[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; 'kBg3E$y
} A1>fNilC9
int i1=l; wr);+.T9R
int i2=mid+1; ]M3V]m
for(int cur=l;cur<=r;cur++){ $fifx>!
if(i1==mid+1) 7p1f*N[X
data[cur]=temp[i2++]; !UHWCJ< <w
else if(i2>r) x -;tV=E}
data[cur]=temp[i1++]; n vzk P{
else if(temp[i1] data[cur]=temp[i1++]; ,GOH8h
else EPeKg{w
data[cur]=temp[i2++]; |ppG*ee
} RfoEHN
} j-]`;&L
WSEw:pln
} hK]mnA[Y
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改进后的归并排序: Y#e,NN
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package org.rut.util.algorithm.support; P^'TI[\L9
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import org.rut.util.algorithm.SortUtil; tzIcR #Z
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/** w?#s)z4}g
* @author treeroot *Wj]e%
* @since 2006-2-2 N!~O~Eo3
* @version 1.0 'ug:ic
*/ deLLqdZa
public class ImprovedMergeSort implements SortUtil.Sort { w'uB&z4'
+H{TV#+r
private static final int THRESHOLD = 10; q4MR9ig1E_
^(F@#zN}
/* d#8 n<NM
* (non-Javadoc) [&(~{#}M:
* XoNBq9Iu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IL>VH`D
*/ wK]p`:3
public void sort(int[] data) { {,+{,Ere
int[] temp=new int[data.length]; bZ0{wpeK=
mergeSort(data,temp,0,data.length-1); C))x#P36
} -UB XWl
6 2:FlW>
private void mergeSort(int[] data, int[] temp, int l, int r) { !jWE^@P/B
int i, j, k; ,>p1:pga
int mid = (l + r) / 2; aS! If>
if (l == r) y5{Vx{V"Q
return; LWdA3%
if ((mid - l) >= THRESHOLD) -DuI 6K
mergeSort(data, temp, l, mid); n58yR -"
else fI v?HD:j
insertSort(data, l, mid - l + 1); !!k^M"e2
if ((r - mid) > THRESHOLD) p>N8g#G
mergeSort(data, temp, mid + 1, r); Q}9!aB,
else nEt{ltsS0
insertSort(data, mid + 1, r - mid); ;Zm-B]\
h6b(FTC^
for (i = l; i <= mid; i++) { H)k V8wU
temp = data; QHXA?nBX
} d{J@A;da
for (j = 1; j <= r - mid; j++) { m'zve%G
temp[r - j + 1] = data[j + mid]; Kn=0AdM
} w,i?e\5
int a = temp[l]; =&i#NSK
int b = temp[r]; l*.u rG
for (i = l, j = r, k = l; k <= r; k++) { KCIya[$*
if (a < b) { Y&<]:)
data[k] = temp[i++]; jiejs*
a = temp; S6g_$Q7
} else { ?$K.*])e
data[k] = temp[j--]; e9RH[:
b = temp[j]; h% eGtd$n
} I&U.5wf
} @<.ei)cqb
} IeZ9 "o h
A$M8w9
/** OdbXna
* @param data ff;~k?L
* @param l P;`Awp?
* @param i jF-:e;-
*/ 9}wI@
private void insertSort(int[] data, int start, int len) { 43 vF(<r&f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ..kFn!5(g
} +MZI\>
} D;&\)
} G^sx/H76J
} Xs{PAS0
_7z]zy@PC5
堆排序： {O:{F?
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package org.rut.util.algorithm.support; j1;<3)%0
f^-ot@w
import org.rut.util.algorithm.SortUtil; >F>VlRg
km*Y#`{
/** hVz] wKP
* @author treeroot "O'c.v?{x
* @since 2006-2-2 182g6/,
* @version 1.0 O/U?Wq
*/ HSWki';G
public class HeapSort implements SortUtil.Sort{ {+m8^-T
,CI-IR2
/* (non-Javadoc) a>6D3n W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q6HghG
*/ A%2B3@1'q
public void sort(int[] data) { HC}vO0X4
MaxHeap h=new MaxHeap(); \HIBnkj)3n
h.init(data); !?>QN'p.b
for(int i=0;i h.remove(); Wco2i m
System.arraycopy(h.queue,1,data,0,data.length); *MS$C$HOq
} r.'xqzF/
@ x .`z
private static class MaxHeap{ ;Xf1BG r
c`/VYgcTqB
void init(int[] data){ soLW'8
this.queue=new int[data.length+1]; q9dplEe5
for(int i=0;i queue[++size]=data; {i+ o'Lw
fixUp(size); s=]NKJaQH
} b*Q3j}cZ
} $/lM %yXe
D;s%cL`
private int size=0; `#'j3,\6
wAw1K2d
private int[] queue; .'&pw}F
c:e3hJ
public int get() { PZQAlO,
return queue[1]; ^.R!sQ
} eKy!Pai
w\MWr+4
public void remove() { 4/%fpU2
SortUtil.swap(queue,1,size--); h=S7Z:IaM
fixDown(1); W+GC3W
} Vz$xV!
file://fixdown ,p3]`MG
private void fixDown(int k) { L}CU"
int j; 8{=|<
while ((j = k << 1) <= size) { OPzudO
if (j < size %26amp;%26amp; queue[j] j++; 4D2U,Ds
if (queue[k]>queue[j]) file://不用交换 OX'V
break; Y6&v&dA;
SortUtil.swap(queue,j,k); 'YB[4Q /0
k = j; PJ;WNo8
} 5+11J[~{
} Lu{/"&)
private void fixUp(int k) { G^tazAEfo
while (k > 1) { :'B(DzUR
int j = k >> 1; SzIzQR93&
if (queue[j]>queue[k]) :Fm*WqZu
break; >SLQW
SortUtil.swap(queue,j,k); _}Qtx/Cg
k = j; >O<a9wz
} l;KrFJ6
} }A+ncabm
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} a7c`[
/='0W3+o*L
} rH!sImz,
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SortUtil： 1Xo0(*O
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package org.rut.util.algorithm; kmc_%Wm}
u.|%@
import org.rut.util.algorithm.support.BubbleSort; ,{!,%]bC
import org.rut.util.algorithm.support.HeapSort; EYn?YiVFU
import org.rut.util.algorithm.support.ImprovedMergeSort; w$/lq~zU
import org.rut.util.algorithm.support.ImprovedQuickSort; %-yzU/`JF
import org.rut.util.algorithm.support.InsertSort; rbnAC*y8'L
import org.rut.util.algorithm.support.MergeSort; QK?V^E
import org.rut.util.algorithm.support.QuickSort; s2"`j-iQ
import org.rut.util.algorithm.support.SelectionSort; 4/|x^Ky>G
import org.rut.util.algorithm.support.ShellSort; LT<2 n.S
>#$SaG!
/** 7tXy3-~biz
* @author treeroot SFRP ?s
* @since 2006-2-2 ,\J 8(,%L
* @version 1.0 <wk
*/ !DzeJWM|
public class SortUtil { #<< el;n
public final static int INSERT = 1; L&DjNu`!9
public final static int BUBBLE = 2; Sc]K-]1(H
public final static int SELECTION = 3; iq*im$9J
public final static int SHELL = 4; F$)l8}
public final static int QUICK = 5; 2PYnzAsl
public final static int IMPROVED_QUICK = 6; ;O% H]oN
public final static int MERGE = 7; \KnRQtlI
public final static int IMPROVED_MERGE = 8; TdgK.g 4
public final static int HEAP = 9; o *J*}y
#Z1-+X8P
public static void sort(int[] data) { mA{?E9W
sort(data, IMPROVED_QUICK); udqrHR5
} TG}owG]]
private static String[] name={ y62f{ks_/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sJ|pR=g)!
}; w[ v{)
9^W7i]-Z
private static Sort[] impl=new Sort[]{ S[exnZ*Y
new InsertSort(), -DdHl8
new BubbleSort(), *sOb I(&
new SelectionSort(), 3~T ~Bs
new ShellSort(), ekvs3a^
new QuickSort(), qg& /!\
new ImprovedQuickSort(), vSR&>Q%X
new MergeSort(), ;:D-}t;
new ImprovedMergeSort(), ;.uYWP|9
new HeapSort() #+1|O;PB#
}; -n.m "O3
/IWAU)A0
public static String toString(int algorithm){ YK6LJv}
return name[algorithm-1]; <4; nq~
} 04-_ K
HpEd$+Mz
public static void sort(int[] data, int algorithm) { L]H'$~xx*
impl[algorithm-1].sort(data); ;&&<zWq3h
} uC;_?Bve
3<&:av3
public static interface Sort { YSeH;<'
public void sort(int[] data); >`0U2K
} 2{&A)Z!I
bI &<L O
public static void swap(int[] data, int i, int j) { @4*:qj?
int temp = data; U`qkeNd
data = data[j]; d5l42^Z
data[j] = temp; ZU`9]7"87B
} Uw("+[5O0
} zbxW U]<S?