[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; 0(_l|PScF
} >a3p >2
int i1=l; V5U?F6
int i2=mid+1; >J u]2++lx
for(int cur=l;cur<=r;cur++){ :_Eqf8T
if(i1==mid+1) Jk0r&t7
data[cur]=temp[i2++]; pIbdN/z
else if(i2>r) wO2_DyMm@
data[cur]=temp[i1++]; nYbhy}y
else if(temp[i1] data[cur]=temp[i1++]; $ "Bh]-
else pHoEa7:
data[cur]=temp[i2++]; 4nAa`(62
} R0oKbs{
} :{(w3<i
$<ld3[l i
} f<A5?eKw
.Vq)zi1<
改进后的归并排序: ]tY ^0a
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package org.rut.util.algorithm.support; r=c<--_@
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import org.rut.util.algorithm.SortUtil; #M A4
e L.(p k^<
/** s|y:UgD
* @author treeroot 85;b9k&\M
* @since 2006-2-2 GJqE!I,.
* @version 1.0 *6(kbes
*/ TNJG#8n%Y
public class ImprovedMergeSort implements SortUtil.Sort { MQKfJru7
|pa$*/!NT
private static final int THRESHOLD = 10; uytE^
Et_V,s<|
/* GElvz'S~
* (non-Javadoc) UU8pz{/
* HK+/:'Pu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I7^zU3]Ul
*/ pu,?<@0YK
public void sort(int[] data) { zS]8V?`
int[] temp=new int[data.length]; 7)%+=@
mergeSort(data,temp,0,data.length-1); 67y Tvr@a
} h_d<!
hQNe;R5
private void mergeSort(int[] data, int[] temp, int l, int r) { ;l}- Z@! /
int i, j, k; 1n\ t+F
int mid = (l + r) / 2; ;O<9|?
if (l == r) pStk/te,XK
return; ]\ngX;h8G
if ((mid - l) >= THRESHOLD) (LHp%LaZ\;
mergeSort(data, temp, l, mid); e$Y[Z{T5
else GA`PY-Vs)
insertSort(data, l, mid - l + 1); W[+|}
if ((r - mid) > THRESHOLD) V(Yxh+KU
mergeSort(data, temp, mid + 1, r); %7g:}O$
else 1wW)tNKIF
insertSort(data, mid + 1, r - mid); /k"`7`!
&QNWL]
for (i = l; i <= mid; i++) { l1]p'Liuu
temp = data; s}onsC
} `<[6YH_
for (j = 1; j <= r - mid; j++) { z6py"J@
temp[r - j + 1] = data[j + mid]; /.M+fr S
} gT/@dVV
int a = temp[l]; q$G,KRy/
int b = temp[r]; E\m5%bK\B
for (i = l, j = r, k = l; k <= r; k++) { c]B$i*t
if (a < b) { -YD+(c`l
data[k] = temp[i++]; lO:.OZu
a = temp; jp' K%P
} else { 2DD:~Tbi
data[k] = temp[j--]; 7hy&-<
b = temp[j]; rxO2QQ%V
} fSDi-I
} ~:km]?lz0
} SE7WF18A
76.{0c
/** +h_ !0dG
* @param data U:F/iXz
* @param l 4.RG4Jq
* @param i ~XeFOMq
*/ *Ei|fe$sa
private void insertSort(int[] data, int start, int len) { PA w-6;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _7DkS}NJs
} CQ;]J=|<_
} A8A~!2V
} oUQ07z\C
} @Mvd'.r<;
a^5^gId5l!
堆排序： A[WV'!A,
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package org.rut.util.algorithm.support; Z>)][pL
1y^K/.5-
import org.rut.util.algorithm.SortUtil; #y|V|nd
?[x49Ux,P
/** {K#NB_*To
* @author treeroot ~el3I=KC}
* @since 2006-2-2 P'MY[&|mM'
* @version 1.0 Jw~( G9G
*/ ``ekR6[8c
public class HeapSort implements SortUtil.Sort{ ;O 0+,
4lKVY<
/* (non-Javadoc) vILy>QS)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x_|F|9
*/ ":3 VJ(eY
public void sort(int[] data) { N)% ;jh:T
MaxHeap h=new MaxHeap(); yk2!8
h.init(data); 97!>%d[0
for(int i=0;i h.remove(); z'p:gv]
System.arraycopy(h.queue,1,data,0,data.length); p1c3Q$>i
} >MJ?g-
I|$ RJkD
private static class MaxHeap{ }B7K@Wu#
G1 o70
void init(int[] data){ ^7]"kg DA
this.queue=new int[data.length+1]; *=Z26
for(int i=0;i queue[++size]=data; QH]M
fixUp(size); hl&-\dc+
} g/=K.
} }Vu\(~
6I_Hd>4
private int size=0; N?dvuB
^BZkHAp
private int[] queue; bU 63X={
,D6v4<jh
public int get() { m\/(w_/?
return queue[1]; R6 XuA(5
} }G$]LWgQx
yz+, gLY
public void remove() { t)oapIeIe
SortUtil.swap(queue,1,size--); "x'),
fixDown(1); B@Nt`ky0*
} h?\2_s
file://fixdown b=a!j=-D
private void fixDown(int k) { ea=83 Zj
int j; 'cDx{?
while ((j = k << 1) <= size) { cD1o"bq
if (j < size %26amp;%26amp; queue[j] j++; !e#xx]v3
if (queue[k]>queue[j]) file://不用交换 ihT~xt
break; URcR
SortUtil.swap(queue,j,k); Uh.Zi3X6}6
k = j; !k$}Kj)I
} H]<]^Zmjy
} (UNtRz'=;
private void fixUp(int k) { B6Ej{q^k,
while (k > 1) { ~fz[x9\
int j = k >> 1; $N$ FtpB
if (queue[j]>queue[k]) vAP{;Q0i
break; j*T]HaM
SortUtil.swap(queue,j,k); (\puf+
k = j; [-*F"}D,
} 5=?i;P
} "fQRk
P4 ul[zZ
} ,gnQa
LE?u`i,e=+
} O}Ui`eWU
[_y@M ]
SortUtil： ]6tkEyuq
tqOi x/
package org.rut.util.algorithm; Ccfwax+
c(-Mc6
import org.rut.util.algorithm.support.BubbleSort; xSpC'"
import org.rut.util.algorithm.support.HeapSort; k7_I$<YDj
import org.rut.util.algorithm.support.ImprovedMergeSort; Z#`0txCF
import org.rut.util.algorithm.support.ImprovedQuickSort; SP 2 8
import org.rut.util.algorithm.support.InsertSort; -7'#2P<)
import org.rut.util.algorithm.support.MergeSort; 9CUimZ
import org.rut.util.algorithm.support.QuickSort; #:3r4J%+~
import org.rut.util.algorithm.support.SelectionSort; %IpSK 0<Sp
import org.rut.util.algorithm.support.ShellSort; KGZ?b2N?Va
_J?SIm
/** zW{ 6Eg
* @author treeroot ;'RFo?u K
* @since 2006-2-2 }F`beoMAkM
* @version 1.0 VmQh$&h
*/ @kngI7=E
public class SortUtil { 1TqF6`;+
public final static int INSERT = 1; P`s(kIe
public final static int BUBBLE = 2; Ri:p8
public final static int SELECTION = 3; DOD6Liau{Q
public final static int SHELL = 4; =.m6FRsU
public final static int QUICK = 5; X<Za9
public final static int IMPROVED_QUICK = 6; b5ie <s
public final static int MERGE = 7; UPCQs",
public final static int IMPROVED_MERGE = 8; coQ[@vu
public final static int HEAP = 9; [ET6(_=b
DM7}&~
public static void sort(int[] data) { 1JTbCS
sort(data, IMPROVED_QUICK); 9+CFRYC
} zjbE 7^N
private static String[] name={ PNF4>)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AvRcS]@=
}; Pw}_[[>$
[J\DB)V/
private static Sort[] impl=new Sort[]{ +h[e0J|v{
new InsertSort(), p?rK`$U+J
new BubbleSort(), ;?6>mh(`
new SelectionSort(), L@|#Bbmx
new ShellSort(), y{rn-?`{
new QuickSort(), C@dGWAG
new ImprovedQuickSort(), F%6*Df;cSe
new MergeSort(), #0MK(Ut/
new ImprovedMergeSort(), qR,.W/eS8
new HeapSort() *M!kA65'
}; `ENP=kL(+
./maY1>T
public static String toString(int algorithm){ UC9{m252
return name[algorithm-1]; (:?&G9k "
} 'tWAuI
SfI*bJo>V
public static void sort(int[] data, int algorithm) { 9G:TW|)L[Q
impl[algorithm-1].sort(data); 'XfgBJF=
} Md9l+[@
Fn,k!q
public static interface Sort { vnsSy33K
public void sort(int[] data); (DJvi6\H
} cb+y9wA
QaMDGD
public static void swap(int[] data, int i, int j) { z}5<$K_U
int temp = data; )bW5yG!
data = data[j]; fcAIg(vW
data[j] = temp; ]t/f<jKN^
} G*\sdBW!k
} _'JRo%{xGX