[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; x-E@[=
} 4$~A%JN3
int i1=l; m$XMq
int i2=mid+1; TwdY6E3`
for(int cur=l;cur<=r;cur++){ Hl"^E*9x
if(i1==mid+1) 9E`Laf
data[cur]=temp[i2++]; O0`o0!=P
else if(i2>r) <m"fzT<"
data[cur]=temp[i1++]; V -X*e
else if(temp[i1] data[cur]=temp[i1++]; H6o_*Y
else }BFX7X
data[cur]=temp[i2++]; 7+'&(^c
} zCz"[9k
} HpCTQ\H
2!kb?
} h^ o@=%b
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改进后的归并排序: l&JV.}qGB8
8'<RPU}M
package org.rut.util.algorithm.support; g#*LJ`1
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import org.rut.util.algorithm.SortUtil; uW 7Yem&
=Z /*
/** NflwmMJ
* @author treeroot E'g?44vyw
* @since 2006-2-2 .DrGr:UW
* @version 1.0 9*Z!=Y#4,
*/ b)(si/]\
public class ImprovedMergeSort implements SortUtil.Sort { u.yjk/jF
eeVzOq(
private static final int THRESHOLD = 10; TxA%{0
;{j@ia
/* RKb{QAK!v
* (non-Javadoc) OCN:{
* tO}Y=kZa{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NG+%H1!$_
*/ }q?*13iy(
public void sort(int[] data) { };m.8(}$)
int[] temp=new int[data.length]; ^ }kqAmr
mergeSort(data,temp,0,data.length-1); #Fkn-/nL
} G=(ja?d
r?%,#1|$$
private void mergeSort(int[] data, int[] temp, int l, int r) { 7W.z8>p
int i, j, k; 4R}$P1 E
int mid = (l + r) / 2; `Lj'2LoER
if (l == r) E51'TT9
return; ;659E_y>
if ((mid - l) >= THRESHOLD) hd>_K*oH
mergeSort(data, temp, l, mid); %|(Cb!ySX
else =38c}(
insertSort(data, l, mid - l + 1); p!/ *(TT
if ((r - mid) > THRESHOLD) .VA'W16
mergeSort(data, temp, mid + 1, r); KN<KZM
else tq.g4X ;_
insertSort(data, mid + 1, r - mid); ]|8*l]oc
Sp-M:,H3H
for (i = l; i <= mid; i++) { Yu+;vjbK-
temp = data; 19]O;
} `st^i$A
for (j = 1; j <= r - mid; j++) { %) /Bl.{}<
temp[r - j + 1] = data[j + mid]; 70F(`;
} lz:+y/+1
int a = temp[l]; __Egr@
int b = temp[r]; gg?O0W{
for (i = l, j = r, k = l; k <= r; k++) { ;s^F:O
if (a < b) { ^!7|B3`
data[k] = temp[i++]; f>[!Zi*
a = temp; zbZN-j#
} else { fq(3uE]nC
data[k] = temp[j--]; -Gj."ks
b = temp[j]; $h|8z
} Q`HG_n@?
} 4c,{Js
} ;\54(x}|K
z)fg>?AGr
/** [&5%$ T
* @param data {(5M)|>
* @param l ;~"#aL50fe
* @param i jc7NYoT:
*/ l0BYv&tu
private void insertSort(int[] data, int start, int len) { XQStlUw8+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t@cImmh\T
} /g\m7m)u
} !{S HlS
} &eFv~9
} *n*po.Xr
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堆排序： CuAA)Bj
A)HV#T`N
package org.rut.util.algorithm.support; vq8&IL
X8~gLdv8
import org.rut.util.algorithm.SortUtil; I,7n-G_'
oLc
/** v"V?
* @author treeroot pKhV<MFB
* @since 2006-2-2 s-e<&*D[
* @version 1.0 VI;)VJbq
*/ EViDMp"
public class HeapSort implements SortUtil.Sort{ ]cP$aixd
G]E-2 _t7
/* (non-Javadoc) TIVrbO\!o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nA.~}
*/ q/dja
public void sort(int[] data) { m<GJ1)%3i
MaxHeap h=new MaxHeap(); _<7e5VR
h.init(data); L=)Arj@q
for(int i=0;i h.remove(); X0BBJ(e
System.arraycopy(h.queue,1,data,0,data.length); Vbp`Rm1?
} [' cq
(k<__W c_t
private static class MaxHeap{ (T8dh|
dL|*#e
void init(int[] data){ N6uKFQL:{
this.queue=new int[data.length+1]; 4L/8Hj#g
for(int i=0;i queue[++size]=data; (E<QA
fixUp(size); /u pDbP.O
} h%!N!\
} &DX
i4\m/&of3y
private int size=0; [8rl{~9E
X.)D"+xnH
private int[] queue; Y5\=5r/
&BkdC,o
public int get() { gB}UzEj^<
return queue[1]; $LJCup,1"
} }NF7"tOL
#RVN7-x
public void remove() { vF.Ml
SortUtil.swap(queue,1,size--); A9C
fixDown(1); "V:E BR
} O_[]+5.TX
file://fixdown $v~I n
private void fixDown(int k) { PP!}w
int j; r|JZU
while ((j = k << 1) <= size) { RtScv
if (j < size %26amp;%26amp; queue[j] j++; Q+=D#x
if (queue[k]>queue[j]) file://不用交换 -: 8[
break; gs9VCaIa
SortUtil.swap(queue,j,k); @1tv/W
k = j; A"no!AN
} JTfG^Nv>K
} dx[kG
private void fixUp(int k) { 6dQ]=];
while (k > 1) { .+2@(r
int j = k >> 1; cP&XkAQ
if (queue[j]>queue[k]) {, zg
break; ;&U! g&
SortUtil.swap(queue,j,k); [B"CNnA
k = j; WoX,F1o
} ~JSa]6:_+
} i~;Yrc%AEX
<|c[ #f
} r^$WX@ t&
$ZfoJR]%
} :Tn1]a)f6
c(!8L\69V}
SortUtil： EP}NT)z,{
2` j#eB1
package org.rut.util.algorithm; s5D<c'-
2kQa3Pan
import org.rut.util.algorithm.support.BubbleSort; 8[mj*^P
import org.rut.util.algorithm.support.HeapSort; D$/*Z5Z)]
import org.rut.util.algorithm.support.ImprovedMergeSort; h;Se.{
import org.rut.util.algorithm.support.ImprovedQuickSort; @Sd l~'"
import org.rut.util.algorithm.support.InsertSort; 5Q.z#]Lg
import org.rut.util.algorithm.support.MergeSort; ,`;Dre
import org.rut.util.algorithm.support.QuickSort; O*y@4AR"S
import org.rut.util.algorithm.support.SelectionSort; dRPX`%J
import org.rut.util.algorithm.support.ShellSort; xH/Pw?^
&s<'fSI
/** /6d:l>4
* @author treeroot 0 |Y'@&
* @since 2006-2-2 ;OY*`(Id
* @version 1.0 m9m]q&hx
*/ [m{uJdj\
public class SortUtil { kKil]L
public final static int INSERT = 1; " H;iAv
public final static int BUBBLE = 2; +Rb0:r>kU
public final static int SELECTION = 3; ju%t'u\'
public final static int SHELL = 4; P},d`4Ty@
public final static int QUICK = 5; {fAj*,pzl
public final static int IMPROVED_QUICK = 6; fY{&W@#g
public final static int MERGE = 7; Ceco^Mw
public final static int IMPROVED_MERGE = 8; (b4;c=<[{
public final static int HEAP = 9; @gHWU>k,A
- |j4u#z
public static void sort(int[] data) { TWk1`1|
sort(data, IMPROVED_QUICK); kG70j{gf
} [t}$W*hY
private static String[] name={ [Csv/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Fu6~8uDV{{
}; CxW-lU3G`
7d"gRM;
private static Sort[] impl=new Sort[]{ X'KkIo :
new InsertSort(), L fx$M
new BubbleSort(), wk (}q
new SelectionSort(), a0=5G>G9c
new ShellSort(), T{Rhn V1
new QuickSort(), o6~9.~_e
new ImprovedQuickSort(), gBCO>nJws
new MergeSort(), ~76qFZe-
new ImprovedMergeSort(), ZJeTx.Gi6
new HeapSort() v9K{oB
}; ~[d|:]
Z$&i"1{
public static String toString(int algorithm){ dJYQdo^X
return name[algorithm-1]; Bm&%N?9
} \"^.>+
.ECT
public static void sort(int[] data, int algorithm) { ?Pw(
impl[algorithm-1].sort(data); -yH8bm'0"
} FELTmQUV
I:9jn"
public static interface Sort { ,}hJ)
public void sort(int[] data); eFiUB
} &@anv.D
G,6Zy-Y9
public static void swap(int[] data, int i, int j) { O.g!k"nas&
int temp = data; -F+dmI,1$
data = data[j]; 7TW</g(
data[j] = temp; 3(/J(8
} gkN )`/`*
} 5$C]$o}