[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 QI.0L"
} dK:l&R
int i1=l; | \AbL!u
int i2=mid+1; enPzy:C
for(int cur=l;cur<=r;cur++){ Coga-: 2vu
if(i1==mid+1) yonJd
data[cur]=temp[i2++]; aw%>YrJ
else if(i2>r) "CIpo/ebL
data[cur]=temp[i1++]; `DI{wqV9
else if(temp[i1] data[cur]=temp[i1++]; u86J.K1Q
else g ^D)x[
data[cur]=temp[i2++]; ;~}-AI-
} :X3rd|;kc
} \%w7D6dEZ
^ze@#Cp
} j'G"ZPw1
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改进后的归并排序: !JT<(I2
gUksO!7^1
package org.rut.util.algorithm.support; Rg%R/p)C
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import org.rut.util.algorithm.SortUtil; Hi9 G^Q
o%vIkXw
/** mJwv&E
* @author treeroot #B}BI8o (
* @since 2006-2-2 e7Yb=/F
* @version 1.0 vN{vJlpY
*/ ]+}:VaeA
public class ImprovedMergeSort implements SortUtil.Sort { VFe-#"0ZO
R=2 gtW"r
private static final int THRESHOLD = 10; #]?,gwvTf
o%kSR ]V|
/* gg lNpzj
* (non-Javadoc) &>d:ewM\
* $=\oJ-(!@S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @qg0u#k5
*/ OU0xZ=G
public void sort(int[] data) { ,\|n=T,
int[] temp=new int[data.length]; ]3gYuz|
mergeSort(data,temp,0,data.length-1); ~@b9
} wo,""=l
;n yB
private void mergeSort(int[] data, int[] temp, int l, int r) { R*JOiVAC
int i, j, k; S#dyRTmI
int mid = (l + r) / 2; rnzsfr-|(2
if (l == r) ,gAr|x7_
return; jK ?
if ((mid - l) >= THRESHOLD) !mw{T D
mergeSort(data, temp, l, mid); +~R.7NE%
else wZ (uq?3S`
insertSort(data, l, mid - l + 1); H;7O\
if ((r - mid) > THRESHOLD) :vn0|7W4
mergeSort(data, temp, mid + 1, r); UQC'(>.}
else dg!1wD
insertSort(data, mid + 1, r - mid); ')C_An>X6
K1m!S9d`x
for (i = l; i <= mid; i++) { ]pM5?^<~
temp = data; "k>{b:R|
} b?+Yo>yF8
for (j = 1; j <= r - mid; j++) { ]1/W8z%
temp[r - j + 1] = data[j + mid]; ?RrC~7~
} 5n|MA
int a = temp[l]; :Olj
int b = temp[r]; hq|jC
for (i = l, j = r, k = l; k <= r; k++) { j8D$/
if (a < b) { u;l6sdo
data[k] = temp[i++]; Apw-7*/
a = temp; 18[?dV
} else { Nlf&]^4(0
data[k] = temp[j--]; ql%]$`IV6
b = temp[j]; h=p-0 Mx .
} ^)eessZ
} N7j]yvE
} FM@W>+
;-<<1Jz/2
/** 1xFhhncf
* @param data p ] $
* @param l N#2nH1C
* @param i PBPJ/puW
*/ #b]}cwd!
private void insertSort(int[] data, int start, int len) { ;6\Ski0=l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e>)}_b
} >mGGJvTx
} `Tm8TZd66
} @BB,i /
} CwCo"%E8}
Bv |jo&0n
堆排序： K|Ij71
6):sO/es
package org.rut.util.algorithm.support; 3'gd'`Hn/
g-TX;(
import org.rut.util.algorithm.SortUtil; ];wohW%
FZ}C;yUPD
/** YA8yMh*4D?
* @author treeroot V)@nRJg
* @since 2006-2-2 Wb}0-U{S'
* @version 1.0 'nmYB:&!
*/ *}Ae9
public class HeapSort implements SortUtil.Sort{ +Fy-~Mq
]i_):@
/* (non-Javadoc) $48[!QE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i,U-H\p&
*/ ^/5E773
public void sort(int[] data) { ^*owD;]4_
MaxHeap h=new MaxHeap(); JzS^9)&
h.init(data); EC\rh](d 1
for(int i=0;i h.remove(); v#AO\zYKd
System.arraycopy(h.queue,1,data,0,data.length); `P)64So-1
} < 8W:ij.`
A%sxMA!K,
private static class MaxHeap{ U:5*i
:ayO+fr#
void init(int[] data){ H 29 _ /
this.queue=new int[data.length+1]; !gA^$(=:"
for(int i=0;i queue[++size]=data; jAQ)3ON<
fixUp(size); ^PCL^]W
} @v:ILby4-
} >f9]Nj
enfu%"(K)
private int size=0; N?u2,h-
6I6ZVSxb
private int[] queue; zDQ\PZ~
#ui%=ja[:~
public int get() { `\/Wah}I
return queue[1]; HN&vk/[
} X|QX1dl
w|U@jr*H]
public void remove() { TJGKQyG$L
SortUtil.swap(queue,1,size--); tX2>a
fixDown(1); CB7R{~ $
} ^ 8Nr%NJ
file://fixdown eB1eUK>
private void fixDown(int k) { HpgN$$\@
int j; !C)>
while ((j = k << 1) <= size) { =<tJAoVV
if (j < size %26amp;%26amp; queue[j] j++; -:1Gr8
if (queue[k]>queue[j]) file://不用交换 w]}cB+C+l#
break; JeSkNs|vB
SortUtil.swap(queue,j,k); u[% J#S
k = j; ?[|4QzR
} MrygEC 5
} p44uozbK
private void fixUp(int k) { c=c.p i"s
while (k > 1) { OKNs (H
int j = k >> 1; oz5lt4
if (queue[j]>queue[k]) !*QA;*e
break; ;U:o'9^9T
SortUtil.swap(queue,j,k); zYl+BM-j,6
k = j; +Y%I0.?&5
} ^`C*";8Q
} &wWGZ~T
I>(z)"1
} xN~<<PIZ
b|pNc'u:Cn
} dIh(~KqB
#JT%]!
SortUtil： UqQZ A0e
(h(ZL9!
package org.rut.util.algorithm; q|Tk+JH{5
TbUkqABm
import org.rut.util.algorithm.support.BubbleSort; S>zKD
import org.rut.util.algorithm.support.HeapSort; jC }u>AB
import org.rut.util.algorithm.support.ImprovedMergeSort; B 0fo[Ev
import org.rut.util.algorithm.support.ImprovedQuickSort; ^ZZ@!Udy
import org.rut.util.algorithm.support.InsertSort; C3`.-/{D"
import org.rut.util.algorithm.support.MergeSort; K`mxb}
import org.rut.util.algorithm.support.QuickSort; !"qEB2r
import org.rut.util.algorithm.support.SelectionSort; gM/_:+bT>P
import org.rut.util.algorithm.support.ShellSort; BqJrL/(
zqEZ+|c=
/** !c;p4B)
* @author treeroot {>qrf:
* @since 2006-2-2 K^p"Z$$
* @version 1.0 !ilDR<
*/ \$++.%0
public class SortUtil { _rWXcK3cjr
public final static int INSERT = 1; o0v m?CL#
public final static int BUBBLE = 2; _3?xIT
public final static int SELECTION = 3; :zTj"P>"I
public final static int SHELL = 4; HH7gT
public final static int QUICK = 5; cyn]>1ZM
public final static int IMPROVED_QUICK = 6; JSP8Lu"n
public final static int MERGE = 7; >L3p qK
public final static int IMPROVED_MERGE = 8; ,wy:RVv@e
public final static int HEAP = 9; uqH! eN5
pc(9(. |
public static void sort(int[] data) { FP cvkXQD
sort(data, IMPROVED_QUICK); hYQ%|CBXBR
} ).6/ii9gt
private static String[] name={ l@2`f#y1~<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lJpv
}; 7VD7di=D
+.Ukzu~s
private static Sort[] impl=new Sort[]{ P>cJ~FM
new InsertSort(), Lgw@y!Llij
new BubbleSort(), kxiyF$ 9
new SelectionSort(), (W6\%H2u
new ShellSort(), H0:6zSsc=|
new QuickSort(), Kd21:|!t^
new ImprovedQuickSort(), A.*nDl`H
new MergeSort(), Hqy>!1!
new ImprovedMergeSort(), V'#u_`x"D)
new HeapSort() }C1}T}U
}; K*D]\/;^
Y2~{qY
public static String toString(int algorithm){ 'r3}=z4Y
return name[algorithm-1]; =|^W]2W$
} B3=/iOb#
c8 fb)`,k
public static void sort(int[] data, int algorithm) { w'j]Y%
impl[algorithm-1].sort(data); !,WRXE&j
} n_gB#L$
gI$`d?[0{
public static interface Sort { z?g4^0e
public void sort(int[] data); ^E,UcK;
} aj~@r3E;
{?_)m/\
public static void swap(int[] data, int i, int j) { S`-IQ,*}
int temp = data; 0To 5|r
data = data[j]; u+I3VK_)
data[j] = temp; c_=zd6 b$S
} rW .0_*
} 6:X\vw