[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; |sI^_RdBv
} )N}xKw|
int i1=l; bDr'W
int i2=mid+1; `xtN+y F
for(int cur=l;cur<=r;cur++){ c`iSe$eS
if(i1==mid+1) .D7\Hao
data[cur]=temp[i2++]; I($u L@$
else if(i2>r) lFB Ka ,6
data[cur]=temp[i1++]; Qc3!FW<26
else if(temp[i1] data[cur]=temp[i1++]; 0xPML}|V
else Db2G)63
data[cur]=temp[i2++]; =^{^KHzIl3
} _z}d yp"I
} ^lQej%
t$}+oCnkv
} m,*f6g
g]3-:&F{c
改进后的归并排序: :cOwTW?Fj
H(0d(c1s
package org.rut.util.algorithm.support; Vbwbc5m}
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import org.rut.util.algorithm.SortUtil; ^m5{:\ Xk
}#Vo XilX
/** "e_ED*
* @author treeroot v+\E%H
* @since 2006-2-2 7$^V_{ej
* @version 1.0 N%^mR>.`
*/ fBQZ=zh
public class ImprovedMergeSort implements SortUtil.Sort { r"0nUf*og:
r*WdD/r|
private static final int THRESHOLD = 10; =P5SFMPN
yX8F^iv[
/* !{SEm"J^
* (non-Javadoc) _/KW5
* KYlWV<sR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5uu{f&?u)
*/ +8~S28"Wg3
public void sort(int[] data) { cW MZw|t
int[] temp=new int[data.length]; )>=`[$D1t
mergeSort(data,temp,0,data.length-1); hwexv 9""
} ^tpy8TQ
6H3_qx
private void mergeSort(int[] data, int[] temp, int l, int r) { z9VQsC'K
int i, j, k; @m(\f
int mid = (l + r) / 2; Ron^PvvY&
if (l == r) F9d][ P@@
return; ?Ww',e
if ((mid - l) >= THRESHOLD) A^g81s.5
mergeSort(data, temp, l, mid); N`#v"f<~Q
else M>0~Ek%3
insertSort(data, l, mid - l + 1); xE+Go
if ((r - mid) > THRESHOLD) zmuq4-.
mergeSort(data, temp, mid + 1, r); hI?<F^b
else Y\j &84
insertSort(data, mid + 1, r - mid); /0(4wZe~?
XbHcd8N T
for (i = l; i <= mid; i++) { Bw{W-&$o
temp = data; E6n;_{Se/S
} <@Ew-JU
for (j = 1; j <= r - mid; j++) { ?lbX.+
temp[r - j + 1] = data[j + mid]; Gk!v-h9cq
} L*FnFRhU
int a = temp[l]; k5<lkC2z
int b = temp[r]; 8o~\L= l
for (i = l, j = r, k = l; k <= r; k++) { _msDf2e9
if (a < b) { !4 6^}3
data[k] = temp[i++]; :CH'Bt4<
a = temp; {Q4=GrS
} else { J,IOp-
data[k] = temp[j--]; ^up*KQ3u\
b = temp[j]; N["(ZSS
} :s8,i$Ex
} DrW]`%Ql
} FxD"z3D
n)pBK>+
/** b5yb~;0
* @param data );=JoRQ{
* @param l }p&aI?-B
* @param i |4dNi1{Zd
*/ Ef7Kx49I
private void insertSort(int[] data, int start, int len) { 654PW9{(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z3[,Xw
} D@\97t+
} o6{XT.z5qx
} c5Offnq'1
} {\ .2h
2b!b-
堆排序： ZW,PZ<
z?V> ST
package org.rut.util.algorithm.support; 4N*^%
k"AY7vq@!P
import org.rut.util.algorithm.SortUtil; 'X`\vTxB
hI/p9 `w
/** uE/qraA
* @author treeroot g|2D(J
* @since 2006-2-2 #&DJ3(T
* @version 1.0 ,$CZ(GQ
*/ 3aW4Gs<g
public class HeapSort implements SortUtil.Sort{ #He:p$43
J,jl(=G
/* (non-Javadoc) mD|<qsY)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0E++
*/ KX*e2 /0
public void sort(int[] data) { LZ^sc
MaxHeap h=new MaxHeap(); zu*h9}
h.init(data); d'DS7F(c{
for(int i=0;i h.remove(); I|BLAm6j
System.arraycopy(h.queue,1,data,0,data.length); Ph-3,cC
} ?5Lom#^
vR:t4EJ`
private static class MaxHeap{ q!NwfXJM
qf ]ax!bK
void init(int[] data){ {'{ssCL
this.queue=new int[data.length+1]; g%^Zq"
for(int i=0;i queue[++size]=data; h~<#1'/<
fixUp(size); .llAiv
} *mBn''a"*
} M~3(4,
LG51e7_gFi
private int size=0; hWuq
6s>PZh
private int[] queue; Qza[~6
8B\,*JGY2
public int get() { 3):7mE(
return queue[1]; I8?egDkk
} 6:QJ@j\
GY0<\-
public void remove() { r?H {Y3,
SortUtil.swap(queue,1,size--); 4?8GK
fixDown(1); A7ck-9dT/L
} 60QElJ9D
file://fixdown %#|S
private void fixDown(int k) { idz6m]{~yT
int j; BXm{x6\
while ((j = k << 1) <= size) { Be?mIwc_g
if (j < size %26amp;%26amp; queue[j] j++; ,P5HR+h
if (queue[k]>queue[j]) file://不用交换 yUBic~S
break; drF"kTD"7
SortUtil.swap(queue,j,k); \$9S_z
k = j; V8&%fxn+
} wwE9|'Ok
} /&vUi7'
private void fixUp(int k) { C$rZn%dp(
while (k > 1) { o$2fML
int j = k >> 1; BXLhi(.s
if (queue[j]>queue[k]) |nMbf
break; j^:\a\-1
SortUtil.swap(queue,j,k); RkC?(p
k = j; aiUn bP
} %K?~$;Z.
} cjH ~H8
ijC;"j/(
} OB5{EILej
M3u[E
} 0(0Ep(Vj
bQ_i&t\yzB
SortUtil： Fa@#nY|UV3
&a1agi7M
package org.rut.util.algorithm; A@&+!sO
+Hv%m8'0|
import org.rut.util.algorithm.support.BubbleSort; IzkZ^;(N
import org.rut.util.algorithm.support.HeapSort; awMm&8cIM
import org.rut.util.algorithm.support.ImprovedMergeSort; LvE|K&R|
import org.rut.util.algorithm.support.ImprovedQuickSort; )]rGGNF*
import org.rut.util.algorithm.support.InsertSort; 4dl?US[-
import org.rut.util.algorithm.support.MergeSort; J6\<>5A?
import org.rut.util.algorithm.support.QuickSort; B>-Iv_
import org.rut.util.algorithm.support.SelectionSort; } %rF}>$A
import org.rut.util.algorithm.support.ShellSort; 7Nx@eoZ
wgfn:LR
/** jhK&Z7;
* @author treeroot ^Fy) oWS
* @since 2006-2-2 Tf*X\{"
* @version 1.0 |+ @
*/ p5>TL!4M
public class SortUtil { mN*9X[>x
public final static int INSERT = 1; l{Xsh;%=
public final static int BUBBLE = 2; c]&(h L
public final static int SELECTION = 3; &ViIxJZ1$
public final static int SHELL = 4; V?%>Ex$
public final static int QUICK = 5; "RZ)pav?
public final static int IMPROVED_QUICK = 6; aU5t|S6
public final static int MERGE = 7; w QwY_ _
public final static int IMPROVED_MERGE = 8; N4'b]:`n
public final static int HEAP = 9; vy6NH5Q
>0B[
public static void sort(int[] data) { 5v!Uec'+
sort(data, IMPROVED_QUICK); KmpX^Se[
} NS<lmWx+
private static String[] name={ V/J[~mN9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \fh.D/@
}; G;wv.|\
vg *+>lbA
private static Sort[] impl=new Sort[]{ et/mfzV
new InsertSort(), CSwNsFDR%
new BubbleSort(), Hm%[d;Z7
new SelectionSort(), V<nh+Q3<d
new ShellSort(), Zna }h{
new QuickSort(), ?RrJYj1
new ImprovedQuickSort(), ?9 2+(s
new MergeSort(), Y~gpiL3u
new ImprovedMergeSort(), vAU^<$D27
new HeapSort() >TwOL
}; ~r&Q\G
"fS9Nx3
public static String toString(int algorithm){ _U/etlDTO
return name[algorithm-1]; Iu%/~FgPj{
} ApjLY58=
X!nI{PE
public static void sort(int[] data, int algorithm) { [Zi\L>PHO
impl[algorithm-1].sort(data); vqv(KsD+::
} *)g*5kKN
]!0 BMZmf
public static interface Sort { v;jrAND
public void sort(int[] data); u&r@@p.
} )QFT$rmX
;k(|ynXv
public static void swap(int[] data, int i, int j) { ~d){7OG
int temp = data; )Q~Q.
data = data[j]; GsE?<3
data[j] = temp; |LiFX5!\
} s^js}9]p
} 9]7+fu