[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; d"uR1rTk
} FVT_%"%C9
int i1=l; ]plg@
int i2=mid+1; '81$8xxdY
for(int cur=l;cur<=r;cur++){ ,sP7/S)FR
if(i1==mid+1) qbu Lcy3
data[cur]=temp[i2++]; m*|3
else if(i2>r) {l.) *#O
data[cur]=temp[i1++]; 'y}l9alF
else if(temp[i1] data[cur]=temp[i1++]; xKEHNgen
else tn+i5Eso
data[cur]=temp[i2++]; *5sr\b4#S
} 1Jc-hrN-
} g&O%qX-
5G'X\iR
} ^4x(a&
tx}{E<\>$
改进后的归并排序: }:5r#Cd
9yajtR
package org.rut.util.algorithm.support; }7+G'=XI/
N-]h+Cnyu
import org.rut.util.algorithm.SortUtil; x&+/da-E/5
{$bAs9L
/** U:~O^
* @author treeroot !FZb3U@
* @since 2006-2-2 ;B o2$
* @version 1.0 > YKvwbCf8
*/ :g}WN
public class ImprovedMergeSort implements SortUtil.Sort { Ui@Q&%b
,E$^i~OO
private static final int THRESHOLD = 10; X_Is#&6;
&48wa^d
/* *I(>[m!
* (non-Javadoc) Jj*XnL*
* ,;y5Mu8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {[61LQ6V9
*/ UMpC2)5
public void sort(int[] data) { )i0\U
int[] temp=new int[data.length]; Ra&HzK?
mergeSort(data,temp,0,data.length-1); `n Y!nh6!
} |0ACapp!
tk|Ew!M:
private void mergeSort(int[] data, int[] temp, int l, int r) { 0qnToV;
int i, j, k; hvQOwA;e
int mid = (l + r) / 2; 2Y\,[$z
if (l == r) B<xBuW
return; M,8a$Mdqh
if ((mid - l) >= THRESHOLD) K:c5Yq^
mergeSort(data, temp, l, mid); lV]hjt-L 2
else BOrfKtG\
insertSort(data, l, mid - l + 1); ~zi6wu(3
if ((r - mid) > THRESHOLD) @ >%I\
mergeSort(data, temp, mid + 1, r); &=nwb4
else Uxn_nh
insertSort(data, mid + 1, r - mid); ~4.Tq{
;3h[=hyS
for (i = l; i <= mid; i++) { OvX z+C,
temp = data; Z+' 7c|a
} BR8z%R
for (j = 1; j <= r - mid; j++) { .<gAa"
temp[r - j + 1] = data[j + mid]; xv]P-q0
} $T8Ni!#/C
int a = temp[l]; <oS2a/Nd
int b = temp[r]; #b4`Wcrj
for (i = l, j = r, k = l; k <= r; k++) { .wtb7U;7
if (a < b) { #yFDC@gH1
data[k] = temp[i++]; ;}#tm9S;
a = temp; 8OqG{jmG
} else { n AQB
data[k] = temp[j--]; *JZU 0Xb
b = temp[j]; U`ey7
} ,oT?-PC$z
} LUna stA^
} wr~# rfH
MIub^ $<C
/** .!\y<9
* @param data 1RY}mq
* @param l _FeLSk.
* @param i 4>uz'j<
*/ wz+
private void insertSort(int[] data, int start, int len) { R{NmWj['Mg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'C]zB'H=
} _&DI_'5q+
} ^SpD)O{
} WpP8J1KN[
} br.jj
{ .B^
堆排序： bqJL@!T
y-cRqIM
package org.rut.util.algorithm.support; W(E!:
f]^(|*6
import org.rut.util.algorithm.SortUtil; S7P](F=n#
F[ N{7C3
/** sI,T"D?
* @author treeroot YC - -&66
* @since 2006-2-2 , b ,`;I
* @version 1.0 1`Cr1pH
*/ z\*ii<-@
public class HeapSort implements SortUtil.Sort{ v*7}ux8
|y)Rlb#d
/* (non-Javadoc) AH{]tE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !R-M:|
*/ fLA!oeq{&}
public void sort(int[] data) { sn '#]yM
MaxHeap h=new MaxHeap(); }o0R`15dA
h.init(data); "1$OPt5
for(int i=0;i h.remove(); {(U?)4@
System.arraycopy(h.queue,1,data,0,data.length); 8`Q8Mct$<
} }i!hzkK#
F&<si:}KB
private static class MaxHeap{ /B.\6
):; &~
void init(int[] data){ >KH.~Jfy
this.queue=new int[data.length+1]; ?DzKqsS'
for(int i=0;i queue[++size]=data; x* *]@v"g
fixUp(size); cod__.
} r0379 _
} oFB~)}f<v
r&@#,g
private int size=0; 75v 5/5zRn
Bwj^9J/ob
private int[] queue; } 1^/[?
6T! *YrS
public int get() { 'e^,#L_!o
return queue[1]; y/k6gl[`
} IeLG/ fB
R$X1Q/#md
public void remove() { }dX[u`zQ
SortUtil.swap(queue,1,size--); N`1:U 4}
fixDown(1); 2>p K
} 58\Rl
file://fixdown bq/m?;
private void fixDown(int k) { {P"$;_Y"<
int j; D+lzISp~e
while ((j = k << 1) <= size) { B!0o6)u'
if (j < size %26amp;%26amp; queue[j] j++; >&6pBtC_
if (queue[k]>queue[j]) file://不用交换 [tGAo/
break; D^yZ!}Kl
SortUtil.swap(queue,j,k); -'BC*fVr
k = j; /{vv n
} _W'>?e0i
} CMB:%
private void fixUp(int k) { A&*lb7X
while (k > 1) { ()e.J
int j = k >> 1; +dq&9N/
if (queue[j]>queue[k]) ];i-d7C
break; izy7.(.a
SortUtil.swap(queue,j,k); Tqz{{]%j~$
k = j; :#s6,
} bO]^TRaiJ
} !#j y=A
43-mv1>.
} 2a8ZU{wjn
vh5`R/<3
} f2ygN6(>
6SI`c+'@5
SortUtil： {XH!`\
va F^[/ (g
package org.rut.util.algorithm; =Ryh@X&
M]4qS('[
import org.rut.util.algorithm.support.BubbleSort; ,r~pf(nz
import org.rut.util.algorithm.support.HeapSort; JX8Hn |
import org.rut.util.algorithm.support.ImprovedMergeSort; QxZYy}2
import org.rut.util.algorithm.support.ImprovedQuickSort; t0h@i`
import org.rut.util.algorithm.support.InsertSort; X`xmV!
import org.rut.util.algorithm.support.MergeSort; C"}CD{<H]M
import org.rut.util.algorithm.support.QuickSort; KU#w%
import org.rut.util.algorithm.support.SelectionSort; mRU-M|
import org.rut.util.algorithm.support.ShellSort; cK4Q! l6O
Xu\FcQ{
/** 12qX[39/
* @author treeroot lx_jy>$}r
* @since 2006-2-2 vVB8zS~l ,
* @version 1.0 {:BAh5e|
*/ Y'7f"W
public class SortUtil { JAJo^}}{b
public final static int INSERT = 1; hr3RC+ y
public final static int BUBBLE = 2; >a/]8A
public final static int SELECTION = 3; Gu[G_^>
public final static int SHELL = 4; lz=$Dz
public final static int QUICK = 5; LA &W@
public final static int IMPROVED_QUICK = 6; \) DJo
public final static int MERGE = 7; )7!q>^S{B
public final static int IMPROVED_MERGE = 8; Jm8{@D%
public final static int HEAP = 9; gZ vX~
9n4vuBgv
public static void sort(int[] data) { 5-'jYp/
sort(data, IMPROVED_QUICK); uqe{F+;8&
} 7i^7sT8t
private static String[] name={ h0}r#L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4UwXrEQp
}; u~SvR~OE
Hl-!rP.?0
private static Sort[] impl=new Sort[]{ ?^I\e{),c
new InsertSort(), #-vuY#gs
new BubbleSort(), _2uRY
new SelectionSort(), !bs{/?
new ShellSort(), V&nTf100
new QuickSort(), .m%/JquMFM
new ImprovedQuickSort(), E57:ap)/
new MergeSort(), 6r
new ImprovedMergeSort(), );EW(7KeL
new HeapSort() }]O* yFR{j
}; OXu*wl(z
pT3p!/pl3
public static String toString(int algorithm){ tuH8!.
return name[algorithm-1]; Itq248+Ci
} @ 3n;>oi
-M=#U\D
public static void sort(int[] data, int algorithm) { *Iy5 V7`KU
impl[algorithm-1].sort(data); 5?6U@??]
} D<=x<.
R>Q&Ax
public static interface Sort { Ja1[vO"YgP
public void sort(int[] data); ;k1\-
} 'dJ#NT25
{Yq"%n'0
public static void swap(int[] data, int i, int j) { EJC{!06L'/
int temp = data; )}ygzKEa
data = data[j]; }U <T>0
data[j] = temp; uWm,mGd9
} st~ 1[in
} F3d: W:^_