[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; bm*.*A]
} |oWl9j]Z
int i1=l; l4gF.-.GYF
int i2=mid+1; GE8.{P
for(int cur=l;cur<=r;cur++){ "ejsz&n
if(i1==mid+1) jY2mn".N
data[cur]=temp[i2++]; f, '*f:(
else if(i2>r) Z2U6<4?1%
data[cur]=temp[i1++]; "{S6iH)]8
else if(temp[i1] data[cur]=temp[i1++]; y>#_LhTX-
else x?UAj8z6
data[cur]=temp[i2++]; ?f$U8A4lp
} fikDpR
} ~<.{z]*O
d5>EvK U
} ih|;H:"^
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改进后的归并排序: QuP)j1"X
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package org.rut.util.algorithm.support; NEUr w/
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import org.rut.util.algorithm.SortUtil; !4a#);`G
h<Ct[46,S
/** Q:j~ kutS|
* @author treeroot V|hwT^h
* @since 2006-2-2 $dxA7 `L
* @version 1.0 (q0vql
*/ ^AShy`o^X
public class ImprovedMergeSort implements SortUtil.Sort { QE8`nMf
*8J0yv
private static final int THRESHOLD = 10; }= wor~
F [Lg,}
/* !7f,gvk
* (non-Javadoc) a)4%sX*I
* `M*jrkM]x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z9:yt5ar
*/ 0K6My4d{
public void sort(int[] data) { Q_Br{ `c
int[] temp=new int[data.length]; E]v]fy"
mergeSort(data,temp,0,data.length-1); #1C]ZV] B
} 734t
}VRl L>HAC
private void mergeSort(int[] data, int[] temp, int l, int r) { +?W4ac1
int i, j, k; q`'"+`h
int mid = (l + r) / 2; n!.=05OtX
if (l == r) Y]*&\Ex"\
return; d``wx}#Uk
if ((mid - l) >= THRESHOLD) 7x=4P|(\}
mergeSort(data, temp, l, mid); *Ojl@N
else aNs8T`
insertSort(data, l, mid - l + 1); s_}6#;
if ((r - mid) > THRESHOLD) +I-BqA9
mergeSort(data, temp, mid + 1, r); BzzZ.AH~
else MRw4?HqB
insertSort(data, mid + 1, r - mid); L,.AY?)+7
w[D]\>QHa
for (i = l; i <= mid; i++) { `|Hk+V
temp = data; jV9oTH-
} kMK0|+
for (j = 1; j <= r - mid; j++) { liG|#ny{
temp[r - j + 1] = data[j + mid]; *Wvk~
} :8j7}'
int a = temp[l]; Xtfs)"
int b = temp[r]; PqL.^
for (i = l, j = r, k = l; k <= r; k++) { 4;W{#jk
if (a < b) { <5mv8'{L
data[k] = temp[i++]; %LzARTX
a = temp; A)4XQF
} else { -ycdg'v
data[k] = temp[j--]; #qmsZHd}b
b = temp[j]; Ll-QhcC$
} JBLUX,
} rjiHP;-t1
} ^H7xFd|>
'<YBoU{e*
/** iF Mf[qBg
* @param data ."=p\:^j*
* @param l N6of$p'N
* @param i $.kJBRgV*
*/ ;@Fb>lBhX
private void insertSort(int[] data, int start, int len) { *!JB^5(H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0^dYu/i5
} QK#wsw
} H8[A*uYL
} (xN1?qXB.
} [`qdpzUp&
DpvHIE:W
堆排序： ZAU#^bEQB
rD4umWi
package org.rut.util.algorithm.support; }mK,Bi?bj
TEY~E*=}$
import org.rut.util.algorithm.SortUtil; !&hqj$>-}
kyvl>I0q@
/** r~h#
* @author treeroot pc0{
* @since 2006-2-2 >(ip-R
* @version 1.0 ,!@MLn
*/ =#[oi3k
public class HeapSort implements SortUtil.Sort{ 0"%dPKi
Ikf[K%NKn
/* (non-Javadoc) (g/A uL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }.E^_`
*/ :&TM0O
public void sort(int[] data) { AQ@)'
MaxHeap h=new MaxHeap(); 9QLG:(~;
h.init(data); cPuXye
for(int i=0;i h.remove(); 1u7D:h>#
System.arraycopy(h.queue,1,data,0,data.length); T9w=k)
} 6(d6Uwc`
K_YOp1
private static class MaxHeap{ :,aY|2si
$8UW^#Bpq
void init(int[] data){ Vi-Ph;6[
this.queue=new int[data.length+1]; ;z.niX.fx
for(int i=0;i queue[++size]=data; *0^~@U
fixUp(size); {FI*oO1A~
} gAdqZJR%]
} 4xmJQ>/
`sT;\
private int size=0; > B@c74
jL^@;"/XhC
private int[] queue; dGBjV #bNT
,7Hyrx`
public int get() { 4BCe;Q^6
return queue[1]; k Alxm{
} 2vjkThh`I
Ge-Bk)6
public void remove() { 'Tjvq%ks
SortUtil.swap(queue,1,size--); mXp#6'a
fixDown(1); +|obU9M
} d7vPZ_j^z
file://fixdown EwN{|34C
private void fixDown(int k) { yj&GJuNb~
int j; 2@6@|jRG
while ((j = k << 1) <= size) { gPMfn:a-8
if (j < size %26amp;%26amp; queue[j] j++; #\lvzMjCC
if (queue[k]>queue[j]) file://不用交换 ?QT6q]|d0+
break; %T]^,y$n
SortUtil.swap(queue,j,k); F&czD;F
k = j; ?<!qF:r:
} ]A=\P,D
} r3g^0|)
private void fixUp(int k) { ]E<Z5G1HD
while (k > 1) { /o;L,mcx*
int j = k >> 1; JpfA+r
if (queue[j]>queue[k]) hXjZ>n``
break; ~k?rP}>0
SortUtil.swap(queue,j,k); JK =A=
k = j; xyGwYv>*KO
} V'XEz;Ze
} B&a{,.m&q6
?`U_|Yo
} f $Agcy
_f%s]
} O0#[hY,
5Z!$?J4Rl
SortUtil： ^}-l["u`
FQ<x(&/NF
package org.rut.util.algorithm; Jj \nye+
\ =hg^j
import org.rut.util.algorithm.support.BubbleSort; eA!Z7 '
import org.rut.util.algorithm.support.HeapSort; N# }w1]
import org.rut.util.algorithm.support.ImprovedMergeSort; 03fOm
import org.rut.util.algorithm.support.ImprovedQuickSort; ?l9sj]^w
import org.rut.util.algorithm.support.InsertSort; SF:98#pg
import org.rut.util.algorithm.support.MergeSort; })-V,\
import org.rut.util.algorithm.support.QuickSort; d*^JO4'
import org.rut.util.algorithm.support.SelectionSort; JU>~[yAP
import org.rut.util.algorithm.support.ShellSort; Pw<?Dw]m
$#hU_vr
/** J -z.
* @author treeroot d%P2V>P
* @since 2006-2-2 ,/+Mp
* @version 1.0 qB$-H' j:;
*/ s9wzN6re
public class SortUtil { M +OVqTsFU
public final static int INSERT = 1; 1yE',9?
public final static int BUBBLE = 2; K]m#~J3d>
public final static int SELECTION = 3; ` 7iA?;
public final static int SHELL = 4; &s`)_P[
public final static int QUICK = 5; A5Jadz~
public final static int IMPROVED_QUICK = 6; v"1&xe^4
public final static int MERGE = 7; kc2B_+Y1
public final static int IMPROVED_MERGE = 8; -KGJr
public final static int HEAP = 9; 7I[[S!((s
N9/k`ZGC
public static void sort(int[] data) { mx}5":}
sort(data, IMPROVED_QUICK); $JOz7j(
} "Y+VNS
private static String[] name={ O<s7VHj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _|C3\x1c
}; Hj >fg2/
T/|!^qLF
private static Sort[] impl=new Sort[]{ (>0`e8v!
new InsertSort(), U=D;CjAh
new BubbleSort(), Zl3l=x h
new SelectionSort(), Gk5'|s
new ShellSort(), w~B1TfqNo
new QuickSort(), m%J?5rR3
new ImprovedQuickSort(), \*CXXp`
new MergeSort(), ??nT[bhQ
new ImprovedMergeSort(), ZiR}S
new HeapSort() `S((F|Ty=;
}; $CB&>?~
TE&E f$h
public static String toString(int algorithm){ 6g-jhsW6
return name[algorithm-1]; i}LQ}35@
} M %zf?>])
Ut~YvWc9
public static void sort(int[] data, int algorithm) { ]rGd!"q
impl[algorithm-1].sort(data); LeN }Q
} ;,U@zB;\%(
g[i;>XyP
public static interface Sort { EUw4$Jt^p
public void sort(int[] data); 3SWDPy
} 1N _"Mm{
!"phz&E5ah
public static void swap(int[] data, int i, int j) { 4Ty?>'*|
int temp = data; xy>$^/[$
data = data[j]; 51s\)d%l
data[j] = temp; rs4:jS$)
} >%6j-:S
} # d"M(nt