[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; X-Yy1"6m1
} THFzC/~Q
int i1=l; QJsud{ada
int i2=mid+1; |uT&M`7\{
for(int cur=l;cur<=r;cur++){ g[#4`Q<.
if(i1==mid+1) Zx1I&K\Cd
data[cur]=temp[i2++]; (_9cL,v
else if(i2>r) nVO|*Bnf)
data[cur]=temp[i1++]; @CxXkR
else if(temp[i1] data[cur]=temp[i1++]; 2tEA8F~k
else v0d<P2ix
data[cur]=temp[i2++]; AUan^Om
} -F]0Py8(
} bG'"l qn
5bfd8C
} |t1ij'N
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改进后的归并排序: w b@Zna
Sh]g]xR
package org.rut.util.algorithm.support; |X'Pa9u
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import org.rut.util.algorithm.SortUtil; ^2|G0d@.:
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/** ranlbxp2l
* @author treeroot k=7+JI"J
* @since 2006-2-2 "1-|ahW
* @version 1.0 h=1cD\^|qw
*/ NIzxSGk|
public class ImprovedMergeSort implements SortUtil.Sort { 3RW3<n
HxH.=M8S_
private static final int THRESHOLD = 10; -UhSy>m
AXQG
/* %+1;iuDL
* (non-Javadoc) _w'N&#
* b6LwKUl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jOE~?{8m
*/ `X=2Ff
public void sort(int[] data) { _LOV&83O(
int[] temp=new int[data.length]; bR0z$~
mergeSort(data,temp,0,data.length-1); R3[H#*gF<
} -t5DcEAb$
#Q6.r.3@x
private void mergeSort(int[] data, int[] temp, int l, int r) { a9w1Z4
int i, j, k; nVK`H@5fw
int mid = (l + r) / 2; t!u{sr{j=
if (l == r) nJ ZQRRa:C
return; #U=}Pv~wM
if ((mid - l) >= THRESHOLD) =$^<@-;
mergeSort(data, temp, l, mid); LHS^[}x^1
else 6{qI
insertSort(data, l, mid - l + 1); xpzQ"'be
if ((r - mid) > THRESHOLD) Hy_}e"
mergeSort(data, temp, mid + 1, r); WN_i-A1G/h
else J4xJGO
insertSort(data, mid + 1, r - mid); uqN:I)>[P
s-z*Lq*
for (i = l; i <= mid; i++) { QIcg4\d%s
temp = data; 9T#JlV
} EE^ N01<"\
for (j = 1; j <= r - mid; j++) { 1l~(J:DT
temp[r - j + 1] = data[j + mid]; YXBU9T{r
} (Vvs:h%H
int a = temp[l]; Ep@NT+VnI
int b = temp[r]; tR;? o,T
for (i = l, j = r, k = l; k <= r; k++) { s*XwU
if (a < b) { b')Lj]%;k
data[k] = temp[i++]; =,UuQJ,l
a = temp; l5}b.B^w
} else { Rzolue 8
data[k] = temp[j--]; 9qqzCMrI0e
b = temp[j]; Y?^1=9?6
} '%D$|)
} /{j")
} @`hnp:
@ZD/y%e
/** T9c=As_EM
* @param data n1Y3b~E?E
* @param l *>ilT5q
* @param i w^.^XK4v.
*/ dV5aIj
private void insertSort(int[] data, int start, int len) { S!u`V3-s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KyqFeR
} +&T;jad2
} X~H~k1
} 77:s=)
} TC2gl[
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堆排序： [CfA\-gx<f
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package org.rut.util.algorithm.support; T.=du$
8olR#>
import org.rut.util.algorithm.SortUtil; }iK_7g`yKa
pxF<L\L?:
/** E8:4Z$|c
* @author treeroot }-e
* @since 2006-2-2 VHyP@JB
* @version 1.0 xyoh B#'W
*/ Gob;dku
public class HeapSort implements SortUtil.Sort{ Hko(@z
{U`B|
/* (non-Javadoc) .Fz5K&E=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f +#
*/ &|:T+LVv$+
public void sort(int[] data) { " -Ie
MaxHeap h=new MaxHeap(); (f5v{S6b(
h.init(data); e|L$e0
for(int i=0;i h.remove(); X@ljZ
System.arraycopy(h.queue,1,data,0,data.length); CQq'x+{F
} Tz=YSQy$9
}x[d]fcC
private static class MaxHeap{ Dm3/i|Y
3,snx4q (
void init(int[] data){ pY3N7&m\:
this.queue=new int[data.length+1]; Ozygr?*X
for(int i=0;i queue[++size]=data; ~okIiC]#
fixUp(size); bi fi02
} S+i .@N.^
} pvz*(u
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private int size=0; -V'`;zE6
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private int[] queue; No\H QQ
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public int get() { "4{_amgm&<
return queue[1]; A~vZ}?*M
} LE15y>
,|: a7b]
public void remove() { &M)S~Hb^
SortUtil.swap(queue,1,size--); "CEy r0h
fixDown(1); bw@DcT&,
} b}G4eXkuj
file://fixdown 5-277?
private void fixDown(int k) { seFug
int j; 5(/ 5$u
while ((j = k << 1) <= size) { ;%1ob f 89
if (j < size %26amp;%26amp; queue[j] j++; Oc;/'d2
if (queue[k]>queue[j]) file://不用交换 ?kICYtY:_b
break; pai>6p
SortUtil.swap(queue,j,k); ."m6zq
k = j; u}QB-oU
} Dm@wTt8N(
} XUD/\MoV
private void fixUp(int k) { Y$^x.^dT,
while (k > 1) { kT(}>=]g
int j = k >> 1; Nk-biD/J
if (queue[j]>queue[k]) mx#H+:}&r
break; ]Q\Ogfjp
SortUtil.swap(queue,j,k); D_6GzgZ
k = j; :x*8*@kC
} Co2* -[R
} Yx_[vLm
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} )OqN\
4#5w^
} n9;+RhxA
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SortUtil： ^n@.
p}KZ#"Q
package org.rut.util.algorithm; eSynw$F2N
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import org.rut.util.algorithm.support.BubbleSort; &bx;GG\<4
import org.rut.util.algorithm.support.HeapSort; JM{S49Lx
import org.rut.util.algorithm.support.ImprovedMergeSort; *G^n<p$"
import org.rut.util.algorithm.support.ImprovedQuickSort; #@,39!;,:O
import org.rut.util.algorithm.support.InsertSort; 8Ek<J+&|I
import org.rut.util.algorithm.support.MergeSort; #e.2m5T
import org.rut.util.algorithm.support.QuickSort; Na^1dn
import org.rut.util.algorithm.support.SelectionSort; o~ .[sn5l-
import org.rut.util.algorithm.support.ShellSort; W{Cc wq
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/** k]<
* @author treeroot V1KWi^
* @since 2006-2-2 NF1e>O:a<
* @version 1.0 =2#a@D6Bl
*/ i0uBb%GMT
public class SortUtil { u93=>S
public final static int INSERT = 1; TB] %?L:
public final static int BUBBLE = 2; 0fvQPs!O
public final static int SELECTION = 3; 4#uWj?u
public final static int SHELL = 4; PsDks3cG
public final static int QUICK = 5; ?)#dP8n
public final static int IMPROVED_QUICK = 6; (Rvke!"B
public final static int MERGE = 7; Wh%qvV6]
public final static int IMPROVED_MERGE = 8; SGW2'
public final static int HEAP = 9; {&G7 Xa
w,NK]<dU@
public static void sort(int[] data) { /"?y @;Y~
sort(data, IMPROVED_QUICK); omM*h{z$$
} buo_H@@p{s
private static String[] name={ rt%.IQdY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *b?C%a9
}; uROt h_/
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private static Sort[] impl=new Sort[]{ >9W ;u`
new InsertSort(), . m_y5J
new BubbleSort(), L0SeG:
new SelectionSort(), &I.UEF2,
new ShellSort(), mt7}1s,i[
new QuickSort(), /%Bc*k=ox
new ImprovedQuickSort(), sk!v!^\_r
new MergeSort(), Wy%q9x]}
new ImprovedMergeSort(), )t{oyBT
new HeapSort() chsjY]b
}; 2Z6#3~
lIO.LF3
public static String toString(int algorithm){ CGIcuHp
return name[algorithm-1]; $]4^ENkI
} ll{jE
e#K =SV!H
public static void sort(int[] data, int algorithm) { H,qIHQW#
impl[algorithm-1].sort(data); _`WbR&d2Id
} * B,D#;6
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public static interface Sort { 9|dgmEd
public void sort(int[] data); PYqx&om
} 4VPL -":6
@`aR*B
public static void swap(int[] data, int i, int j) { cu|gM[
int temp = data; B:5(sK
data = data[j]; w!)B\l^+c
data[j] = temp; 6\)61o_1|
} zF%CFqQ
} x^}kG[s