[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; ?'~u)O(n
} ufk2zL8y
int i1=l; = vqJ0!
int i2=mid+1; Lan|(!aW
for(int cur=l;cur<=r;cur++){ t)j$lmQn
if(i1==mid+1) P-B5-Nz
data[cur]=temp[i2++]; R|*0_!O:[
else if(i2>r) CtMqE+j^
data[cur]=temp[i1++]; :oy2mi;
else if(temp[i1] data[cur]=temp[i1++]; {xg=Ym)
else We$ n
data[cur]=temp[i2++]; :PBFFLe
} ,G0"T~
} wKi#5k2
^S`hKv&87
} 2n3&uvf'TL
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改进后的归并排序: bz>\n"'
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package org.rut.util.algorithm.support; C5^WJx[
q>(?Z#sB
import org.rut.util.algorithm.SortUtil; lt-3OcC
Y\WQ0'y
/** 1Z ~C3)T=
* @author treeroot ?jz\[0)s
* @since 2006-2-2 \bT0\ (Js\
* @version 1.0 }*bp4<|
*/ <eEIR
public class ImprovedMergeSort implements SortUtil.Sort { MUbKlX
zlP{1z;nV
private static final int THRESHOLD = 10; _LZ(HTX~
gd * b0(
/* E+i(p+=4
* (non-Javadoc) 8SRUqe[H]
* fNi&r0/-t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,ASNa^7/>
*/ 4v>SXch
public void sort(int[] data) { gw"SKp!]
int[] temp=new int[data.length]; w-JWMgY8w
mergeSort(data,temp,0,data.length-1); [5'HlHK
} Ba?1q%eG
pNd`fV#jX
private void mergeSort(int[] data, int[] temp, int l, int r) { ^[SW07o~
int i, j, k; aPlEM_escS
int mid = (l + r) / 2; uxn+.fA
if (l == r) iPl,KjGk
return; <xSh13<
if ((mid - l) >= THRESHOLD) *~GI-h
mergeSort(data, temp, l, mid); =c\(]xX
else f|(9+~K/7&
insertSort(data, l, mid - l + 1); Il4]1d|
if ((r - mid) > THRESHOLD) MOh&1]2j5
mergeSort(data, temp, mid + 1, r); Pqx?0f)
else jY\z+lW6A
insertSort(data, mid + 1, r - mid); >{{ds--
t0fgG/f'
for (i = l; i <= mid; i++) { 41=H&G&
temp = data; %r.OV_04
} &I=o1F2B)
for (j = 1; j <= r - mid; j++) { i/*)1;xsk
temp[r - j + 1] = data[j + mid]; dH5*%
} hN K wQ
int a = temp[l]; EGI$=Y
int b = temp[r]; _R(ZvsOZ
for (i = l, j = r, k = l; k <= r; k++) { .lj5pmD
if (a < b) { :vIJ>6lIR
data[k] = temp[i++]; <w}^Z}fpk&
a = temp; .!<yTh
} else { p4IyKry,
data[k] = temp[j--]; @{RhO|UR
b = temp[j]; 3|w$gG;Y
} Z[VrRT,\c
} 0xDn!
} I}u\ov_Su
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/** |WS@q'
* @param data l8(9?!C
* @param l #Tzs9Bkaca
* @param i ~Y f8,m
*/ l"[.Q>d
private void insertSort(int[] data, int start, int len) { E4o{Z+C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4Ia'Yr
} g$C]ln>"9m
} +dLUq2
} &Y@),S9
} SVwxK/Fci
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堆排序： zmZU"eWp)
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package org.rut.util.algorithm.support; qF^P\cD
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import org.rut.util.algorithm.SortUtil; h #gI1(uL
+C;;4s)
/** [4C_iaE
* @author treeroot 2k=|p@V n~
* @since 2006-2-2 Has}oe[
* @version 1.0 ^L.I9a#]
*/ 2HVqJib4Yn
public class HeapSort implements SortUtil.Sort{ 03)irq%l;
rD$5]%Y
/* (non-Javadoc) kuBtPZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2{WZ?H93a
*/ vv)w@A:Vn)
public void sort(int[] data) { y|BHSc3
MaxHeap h=new MaxHeap(); uPcx6X3]
h.init(data); p q?# X0
for(int i=0;i h.remove(); yqK_|7I+
System.arraycopy(h.queue,1,data,0,data.length); $X:,Q,?
} indbg d
@I1*b>X~<
private static class MaxHeap{ b(mZ/2,B
< ~CY?
void init(int[] data){ 4J`-&05O
this.queue=new int[data.length+1]; K)x6F15r
for(int i=0;i queue[++size]=data; nm\f$K>Pg
fixUp(size); q("l?'
} 7>@0nHec
} h*KDZ+{)
A #SO}c
private int size=0; c)Ef]E\
9wc\~5{li
private int[] queue; =>>Dnp
f#AuZ]h
public int get() { :T PG~`k(
return queue[1]; SF:{PgGMi
} w<!&%
SkipPEhA
public void remove() { COWlsca
SortUtil.swap(queue,1,size--); $l.8
fixDown(1); ;W+1 H !
} :#sBNy
file://fixdown %#4;'\'5
private void fixDown(int k) { ;j;U9-oh
int j; WSeiW
while ((j = k << 1) <= size) { 0)PZS>
if (j < size %26amp;%26amp; queue[j] j++; aVVE2:M
if (queue[k]>queue[j]) file://不用交换 gjK: a@{
break; [`h,Ti!m<
SortUtil.swap(queue,j,k); _{^F8
k = j; -KbO[b\V
} 8Dxg6>
} ( Ygy%O%
private void fixUp(int k) { *3RD\.jPX
while (k > 1) { liB~vdqj
int j = k >> 1; ^cW{%R>XY
if (queue[j]>queue[k]) =$~x]
break; xzMpTZQ
SortUtil.swap(queue,j,k); 2.j0pg .
k = j; ;CL^2{
} p8F$vx4,
} V^.Z&7+E`_
2&s(:=
} T|oDJ]\J
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} 26zif
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SortUtil： M>RLS/r>d
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package org.rut.util.algorithm; eon(C|S7eK
Z^A(Q>{e
import org.rut.util.algorithm.support.BubbleSort; }EfRYE$E
import org.rut.util.algorithm.support.HeapSort; ou|3%&*"
import org.rut.util.algorithm.support.ImprovedMergeSort; b[n6L5P5m2
import org.rut.util.algorithm.support.ImprovedQuickSort; @ohJ'
import org.rut.util.algorithm.support.InsertSort; '@hnqcqXq
import org.rut.util.algorithm.support.MergeSort; A-\n"}4
import org.rut.util.algorithm.support.QuickSort; w+%p4VkA<r
import org.rut.util.algorithm.support.SelectionSort; Y\1& Uk
import org.rut.util.algorithm.support.ShellSort; r 3T#Nv
M tDJ1I%
/** J{EK}'
* @author treeroot iu+H+_
* @since 2006-2-2 ONcS,oHW
* @version 1.0 -Vg0J6x
*/ UU =,Brb
public class SortUtil { pek5P4W_
public final static int INSERT = 1; kc2E4i
public final static int BUBBLE = 2; {;UBW7{
public final static int SELECTION = 3; OH+2)X
public final static int SHELL = 4; TSL/zTLDJ
public final static int QUICK = 5; mp]UUpt
public final static int IMPROVED_QUICK = 6; #eI`l`}
public final static int MERGE = 7; +(q r{G?
public final static int IMPROVED_MERGE = 8; ,qgR+]?({
public final static int HEAP = 9; Tc;BE
eLN(NSPoS
public static void sort(int[] data) { xdsF! Zb
sort(data, IMPROVED_QUICK); q=BAYZ\`
} P/9|mYmsq
private static String[] name={ kA4kQ}q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '_=XfTF
}; !Nhq)i
b{e|~v6&
private static Sort[] impl=new Sort[]{ |TBKsx8
new InsertSort(), !.{{QwZ
new BubbleSort(), i6h0_q8 >
new SelectionSort(), CBx5:}t
new ShellSort(), |-AR)Smt
new QuickSort(), c*>SZ'T\
new ImprovedQuickSort(), N;,N6&veK/
new MergeSort(), 6^p>f:5
new ImprovedMergeSort(), v".u#G'u
new HeapSort() n-lDE}K9%B
}; $J:~jY/J
w\.z-6G
public static String toString(int algorithm){ fAR0GOI
return name[algorithm-1]; TlBu3z'P
} z1~U#
Q#$dp
public static void sort(int[] data, int algorithm) { T^ah'WmNw
impl[algorithm-1].sort(data); 5HbPS%^.
} Vuo 8[h>
{[B`q
public static interface Sort { iuq%Q\0@w
public void sort(int[] data); b{JxTT}03
} Sh5SOYLz
laFF/g;sRC
public static void swap(int[] data, int i, int j) { h|=&a0
int temp = data; J 9k~cz
data = data[j]; ! XNTk]!
data[j] = temp; ^Ul*Nm
} y {1p#
} nxYp9,c"