[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; hEo$Jz`
} ?r)>SB3(e
int i1=l; qh}+b^Wi
int i2=mid+1; >2K'!@~'
for(int cur=l;cur<=r;cur++){ ^j.3'}p
if(i1==mid+1) tr0kTW$Ad
data[cur]=temp[i2++]; L?a4>uVY
else if(i2>r) ZBU<L+#
data[cur]=temp[i1++]; t6e6v=.Pg
else if(temp[i1] data[cur]=temp[i1++]; c"CR_
else G]xN#O;
data[cur]=temp[i2++]; cRag0.[
} &q-P O
} OiC|~8
w0yzC0yBk
} ]{|l4e4P
_E0yzkS
改进后的归并排序: wD6QN
iSX:H;
package org.rut.util.algorithm.support; K",Xe>
b/T k$&
import org.rut.util.algorithm.SortUtil; WT,dTn;W
.}!.: |
/** ?a,`{1m0\
* @author treeroot qgWsf-di=
* @since 2006-2-2 P?8$VAkj
* @version 1.0 3WGOftLzt
*/ 9zBt a
public class ImprovedMergeSort implements SortUtil.Sort { vgNrHq&2q
%[L/JJbP&Z
private static final int THRESHOLD = 10; S?'L%%Vo
4/SltWU
/* t >64^nS
* (non-Javadoc) _-v$fDrz
* WwKpZ67$R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `X&d:!}F
*/ KeyHxU=?
public void sort(int[] data) { G%jV}7h
int[] temp=new int[data.length]; &=Y%4vq
mergeSort(data,temp,0,data.length-1); :.-KM7tDI1
} - ikq#L){
:de4Fje/4y
private void mergeSort(int[] data, int[] temp, int l, int r) { B.b sU
int i, j, k; c~\^C_
int mid = (l + r) / 2; [>Zg6q|
if (l == r) $['`H)z
return; %N7G>_+
if ((mid - l) >= THRESHOLD) ady SwB
mergeSort(data, temp, l, mid); &MrG ,/
else Z#;\Rb.x7
insertSort(data, l, mid - l + 1); tM:$H6m/(
if ((r - mid) > THRESHOLD) p .~5k
mergeSort(data, temp, mid + 1, r); 7{rRQ~s&g9
else "zIQ(|TL?d
insertSort(data, mid + 1, r - mid); \w$e|[~
jfa<32`0E
for (i = l; i <= mid; i++) { q}"HxMJ
temp = data; [#:yOZt
} TPZ^hL>ao
for (j = 1; j <= r - mid; j++) { Yka>r9wr
temp[r - j + 1] = data[j + mid]; .+ic6
} b%j4W)Z
int a = temp[l]; dTU`@!f
int b = temp[r]; BJZGQrsz
for (i = l, j = r, k = l; k <= r; k++) { /w*HxtwFmD
if (a < b) { /'>ck2drjk
data[k] = temp[i++]; URyY^+s
a = temp; HhTD/
} else { *+ O
data[k] = temp[j--]; #t">tL
b = temp[j]; Xu{S4#1
} Xpmi(~n
} H]0(GLvH
} Y;sN UX
"Z a}p|Ct
/** f[$Z<:D-ve
* @param data {1vlz>82
* @param l 73E[O5?b
* @param i SYv5{bff =
*/ vqwSOh|P9
private void insertSort(int[] data, int start, int len) { $0;Dk,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wpJfP_H
} kQtnT7
} s|Zv>Qt
} g6q67m<h
} &PEw8: TX
|w`Q$ c
堆排序： ,09d"7`X
r1xhplHH@
package org.rut.util.algorithm.support; izP>w*/nO
+dK;\wT
import org.rut.util.algorithm.SortUtil; 2-u9%
-(![xZ1{K
/** :]IYw!_-p
* @author treeroot z_ia3k<
* @since 2006-2-2 gA DF
* @version 1.0 ^$F1U,oi
*/ Z|$OPMLX
public class HeapSort implements SortUtil.Sort{ JXF@b-c
;PX>] r5U0
/* (non-Javadoc) ]s:%joj%^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1mz72K
*/ Fop'm))C8
public void sort(int[] data) { Z"'tJ3Y.~
MaxHeap h=new MaxHeap(); $"x~p1P
h.init(data); [>U =P`
for(int i=0;i h.remove(); si3@R?WR6*
System.arraycopy(h.queue,1,data,0,data.length); ir3EA'_>N
} =LMM]'no,
kG$U
private static class MaxHeap{ $/;;}|hqi
"iTi+UZxe
void init(int[] data){ $|bdeQPr\
this.queue=new int[data.length+1]; +OC~y:
for(int i=0;i queue[++size]=data; |4|j5<5
fixUp(size); vmK`QPu2
} l|&DI]gw
} =F"vL
O4A{GO^q
private int size=0; jz72~+)T
OtFGo8
private int[] queue; zsuXN*
xC+TO
public int get() { Sn!5/9Y
return queue[1]; 8[xl3=
} <mX EX`?
?."YP[;
public void remove() { zyi;vu
SortUtil.swap(queue,1,size--); bL]NSD
fixDown(1); Vmf!0-
} X{G&r$
file://fixdown d| OEZx
private void fixDown(int k) { ];8S<KiS~
int j; <P1yA>=3`
while ((j = k << 1) <= size) { x|lX1Mh$
if (j < size %26amp;%26amp; queue[j] j++; o{?Rz3z
if (queue[k]>queue[j]) file://不用交换 S{#L7S
break; pDV8B/{
SortUtil.swap(queue,j,k); FEwPLViso
k = j; {IA3`y~
} >#~>!cv6D
} *\PCMl
private void fixUp(int k) { <Po$|$_~
while (k > 1) { -#<AbT
int j = k >> 1; #4BwYj(Sl
if (queue[j]>queue[k]) h"$)[k~
break; b:t|9FE%
SortUtil.swap(queue,j,k); I)wc&>Lc
k = j; oo2CF!Xy
} $~5ax8u&!#
} U~1)a(Yu;
&ku.Q3xGs
} R;3nL[{U
}NpN<C+
} ?8]g&V
13K|=6si
SortUtil： 5/YGu=,
+LwwI*;b
package org.rut.util.algorithm; _{&bmE
L~|_CRw
import org.rut.util.algorithm.support.BubbleSort; ( we)0AxF'
import org.rut.util.algorithm.support.HeapSort; ;fe~PPT
import org.rut.util.algorithm.support.ImprovedMergeSort; JpE7"Z"~MS
import org.rut.util.algorithm.support.ImprovedQuickSort; hAU@}"=G
import org.rut.util.algorithm.support.InsertSort; 34<k)0sO
import org.rut.util.algorithm.support.MergeSort; #sM`>KG6T1
import org.rut.util.algorithm.support.QuickSort; /?Hq
import org.rut.util.algorithm.support.SelectionSort; {L/hhKT
import org.rut.util.algorithm.support.ShellSort; F_-}GN%
^2C \--=;
/** yIYQ.-DkS+
* @author treeroot MnTJFo"
* @since 2006-2-2 R@~=z5X(Q
* @version 1.0 .OcI.1H[
*/ z07Xj%zX9
public class SortUtil { i62GZeE
public final static int INSERT = 1; PvB{@82
public final static int BUBBLE = 2; ToR@XL!%rP
public final static int SELECTION = 3; "6q@}sz!
public final static int SHELL = 4; \c4D|7\=
public final static int QUICK = 5; :Lu 9w0>f
public final static int IMPROVED_QUICK = 6; bJoP@s
public final static int MERGE = 7; +$$5Cv5#<&
public final static int IMPROVED_MERGE = 8; )|wC 1J!L
public final static int HEAP = 9; =A{s,UP
Pl\NzB,`
public static void sort(int[] data) { `z$=J"%? y
sort(data, IMPROVED_QUICK); i5cK5MaD
} j:E3c\a
private static String[] name={ =z!/:M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [*U.bRs
}; rT(b t~Z
RQYD#4|
private static Sort[] impl=new Sort[]{ c2Wp 8l
new InsertSort(), yT|44 D2j
new BubbleSort(), ^cCNQS}r
new SelectionSort(), 3b[.s9Q
new ShellSort(), mJZB@m u?
new QuickSort(), MU:q`DRr
new ImprovedQuickSort(), b_f"(l8'S
new MergeSort(), S!66t?vHB
new ImprovedMergeSort(), 08+\fT [
new HeapSort() ipyc(u6Z5
}; xnxNc5$oE
U".5x~UC
public static String toString(int algorithm){ f7/M_sx
return name[algorithm-1]; :.u2^*<
} HCT+.n6
%bS1$ v\n
public static void sort(int[] data, int algorithm) { XT?wCb41R
impl[algorithm-1].sort(data); >XxHp
} o)n=n!A
T:SqENV
public static interface Sort { Qb|@DMq%
public void sort(int[] data); {YG qa$+\
} s|I$c;>
#v; :K8
public static void swap(int[] data, int i, int j) { B=~uJUr
int temp = data; (8~D^N6Z
data = data[j]; f@2F!
data[j] = temp; -]t>'Q?
} qh+&Zx~
} izzX$O[=: