[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; 8P .! q
} U;(&!Ei
int i1=l; G`pI{_-e
int i2=mid+1; E-x(5^b"
for(int cur=l;cur<=r;cur++){ w3*JVIQC
if(i1==mid+1) QMIXz[9w
data[cur]=temp[i2++]; ?}y7S]B FI
else if(i2>r) /mb| %U]~
data[cur]=temp[i1++]; oDC3AK&
else if(temp[i1] data[cur]=temp[i1++]; #&2mu
else v1} $FmHL"
data[cur]=temp[i2++]; 'g#))y
} D526X0
} M1^pW63
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} 0zd1:*KR,
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改进后的归并排序: |y]#-T?)t
0iYe>u
package org.rut.util.algorithm.support; xZkLN5I{
b;yhgdFx
import org.rut.util.algorithm.SortUtil; |peZ`O^~
3Ry?{m^
/** yCz?V[49
* @author treeroot <Z vG&
* @since 2006-2-2 S4Rv6{r:
* @version 1.0 e0D;]
*/ ]`MRH[{
public class ImprovedMergeSort implements SortUtil.Sort { ?D.]c;PR
(Yx rZ_F'b
private static final int THRESHOLD = 10; k8h$#@^
pd|c7D!6U,
/* X 6>Pq
* (non-Javadoc) '\9A78NV{;
* $rdA0%;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )wKuumet
*/ TPkm~>zD.
public void sort(int[] data) { c!I> _PD`&
int[] temp=new int[data.length]; nI6`/
mergeSort(data,temp,0,data.length-1); ^,?]]=mE
} Tj>~#~
*bZV4}
private void mergeSort(int[] data, int[] temp, int l, int r) { 0s4%22
int i, j, k; BqR8%F
int mid = (l + r) / 2; a/?gp>M9
if (l == r) <uA|nYpp
return; Z!#zr@'k
if ((mid - l) >= THRESHOLD) d/;oNC+
mergeSort(data, temp, l, mid); }ulFW]A^7
else A}$A~g5Ap
insertSort(data, l, mid - l + 1); utQ_!3u
if ((r - mid) > THRESHOLD) s,0,w--=
mergeSort(data, temp, mid + 1, r); e'u9 SpJ
else _$1W:!f4
insertSort(data, mid + 1, r - mid); ><$hFrR!
f~E'0f_
for (i = l; i <= mid; i++) { hG3b7!^#g
temp = data; *s_)E2
} ^oA^z1>3
for (j = 1; j <= r - mid; j++) { Yh4e\]ql~N
temp[r - j + 1] = data[j + mid]; p#3P`I>ZrT
} b-ZvEDCR
int a = temp[l]; /VJ[1o^
int b = temp[r]; \5J/?
for (i = l, j = r, k = l; k <= r; k++) { aG,N>0k8
if (a < b) { NK d8XQ=%
data[k] = temp[i++]; #A?U_32z/2
a = temp; a?@j`@]ZR~
} else { kRG-~'f%`
data[k] = temp[j--]; 4j/8Otn
b = temp[j]; [Q)lJTs
} Byon2|nf7
} T#T!a0
} M,6m*
ca-|G'q
/** yay{lP}b"
* @param data j5tA!o
* @param l 5&6S["lt
* @param i l 4(-yWC$H
*/ #Ey!?Z
private void insertSort(int[] data, int start, int len) { 7j{SCE;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J}lBKP:-*
} Z5\u9E"]
} Zs)HzOP)9
} ^cd+W?
} 4K:p
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堆排序： AOhsat;O`
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package org.rut.util.algorithm.support; Pr/K5aJeg
,D>$N3;
import org.rut.util.algorithm.SortUtil; "w=.2A:q
}7k+tJ<
/** >OmY
* @author treeroot :jgwp~l
* @since 2006-2-2 @ScH"I];uA
* @version 1.0 uQ. m[y
*/ ABB4(_3E
public class HeapSort implements SortUtil.Sort{ :Q"]W!kCs
W8R@Pf
/* (non-Javadoc) _G,`s7Q,w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MHk\y2`/;
*/ 3\G&fb|?}R
public void sort(int[] data) { T/UhZ4(V
MaxHeap h=new MaxHeap(); r( :"BQ
h.init(data); r@^h,
for(int i=0;i h.remove(); 5q}680s9+
System.arraycopy(h.queue,1,data,0,data.length); u:NSPAD)
} yiiYq(\{
%jim] ]<S[
private static class MaxHeap{ D?;$:D"
1\TXb!OtL
void init(int[] data){ D`2Iy.|!
this.queue=new int[data.length+1]; ) j_g*<
for(int i=0;i queue[++size]=data; *dL!)+:d
fixUp(size); H~e;S#3_v
} Y }aa6
} :"|}oKT%mP
ci <`*>l
private int size=0; gyondcF
&ScADmZP^d
private int[] queue; ,GA2K .:#
49E<`f0
public int get() { |Qo;=~7
return queue[1]; ^Bf@I
} VZ5EV'D8!
d:|X|0#\uH
public void remove() { CfNHv-jDL
SortUtil.swap(queue,1,size--); rfpeX
fixDown(1); m(L]R(t
} LkD$\i
file://fixdown OEnJ".&V
private void fixDown(int k) { 7aj|-gZ
int j; M1^,g~e
while ((j = k << 1) <= size) { )4vZIU#
if (j < size %26amp;%26amp; queue[j] j++; FY|.eY_7 {
if (queue[k]>queue[j]) file://不用交换 DBI[OG9
break; DJ2EV^D+P
SortUtil.swap(queue,j,k); mp:%k\cF|
k = j; NjIe2)}'
} W9D]s~bO;
} |W];8
private void fixUp(int k) { C: @T5m
while (k > 1) { N{U``LV
int j = k >> 1; L1 1/XpR
if (queue[j]>queue[k]) {7LO|E}7
break; wuSp+?{5k
SortUtil.swap(queue,j,k); i Tg?JoE2
k = j; BFmd`#{l
} y w)q3zC
} fgVeB;k|
[#S}L(
} NHG+l)y:
vtM!?#
} @-|{qP=Dy
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SortUtil： 6Lk<VpAa
|r[yMI|VR
package org.rut.util.algorithm; 2UU5\ jV6
g!;k$`@{E'
import org.rut.util.algorithm.support.BubbleSort; c%9wI*l
import org.rut.util.algorithm.support.HeapSort; tkx1iBW=
import org.rut.util.algorithm.support.ImprovedMergeSort; >bWx!M]
import org.rut.util.algorithm.support.ImprovedQuickSort; &(UVS0=Dp,
import org.rut.util.algorithm.support.InsertSort; $R4[TQY).!
import org.rut.util.algorithm.support.MergeSort; l=G=J(G
import org.rut.util.algorithm.support.QuickSort; =X6WK7^0
import org.rut.util.algorithm.support.SelectionSort; ?9hw]Q6r}
import org.rut.util.algorithm.support.ShellSort; 1:%HE*r
/R7qR#
/** }<6xZy
* @author treeroot }JyWy_Y
* @since 2006-2-2 m&(yx|a4+
* @version 1.0 `KBgVhS>
*/ l ps 6lnh
public class SortUtil { {Hxvt~P
public final static int INSERT = 1; {-;lcOD
public final static int BUBBLE = 2; 9t:P1
public final static int SELECTION = 3; ICwhqH&
public final static int SHELL = 4; 0O+[z9
public final static int QUICK = 5; HO%atE$>
public final static int IMPROVED_QUICK = 6; pcwkO
public final static int MERGE = 7; mVFz[xI
public final static int IMPROVED_MERGE = 8; $xqI3UaX
public final static int HEAP = 9; <Hw)},_*
%"Tn=fZIF
public static void sort(int[] data) { 'wB6-
sort(data, IMPROVED_QUICK); 7A'd55I4
} rV.04m,
private static String[] name={ JbN@AX:%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~"F83+RDe
}; CMn&1
)2t!= ua
private static Sort[] impl=new Sort[]{ gn"Y?IZ?
new InsertSort(), >Hb>wlYR
new BubbleSort(), n46A
new SelectionSort(), <j"}EEb^
new ShellSort(), *c'nPa$+|S
new QuickSort(), j.UQLi&`
new ImprovedQuickSort(), pMZKF=
new MergeSort(), ^~~&[wY
new ImprovedMergeSort(), Z@ AHe`A
new HeapSort() I`Goc!5t
}; *((wp4b
Itn7Kl
public static String toString(int algorithm){ OL+dx`Y
return name[algorithm-1]; 0IU>KGJ-0s
} :.KN;+tP
U(#)[S,
public static void sort(int[] data, int algorithm) { #>~<rcE(
impl[algorithm-1].sort(data); W'2T7ha Es
} +c&n7
242dT/j
public static interface Sort { h!# (.P
public void sort(int[] data); x;A"S
} gD&/k
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public static void swap(int[] data, int i, int j) { ~&-8lD];LM
int temp = data; fh~"A`d
data = data[j]; R Fgy
data[j] = temp; q;co53.+P)
} ];BGJ5^j
} 01v7_*'R