[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; 'kU5
} w]L^)_'Th
int i1=l; 3{c6)vR2
int i2=mid+1; `%S 35x9
for(int cur=l;cur<=r;cur++){ 'kBg3E$y
if(i1==mid+1) 0C!f/EZK
data[cur]=temp[i2++]; wO<.wPa`
else if(i2>r) N)yCGo
data[cur]=temp[i1++]; oVlh4"y#Lf
else if(temp[i1] data[cur]=temp[i1++]; h pf,44Kg
else PgOOFRwP
data[cur]=temp[i2++]; >u?m Bx
} +/O3L=QyJ
} (U@Ks )
:Kq]b@X
} 9r2l~zE
RvQa&r5l
改进后的归并排序: @vyq?H$U;N
#BtJo:
package org.rut.util.algorithm.support; ri.}G
phCItN;
import org.rut.util.algorithm.SortUtil; aF8'^xF
B|WM;Y^
/** H@,h$$
* @author treeroot ^mwS6WH6
* @since 2006-2-2 pW&K=,7|
* @version 1.0 Q Ev7k
*/ $'*q]]
public class ImprovedMergeSort implements SortUtil.Sort { B^;"<2b*
+/+>:
private static final int THRESHOLD = 10; P;8nC:zL
e|-&h `[
/* I<+EXH%1,
* (non-Javadoc) lKdd3W"o
* h~EGRg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '[WVP=M<XV
*/ !d.bCE~
public void sort(int[] data) { ohU}ST:9
int[] temp=new int[data.length]; '`s+e#rs4{
mergeSort(data,temp,0,data.length-1); jK^Q5iD
} Rf4}((y7Y\
%eOO8^N
private void mergeSort(int[] data, int[] temp, int l, int r) { gOy;6\/
int i, j, k; l+nT$IPF
int mid = (l + r) / 2; wn-1fz<d
if (l == r) *Jwx,wF}4
return; ldFR%v>9
if ((mid - l) >= THRESHOLD) zgNzdO/B
mergeSort(data, temp, l, mid); =;Q:z^S
else 3xIelTf*
insertSort(data, l, mid - l + 1); /7N&4FrG
if ((r - mid) > THRESHOLD) }3O 0nab
mergeSort(data, temp, mid + 1, r); qdnwaJ;&
else &J?:wC=E
insertSort(data, mid + 1, r - mid); /hN;\Z[@
v<3KxP'a
for (i = l; i <= mid; i++) { Y_zMj`HE
temp = data; xovsh\s
} MxgJ+
for (j = 1; j <= r - mid; j++) { zq(4@S-TU
temp[r - j + 1] = data[j + mid]; *^oL$_Y
} Z% DJ{!Hnh
int a = temp[l]; @{>0v"@
int b = temp[r]; pC~M5(F_
for (i = l, j = r, k = l; k <= r; k++) { 5>6:#.f%!e
if (a < b) { 1*GL;W~ix*
data[k] = temp[i++]; fc&djd`FuX
a = temp; F|a'^:Qs
} else { ID: tTltcc
data[k] = temp[j--]; OKPNsN
b = temp[j]; JIiS/]KQ
} p'`?CJq8
} PrHoN2y5E
} \483S]_-z{
N:q\i57x
/** NkV81?
* @param data A?bqDy
* @param l uH&B=w
* @param i t6uYFxE
*/ ds2%i
private void insertSort(int[] data, int start, int len) { >PzZt8e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c)3.AgT
} @<.ei)cqb
} L} "bp
} u69UUkG
} {/j gB"9
R<B5<!+
堆排序： esiU._:u
D0Mxl?S?
package org.rut.util.algorithm.support; &,P; 7R
a&2UDl%K
import org.rut.util.algorithm.SortUtil; [vY#9W"!
h,?%,GI
/** OqWm5(u&S
* @author treeroot YkFAu8b>
* @since 2006-2-2 $1$0M
* @version 1.0 M1]}yTCd
*/ R< L =&I
public class HeapSort implements SortUtil.Sort{ fK6[ p&
"}"/d(
/* (non-Javadoc) qSGM6kb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !1Hs;K
*/ ?fN6_x2e3
public void sort(int[] data) { 's.e"F#
MaxHeap h=new MaxHeap(); NB4Q,iq$
h.init(data); UZdGV?o ?
for(int i=0;i h.remove(); K {kd:pr
System.arraycopy(h.queue,1,data,0,data.length); $q*a}d[Q
} 1eywnOjrj
]>Ym
private static class MaxHeap{ BhYvEbt
$%^](-
void init(int[] data){ Z($i+L%.
this.queue=new int[data.length+1]; {P_i5V?
for(int i=0;i queue[++size]=data; \%&A? D
fixUp(size); 0 *;i]owV
} {cUGksz]}
} oI!"F=?&6
*u-$$@|y
private int size=0; h\p!J-V
E~#G_opQA
private int[] queue; dl"=ZI '^
0hhxTOp
public int get() { Rc:}%a%e
return queue[1]; >|z:CX$]
} HUMy\u84H
5S8>y7knQ
public void remove() { ol41%q*
SortUtil.swap(queue,1,size--); '}9 Nvr)+
fixDown(1); x|yJCs>
} EjFn\|VK
file://fixdown ",&QO7_
private void fixDown(int k) { F b?^+V]9
int j; (3K3)0fy
while ((j = k << 1) <= size) { &l0K~7)b
if (j < size %26amp;%26amp; queue[j] j++; _|4R^*/4
if (queue[k]>queue[j]) file://不用交换 /@|iI<|
break; UWnF2,<s;
SortUtil.swap(queue,j,k); /7])]vZ_
k = j; Ka6u*:/
} I`(53LCqo
} `Th~r&GvF
private void fixUp(int k) { (6B;
while (k > 1) { %.hJDX\j
int j = k >> 1; up+0-!AH
if (queue[j]>queue[k]) dOKp:|9G
break; <{k`K[)
SortUtil.swap(queue,j,k); ZG0^O"B0
k = j; 6}m`_d?
} =^GPQ_"
} z\oTuW*B
=}%#j0a4
} "9r$*\wOf
nShXY6bA
} pbEWnx_
m5iCvOP
SortUtil： I5q$QQK
f]#\&"
package org.rut.util.algorithm; u178vby;l
Ovc9x\N
import org.rut.util.algorithm.support.BubbleSort; JH{/0x#+
import org.rut.util.algorithm.support.HeapSort; "5L?RkFi\
import org.rut.util.algorithm.support.ImprovedMergeSort; >t.Lc.
import org.rut.util.algorithm.support.ImprovedQuickSort; {?`7D:]`^
import org.rut.util.algorithm.support.InsertSort; =y-yHRC7
import org.rut.util.algorithm.support.MergeSort; .SjJG67OyA
import org.rut.util.algorithm.support.QuickSort; F \ls]luN
import org.rut.util.algorithm.support.SelectionSort; ]:#=[CH
import org.rut.util.algorithm.support.ShellSort; J/jkb3
/6Q]f
/** "o+?vx-
* @author treeroot .n1&Jsey
* @since 2006-2-2 r}&&e BY f
* @version 1.0 FJDC^@Ne
*/ J{^md0l
public class SortUtil { :`NZD
public final static int INSERT = 1; iphC\*F
public final static int BUBBLE = 2; [:.wCG5
public final static int SELECTION = 3; |,p"<a!+{w
public final static int SHELL = 4; e2v`
public final static int QUICK = 5; d_d&su E
public final static int IMPROVED_QUICK = 6; ~9 .=t'
public final static int MERGE = 7; 7tXy3-~biz
public final static int IMPROVED_MERGE = 8; 'bJGQ[c
public final static int HEAP = 9; Bkd$'7UT
e)wi}\:q_
public static void sort(int[] data) { _$96y]Bpi
sort(data, IMPROVED_QUICK); ru@#s2
} PkrVQH9^w
private static String[] name={ 9:4S[mz/hD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w.w{L=p:<"
}; x)*Lu">
72d|Jbd
private static Sort[] impl=new Sort[]{ &RYdSXM
new InsertSort(), V\Gs&>
new BubbleSort(), @JXpD8jn
new SelectionSort(), O\.^H/
new ShellSort(), %h@1lsm1+
new QuickSort(), F|eWHw?t
new ImprovedQuickSort(), F<k+>e
new MergeSort(), -$W1wb9z
new ImprovedMergeSort(), jcJ 4?
new HeapSort() U@NCN2I
}; n!4\w>h
yf9"Rc~+
public static String toString(int algorithm){ ^T!Zz"/:
return name[algorithm-1]; ,_u7@Ix
} *sOb I(&
3~T ~Bs
public static void sort(int[] data, int algorithm) { ekvs3a^
impl[algorithm-1].sort(data); B^/MwD>%
} EjLq&QR.
$KYGQP
public static interface Sort { WVRIq'
public void sort(int[] data); >t3_]n1e
} VKl,m ;&N
6 X~><r
public static void swap(int[] data, int i, int j) { ).;{'8Q
int temp = data; i"}z9Ae~.
data = data[j]; n7fhc*}:`
data[j] = temp; !CUl1L1DSi
} 8{jXSCP#
} dhtH&:J<;