[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; y[ dBmTY
} Orq/38:4G
int i1=l; u nv:sV#b
int i2=mid+1; JG!B3^qB
for(int cur=l;cur<=r;cur++){ >+%#m'Y&&
if(i1==mid+1) 5eTA]
data[cur]=temp[i2++]; &ivU4rEG
else if(i2>r) Ub3$`
data[cur]=temp[i1++]; QEJu.o
else if(temp[i1] data[cur]=temp[i1++]; oZ%uq78#[%
else &hWELZe0vv
data[cur]=temp[i2++]; b-&rMML
} iE'_x$i
} lju5+0BSb
2y!n c%
} ?IGp?R^j"
6Ryc&z5
改进后的归并排序: 84(Jo_9
5=TgOS]R
package org.rut.util.algorithm.support; +p\E%<uQ
@D9O<x
import org.rut.util.algorithm.SortUtil; zB%~=@Q^6
0!\gK<,z
/** Exwd,2>
* @author treeroot Q,NnB{R
* @since 2006-2-2 \Tz|COG5h\
* @version 1.0 XC3)#D#HGh
*/ o9xc$hX}
public class ImprovedMergeSort implements SortUtil.Sort { *ra)u-
]t0o%w
private static final int THRESHOLD = 10; 5Dkb/Iagi
s@L ;3WdO
/* )q<VZ|V
* (non-Javadoc) k4sV6f
* ^2'Y=g>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y][12{I{
*/ LW<LgN"L-
public void sort(int[] data) { V6merT79
int[] temp=new int[data.length]; ci;2XLAM
mergeSort(data,temp,0,data.length-1); mP^B2"|q
} #eJfwc1JY
I"x'
private void mergeSort(int[] data, int[] temp, int l, int r) { Vg$d|m${
int i, j, k; F+*E}QpM
int mid = (l + r) / 2; 6[t<g=
if (l == r) ~ikp'5
return; ?62zv[#
if ((mid - l) >= THRESHOLD) hrniZ^
mergeSort(data, temp, l, mid); [+WsVwyf?
else mu B Y
insertSort(data, l, mid - l + 1); XoyxS:=>|[
if ((r - mid) > THRESHOLD) :cA P{rSe
mergeSort(data, temp, mid + 1, r); C@-Hm
else 8>x5|
insertSort(data, mid + 1, r - mid); [],[LkS
EeYL~ORdi
for (i = l; i <= mid; i++) { CAc]SxLh
temp = data; AON |b\?
} ~?NCmU=3
for (j = 1; j <= r - mid; j++) { 8ve-g\C8 H
temp[r - j + 1] = data[j + mid]; v o:KL%)
} >"/TiQt
int a = temp[l]; ewcFzlA@
int b = temp[r]; !hHe`
for (i = l, j = r, k = l; k <= r; k++) { ^6Aa^|
if (a < b) { 8g=O0Gb
data[k] = temp[i++]; S*Ea" vBA
a = temp; 2[Bbdg[O
} else { ,i*rHMe
data[k] = temp[j--]; `)O9 '568
b = temp[j]; Ls2OnL9
} @6ckB (
} )nHMXZ>Td
} MQ =x:p{
Z&^vEQ
/** \B')2phE
* @param data 3JD62wtx
* @param l ;*5z&1O
* @param i bAt!S
*/ ta&z lZt
private void insertSort(int[] data, int start, int len) { iB0r+IbR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U,b80%k:
} MO~T_6
} Cnpl0rV~5
} {ZUk!o>m@
} +Vg(2Xt
bN?*p($/
堆排序： L@MCB-@V
,8*A#cT B
package org.rut.util.algorithm.support; <w&'E6mU
0084`&Ki
import org.rut.util.algorithm.SortUtil; B)/&xQu
EW]DzL3
/** >0kL9_9{
* @author treeroot <2*+Y|Lk2
* @since 2006-2-2 23LG)or.JC
* @version 1.0 ]>)}xfL &,
*/ u9;3Xn8
public class HeapSort implements SortUtil.Sort{ e|A=sCN-
%w_MRC
/* (non-Javadoc) !T`g\za/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8k{XUn
*/ bIT[\Q
public void sort(int[] data) { SMvlEj^
MaxHeap h=new MaxHeap(); 5@.8O VPz
h.init(data); KUW )F
for(int i=0;i h.remove(); <> =(BAw
System.arraycopy(h.queue,1,data,0,data.length); 9on$0
} >o"s1* {
xD7Y"%Pbx
private static class MaxHeap{ >a@1y8B
uYTyR;a
void init(int[] data){ =2Ju)!%wr
this.queue=new int[data.length+1]; -X EK[
for(int i=0;i queue[++size]=data; ;Qd'G7+
fixUp(size); H"+|n2E^
} H|s Iw:
} W*H%\Y:N
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private int size=0; O0^Y1l
1|*%
private int[] queue; t":^:i'M
[9EL[}
public int get() { #)D$\0ag
return queue[1]; $LR~c)}1I
} un6W|{4]
4xx?x/q
public void remove() { 6wiuNGZb
SortUtil.swap(queue,1,size--); M9V,;*
fixDown(1); 3rh t5n2-
} ,vi6<C\
file://fixdown (4l M3clF
private void fixDown(int k) { 9Lt3^MKa"
int j; YbVZK4
while ((j = k << 1) <= size) { mznE Cy
if (j < size %26amp;%26amp; queue[j] j++; q+YK NXI
if (queue[k]>queue[j]) file://不用交换 <y-2ovw*
break; cCtd\/ \
SortUtil.swap(queue,j,k); qzD
k = j; K(mzt[n(
} C/"Wh=h6
} k:s86q
private void fixUp(int k) { -% B)+yq>
while (k > 1) { k<*1mS8
int j = k >> 1; ,J*#Ixe}
if (queue[j]>queue[k]) a;7gy419<p
break; #z}IW(u<
SortUtil.swap(queue,j,k); c_?!V
k = j; S r7EcT-
} (>D{"}
} IOUzj{G#
K!jau|FS
} +/*A}!#v
w RTzpG4
} NLWj5K)1P
RV5;EM)~[
SortUtil： P>6wr\9i[
>m9ge`!9
package org.rut.util.algorithm; 6mrfkYK
)N ^g0L
import org.rut.util.algorithm.support.BubbleSort; {7Ez7'SVV
import org.rut.util.algorithm.support.HeapSort; ctC!b{S"@
import org.rut.util.algorithm.support.ImprovedMergeSort; kZ_5R#xK
import org.rut.util.algorithm.support.ImprovedQuickSort; ~o;*{ Q
import org.rut.util.algorithm.support.InsertSort; jK=-L#hz
import org.rut.util.algorithm.support.MergeSort; d~d~Cd`V
import org.rut.util.algorithm.support.QuickSort; ]s_BOt
import org.rut.util.algorithm.support.SelectionSort; Cvs4dd%)i
import org.rut.util.algorithm.support.ShellSort; ;S>ml
f#vVk
/** wmv/?g
* @author treeroot Vzrp9&loY
* @since 2006-2-2 vn5]+-I
* @version 1.0 ! F&{I
*/ d7QWK(d
public class SortUtil { n;dp%SD
public final static int INSERT = 1; FJ&?My,=J
public final static int BUBBLE = 2; .!Q[kn0a
public final static int SELECTION = 3; \h/aD1&g
public final static int SHELL = 4; l< |)LDq~
public final static int QUICK = 5; r+l3J>:K
public final static int IMPROVED_QUICK = 6; !U+XIr
public final static int MERGE = 7; {,m W7
public final static int IMPROVED_MERGE = 8; l3/?,xn
public final static int HEAP = 9; 9s6d+HhM
c/}bx52>u
public static void sort(int[] data) { *}i.,4+y
sort(data, IMPROVED_QUICK); F_%&,"$
} FU~:9EEx
private static String[] name={ G0h7MO%x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" blB00
}; 4[]4KKO3Q2
@xtfm.}
private static Sort[] impl=new Sort[]{ au1(.(
new InsertSort(), C@ z^{Z+
new BubbleSort(), \xaK?_hv
new SelectionSort(), g*#.yC1/
new ShellSort(), gTP0:
new QuickSort(), Hq$?-%4
new ImprovedQuickSort(), Co>=<\yi
new MergeSort(), U,u\o@3A
new ImprovedMergeSort(), '.DFyHsq
new HeapSort() ~lLIq!!\
}; ugt|'i
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public static String toString(int algorithm){ nz]+G2h
return name[algorithm-1]; 6ax|EMw
} djcCm5m
1vBXO bk
public static void sort(int[] data, int algorithm) { pEE.%U
impl[algorithm-1].sort(data); /e}NZo{)g
} p[%FH?
[& &9F};
public static interface Sort { P\CT|K'P
public void sort(int[] data); RoWGQney
} pTJJ.#$CEF
h{cJ S9e}
public static void swap(int[] data, int i, int j) { vJfex,#lv
int temp = data; t1YVE%`w
data = data[j]; *7o(
data[j] = temp; t/aT
} Bq]eNq
} x, ^j=n