[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; 9z,sn#-t
} O4rjGTRF
int i1=l; &4Z8df!
int i2=mid+1; >d 5-if
for(int cur=l;cur<=r;cur++){ {`HbpM<=m]
if(i1==mid+1) -rDfDdT
data[cur]=temp[i2++]; g=:o'W$@
else if(i2>r) #2=l\y-#
data[cur]=temp[i1++]; ~WrpJjI[
else if(temp[i1] data[cur]=temp[i1++]; pte\1q[N
else q<}IO
data[cur]=temp[i2++]; h#1:ypA6l
} [^"}jbn/
} =?]`Xo,v~
,Yag! i>;
} RDps{),E;d
k>i88^kPV
改进后的归并排序: S|tD8A
Z%~}*F}7X
package org.rut.util.algorithm.support; ^B"LT>.[
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import org.rut.util.algorithm.SortUtil; (Mv~0ShakO
6(rm%c
/** 8\J$\Edv
* @author treeroot l;-2hZ
* @since 2006-2-2 Tzd#!Lvm:,
* @version 1.0 ~-"CU:$o
*/ h;=~%2Y
public class ImprovedMergeSort implements SortUtil.Sort { F:zmO5L5
?e%*q^~Cu
private static final int THRESHOLD = 10; )U/Kz1U
L7ae6#5.
/* b+Q{Z*
* (non-Javadoc) +2[0q% i
* 9KK^1<46c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RHsVG &<j
*/ D#nHg
public void sort(int[] data) { <Zva
int[] temp=new int[data.length]; 6 ;'s9s"
mergeSort(data,temp,0,data.length-1); 8UB2 du@?
} 'IU3Xu[-.
4KH'S'eR
private void mergeSort(int[] data, int[] temp, int l, int r) { (-<hx~
int i, j, k; '`8 ^P
int mid = (l + r) / 2; o0Teect=
if (l == r) ru:"c^W:[
return; G[}v?RLI
if ((mid - l) >= THRESHOLD) mJ%^`mrI
mergeSort(data, temp, l, mid); <*vR_?!
else F`KXG$
insertSort(data, l, mid - l + 1); >p&"X 2 @
if ((r - mid) > THRESHOLD) &5}YTKe}|
mergeSort(data, temp, mid + 1, r); ]ty$/{hx'
else j32*9
insertSort(data, mid + 1, r - mid); taDe^Istj
8{Wl
for (i = l; i <= mid; i++) { +B{u,xgg
temp = data; hUpour |b
} E}Cz(5
for (j = 1; j <= r - mid; j++) { [kJ;Uxncz~
temp[r - j + 1] = data[j + mid]; p$"~vA .
} !S~)U{SSK
int a = temp[l]; D)MFii1J~
int b = temp[r]; (jKqwVs.:
for (i = l, j = r, k = l; k <= r; k++) { F=5+JjrX
if (a < b) { )]n>.ZmLCB
data[k] = temp[i++]; g Cp`J(2v:
a = temp; kNP-+o
} else { Vc0j)3
data[k] = temp[j--]; Z71_D
b = temp[j]; {~&]
} IlF_g`
} X$<pt,}%
} U_jW5mgsG
Mn5(Kw?o2J
/** @l3&vt2=J
* @param data :TVo2Zm[@
* @param l FOD'&Yb&
* @param i e"1mdw"
*/ ^/%o I;O{
private void insertSort(int[] data, int start, int len) { wsdZwik
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sudh=_+>
} #@nPB.
} !"FEp
} H/t0#
} \[!{tbK`2
>07i"a
堆排序： i`YZ;L L
G%Lt>5*!nE
package org.rut.util.algorithm.support; XN-1`5:4I
<e&v[
import org.rut.util.algorithm.SortUtil; M19O^P>[
0aq{Y7sYU
/** Dhm;K$T
* @author treeroot 4~Q<LEly
* @since 2006-2-2 p7+>]sqX
* @version 1.0 !pfpT\i]N:
*/ C!_=L?QT^
public class HeapSort implements SortUtil.Sort{ eG+$~\%Fub
`?T::&`
/* (non-Javadoc) YS4"TOFw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q?hf2iw
*/ %#fjtbeB
public void sort(int[] data) { J_a2DM6d
MaxHeap h=new MaxHeap(); 51%Rk,/o
h.init(data); *s, bz.[
for(int i=0;i h.remove(); ;7[DFlS\P
System.arraycopy(h.queue,1,data,0,data.length); .`*;AT
} `C7pM
wBlE!Pm
private static class MaxHeap{ t.&JPTK-H
<=!t!_
void init(int[] data){ o^5UHFxTCB
this.queue=new int[data.length+1]; g[y&GCKY!=
for(int i=0;i queue[++size]=data; Ce//;Op
fixUp(size); @@a#DjE%/
} Bd*Ok]
} ^69(V LK
TN Z-0
private int size=0; -~sW@u)O
f*V^HfiQb
private int[] queue; p%Q{Rqc)
e`B!)Sr
public int get() { x`2dN/wDhf
return queue[1]; 5T"h7^}e
} -5os0G80
zn'Mi:O'p
public void remove() { '?90e4x3/
SortUtil.swap(queue,1,size--); y)fz\wk
fixDown(1); F" G+/c/L
} FYNUap,A
file://fixdown { zL4dJw
private void fixDown(int k) { .$f0!` t
int j; 8\)4waz$
while ((j = k << 1) <= size) { \{(cz/]G/
if (j < size %26amp;%26amp; queue[j] j++; ^tyqc8&
if (queue[k]>queue[j]) file://不用交换 H[R6 ?H@$F
break; dtQ3iuV %
SortUtil.swap(queue,j,k); /2r&ga&
k = j; fyZtwl@6w#
} dXWG`G_
} e2xKo1?I
private void fixUp(int k) { F)l1%FCm
while (k > 1) { ,LOx!
int j = k >> 1; -R$Q`Xw
if (queue[j]>queue[k]) Us6~7L00
break; lh\`9F:
SortUtil.swap(queue,j,k); uI)z4Z
k = j; +CQIm!Sp
} g5nL7;`N
} >0:=<RW
|+-b#Sa9
} Nog{w
JBV 06T_4o
} #VZ-gy4$\B
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SortUtil： ;M+~e~
{6}$XLV3l
package org.rut.util.algorithm; (-o}'l'mo
zYis~+
import org.rut.util.algorithm.support.BubbleSort; D.F1^9Q
import org.rut.util.algorithm.support.HeapSort; 3ug>,1:6-
import org.rut.util.algorithm.support.ImprovedMergeSort; 2_6@&2
import org.rut.util.algorithm.support.ImprovedQuickSort; sldcI@Z
import org.rut.util.algorithm.support.InsertSort; f'j<v
import org.rut.util.algorithm.support.MergeSort; ASS<XNP
import org.rut.util.algorithm.support.QuickSort; 80U(q/H%9
import org.rut.util.algorithm.support.SelectionSort; )Zvn{
import org.rut.util.algorithm.support.ShellSort; *P12d
rv~OfL
/** I'J-)D`
* @author treeroot T[ zEAj
* @since 2006-2-2 \ 6Y%z
* @version 1.0 6m9\0)R
*/ DI :
public class SortUtil { `'rvDaP
public final static int INSERT = 1; xM&`>`;^e
public final static int BUBBLE = 2; +D h?MQt?
public final static int SELECTION = 3; =4/K#cQ
public final static int SHELL = 4; %u?A>$Jn
public final static int QUICK = 5; P?=}}DI
public final static int IMPROVED_QUICK = 6; w!UIz[ajI
public final static int MERGE = 7; 0b=00./o
public final static int IMPROVED_MERGE = 8; 9WL$3z'*
public final static int HEAP = 9; s_!F`[
Tn'o$J
public static void sort(int[] data) { o~x49%X<c
sort(data, IMPROVED_QUICK); q) e*eN
} ) Cm95,Y
private static String[] name={ {ZUgyGE{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7%|HtBXv^
}; X-yS9E
fHF*#
private static Sort[] impl=new Sort[]{ U@".XIDQ
new InsertSort(), W 6R/{H
new BubbleSort(), VkC1\L6
new SelectionSort(), gue~aqtJ
new ShellSort(), ()_^:WQO?
new QuickSort(), xn<x/e
new ImprovedQuickSort(), w\>@>*E>
new MergeSort(), T#YJ5Xw
new ImprovedMergeSort(), F@xKL;'N74
new HeapSort() ?KFj=Yo
}; |v"&Y
U uSCqI};
public static String toString(int algorithm){ |Mnc0Fgvy,
return name[algorithm-1]; 8$ _8Yva"e
} _.GHtu/I
+qa^K%K
public static void sort(int[] data, int algorithm) { DbN_(mC
impl[algorithm-1].sort(data); VpxsgCS
} c*V/2" 5
Q/l388'
public static interface Sort { 0fw>/"v
public void sort(int[] data); /6'5uP
} )4FW~o<i
l=>FoJf!*<
public static void swap(int[] data, int i, int j) { Pu2cU5n
int temp = data; P7qzZ
data = data[j]; XTq+ 9
data[j] = temp; Yx"~_xA/u
} J'yiVneMw
} 4='/]z