[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; h7Uj "qH
} iy~h|YK;
int i1=l; sK#)k\w>
int i2=mid+1; Zu"qTJE/1
for(int cur=l;cur<=r;cur++){ xKu#OH
if(i1==mid+1) Rw'}>?k]
data[cur]=temp[i2++]; WaB0?jI
else if(i2>r) 6xDk3
data[cur]=temp[i1++]; 336ETrG^0
else if(temp[i1] data[cur]=temp[i1++]; ,=+t2Bn
else ]$2 yV&V&
data[cur]=temp[i2++]; mh8fJ6j29N
} D?dBm
} !yv>e7g^
K<^p~'f4P
} a]p9[Nk
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改进后的归并排序: o}Grb/LJ
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package org.rut.util.algorithm.support; K9zr]7;th
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import org.rut.util.algorithm.SortUtil; JtO}i{A
|tAkv
/** s4|tWfZ
* @author treeroot y#a,d||N1
* @since 2006-2-2 2-@)'6"n
* @version 1.0 [yMSCCswW
*/ ))AxU!*.
public class ImprovedMergeSort implements SortUtil.Sort { *OA(v^@tx7
HrE,K\^
private static final int THRESHOLD = 10; BI%^7\HZ
ou-#+Sdd
/* z]9t 5I
* (non-Javadoc) VEy]vr}
* QqQhQGV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -F?97&G$
*/ /W.s1N
public void sort(int[] data) { sl-wNIQ
int[] temp=new int[data.length]; =Fc]mcJ69
mergeSort(data,temp,0,data.length-1); f+9WGNpw
} I8! .n
5Xr})%L
private void mergeSort(int[] data, int[] temp, int l, int r) { j1`<+YT<#
int i, j, k; ~qZ6I)?
int mid = (l + r) / 2; G2N0'R"
if (l == r) {d<XDx4`
return; v' t'{g%
if ((mid - l) >= THRESHOLD) D SX%SE)
mergeSort(data, temp, l, mid); 3UXZ|!-
else Z-lhJ<0/Pa
insertSort(data, l, mid - l + 1); 1qR$ Yr\
if ((r - mid) > THRESHOLD) Y:/p0o
mergeSort(data, temp, mid + 1, r); &OJ?Za@p@)
else d-b<_k{p
insertSort(data, mid + 1, r - mid); M@KQOAzt
]2l}[ w71|
for (i = l; i <= mid; i++) { {J)%6eL?
temp = data; s<LnUF1b
} 7 q!==P=
for (j = 1; j <= r - mid; j++) { R`]@.i4tt
temp[r - j + 1] = data[j + mid]; Ej)7[
} TO]7cC
int a = temp[l]; OLIMgc(W
int b = temp[r]; ~]?sA{
for (i = l, j = r, k = l; k <= r; k++) { }'tJc $!
if (a < b) { E[#VWM I
data[k] = temp[i++]; @p~scE.#\
a = temp; #lMcAYH,
} else { vE,^K6q0`
data[k] = temp[j--]; Q>Klkd5(
b = temp[j]; tl /i
} QxG^oxU}
} eI"pRH*f
} S'^ q
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/** =PY{Elf
* @param data d:|x e:
* @param l m5 sW68
* @param i ECA<%'$?E
*/ 5qH*"i+|s
private void insertSort(int[] data, int start, int len) { w>cqsTq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;<m*ASM.3
} W/\VpD) ?;
} 'fl.&"/r
} k L6s49
} BFw_T3}zn
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堆排序： C{m%]jKH
?2#'>B
package org.rut.util.algorithm.support; XQn1B3k+
J;Z2<x/H
import org.rut.util.algorithm.SortUtil; ^?H|RAp
5b/ ~]v
/** :,JjN&
* @author treeroot 4@{?4k-cq
* @since 2006-2-2 Q;VuoHj!
* @version 1.0 1|4,jm$
*/ q 0F6MAXj
public class HeapSort implements SortUtil.Sort{ P~{8L.w!>W
-_Z4)"k
/* (non-Javadoc) |?VJf3A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8u~
*/ In_"iEo,
public void sort(int[] data) { T4wk$R L
MaxHeap h=new MaxHeap(); ':;k<(<-
h.init(data); ^K"BQ~-w
for(int i=0;i h.remove(); bD,X.
System.arraycopy(h.queue,1,data,0,data.length); 0c`zg7|
} Bz_'>6w
p" >*WQ
private static class MaxHeap{ 0)Ephsw
{>1FZsR49t
void init(int[] data){ r~)fAb?
this.queue=new int[data.length+1]; ?nW>'z
for(int i=0;i queue[++size]=data; j~{cT/5Y_
fixUp(size); ?MRY*[$
} 0pMN@Cz6
} -:ucp2
`5@F'tKQ
private int size=0; !-7n69:G
dW4jkjap
private int[] queue; =|P &G~]
#gV n7wq
public int get() { eo9/
return queue[1]; (|^m9v0:
} HGGq;Nbm
;`#R9\C=h
public void remove() { /dYv@OU?
SortUtil.swap(queue,1,size--); nU_O|l9
fixDown(1); W\kli';jyC
} |2q3spd
file://fixdown \Vf:/9^
private void fixDown(int k) { 1'<C-[1
int j; qazA,|L!
while ((j = k << 1) <= size) { N;|^C{uz
if (j < size %26amp;%26amp; queue[j] j++; Lg7A[\c ~
if (queue[k]>queue[j]) file://不用交换 en< $.aY
break; 3^y(@XFt
SortUtil.swap(queue,j,k); )JS6W
k = j; XH!#_jy
} lDYgtUKG
} W r/-{Wt
private void fixUp(int k) { SL4?E<Jb
while (k > 1) { d<a|dwAeh
int j = k >> 1; ,Z"<-%3
if (queue[j]>queue[k]) B'}?cG]
break; 0\%g@j-aD
SortUtil.swap(queue,j,k); |ri)-Bk ,
k = j; [%.v;+L
} OT{"C"%5t
} D!&(#Vl _
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} =5+*TL`
OldOc5D
} fM;,9
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SortUtil： Op'a=4x]
nYyhQX~]B
package org.rut.util.algorithm; W'[V$*
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import org.rut.util.algorithm.support.BubbleSort; ]Ox5F@
import org.rut.util.algorithm.support.HeapSort; eTuqK23
import org.rut.util.algorithm.support.ImprovedMergeSort; s*izhjjX
import org.rut.util.algorithm.support.ImprovedQuickSort; ukWn@q*
import org.rut.util.algorithm.support.InsertSort; &3Zq1o
import org.rut.util.algorithm.support.MergeSort; u7!9H<{>P
import org.rut.util.algorithm.support.QuickSort; Gnkar[oa&
import org.rut.util.algorithm.support.SelectionSort; THYw_]K
import org.rut.util.algorithm.support.ShellSort; <g[z jV9p
Z?axrGmg0
/** vi,hWz8WB
* @author treeroot @Wu-&Lb
* @since 2006-2-2 d?2V2`6
* @version 1.0 -pu5O9 @
*/ HK@ij,px
public class SortUtil { "j^i6RS
public final static int INSERT = 1; DP ? dC`
public final static int BUBBLE = 2; EApKN@<"
public final static int SELECTION = 3; O `}EiyV
public final static int SHELL = 4; ^#/FkEt7bp
public final static int QUICK = 5; r"7n2
public final static int IMPROVED_QUICK = 6; .G0 N+)
public final static int MERGE = 7; /)P}[Q4
public final static int IMPROVED_MERGE = 8; ^jdU4
public final static int HEAP = 9; / ;]5X
F!omkN
public static void sort(int[] data) { ym%UuC3^w
sort(data, IMPROVED_QUICK); 8Lo#{`
} *r7vDc
private static String[] name={ oaoTd$/5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Tg\bpLk0=
}; m~=~DMj
'Uok<;
private static Sort[] impl=new Sort[]{ {MUB4-@?F$
new InsertSort(), 7u):J
new BubbleSort(), n<I{x^!
new SelectionSort(), [ERZ".?
new ShellSort(), D&@]
new QuickSort(), WyL+HB}
new ImprovedQuickSort(), JAPr[O&
new MergeSort(), {z#2gc'Q
new ImprovedMergeSort(), u;#]eUk9}
new HeapSort() ^J!q>KJs
}; {T){!UVp!
GD W@/oQr
public static String toString(int algorithm){ Ui{%q@
return name[algorithm-1]; 6@S6E(^
} Gr"CHz/
8[^'PIz
public static void sort(int[] data, int algorithm) { N.F5)04
impl[algorithm-1].sort(data); y_]+;%w:
} W U(_N*a
FR&`R
public static interface Sort { VFHd2Ea(
public void sort(int[] data); YO6BzS/~
} ]I*c:(qwu
9>""xt
public static void swap(int[] data, int i, int j) { Hvl n>x@
int temp = data; +n3I\7G>
data = data[j]; wb-yAQ8
data[j] = temp; q}1ZuK`6
} &4#Zi.]
} ab0Sx