： ^:u-wr8?{
:LxsiDrF[
package org.rut.util.algorithm; EpCF/i?9:
P\ia ?9
import org.rut.util.algorithm.support.BubbleSort; j_{f(.5
import org.rut.util.algorithm.support.HeapSort; qHl>d*IZ
import org.rut.util.algorithm.support.ImprovedMergeSort; r]=Z :
import org.rut.util.algorithm.support.ImprovedQuickSort; =oT4!OUf
import org.rut.util.algorithm.support.InsertSort; &hcD/*_Z
import org.rut.util.algorithm.support.MergeSort; ;Qi0j<dXd
import org.rut.util.algorithm.support.QuickSort; < UD90}
import org.rut.util.algorithm.support.SelectionSort; re)7h$f}
import org.rut.util.algorithm.support.ShellSort; E"zC6iYZ;
k!"6mo@rd
/** \#!B*:u
* @author treeroot U62Z ?nge%
* @since 2006-2-2 {HtW`r1)Tt
* @version 1.0 4Ifz-t/
*/ .x'?&7#(
public class SortUtil { h7kn >q;
public final static int INSERT = 1; Vj[hT~{f
public final static int BUBBLE = 2; 'mTQ=1
public final static int SELECTION = 3; _-|+k
public final static int SHELL = 4; vyvb-oz;u
public final static int QUICK = 5; p5aqlYb6r
public final static int IMPROVED_QUICK = 6; GDQQ4-|O
public final static int MERGE = 7; )W/_2Q.
public final static int IMPROVED_MERGE = 8; Gzc`5n{"
public final static int HEAP = 9; (_3QZ
UB,0c)
public static void sort(int[] data) { gE9x+g
sort(data, IMPROVED_QUICK); m(w9s;<
} vcC"
private static String[] name={ 69S*\'L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0[f[6mm%m
}; 5c0$oyl)M
5VSc5*[
private static Sort[] impl=new Sort[]{ rpUTn!*u/
new InsertSort(), .aQ8I1~
new BubbleSort(), .#}A/V.-Y
new SelectionSort(), CI1K:K AM
new ShellSort(), _`lPLBr6
new QuickSort(), TF?~vS%@P
new ImprovedQuickSort(), ~NTKWRaR
new MergeSort(), zm mkmTp
new ImprovedMergeSort(), }ag;yf;
new HeapSort() fRjp(m
}; AO,^v+$
vty:@?3\
public static String toString(int algorithm){ .cz7jD
return name[algorithm-1]; wUfm)Q#
} B9wQ;[gQB
@D$ogU,#
public static void sort(int[] data, int algorithm) { ?_d3|]N
impl[algorithm-1].sort(data); hd W7Qck"
} AquO#A[,#
tB`IBuy9!"
public static interface Sort { i_:#][nWX
public void sort(int[] data); K7t_Q8
} aF[#(PF
Sqx'nXgO
public static void swap(int[] data, int i, int j) { Te`MIR
int temp = data; NNMn,J
data = data[j]; #~4;yY\$I
data[j] = temp; Myf2"\}
} a4mRu|x
} q ,+29