[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; qR>"r"Fq
} jxdxIkAHZc
int i1=l; u''~nSR3&
int i2=mid+1; r-]HmY x
for(int cur=l;cur<=r;cur++){ =j$!N# L
if(i1==mid+1) 4Px
data[cur]=temp[i2++]; lMW4SRk1C
else if(i2>r) GJB=5nE
data[cur]=temp[i1++]; 0//B+.#
else if(temp[i1] data[cur]=temp[i1++]; S-D=-{@
else }ki}J>j|f
data[cur]=temp[i2++]; !5escR!\D
} [ta3sEPjs
} d(>
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} &8^ch,+pD
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改进后的归并排序: YnLwBJ2i
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package org.rut.util.algorithm.support; BMlu>,
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import org.rut.util.algorithm.SortUtil; xO nW~Z
(RtjD`e}
/** \'AS@L"Wj^
* @author treeroot ]0yYMnqvr
* @since 2006-2-2 ))z1T8
* @version 1.0 w\PCBY=
*/ &GetRDr
public class ImprovedMergeSort implements SortUtil.Sort { .gS x`|!
{95u^S=
private static final int THRESHOLD = 10; MaX:oGF,
rt5eN:'qY
/* ^3:y<{J
* (non-Javadoc) 3jG #<4;J
* Uq8=R)1<|d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *wOuw@09
*/ *gxo!F}
public void sort(int[] data) { 7:>VH>?D
int[] temp=new int[data.length]; RaNz)]+7`
mergeSort(data,temp,0,data.length-1); y_Tc$g~
} 5_}e?T&s
<m|\#Jw_V
private void mergeSort(int[] data, int[] temp, int l, int r) { !^/Mn
int i, j, k; |8s)kQ4$
int mid = (l + r) / 2; 0/F/U=Z!
if (l == r) },=0]tvZG#
return; cIIt ;q[
if ((mid - l) >= THRESHOLD) lv*fK
mergeSort(data, temp, l, mid); /#,3JU$w
else ps*dO
insertSort(data, l, mid - l + 1); {ta0dS;1
if ((r - mid) > THRESHOLD) g[,1$39Z|@
mergeSort(data, temp, mid + 1, r); =CE(M},d
else K[XFJ9
insertSort(data, mid + 1, r - mid); ~GWn>
<%2A, Vz"
for (i = l; i <= mid; i++) { _E{hB
temp = data; qPc"A!-i
} b(Ev:
for (j = 1; j <= r - mid; j++) { L,XWX8
temp[r - j + 1] = data[j + mid]; H$/r{gfg^
} +gQn,HX
int a = temp[l]; sPee"9%,
int b = temp[r]; "^~>aVuXf
for (i = l, j = r, k = l; k <= r; k++) { {Y%X
if (a < b) { Pkm3&sW
data[k] = temp[i++]; INyakAmJ}-
a = temp; B>11
} else { -cjwa-9 ~
data[k] = temp[j--]; K`9ph"(Z
b = temp[j]; Use`E
} \y-Lt!}
} l1|z; $_z
} 4gTDHQP
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/** bIP'(B#1K
* @param data N|,6<|
* @param l r2EIhaGF;
* @param i %#.HFK
*/ 1!x-_h}
private void insertSort(int[] data, int start, int len) { rsp?N{e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Om%9 x
} '~^3 =[Z
} BVx: JiA
} 7kBULeBn|
} V01-n{~G
%}U-g"I
堆排序： iB Ld*B|#K
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package org.rut.util.algorithm.support; \(lt [=
HR85!S`
import org.rut.util.algorithm.SortUtil; /"t*gN=wrF
^AWM/aY
/** <y(uu(c
* @author treeroot Z#wmEc.}C
* @since 2006-2-2 5Pis0fa
* @version 1.0 qY24Y
*/ XD5z+/F<"0
public class HeapSort implements SortUtil.Sort{ Bv^{|w
Xj;nh?\u
/* (non-Javadoc) $1N_qu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m8Q6ESg<*u
*/ =Tf uwhV
public void sort(int[] data) { Vwp fkD`
MaxHeap h=new MaxHeap(); R{~Yh.)~
h.init(data); 8>TDrpT}
for(int i=0;i h.remove(); X[:&p|g]
System.arraycopy(h.queue,1,data,0,data.length); <_@ S@t)
} Ed3 *fY
b$P=rIB
private static class MaxHeap{ .~0A*a
!<3(+H
void init(int[] data){ L&F0^
this.queue=new int[data.length+1]; 3u7^*$S
for(int i=0;i queue[++size]=data; C+-xC~
fixUp(size); {Slc6$
} Int6xoz
} B*A{@)_
y; Up@.IG
private int size=0; p]uwGWDI
`Td0R!
private int[] queue; 95;q] =U
ajuwP1I
public int get() { S(jbPQT
return queue[1]; Bry\"V"'g
} [k(oQykq
N=&~3k
public void remove() { 89:Ys=
SortUtil.swap(queue,1,size--); r{.DRbn
fixDown(1); -tWkN^j8+
} oJy]n9
file://fixdown 4f<%<Z
private void fixDown(int k) { +]/_gz
int j; T_O\L[]p*
while ((j = k << 1) <= size) { QT/TZ:
if (j < size %26amp;%26amp; queue[j] j++; !']=7It{
if (queue[k]>queue[j]) file://不用交换 zJS,f5L6)
break; O:3pp8
SortUtil.swap(queue,j,k); s8.OL_e
k = j; (Vglcj
} T<06y3sN
} FMB\$(g
private void fixUp(int k) { Fxy-_%a
while (k > 1) { ,JyE7h2%i
int j = k >> 1; 1 ry:Z2
if (queue[j]>queue[k]) C)/uX5
break; t0p^0
SortUtil.swap(queue,j,k); ~sk;6e)(2
k = j; =1fO"|L
} 0f/=C9L
} a02;Zl
g4_DEBh
} I&qT3/SVI
0\O*\w?
} {.OBcx
ZurQr}
SortUtil： }OgzSnR
7(lR$,bE;=
package org.rut.util.algorithm; \2)a.2mAz
Z{7lyEzBg
import org.rut.util.algorithm.support.BubbleSort; fQc2K|V
import org.rut.util.algorithm.support.HeapSort; " &'Jw
import org.rut.util.algorithm.support.ImprovedMergeSort; o&)O&bNJ
import org.rut.util.algorithm.support.ImprovedQuickSort; Es6b~#
import org.rut.util.algorithm.support.InsertSort; r 11:T3
import org.rut.util.algorithm.support.MergeSort; Dp!3uR']p
import org.rut.util.algorithm.support.QuickSort; |3W\^4>,
import org.rut.util.algorithm.support.SelectionSort; fg"@qE-;
import org.rut.util.algorithm.support.ShellSort; ^%wj6
c)gG
/** gsd9QW
* @author treeroot _;",7bT80
* @since 2006-2-2 &-W5T?Sl
* @version 1.0 w~@.&
*/ FCTz>N^p
public class SortUtil { %Uybp
public final static int INSERT = 1; ik02Q,J
public final static int BUBBLE = 2; a(&!{Y1bt
public final static int SELECTION = 3; Z<6xQTx
public final static int SHELL = 4; mz@`*^7?
public final static int QUICK = 5; JCZ"#8M3
public final static int IMPROVED_QUICK = 6; /WXy!W30<
public final static int MERGE = 7; rRyBGEj
public final static int IMPROVED_MERGE = 8; "|w..%Wc
public final static int HEAP = 9; j J6Yz
HubSmbS1
public static void sort(int[] data) { -=,%9r
sort(data, IMPROVED_QUICK); QIQ }ia
} -]"=b\Q
private static String[] name={ |E$Jt-'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YgiwtZ5FY
}; 5\1Z"?
cY?< W/
private static Sort[] impl=new Sort[]{ CL%?K<um
new InsertSort(), J&UFP{)
new BubbleSort(), bA\TuB
new SelectionSort(), ^p(t*%LM
new ShellSort(), )iadu
new QuickSort(), bHE'R!*
new ImprovedQuickSort(), d&'z0]mOe
new MergeSort(), eA9U|&o
new ImprovedMergeSort(), P lJl#-BO
new HeapSort() Q#xeu
}; (.\GI D+i
wJ-G7V,)
public static String toString(int algorithm){ 3nv7Uz
return name[algorithm-1]; iK{q_f\"
} }T%;G /W
1BQTvUAA
public static void sort(int[] data, int algorithm) { rm2"pfs
impl[algorithm-1].sort(data); /!ZeMY:x
} *9)7.}uY
k7P~*ll$
public static interface Sort { l=*^FK]L`
public void sort(int[] data); WL-+;h@VQ
} Zzr+p.
f"Yj'`6
public static void swap(int[] data, int i, int j) { =BJ/ZM
int temp = data; 2pFOC;tl
data = data[j]; ;SkC[;`J
data[j] = temp; U~Aw=h5SD
} , RfU1R
} ; iQ@wOL]