[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; <Wf0QO,
} )JX$/- RD-
int i1=l; hr1$1&p
int i2=mid+1; .qinR6=
for(int cur=l;cur<=r;cur++){ 9A<0zt
if(i1==mid+1) mt^`1ekoY
data[cur]=temp[i2++]; \!4|tBKVY
else if(i2>r) ,-:a?#f>
data[cur]=temp[i1++]; GEfY^!F+
else if(temp[i1] data[cur]=temp[i1++]; u GIr&`S
else ol#yjrv
data[cur]=temp[i2++]; 4Pf+]R
} "ZqEP R)
} ZM 8U]0[X
BPiiexTV9
} E[*0Bo]
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改进后的归并排序: Dt|fDw$]D
19&)Yd1
package org.rut.util.algorithm.support; %yKKUZ~
vG3M5G
import org.rut.util.algorithm.SortUtil; ki4Xp'IK
uAT/6@
/** `x*/UCy\
* @author treeroot KcnjF^k
* @since 2006-2-2 94YA2_f;
* @version 1.0 o"4E+1qwM
*/ L}b'+Wi@
public class ImprovedMergeSort implements SortUtil.Sort { b?>VPuyBb
)r pD2H
private static final int THRESHOLD = 10; {s9<ej~<R
\H[Yyp4
/* d QDLI
* (non-Javadoc) >qn+iI2U
* ,@479ZvvR3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T,Fm"U6[(
*/ `OBl:e
public void sort(int[] data) { g+3Hwtl
int[] temp=new int[data.length]; |C4o zl=O?
mergeSort(data,temp,0,data.length-1); Fq4lXlSB
} [brkx3h
;da4\bppt
private void mergeSort(int[] data, int[] temp, int l, int r) { S!<"Swf:
int i, j, k; wO89&XZ<
int mid = (l + r) / 2; )tCx5 9
if (l == r) ,A?{~?u.
return; @x*.5:[
if ((mid - l) >= THRESHOLD) EFD?di)s
mergeSort(data, temp, l, mid); _}^u-fJ/~
else 3jS7 uU
insertSort(data, l, mid - l + 1); &rcdr+'
if ((r - mid) > THRESHOLD) s4N,^_j
mergeSort(data, temp, mid + 1, r); _trpXkQp
else "H@Fe
insertSort(data, mid + 1, r - mid); Eny!R@u7q
z:?:
for (i = l; i <= mid; i++) { {H'X)n$
temp = data; 5DUi4 Cbgy
} qNy-o\;XN
for (j = 1; j <= r - mid; j++) { 8,H~4Ce3
temp[r - j + 1] = data[j + mid]; w7r'SCVh3+
} 1Lc8fP$
int a = temp[l]; 0a@c/XGBp
int b = temp[r]; CxkMhd8qz
for (i = l, j = r, k = l; k <= r; k++) { nqrDT1b**
if (a < b) { T"IW Jpc
data[k] = temp[i++]; 88#N~j~P
a = temp; B9AbKK$`
} else { b70AJe=
data[k] = temp[j--]; vLr&ay!w
b = temp[j]; {x|MA(NO
} =8@RKG`>;
} qA04Vc[2
} ss*5.(y
y1nP F&_
/** _E&U?>g+
* @param data y&h~Oa?,;
* @param l VYHOk3
* @param i ZrA Um
*/ JOPTc]
private void insertSort(int[] data, int start, int len) { !#C)99L"F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o16d`}/<
} T:Bzz)2/
} :bI,rEW#_
} y>4p~
} 7WXiG0
=#jTo|~u4o
堆排序： t6j-?c('
` 4OMZMq
package org.rut.util.algorithm.support; p0
w{~" ;[@
import org.rut.util.algorithm.SortUtil; $vz_%Y
OW?uZ<z
/** 1]HHe*'Z
* @author treeroot Un]DFu
* @since 2006-2-2 6<#Slw[
* @version 1.0 LMt0'Ml9
*/ rYD']%2
public class HeapSort implements SortUtil.Sort{ 4a#B!xW
A(PE
/* (non-Javadoc) n&(3o6i'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \ =S3 L<
*/ `d.Gw+Un
public void sort(int[] data) { F|9a}(-7
MaxHeap h=new MaxHeap(); Ca$y819E2
h.init(data); t`h_+p%>
for(int i=0;i h.remove(); Hi$#!OU
System.arraycopy(h.queue,1,data,0,data.length); `Yg7,{A\J
} \MF3CK@/
JATS6-Lz`
private static class MaxHeap{ .V7Y2!4TE
<1TlW ~q<
void init(int[] data){ !,I7 ?O
this.queue=new int[data.length+1]; u<x[5xH+
for(int i=0;i queue[++size]=data; ex{)mE4Cd
fixUp(size); Fka1]|j9
} k>7gy?Y!K<
} KsZ@kTs
A{G5Plrh
private int size=0; Cm99?K
l# }As.o}
private int[] queue; :PHUsy
`^?}s-H+
public int get() { nZ"{y
return queue[1]; y?[5jL|Ue
} pM1=UF
od;Bb
public void remove() { d&O'r[S
SortUtil.swap(queue,1,size--); #($k 3OA
fixDown(1); +oE7~64LL
} -bv>iIC
file://fixdown Z83q-
private void fixDown(int k) { [c,|Lw4
int j; xhw8#
while ((j = k << 1) <= size) { cdd P T
if (j < size %26amp;%26amp; queue[j] j++; 38Bnf
if (queue[k]>queue[j]) file://不用交换 d4b 9rtM
break; #9URVq,
SortUtil.swap(queue,j,k); v(i1Z}*b
k = j; MtMvpHk
} xC= y^- 1
} Np|:dP9#}
private void fixUp(int k) { le "JW/BD
while (k > 1) { &*Q|d*CP
int j = k >> 1; rhlW
if (queue[j]>queue[k]) 8<wtf]x
break; {JCSR2BB
SortUtil.swap(queue,j,k); v!WU |=u
k = j; QC$=Fs5+
} QCZ,K"y
} U>e3_td3,
6n2Vx1b
} _C7abw-
n's2/9x
} (OM?aW
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SortUtil： Y&ct+w]%
<~IH`
package org.rut.util.algorithm; 0X] ekq
T4%i`<i
import org.rut.util.algorithm.support.BubbleSort; WZ-4^WM=!
import org.rut.util.algorithm.support.HeapSort; eO|^Lu]+
import org.rut.util.algorithm.support.ImprovedMergeSort; wgSR*d>y*9
import org.rut.util.algorithm.support.ImprovedQuickSort; clPZd
import org.rut.util.algorithm.support.InsertSort; ]be0I)
import org.rut.util.algorithm.support.MergeSort; gJ)h9e*m^
import org.rut.util.algorithm.support.QuickSort; 'sT}DX(7M
import org.rut.util.algorithm.support.SelectionSort; \NvC
import org.rut.util.algorithm.support.ShellSort; [%gK^Zt
3Hb .ZLE#
/** pIU#c&%<9
* @author treeroot Zztt)/6*
* @since 2006-2-2 pq/FLYiv
* @version 1.0 Thht_3_C,f
*/ v*C+U$_3\1
public class SortUtil { y]~+`9
public final static int INSERT = 1; |!jYv'%
public final static int BUBBLE = 2; HJ2]Nz:
public final static int SELECTION = 3; 'O\d<F.c$2
public final static int SHELL = 4; H{Y5YTg]
public final static int QUICK = 5; O+{pF.P#V
public final static int IMPROVED_QUICK = 6; o{S}e!Vb
public final static int MERGE = 7; W<cW;mO
public final static int IMPROVED_MERGE = 8; tk3<sr"IQ
public final static int HEAP = 9; ne!j%9Ar
7gZVg@
public static void sort(int[] data) { {kRDegby
sort(data, IMPROVED_QUICK); Skr\a\ J
} MA/"UV&M(
private static String[] name={ VOowA^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !}Woo$#ND
}; Cn6n4, 0
rw=UK`
private static Sort[] impl=new Sort[]{ 110>p
new InsertSort(), ~vjr;a(B
new BubbleSort(), .yFg$|yG
new SelectionSort(), Y*5@|Q
new ShellSort(), 5CRc]Q#@
new QuickSort(), &2<&X( )
new ImprovedQuickSort(), }Uqa8&
new MergeSort(), N%n1>!X)!
new ImprovedMergeSort(), PJSDY1T
new HeapSort() QYf/tQg$
}; &4[#_(pk
~Uwr689N
public static String toString(int algorithm){ rlUdAa3
return name[algorithm-1]; K[Egwk7
} buCm @@o
"Dmw-
public static void sort(int[] data, int algorithm) { vP87{J*DE1
impl[algorithm-1].sort(data); 0^)8*O9$
} E{+c*sz
98b9%Z'2f
public static interface Sort { H8o%H=I%
public void sort(int[] data); 8 /RfNGY
} E |GK3/
1K*f4BnDr~
public static void swap(int[] data, int i, int j) { fn?6%q,!ls
int temp = data; CwEWW\Bu
data = data[j]; w ;s ]n
data[j] = temp; +qSr=Y:+
} ~Hyyq-
} Ck/_UY|