[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; <m:wuNEM
} "jc)N46
int i1=l; LbbQ3$@WD
int i2=mid+1; `DllW{l
for(int cur=l;cur<=r;cur++){ ~tuFjj^
if(i1==mid+1) _";pk _
data[cur]=temp[i2++]; xy3%z
else if(i2>r) vl~
data[cur]=temp[i1++]; `srZ#F5
else if(temp[i1] data[cur]=temp[i1++]; *>$)#?t
else &p4<@k\L
data[cur]=temp[i2++]; KL"L65g&
} G5f57F
} _1c_TMh}9
V"jnrNs3
} 5g>kr<K
>b?)WNk
改进后的归并排序: *9(1:N;#
jyH_/X5i7
package org.rut.util.algorithm.support; ykhCt\t[
SY)$2RC+}
import org.rut.util.algorithm.SortUtil; @5G7bY7Nz
y]4`d
/** -fgKSJ7
* @author treeroot }z-
* @since 2006-2-2 &*GX:0=/>
* @version 1.0 5w{pX1z1
*/ S)|b%mVwR
public class ImprovedMergeSort implements SortUtil.Sort { =T4w:
u`@FA?+E1
private static final int THRESHOLD = 10; R0<Vd"
iX6jvnJ:/
/* Qb{5*>
* (non-Javadoc) <uwCP4E
* O9)}:++T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I'b]s~u
*/ ea>\.D-S
public void sort(int[] data) { B&N&eRAE
int[] temp=new int[data.length]; T@Z{KV"S
mergeSort(data,temp,0,data.length-1); #de^~
} 0w. _}Cz
rXPx*/C
private void mergeSort(int[] data, int[] temp, int l, int r) { l8Qi^<i/
int i, j, k; NWK_(=n
int mid = (l + r) / 2; ,x.)L=Cx8
if (l == r) g^UWf<xp
return; S]=Vr%irX
if ((mid - l) >= THRESHOLD) NYvj?>[y
mergeSort(data, temp, l, mid); 82!GM.b
else R_n-&d'PP
insertSort(data, l, mid - l + 1); [V0h9!
if ((r - mid) > THRESHOLD) %pQ o%<d
mergeSort(data, temp, mid + 1, r); fEv36xb2S
else :ygz/L
insertSort(data, mid + 1, r - mid); !T. @
vGT.(:\-,
for (i = l; i <= mid; i++) { }*R6p?L5
temp = data; 7"i*J6y*
} a`Zf_;$@
for (j = 1; j <= r - mid; j++) { 9'h^59
temp[r - j + 1] = data[j + mid]; !OgoV22
} o|q#A3%?
int a = temp[l]; S6tH!Z=(g
int b = temp[r]; :K:gyVrC
for (i = l, j = r, k = l; k <= r; k++) { .Kwl8xRg
if (a < b) { %([H*sLX
data[k] = temp[i++]; *=@pdQkR
a = temp; 0|;=mYa4M
} else { K.m[S[cy
data[k] = temp[j--]; U~t(YT
b = temp[j]; ]t;5kj/
} ]bweQw@i
} X-FHJ4
} #?6RoFgMe
? d\8Q't*
/** Ntiz-qW
* @param data x)L@xQ
* @param l g>zL{[e!
* @param i >K%x44|
*/ =T$- #bA)
private void insertSort(int[] data, int start, int len) { J[wXG6M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1_lL?S3,a@
} w,9F riW
} 3vU (4}@
} P$I\)Q H
} Y&:i^k
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堆排序： OhEL9"\<
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package org.rut.util.algorithm.support; hhhO+D1(
'7s!NF2
import org.rut.util.algorithm.SortUtil; Dm#k-y
p#2th`M:P1
/** m@~x*+Iz
* @author treeroot U2$T}/@
* @since 2006-2-2 I r~X#$Upc
* @version 1.0 j83 V$ Le
*/ Q@n kT1o
public class HeapSort implements SortUtil.Sort{ "g-NUl`'
T1=M6iJ
/* (non-Javadoc) <@u6*]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6<Z9p@6
*/ e.V){}{V
public void sort(int[] data) { |e&Kg~~C
MaxHeap h=new MaxHeap(); )K~nZLULY
h.init(data); ]mA?TwD
for(int i=0;i h.remove(); YyIt-fPZ
System.arraycopy(h.queue,1,data,0,data.length); %>TdTt
} `l#g`~L
8t%1x|!
private static class MaxHeap{ )3sb2 #
mN02T@R-
void init(int[] data){ za7wNe(s
this.queue=new int[data.length+1]; _wCSL.
for(int i=0;i queue[++size]=data; e$=|-Jz
fixUp(size); J?'!8,RX
} bAp`lmFI
} \ua.%|
g\'sGt3O
private int size=0; 2|BE{91
F1>,^qyG6
private int[] queue; ^ a:F*<D
kx[8#+P
public int get() { E<dN=#f6
return queue[1]; t ,$)PV
} *Y Ox`z!R
\`C3;}o:"P
public void remove() { Ek3O{<
SortUtil.swap(queue,1,size--); k1J}9HNYR
fixDown(1); / yCV-L2J
} 1zRO==b
file://fixdown ] ?(=rm9u
private void fixDown(int k) { }g?]B+0
int j; X6RM2
while ((j = k << 1) <= size) { . {I7sUQ
if (j < size %26amp;%26amp; queue[j] j++; =%LS9e^7D
if (queue[k]>queue[j]) file://不用交换 7Y/_/t~Y
break; qM+T Wp
SortUtil.swap(queue,j,k); 8@-US ,|
k = j; zVu}7v()
} OK=t)6&b
} ^-ZqS
private void fixUp(int k) { o/R-1\Dn
while (k > 1) { Wm61
int j = k >> 1; s/V[tEC*z
if (queue[j]>queue[k]) T[~X~dqwn"
break; B_> Fd&
SortUtil.swap(queue,j,k); }R^{<{KVJ
k = j; \B)<<[ $
} wr`eBPu
} v|6fqG+Q\
y@I"Hk<T
} pN[i%\vh
+Ji dP
} ''G@n*
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SortUtil： D$\ EZ
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package org.rut.util.algorithm; Go4l#6
5zU$_M
import org.rut.util.algorithm.support.BubbleSort; 9V~yK?
import org.rut.util.algorithm.support.HeapSort; x)*[>d2yd
import org.rut.util.algorithm.support.ImprovedMergeSort; rlD@O~P4
import org.rut.util.algorithm.support.ImprovedQuickSort; Ch3##-
import org.rut.util.algorithm.support.InsertSort; U/>5C:
import org.rut.util.algorithm.support.MergeSort; l}JVRU{
import org.rut.util.algorithm.support.QuickSort; RaAq>B WPr
import org.rut.util.algorithm.support.SelectionSort; pS0T>r
import org.rut.util.algorithm.support.ShellSort; b> |oU
d=[.
/** @ o]F~x
* @author treeroot c c:xT0Y
* @since 2006-2-2 ~1p f ?
* @version 1.0 Z,*VRuA
*/ ; ?!sU
public class SortUtil { OX91b<A
public final static int INSERT = 1; nP.d5%E
public final static int BUBBLE = 2; @:}z\qBM
public final static int SELECTION = 3; piU4%EO
public final static int SHELL = 4; ,M9'S;&^
public final static int QUICK = 5; ]Sh&8 #
public final static int IMPROVED_QUICK = 6; ][3 "xP
public final static int MERGE = 7; ctf'/IZ5
public final static int IMPROVED_MERGE = 8; N'4*L=Ut
public final static int HEAP = 9; SLW1]ZaG
F)C8LH
public static void sort(int[] data) { gN*8zui
sort(data, IMPROVED_QUICK); g& {YHq^+
} {zw#My
private static String[] name={ DGcd|>q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y#\e~>K
}; bbz86]AhY
OnG?@sW+4!
private static Sort[] impl=new Sort[]{ LTxOq|/Cq
new InsertSort(), d97wiE/i<
new BubbleSort(), *fE5Z;!}
new SelectionSort(), [*Lh4K
new ShellSort(), S5j#&i
new QuickSort(), + EM '-
new ImprovedQuickSort(), 7Ev~yY;N
new MergeSort(), jk~<si
new ImprovedMergeSort(), Q9( eH2=
new HeapSort() m#uutomi0
}; BJqM=<nQ
bp }~{]:b
public static String toString(int algorithm){ 17-K~ybc
return name[algorithm-1]; mV-MJ$3r
} ~`y6YIJ3
B|!Re4`0
public static void sort(int[] data, int algorithm) { d6uL;eR
impl[algorithm-1].sort(data); )pg?ZM9
} lm$T`:c
wDn5|F}i&
public static interface Sort { "F=O
public void sort(int[] data); _]B'C
} m$]?Jq
ZW2U9
public static void swap(int[] data, int i, int j) { ur;8uv2o
int temp = data; (u *-(
data = data[j]; $#CkI09
data[j] = temp; VQ+Xh
} %.]qkGZe#
} ~GZ(Ou-&