[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; 6ch@Be5*
} W=q?tD~V
int i1=l; #d3[uF]OmW
int i2=mid+1; )kFme=;
for(int cur=l;cur<=r;cur++){ }ZxW"5oq
if(i1==mid+1) \?aOExG I
data[cur]=temp[i2++]; g8C+1G8
else if(i2>r) 7$;c6_se
data[cur]=temp[i1++]; ;]|m((15G
else if(temp[i1] data[cur]=temp[i1++]; u!sSgx=
else /M5=tW#e
data[cur]=temp[i2++]; rjfc.l#v
} lv*Wnn@k
} T]5U_AI@
avF&F
} BF@m)w.v
#1gTpb+t
改进后的归并排序: |j\eBCnH3
=f/avGX
package org.rut.util.algorithm.support; 1Al=v
jJiCF,m
import org.rut.util.algorithm.SortUtil; vbW\~xf
:==UDVP
/** fo/(()
* @author treeroot cuJ/ Vc
* @since 2006-2-2 Ut0qrkqF
* @version 1.0 r%OrH-T
*/ VKl~oFKXJ
public class ImprovedMergeSort implements SortUtil.Sort { oXu~9'm$
XyN`BDFi
private static final int THRESHOLD = 10; {FrHm
mE)x7
/* %a%+!wX0x
* (non-Javadoc) kW*W4{Fth
* pZNlcB[Qn-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C{lB/F/|!
*/ x`&P}4v0
public void sort(int[] data) { 6'3Ey'drH
int[] temp=new int[data.length]; CJ37:w{%*Y
mergeSort(data,temp,0,data.length-1); B$iMU?B3
} zwF7DnW<<
+LvZ87O^~
private void mergeSort(int[] data, int[] temp, int l, int r) { ^^W`Lh%9
int i, j, k; ;1Tpzm
int mid = (l + r) / 2; lBYS>4~
if (l == r) <ZN) /,4PS
return; O;.d4pO(tC
if ((mid - l) >= THRESHOLD) EV;;N
mergeSort(data, temp, l, mid); [m@e^6F0U
else iyHp$~,q?t
insertSort(data, l, mid - l + 1); la6e`
if ((r - mid) > THRESHOLD) WoN]eO
mergeSort(data, temp, mid + 1, r); l-JKcsM
else crF9,p
insertSort(data, mid + 1, r - mid); s`dkEaS
cc#_acR
for (i = l; i <= mid; i++) { *HfW(C$
temp = data; xfZ9&g
} \p_8YC
for (j = 1; j <= r - mid; j++) { ~=aI2(b
temp[r - j + 1] = data[j + mid]; QyBK*uNdV
} $(!D/bvJ
int a = temp[l]; wHDFTIDI
int b = temp[r]; UBpM8/U
for (i = l, j = r, k = l; k <= r; k++) { iKCTYXN1(
if (a < b) { }tg:DG
data[k] = temp[i++]; YQw/[
a = temp; E,nYtn|B
} else { CMD`b
data[k] = temp[j--]; 1Rb<(%
b = temp[j]; F'T= Alf
} N*c?Er@8U
} {mq$W
} A+Pm "|
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/** .>\>F{#~
* @param data =FC;d[U
* @param l /R+]}Lt~%*
* @param i uR[PKLh
*/ -^NAHE$bW
private void insertSort(int[] data, int start, int len) { `qy6qKl N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _S7M5{U_
} 9jJ/ RXp
} t+Q|l&|0
} w[n>4?"{
} =Z$=-\<x0.
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堆排序： z]R!l%`
Z[A|SyZp
package org.rut.util.algorithm.support; 'V*M_o(\
Jb-QP'$@
import org.rut.util.algorithm.SortUtil; >ehWjL`8
lr= !:D=K
/** M`,Z#)Af
* @author treeroot oKqFZ,m[
* @since 2006-2-2 8 H"f9S=K
* @version 1.0 4m~stDlN
*/ pkMON}"mj
public class HeapSort implements SortUtil.Sort{ nfPl#]ef*
$5p'+bE
/* (non-Javadoc) GeW$lA I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JV*,!5
*/ E)Epr&9S
public void sort(int[] data) { R)d7b,_Yd
MaxHeap h=new MaxHeap(); QcVtv7+*v
h.init(data); 7Mbt*[n
for(int i=0;i h.remove(); ("@V{<7(t
System.arraycopy(h.queue,1,data,0,data.length); OU964vv
} sV4tu(~
g(F*Y>hk
private static class MaxHeap{ f0'Wq^^
H\>I&gC'
void init(int[] data){ 2dlV'U_g
this.queue=new int[data.length+1]; GZ>% &^E
for(int i=0;i queue[++size]=data; \EfwS% P
fixUp(size); YD>>YaH_3@
} ?01""Om
} mZJzBYM)
$}c@S0%P"
private int size=0; X!+ a;wr
P!&CH4+
private int[] queue; CoN/L`.SN
uTt:/gm
public int get() { Rm1`D
return queue[1]; 2g8P$+;
} r4>I?lD
wLp t2b8S
public void remove() { '{*>hj5.8
SortUtil.swap(queue,1,size--); 9<r}s
fixDown(1); N~KRwsDH
} ; SM^
file://fixdown hd BC ^n
private void fixDown(int k) { aw~EK0yU
int j; bHT@]`@@
while ((j = k << 1) <= size) { xa*gQ%+F
if (j < size %26amp;%26amp; queue[j] j++; 6OW-Dif^AG
if (queue[k]>queue[j]) file://不用交换 T@WMT,J6j
break; QYb?;Z
SortUtil.swap(queue,j,k); #C7j|9Ew1]
k = j; +B|X k[
} !27]1%Aw
} diLl>z
private void fixUp(int k) { ~J{{n_G{
while (k > 1) { ?a9k5@s
int j = k >> 1; ABDUp:
if (queue[j]>queue[k]) )t=u(:u]
break; JU.%;e7
SortUtil.swap(queue,j,k); Czxrn2p/
k = j; sYP@>tHC
} Xkm2C)
} vp9<.*h
W+S; Do
} 6+z]MT
itgO#(g$Q
} \8aF(Y^H
Y/(-mcR
SortUtil： X($SBUS6
AAY UXY!
package org.rut.util.algorithm; ]*U')
{3Wc<&D C1
import org.rut.util.algorithm.support.BubbleSort; #L$ I%L"
import org.rut.util.algorithm.support.HeapSort; A\.*+k/B
import org.rut.util.algorithm.support.ImprovedMergeSort; T$;XJx
import org.rut.util.algorithm.support.ImprovedQuickSort; ='>UKy[=
import org.rut.util.algorithm.support.InsertSort; ,O!aRvzap
import org.rut.util.algorithm.support.MergeSort; fMaNv6(
import org.rut.util.algorithm.support.QuickSort; mhuaXbr
import org.rut.util.algorithm.support.SelectionSort; ~mU_`o
import org.rut.util.algorithm.support.ShellSort; elB 8
Z?mg1;Q
/** ~]M"
* @author treeroot ;)a9Y?
* @since 2006-2-2 "6QMa,)D
* @version 1.0 1z:N$O_v
*/ H\bIO!vb
public class SortUtil { D|:sSld @
public final static int INSERT = 1; 8m<<tv.
public final static int BUBBLE = 2; r ngw6?`n-
public final static int SELECTION = 3; 1D6O=j\
public final static int SHELL = 4; ,+9r/}K]/
public final static int QUICK = 5; RY<b]|
public final static int IMPROVED_QUICK = 6; D.`\ ^a
public final static int MERGE = 7; e8bJ]
public final static int IMPROVED_MERGE = 8; 3>Snd9Q
public final static int HEAP = 9; >6+K"J-@
-5.%{Go$[
public static void sort(int[] data) { =rF8[Q0K
sort(data, IMPROVED_QUICK); $(=1A>40
} k;7.qhe:
private static String[] name={ ~\,6C1M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T%/w^27E
}; -+_&#twU
Z+(V \
private static Sort[] impl=new Sort[]{ )7J>:9h
new InsertSort(), ppKCY4
new BubbleSort(), >,Z{wxzJ
new SelectionSort(), d2sq]Q
new ShellSort(), E2D8s=r
new QuickSort(), It-*CD9
new ImprovedQuickSort(), ?%Fk0E#>2
new MergeSort(), A!yLwkc:5
new ImprovedMergeSort(), z?[DW*
new HeapSort() =)8fE*[s
}; {m:Rv&T
a0\UL"z#+
public static String toString(int algorithm){ B$EP'5@b
return name[algorithm-1]; g<%-n,
} a*ymBGF
"~ stZ.
public static void sort(int[] data, int algorithm) { U{(07GNm#
impl[algorithm-1].sort(data); F9r*ZyNlx
} P^W47 SO
tb3fz")UC
public static interface Sort { yG$@!*|
public void sort(int[] data); ;(6lN<iU
} %;$Y|RbmqE
%QLYNuG
public static void swap(int[] data, int i, int j) { }* JMc+!9@
int temp = data; ?GU!ke p
data = data[j]; "\?G
data[j] = temp; );H[lKy
} [HDO^6U
} vyGLn