[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; Mo|5)8_
} *n?:)(
int i1=l; JY8pV+q @=
int i2=mid+1; F>R)~;Ja
for(int cur=l;cur<=r;cur++){ LB+=?Mz V
if(i1==mid+1) %b4(wn?n:B
data[cur]=temp[i2++]; I;Y`rGj
else if(i2>r) r(CL=[
data[cur]=temp[i1++]; z{WqICnb
else if(temp[i1] data[cur]=temp[i1++]; ToM*tXj
else yvwcXNXR@
data[cur]=temp[i2++]; o[6"XJ
} XYTcG;_z
} D|#(zjl@
&g>+tkC
} hG3Lj7)UH
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改进后的归并排序: V7i`vo3Cc
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package org.rut.util.algorithm.support; {0{$.L
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import org.rut.util.algorithm.SortUtil; "evV/Fg(
&"n9,$
/** SVz.d/3Y
* @author treeroot }CqIKoX.
* @since 2006-2-2 zKT<QM!`
* @version 1.0 8}@a?QS(&
*/ <9ph c
public class ImprovedMergeSort implements SortUtil.Sort { a8c]B/
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private static final int THRESHOLD = 10; PyE<`E
#+nv,?@
/* dBn.DU*B
* (non-Javadoc) `d#_66TLr
* +=$G6uR$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j'n= Xh
*/ ;r}<o?'RM
public void sort(int[] data) { &p/k VM
int[] temp=new int[data.length]; >@iV!!
mergeSort(data,temp,0,data.length-1); biK.HL\V
} &|*|
.C?gnOq
private void mergeSort(int[] data, int[] temp, int l, int r) { I]1fH
int i, j, k; .?NAq[H%
int mid = (l + r) / 2; vkmR cX:/
if (l == r) -&tiM v
return; =p$Wo
if ((mid - l) >= THRESHOLD) 1t'\!
mergeSort(data, temp, l, mid); "rJL ^ \r
else 4ebGAg?_
insertSort(data, l, mid - l + 1); xy>mM"DOH
if ((r - mid) > THRESHOLD) *%sYajmD
mergeSort(data, temp, mid + 1, r); (^\i(cfu6Q
else '5\1uB PKW
insertSort(data, mid + 1, r - mid); aR $P}]H
+M:Q!'
for (i = l; i <= mid; i++) { |05LHwb>
temp = data; @DR&e^Zz
} 9hU@VPB~
for (j = 1; j <= r - mid; j++) { &Y$rVBgQ
temp[r - j + 1] = data[j + mid]; H\vO0 <X
} 5H2|:GzUc
int a = temp[l]; THVF@@q
int b = temp[r]; V"73^
for (i = l, j = r, k = l; k <= r; k++) { *^ BE1-
if (a < b) { yD"sYT
data[k] = temp[i++]; Mk;j"ZDF
a = temp; 0}N^l=jQ
} else { Fsh-a7Qp
data[k] = temp[j--]; plAt +*&
b = temp[j]; cPSu!u}D
} EbHeP
} 2$=HDwv
} +0DIN4Y(4
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/** Fy^\Uw
* @param data uv!/DX#
* @param l 0:EiCKb)ol
* @param i K9=_}lS@'
*/ Ygb#U'|
private void insertSort(int[] data, int start, int len) { Z(P#]jI]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nFSa~M
} wDk[)9#A
} xB#E&}Ho
} cAS5&T<
} HS7!O
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堆排序： r{_'2Z_i
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package org.rut.util.algorithm.support; I\_R& v
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import org.rut.util.algorithm.SortUtil; TXM.,5Dx\
*(rE<
/** l{4\Wn Va
* @author treeroot Oc>-jhx?
* @since 2006-2-2 b;{C1aa>}
* @version 1.0 )NK2uD
*/ RWE%?`
public class HeapSort implements SortUtil.Sort{ K^ lVng
Gex^\gf
/* (non-Javadoc) %oo&M;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =zKp(_[D
*/ x$E l7=.
public void sort(int[] data) { EMo6$(
MaxHeap h=new MaxHeap(); "M tQj}
h.init(data); >*MB_m2|
for(int i=0;i h.remove(); 6dh PqL
System.arraycopy(h.queue,1,data,0,data.length); Velmq'n
} foeVjL:T
tj0vB]c
private static class MaxHeap{ /zWWUl`:
+-"#GL~cC
void init(int[] data){ HFazqQ[
this.queue=new int[data.length+1]; tkmW\
for(int i=0;i queue[++size]=data; )Jc>l;G(M
fixUp(size); C+Z"0\{o
} @fwU%S[v
} ,F[mh
VF-d^AGt
private int size=0; h$!qb'|
vR,'':
private int[] queue; ^iTA40K
W[jxfZD9v
public int get() { P|?z1JUd
return queue[1]; >Et?7@
} >h9U~#G=
:A$6Y*s\
public void remove() { 8Xr3q eh+
SortUtil.swap(queue,1,size--); K;95M^C\O*
fixDown(1); ;u%hwlo
} #%5>}$
file://fixdown sM-*[Q=_
private void fixDown(int k) { "~ /3
int j; xfzR>NU
while ((j = k << 1) <= size) { u0,~pJvX
if (j < size %26amp;%26amp; queue[j] j++; `'>>[*06:a
if (queue[k]>queue[j]) file://不用交换 La!PGZ{
break; p4[W@JV
SortUtil.swap(queue,j,k); 5^xt/vYa)
k = j; 5FMKJ7sC9
} 8|l Yf%n>j
} h\5 7t@A
private void fixUp(int k) { 1li`+~L F
while (k > 1) { (#:Si~3
int j = k >> 1; ;9~z_orNQZ
if (queue[j]>queue[k]) }yw\+fc
break; {*2A%}S
SortUtil.swap(queue,j,k); U{x'@/Ld
k = j; kB 2bT}
} sw&Qks?V
} v6GWD}HH,
u32<=Q[
} zb<+x(0y"
&$=F$
} ; ^$RG
B}Qo8i7 z
SortUtil： \8pbPo=x
g/E;OcFaO
package org.rut.util.algorithm; >eXNw}_j
|LQmdgVr$
import org.rut.util.algorithm.support.BubbleSort; 9.R_=
import org.rut.util.algorithm.support.HeapSort; `>*P(yIN
import org.rut.util.algorithm.support.ImprovedMergeSort; dcA0k
import org.rut.util.algorithm.support.ImprovedQuickSort; IoX(Pa
import org.rut.util.algorithm.support.InsertSort; L/ZZe5I
import org.rut.util.algorithm.support.MergeSort; #Ky0` n
import org.rut.util.algorithm.support.QuickSort; F,D&
import org.rut.util.algorithm.support.SelectionSort; V$@2:@8mo
import org.rut.util.algorithm.support.ShellSort; vD(;VeW[
lyV]-w
/** dug RO[
* @author treeroot 3S,pd0;
* @since 2006-2-2 ex['{|a{
* @version 1.0 kSDV#8uZ
*/ `XD$1>
public class SortUtil { q<1@ut
public final static int INSERT = 1; Ii9vA ^53
public final static int BUBBLE = 2; O~D}&M@/R
public final static int SELECTION = 3; 6hZhD1lDG^
public final static int SHELL = 4; #<JrSl62(K
public final static int QUICK = 5; ua{eri[
public final static int IMPROVED_QUICK = 6; Ze~\=X" "
public final static int MERGE = 7; E )PEKWK\
public final static int IMPROVED_MERGE = 8; ^O?$}sr
public final static int HEAP = 9; D&'".N,}
[:o#d`^
public static void sort(int[] data) { ~5|a9HV:
sort(data, IMPROVED_QUICK); ^mGTZxO
} _V;J7Vz
private static String[] name={ wjl?@K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +V) (,f1
}; QW!'A`*x
y0Tb/&xN
private static Sort[] impl=new Sort[]{ LC}]6
new InsertSort(), (]pQ.3
new BubbleSort(), l`1ZS8 [.
new SelectionSort(), \h yTcFb
new ShellSort(), koUH>J:
new QuickSort(), t^YDCcvoQ
new ImprovedQuickSort(), JvG t=v
new MergeSort(), Vf:t!'WD?2
new ImprovedMergeSort(), |XsW)/
new HeapSort() u&<LW4
}; iZ58;`
ZpZ~[BtQ
public static String toString(int algorithm){ mdk:2ndP
return name[algorithm-1]; ^^[,aBu
} :\>UZ9h #
o;O_N^_W
public static void sort(int[] data, int algorithm) { 9uq| VU5
impl[algorithm-1].sort(data); A_g'9
} -uh/W=Q1R
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public static interface Sort { BG|Kw)z*KM
public void sort(int[] data); [Nq4<NK
} H95VU"
EH[?*>+s
public static void swap(int[] data, int i, int j) { ,Pl[SMt!
int temp = data; 7(oxmv}#Q
data = data[j]; Q:-/@$&i
data[j] = temp; E/am^ TO`
} <l\FHJhjq
} bi_R.sfK&