[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; cN7z(I0[
} c@-K
int i1=l; A+*oT(`
int i2=mid+1; o#P3lz
for(int cur=l;cur<=r;cur++){ 'd^gRH<z
if(i1==mid+1) NNwd;AC
data[cur]=temp[i2++]; hIQ[:f
else if(i2>r) '$XHRS/q]
data[cur]=temp[i1++]; cXcx_-
else if(temp[i1] data[cur]=temp[i1++]; p@Y$eZ:O
else 1?RCJ]e5
data[cur]=temp[i2++]; [4Faq3T"
} CQHp4_
} iM|"H..
0BB@E(*
} $xtE+EV.p
mBZDl4 '
改进后的归并排序: -;)SER3Wq4
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package org.rut.util.algorithm.support; kbYg4t]FH
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import org.rut.util.algorithm.SortUtil; /QXs-T}d
; G59}d p~
/** QHzX 5$IM
* @author treeroot gZ"{{#:}
* @since 2006-2-2 B~;LBgpp
* @version 1.0 e#6&uFce
*/ vvsNWA
public class ImprovedMergeSort implements SortUtil.Sort { R;E"Qdt
=3sldKL&F
private static final int THRESHOLD = 10; 0"^oTmQN
_%Jl&0%q
/* *[xNp[4EU
* (non-Javadoc) J7?)$,ij%
* "T a9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A-7wkZ.H
*/ c_G-R+
public void sort(int[] data) { KBr5bcm4u
int[] temp=new int[data.length]; /y](mu"!
mergeSort(data,temp,0,data.length-1); LD~Jbq
} QFNz9c
}&(E#*>x
private void mergeSort(int[] data, int[] temp, int l, int r) { QBfhyo_
int i, j, k; nrS[7~
int mid = (l + r) / 2; (]}x[F9l
if (l == r) u_4:#~b
return; -[f"r`
if ((mid - l) >= THRESHOLD) FU5LYXCs
mergeSort(data, temp, l, mid); \2R`q*a+
else miG;]-"^
insertSort(data, l, mid - l + 1); z^P* :
if ((r - mid) > THRESHOLD) vNC$f(cQ
mergeSort(data, temp, mid + 1, r); yp[<9%Fi
else d^Zo35X
insertSort(data, mid + 1, r - mid); k+WO &g*|
C`NBHRa>
for (i = l; i <= mid; i++) { 0+K`pS'
temp = data; >J^7}J
} bl" (<TM
for (j = 1; j <= r - mid; j++) { +p9LE4g7Q
temp[r - j + 1] = data[j + mid]; ;}n9yci#
} <}28=d
int a = temp[l]; Gg=aK~q6
int b = temp[r]; ?qf:_G
for (i = l, j = r, k = l; k <= r; k++) { }[>RxHd
if (a < b) { VM-qVd-
data[k] = temp[i++]; i"%JFj_G
a = temp; Qb!!J4|!
} else { 5T$}Oy1
data[k] = temp[j--]; 6CcB-@n4
b = temp[j]; Y|%anTP
} qZ8|B
} r/mA2
} Ne &Xf
]regi- LGU
/** =oo[ Eyr
* @param data x r-;,W
* @param l ZB~l2
* @param i 5z1\#" B[
*/ opm?':Qst
private void insertSort(int[] data, int start, int len) { 9U#\nXM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t2=a(N-/,
} J"%8:pL
} TA Ftcs:
} F;IP3tD
} J+{Ou rWt
M:R8<.{
堆排序： 8h*t55
Z7JKaP9{:
package org.rut.util.algorithm.support; Gx.P]O3
xU@1!%l@
import org.rut.util.algorithm.SortUtil; gzVtxDh
*,"jF!C&[
/** F(d:t!
* @author treeroot mfZ)^X
* @since 2006-2-2 HwB {8S?sm
* @version 1.0 {bT9VZ>
*/ <v]z6B@9!
public class HeapSort implements SortUtil.Sort{ py]KTRzy
W0Ktw6
/* (non-Javadoc) -M6L.gi)oJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }x]&L/
*/ VLiIO"u;
public void sort(int[] data) { \,2gTi,=
MaxHeap h=new MaxHeap(); '0]r<O
h.init(data); QS^~77q
for(int i=0;i h.remove(); /dLA`=rZx
System.arraycopy(h.queue,1,data,0,data.length); E(_KN[}S
} RL6Vkd?
@|BD|{k
private static class MaxHeap{ PkTfJQP8
cA<<&C
void init(int[] data){ wtSvJI~o)
this.queue=new int[data.length+1]; {&-#s#&
for(int i=0;i queue[++size]=data; qYK4)JP
fixUp(size); "qawq0P8Z
} w#&z]O9r
} R"Kz!NTB
'99@=3AB:`
private int size=0; J_PH7Z*=,
oCVku:.
private int[] queue; :N2E}hxk
jJia.#.Ze
public int get() { Q/py qe G
return queue[1]; \]8VwsP
} pA.._8(t
-(9O6)Rs$
public void remove() { v5T`K=qC
SortUtil.swap(queue,1,size--); Q.A \U>AgV
fixDown(1); qBYg[K>
} Iyyo3awc
file://fixdown h=6xZuA\
private void fixDown(int k) { &tj0M.-
int j; ,hWcytzEw
while ((j = k << 1) <= size) { 2 z7}+lH
if (j < size %26amp;%26amp; queue[j] j++; t`YWwI.
if (queue[k]>queue[j]) file://不用交换 E]1##6Ae
break; NEVp8)w
SortUtil.swap(queue,j,k); 3+(z_!Qh
k = j; $7NCb7%/L
} ;7Okyj6EP
} ,q#2:b<E
private void fixUp(int k) { ^=+e?F`:{
while (k > 1) { CZ(`|;BC*
int j = k >> 1; l5k?De_(x
if (queue[j]>queue[k]) 9x?'}
break; xE1'&!4O
SortUtil.swap(queue,j,k); n@ [
k = j; ((<`zx
} ~.oj.[}
} ',)7GY/n~
Ur!~<4GO
} H0>yi[2f
P:k+ y$
} 8(lR!!=q
S6sq#kcH
SortUtil： n]yEdL/1
$1Z6\G O
package org.rut.util.algorithm; cyQBqG
UyiJU~r1
import org.rut.util.algorithm.support.BubbleSort; 0.Vi97`
import org.rut.util.algorithm.support.HeapSort; |=K_F3aJ
import org.rut.util.algorithm.support.ImprovedMergeSort; #;Tz[0
import org.rut.util.algorithm.support.ImprovedQuickSort; uMmXs%9T
import org.rut.util.algorithm.support.InsertSort; 57Z-
import org.rut.util.algorithm.support.MergeSort; L/Vx~r`P
import org.rut.util.algorithm.support.QuickSort; Zu/<NC (
import org.rut.util.algorithm.support.SelectionSort; $,27pkwHeW
import org.rut.util.algorithm.support.ShellSort; s_Wyh !@M
L0NA*C
/** "G?Yrh
* @author treeroot }dYBces
* @since 2006-2-2 }}r> K}
* @version 1.0 igC_)C^i>
*/ ,S&z<S_
public class SortUtil { 6.c^u5;
public final static int INSERT = 1; >:1P/U
public final static int BUBBLE = 2; dl~|Izm
public final static int SELECTION = 3; Log|%P\
public final static int SHELL = 4; n<7q`tM#
public final static int QUICK = 5; j/!H$0PN
public final static int IMPROVED_QUICK = 6; @n+=vC.xO
public final static int MERGE = 7; 'T8W!&$
public final static int IMPROVED_MERGE = 8; pv,45z0
public final static int HEAP = 9; +.yT/y"
rS8 w\`_
public static void sort(int[] data) { I5ZqBB
sort(data, IMPROVED_QUICK); 9KuD(EJS
} #0Ds'pE-
private static String[] name={ jN*:QI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8|^CK|m6*
}; YN/}9.
&qM[g9
private static Sort[] impl=new Sort[]{ +0l`5."d
new InsertSort(), 2f~($}+*
new BubbleSort(), *m+BuGt|
new SelectionSort(), p9eRZVy/
new ShellSort(), G&f8n
new QuickSort(), yV_wDeAz
new ImprovedQuickSort(), LW)H"6v
new MergeSort(), {Qu"%h.Al
new ImprovedMergeSort(), ;q>9W,jy
new HeapSort() gb|Q%LS9R
}; WYcA8X/
Q>< 0[EPj3
public static String toString(int algorithm){ *iA4:EIP
return name[algorithm-1]; LPd\-S_rsP
} r=.A'"Kf
b\7iY&.C|
public static void sort(int[] data, int algorithm) { _i0kc,*C\
impl[algorithm-1].sort(data); X;F8_+Np
} e.d #wyeX
Q n)d2-<
public static interface Sort { R\3VB NX.g
public void sort(int[] data); 5Qwh(C^H
} aW_oD[l
QF2q^[>w6
public static void swap(int[] data, int i, int j) { & WOiik
int temp = data; {V19Zv"j
data = data[j]; [(kB 5 a
data[j] = temp; `O?T.p)
} oTjyN\?H
} Z6C=T;w