[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; U8eU[|-8O/
} LbnF8tj}h
int i1=l; fK{Z{)D
int i2=mid+1; ^AT#A<{1(
for(int cur=l;cur<=r;cur++){ nIl<2H]F`
if(i1==mid+1) m@yx6[E#
data[cur]=temp[i2++]; {sUc2vR
else if(i2>r) 7 .xejz
data[cur]=temp[i1++]; ,%KMi-w]q,
else if(temp[i1] data[cur]=temp[i1++]; YVO~0bX:
else N8Un42
data[cur]=temp[i2++]; `nL^]i
} }b>e lz
} V_9>Z?
RohD.`D
} Q[bIkvr|
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改进后的归并排序: 84gj%tw'-
Ws[d.El
package org.rut.util.algorithm.support; _m1WY7
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import org.rut.util.algorithm.SortUtil; PU%WpI.w
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/** ;{rl Y>
* @author treeroot &_Z8:5e
* @since 2006-2-2 =@k3*#\
* @version 1.0 w*AXD!}
*/ e{,[\7nF
public class ImprovedMergeSort implements SortUtil.Sort { BBsZPJ5
LESF*rh=
private static final int THRESHOLD = 10; L\^H#:?t
@"`{Sh`Y$
/* hF-X8$[
* (non-Javadoc) Y0nuwX*{
* SFa^$w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jqy?Od)
*/ N-GQ\&
public void sort(int[] data) { RH<C:!F^
int[] temp=new int[data.length]; nb|"dK|
mergeSort(data,temp,0,data.length-1); hN_,Vyf
} D 3}e{J8
G$ Ii
private void mergeSort(int[] data, int[] temp, int l, int r) { U=UnE"h
int i, j, k; Xu\22/Co
int mid = (l + r) / 2; LWP&Si*j
if (l == r) q8vRUlf
return; [>f4&yY
if ((mid - l) >= THRESHOLD) @0rwvyE=+3
mergeSort(data, temp, l, mid); 3WF6bJN
else _xXDvBU
insertSort(data, l, mid - l + 1); jz$83TB-
if ((r - mid) > THRESHOLD) bq`0$c%hN
mergeSort(data, temp, mid + 1, r); h>K%OxR
else %LZf=`:(
insertSort(data, mid + 1, r - mid); d:=:l?
2BIOA#@t
for (i = l; i <= mid; i++) { veGRwir
temp = data; ]ipltR7k
} GGn/J&k
for (j = 1; j <= r - mid; j++) { :#p!&Fi
temp[r - j + 1] = data[j + mid]; tL@m5M%:N2
} N @sVA%L.
int a = temp[l]; -%)8=
int b = temp[r]; rDWqJ<8
for (i = l, j = r, k = l; k <= r; k++) { W= \gPCo
if (a < b) { y'pX/5R0
data[k] = temp[i++]; #oD*H:%*
a = temp; ^k}jPc6
} else { #&c}in"!
data[k] = temp[j--]; }!g^}BWWp
b = temp[j]; `F1 ( v
} RJZ4fl
} %O3 r>o=
} D*#r V P
'5"`H>[
/** %j?<v@y
* @param data a=3{UEi'o
* @param l +']S
* @param i !U!}*clYL
*/ *S4*FH;8
private void insertSort(int[] data, int start, int len) { {pNf&'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9}6^5f?|
} =2[U4<d!R
} ssC5YtF7X
} tmI2BBv
} goV[C]|
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堆排序： APR%ZpG
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package org.rut.util.algorithm.support; I~>L4~g)
5zH?1Z~*
import org.rut.util.algorithm.SortUtil; O~AOZ^a:2
hkL[hD
/** 8TnByKZz
* @author treeroot ~V4&l3o
* @since 2006-2-2 y(RK|r
* @version 1.0 0Ie9T1D=
*/ .v:K`y;f\(
public class HeapSort implements SortUtil.Sort{ ]%5DuE\M8\
W=EvEx^?%
/* (non-Javadoc) AyMMr_q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hol54)7$3:
*/ Ng3MfbFG
public void sort(int[] data) { UN}jpu<h
MaxHeap h=new MaxHeap(); xdH*[
h.init(data); ]OOL4=b
for(int i=0;i h.remove(); )d6Ya1vJH
System.arraycopy(h.queue,1,data,0,data.length); PDcZno?
} 6 4da~SEn
Y@Kp'+t(!
private static class MaxHeap{ m,U`hPJ
@"#W\m8
void init(int[] data){ 6"W~%FSJX
this.queue=new int[data.length+1]; 43Yav+G(+
for(int i=0;i queue[++size]=data; }$ Am;%?p
fixUp(size); ]S~Z8T-[
} Dyj5a($9"{
} \5_7!.
&@xixbg
private int size=0; U/oncC5
4yH=dl4=44
private int[] queue; ~a5p_xP
[EJ[Gg0m
public int get() { Kj_hCSvf3e
return queue[1]; _azg 0.)
} l*]*.?m/5
e/m,PE
public void remove() { h+x"?^
SortUtil.swap(queue,1,size--); x.+}-(`W#~
fixDown(1); #is:6Z,OEU
} 8uX1('+T*
file://fixdown Rt<8&.m4
private void fixDown(int k) { t "J"G@1)
int j; zZ|Si
while ((j = k << 1) <= size) { 1;[\xqJ
if (j < size %26amp;%26amp; queue[j] j++; o~F @1
if (queue[k]>queue[j]) file://不用交换 q@p-)+D;
break; !\H!9FR
SortUtil.swap(queue,j,k); _e=R[
k = j; tw]RH(g+#
} cRX0i;zag
} |.Bb Pfe8f
private void fixUp(int k) { >'@yq
while (k > 1) { 3I?? K)Yl
int j = k >> 1; _1`*&k JL~
if (queue[j]>queue[k]) Z2WAVSw
break; _{o=I?+]
SortUtil.swap(queue,j,k); rs3Uk.Z^'
k = j; M? oK@i
} EW{z?/
} +xwz.:::
p IXBJk
} 5yO6szg
j3rBEQ,R
} o)7gKWjujP
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SortUtil： (KHTgZ6
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package org.rut.util.algorithm; `av8|;
8ltHR]v
import org.rut.util.algorithm.support.BubbleSort; AyKaazm]9
import org.rut.util.algorithm.support.HeapSort; #{GUu',?&
import org.rut.util.algorithm.support.ImprovedMergeSort; n< [np;\
import org.rut.util.algorithm.support.ImprovedQuickSort; uRQm.8b
import org.rut.util.algorithm.support.InsertSort; U%ce0z
import org.rut.util.algorithm.support.MergeSort; 5DfAL;o!
import org.rut.util.algorithm.support.QuickSort; <$n%h/2%
import org.rut.util.algorithm.support.SelectionSort; WJZW5 Xt
import org.rut.util.algorithm.support.ShellSort; mk1;22o{TX
H>e?FDs0*R
/** F9ry?g=h
* @author treeroot x{C=rdp__
* @since 2006-2-2 ?MuM _6
* @version 1.0 qu8i Jq
*/ REhXW_x
public class SortUtil { 2"NRnCx*
public final static int INSERT = 1; SHPaSq'&N
public final static int BUBBLE = 2; E)>~0jv
public final static int SELECTION = 3; +}X?+Epm
public final static int SHELL = 4; }.7!@!q.
public final static int QUICK = 5; -Xkdu?6Eh
public final static int IMPROVED_QUICK = 6; 28-6(oG
public final static int MERGE = 7; *~fZ9EkD
public final static int IMPROVED_MERGE = 8; |^Z1 D TAw
public final static int HEAP = 9; L*9^-,
n6[bF"v
public static void sort(int[] data) { r^&{0c&o
sort(data, IMPROVED_QUICK); 46*o_A,"
} t(CdoE,6
private static String[] name={ Lm9y!>1"O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0X-u'=Bs
}; er^z:1'
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private static Sort[] impl=new Sort[]{ %WCA?W0:4
new InsertSort(), Vf*!m~]Vqi
new BubbleSort(), (hd^
new SelectionSort(), q~r)B}
new ShellSort(), \CB{Ut+s
new QuickSort(), LS4c|Dv
new ImprovedQuickSort(), oDx*}[/
new MergeSort(), +GgWd=X.Y
new ImprovedMergeSort(), ji`N1e,l
new HeapSort() SZ~Ti|^
}; U n2xZ[4
JTpKF_Za<
public static String toString(int algorithm){ B @UaaWh
return name[algorithm-1]; 'rRo2oTN
} rOB-2@-
xzy7I6X
public static void sort(int[] data, int algorithm) { ,Vt7Kiu
impl[algorithm-1].sort(data); PX[taDN
} ^M PU?k
1okL]VrI
public static interface Sort { abWmPi
public void sort(int[] data); rZe"*$e
} *(s+u~, I
Q<d\K(<3?:
public static void swap(int[] data, int i, int j) { T%KZV/
int temp = data; %]>c4"H
data = data[j]; WhSQ>h!@s
data[j] = temp; 0X`Qt[
} "a-Ex ]
} 7s,IT8ii