[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; F/z$jj)
} L<bZVocOb_
int i1=l; Onoi^MDy
int i2=mid+1; NQzpgf|h
for(int cur=l;cur<=r;cur++){ =qH9<,p`H
if(i1==mid+1) |5|^[v
data[cur]=temp[i2++]; L|4kv
else if(i2>r) X6s6fu;
data[cur]=temp[i1++]; a-\\A[E
else if(temp[i1] data[cur]=temp[i1++]; qa 'YZE`
else p?S:J`q
data[cur]=temp[i2++]; e R"XXF0u
} |r*btyOJk
} FT'_{e!M
6v7H?4
} S'~Zlv3`
:Z|lGH =
改进后的归并排序: |&vQ1o|}
| _/D-m*
package org.rut.util.algorithm.support; 1(6B|w5+
tpw0j CVu
import org.rut.util.algorithm.SortUtil; &>kklP
#;GIvfW
/** FtbqZN[
* @author treeroot \,jrug<C$^
* @since 2006-2-2 Qzy[
* @version 1.0 T;D`=p#
*/ $P#Cf&R
public class ImprovedMergeSort implements SortUtil.Sort { g7!P|
1{\{'EP{
private static final int THRESHOLD = 10; c$aTl9e
z^=.05jB
/* (3z: ;
* (non-Javadoc) *xB9~:
* JJJlgr]#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qp8.D4^@3
*/ bZ c&uq_
public void sort(int[] data) { ZAe>MNtW
int[] temp=new int[data.length]; -FA]%Pl<'
mergeSort(data,temp,0,data.length-1); M,1Yce%+}
} ])paU8u
Rz% Px:M
private void mergeSort(int[] data, int[] temp, int l, int r) { }m NP[L
int i, j, k; e;8>/G
int mid = (l + r) / 2; ;EstUs3
if (l == r) 5Gm,lNQAv
return; envu}4wU=e
if ((mid - l) >= THRESHOLD) 4Fhiac
mergeSort(data, temp, l, mid); "-JJ6Bk
else pnin;;D*
insertSort(data, l, mid - l + 1); ^L}fj$
if ((r - mid) > THRESHOLD) O)C y4[
mergeSort(data, temp, mid + 1, r); -.ITcDg
else b%>vhj&F
insertSort(data, mid + 1, r - mid); >Ya+#j~CZ
hU=n>g>nx
for (i = l; i <= mid; i++) { /C"dwh"``
temp = data; ?CGbnXZ4Ug
} 9u<4Q_I`
for (j = 1; j <= r - mid; j++) { =)5eui>{
temp[r - j + 1] = data[j + mid]; XE);oL2xP
} #UGtYD}"
int a = temp[l]; a.)Gd]}g
int b = temp[r]; 5_";EED
for (i = l, j = r, k = l; k <= r; k++) { TA;
if (a < b) { 8mTjf Br
data[k] = temp[i++]; `?VtB!p@x=
a = temp; <(x[Qp/5P
} else { 1c);![O
data[k] = temp[j--]; De`)`\U
b = temp[j]; '9cShe
} \IY)2C<e
} T'.U?G
} 5sui*WH
7m0sF<P{g
/** YGrmco?G
* @param data + 5E6|
* @param l P6w!r>?6N
* @param i wic"a Y<m
*/ ]0P-?O:
private void insertSort(int[] data, int start, int len) { ,^,KWi9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b,kXV<KtU
} Rb=T'x'
} ,[enGw
} [O*5\&6
} \(Z'@5vC
"o&_tB;O
堆排序： xsS/)R?
*njdqr2c~
package org.rut.util.algorithm.support; ,lSt}Lml
4L#q?]$
import org.rut.util.algorithm.SortUtil; "l~wzPY)
nokk!v/
/** v>zeK
* @author treeroot I$sJ8\|gw'
* @since 2006-2-2 !7ct=L
* @version 1.0 +r[u4?
*/ bTB/M=M
public class HeapSort implements SortUtil.Sort{ xC;b<~zN
HN,E+dQ
/* (non-Javadoc) -1t"(v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q#NXJvI
*/ B0I(/ 7
public void sort(int[] data) { 6wH]W+A
MaxHeap h=new MaxHeap(); O o9 ePw7
h.init(data); wN/d J
for(int i=0;i h.remove(); o>x*_4[
System.arraycopy(h.queue,1,data,0,data.length); @czNiWU"4;
} Q?Vq/3K;
+')\,m "z
private static class MaxHeap{ Sz4YPl
{8D`A;KD
void init(int[] data){ I]N?}]uZ
this.queue=new int[data.length+1]; $ ;cZq
for(int i=0;i queue[++size]=data; xVHZZ?e
fixUp(size); u 0KVp6`
} s.z(1MB]
} NT?Gl(
7J$
private int size=0; M\zM-B
("UcjB^62
private int[] queue; 27q9zi!Q
$%!'c# F
public int get() { -'btKz*9
return queue[1]; $p@V1"x
} 6|gC##T
dcUaZfON
public void remove() { W/COrgbW
SortUtil.swap(queue,1,size--); LwIl2u*
fixDown(1); ?)<DEu:Y
} ^(7<L<H
file://fixdown !4zSE,1
private void fixDown(int k) { Dz$GPA
int j; V+My]9ki
while ((j = k << 1) <= size) { urmx})=
if (j < size %26amp;%26amp; queue[j] j++; !v(j#N< m
if (queue[k]>queue[j]) file://不用交换 C5mq@$6
break; SQ7Ws u>T@
SortUtil.swap(queue,j,k); 7i?"akr4
k = j; ximW!y7
} ~bU!4P}4j
} csP 5R3
private void fixUp(int k) { ?m5@ 635
while (k > 1) { 2(V;OWY(@
int j = k >> 1; e1a8>>bcI
if (queue[j]>queue[k]) kGm-jh
break; *'D( j#&
SortUtil.swap(queue,j,k); k2{*WF
k = j; 5tUp[/]pl
} ?pq#|PI)
} ^PDz"L<*
RGd@3OjN
} aOZSX3;wg
{RFpTh7f:
} %5<uQc9
AA[(rw
SortUtil： gZbC[L
W@<(WI3
package org.rut.util.algorithm; \q9wo*A
<u>l#weG,
import org.rut.util.algorithm.support.BubbleSort; i>Wsc?
import org.rut.util.algorithm.support.HeapSort; ,S(^r1R
import org.rut.util.algorithm.support.ImprovedMergeSort; eZpyDw C{
import org.rut.util.algorithm.support.ImprovedQuickSort; OxGKtnAjf
import org.rut.util.algorithm.support.InsertSort; ()K,~
import org.rut.util.algorithm.support.MergeSort; 1#LXy%^tO
import org.rut.util.algorithm.support.QuickSort; ._2#89V
import org.rut.util.algorithm.support.SelectionSort; 1&%6sZN
import org.rut.util.algorithm.support.ShellSort; "b)Y5[nW
vsc)EM ]
/** aH7i$U&
* @author treeroot nn'a`N
* @since 2006-2-2 1b*Me'
* @version 1.0 j>f
*/ [-}LEH1[p
public class SortUtil { ' lt5|
public final static int INSERT = 1; XV)<Oavs
public final static int BUBBLE = 2; jI})\5<R
public final static int SELECTION = 3; <Uj~S
public final static int SHELL = 4; epw*Px
public final static int QUICK = 5; 8nCw1
public final static int IMPROVED_QUICK = 6; ^5j+O.zgN
public final static int MERGE = 7; UQZ<sp4v;
public final static int IMPROVED_MERGE = 8; CJ+/j=i;~c
public final static int HEAP = 9; iZsZSW \
^e*Tg&
public static void sort(int[] data) { L9(mY `d>"
sort(data, IMPROVED_QUICK); cE(P^;7D
} 9i+OYWUO
private static String[] name={ Cq mtO?vne
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'T G43^
}; }G8gk"st
6&jW.G8/
private static Sort[] impl=new Sort[]{ y.h2hv]Bc
new InsertSort(), 7.V'T=@x3)
new BubbleSort(), o< )"\f/,
new SelectionSort(), SrlTwcD
new ShellSort(), &>Zm gz
new QuickSort(), 1<gY
new ImprovedQuickSort(), \<k5c-8Hb
new MergeSort(), gumT"x .^
new ImprovedMergeSort(), QH~;B[->
new HeapSort() +fh@m h0[
}; c3S}(8g5.
Tp vq5Cz
public static String toString(int algorithm){ K&T[F!
return name[algorithm-1]; wm1`<r^M.
} `6bIxb{
awYnlE/Z1
public static void sort(int[] data, int algorithm) { M8_f{|!&
impl[algorithm-1].sort(data); \gz(C`4{j
} 9i9'Rd`g
S*"uXTS
public static interface Sort { uJxT)m!/
public void sort(int[] data); dJYsn+
} "AN*2)e4
o2AfMSt.
public static void swap(int[] data, int i, int j) { kwI[BF
int temp = data; aCxF{>n
data = data[j]; ,"6Bw|s
data[j] = temp; & OO0v*@{
} g=G>4Ua3
} .DX