[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; %CoO-1@C
} )FQxVT,.
int i1=l; z}BuR*WSY{
int i2=mid+1; K<wg-JgA
for(int cur=l;cur<=r;cur++){ &/m0N\n?
if(i1==mid+1) t,NE`LC
data[cur]=temp[i2++]; kz0pX-@b
else if(i2>r) #~}4< 18
data[cur]=temp[i1++]; -%fc)y&$
else if(temp[i1] data[cur]=temp[i1++]; O0l1AX"
else hy&WG&qf
data[cur]=temp[i2++]; C6"{-{H
} d9iVuw0u<
} [n]C
]hMs:$}
} g3|k-
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改进后的归并排序: kxQ al
Xr."C(`w
package org.rut.util.algorithm.support; =W*Ro+wWb
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import org.rut.util.algorithm.SortUtil; w`GjQIA
zK_Q^M`
/** ''^2rF^
* @author treeroot (N6=+dNY
* @since 2006-2-2 |zbM$37?k
* @version 1.0 *j~ObE_y
*/ ?`= <*{_o
public class ImprovedMergeSort implements SortUtil.Sort { 0VnRtLnqI
bV$g]->4e
private static final int THRESHOLD = 10; uK%0,!q
%MCJ%Ph
/* &8;Fi2}(L
* (non-Javadoc) f4O}WU}l{s
* g-pEt#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |F4)&xN\
*/ !_q=r[D\
public void sort(int[] data) { &E]<KbVx
int[] temp=new int[data.length]; r}:Dg fn
mergeSort(data,temp,0,data.length-1); %0p9\I
} B.A;1VE5
/H?) qk
private void mergeSort(int[] data, int[] temp, int l, int r) { 4`Cgz#v {
int i, j, k; zr ~4@JTS
int mid = (l + r) / 2; '/s/o]'sUd
if (l == r) 5d;(D i5z
return; L)i6UAo
if ((mid - l) >= THRESHOLD) B='(0Uxy-
mergeSort(data, temp, l, mid); }S"qU]>8a
else ?7#{#sj
insertSort(data, l, mid - l + 1); .unlr_eA
if ((r - mid) > THRESHOLD) ~#jnkD
mergeSort(data, temp, mid + 1, r); kXWC o6?
else oj=%< a
insertSort(data, mid + 1, r - mid); 2Akh/pb
,Yn$X
for (i = l; i <= mid; i++) { >Qqxn*O
temp = data; !'C8sNs
} n5 <B*
for (j = 1; j <= r - mid; j++) { ]k$:sX
temp[r - j + 1] = data[j + mid]; qgs:9V xF
} $azK M,<q
int a = temp[l]; EK Ac>g
int b = temp[r]; \'r;1W
for (i = l, j = r, k = l; k <= r; k++) { 8%`h:fE
if (a < b) { %J+ w9Z
data[k] = temp[i++]; F0wW3+G
a = temp; -k }LW4
} else { ec,Bu7'8
data[k] = temp[j--]; \=[38?QOY
b = temp[j]; Xyu0np;@
} y: ]
} |.b&\
} nf-6[dg
Y>{%,d#s_
/** E#A}2|7,g
* @param data [s+FX5'K
* @param l :j#zn~7
* @param i 6FX]b4
*/ qYPgn_
private void insertSort(int[] data, int start, int len) { Uw?25+[b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yO/'}FD
} tiy#b8
} r3Kx
} q&&uX-ez5W
} ,g1~4,hqQ
VVEJE$
堆排序： \'X-><1
#<@_mbQ@|K
package org.rut.util.algorithm.support; UhXVeGO
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import org.rut.util.algorithm.SortUtil; #sv:)p
J[UTn'M8]
/** #^_7i)=~
* @author treeroot F ~e}=Nb
* @since 2006-2-2 XM3~]
* @version 1.0 (SCZ.G(>
*/ @.=2*e.z|b
public class HeapSort implements SortUtil.Sort{ VrKLEN\
MH]?:]K9V
/* (non-Javadoc) "HLh3L~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5>:p'zI
*/ Va4AE)[/*
public void sort(int[] data) { -j^G4J
MaxHeap h=new MaxHeap(); _QtW)\)5\
h.init(data); o9v.]tb
for(int i=0;i h.remove(); !-7<x"avm
System.arraycopy(h.queue,1,data,0,data.length); >J,IxRGi
} bv``PSb3
A&d_!u>
private static class MaxHeap{ BA9;=orx
CHdYY7\{
void init(int[] data){ ;p"#ZS7
this.queue=new int[data.length+1]; BOl*. t
for(int i=0;i queue[++size]=data; QvzE:]pyi
fixUp(size); ioslarw1J
} pW&8 =Ew
} vX*kvEG
j[=P3Z0q
private int size=0; "^t;V+Io
R?] S<Z
private int[] queue; ?'$}k
08$l=
public int get() { i;J*9B_U
return queue[1]; V'AZs;
} ]Gl5Qf:+z
R;w1& Z
public void remove() { s="cg0PD
SortUtil.swap(queue,1,size--); j[w5#]&%
fixDown(1); nB |fw"
} n* z;%'0
file://fixdown 602=qb
private void fixDown(int k) { 5?TjuGc
int j; %Gjjl*`E
while ((j = k << 1) <= size) { &RlYw#*1.
if (j < size %26amp;%26amp; queue[j] j++; 7D4I>N'T
if (queue[k]>queue[j]) file://不用交换 U6M&7l8
break; r+nhm"9
SortUtil.swap(queue,j,k); =V^8RlBi
k = j; Ucj>gc=
} ibgF,N
} z.:IUm{z
private void fixUp(int k) { U}W7[f lc
while (k > 1) { C2?p>S/q
int j = k >> 1; h-@_.&P0e
if (queue[j]>queue[k]) a{iG0T.{Yh
break; c+u) C%g
SortUtil.swap(queue,j,k); L_AQS9a^D
k = j; y|%lw%cSe
} 5dLb`Gf
} lW@i,1
zh4m`}p
} t<qXXQ&5
CHM+@lD
} iu'rc/=V
3]/Y=A
SortUtil： `{\10j*B
i'0ol^~y6
package org.rut.util.algorithm; H.TPKdVX
[u8JqX
import org.rut.util.algorithm.support.BubbleSort; V[">SiOg
import org.rut.util.algorithm.support.HeapSort; +C(/.X Kz%
import org.rut.util.algorithm.support.ImprovedMergeSort; oz?6$oE(bt
import org.rut.util.algorithm.support.ImprovedQuickSort; M+\LH
import org.rut.util.algorithm.support.InsertSort; ;Z#DB$o\
import org.rut.util.algorithm.support.MergeSort; cK2Us+h
import org.rut.util.algorithm.support.QuickSort; S]DYEL$
import org.rut.util.algorithm.support.SelectionSort; "cX*GTNi8
import org.rut.util.algorithm.support.ShellSort; V, e
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/** ^ `Y1
* @author treeroot qo0]7m7|
* @since 2006-2-2 q*{Dy1Tj
* @version 1.0 aEqDxr6
*/ -cWxS{vO
public class SortUtil { n]%yf9,w
public final static int INSERT = 1; E9S&UU,K
public final static int BUBBLE = 2; [3hOc/]s
public final static int SELECTION = 3; Z+x`q#ZQr
public final static int SHELL = 4; 4+r26S,T
public final static int QUICK = 5; Psu*t%nQ?A
public final static int IMPROVED_QUICK = 6; 24/ ^_Td
public final static int MERGE = 7; 5I@2UvV8
public final static int IMPROVED_MERGE = 8; }Gm/9@oKc
public final static int HEAP = 9; <7sGA{
!4 G9`>n
public static void sort(int[] data) { [y$sJF7;I
sort(data, IMPROVED_QUICK); TfqQh!Y
} NpYzN|W:
private static String[] name={ [ f`V_1d3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hlTM<E
}; _cH 7lO[
a(`@u&]WZ
private static Sort[] impl=new Sort[]{ mGqT_
new InsertSort(), 421ol
new BubbleSort(), OO+QH 2j
new SelectionSort(), \py \rI
new ShellSort(), fP:g}Z
new QuickSort(), )%&~CW+
new ImprovedQuickSort(), xA2"i2k9
new MergeSort(), ,_2ZKO/k$
new ImprovedMergeSort(), :*/`"M)'
new HeapSort() Ta3qEVs
}; S-k:+4
`>cBR,)r
public static String toString(int algorithm){ weky 5(:
return name[algorithm-1]; "i;c)ZP
} Do5)ilt
*R6Ed
public static void sort(int[] data, int algorithm) { K0O&-v0"1
impl[algorithm-1].sort(data); lZ9rB^!
} P>3 ;M'KsO
/a!M6:,pX
public static interface Sort { &udlt//^%
public void sort(int[] data); * "Z5bKL
} [<M~6]
Q)s[ls
public static void swap(int[] data, int i, int j) { ^p433
int temp = data; Q4,!N(>D
data = data[j]; 3ud_d>
data[j] = temp; Wc+)EX~KS
} h+7THMI
} kKqb: