[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; !sfXq"F
} 8z."X$
int i1=l; 7|+|\7l#
int i2=mid+1; $TD~k;
for(int cur=l;cur<=r;cur++){ ~$&:NB1~q
if(i1==mid+1) $KwI}>E4
data[cur]=temp[i2++]; 7g A08M[O
else if(i2>r) I9[1U
data[cur]=temp[i1++]; kb"_6,[Ms
else if(temp[i1] data[cur]=temp[i1++]; |2 YubAIZ(
else "'z,[v50&
data[cur]=temp[i2++]; u{OS6Ky
} XSm"I[.g
} wQD0vsD
9lZAa8Rxi
} eq@am(#&kY
<THZ2`tTK3
改进后的归并排序: d}{LM!s
7xv4E<r2
package org.rut.util.algorithm.support; yyY~ *Le
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import org.rut.util.algorithm.SortUtil; {) :%WnM9
?Do^stq'4
/** c-4m8Kg?L
* @author treeroot b!'l\~`{i
* @since 2006-2-2 JQKC;p
* @version 1.0 biK)&6|`sa
*/ ;ZQ-uz
public class ImprovedMergeSort implements SortUtil.Sort { D00G1:Ft(T
&v5G92
private static final int THRESHOLD = 10; r/NSD$-n
PGPISrf
/* 8)^B32
* (non-Javadoc) +Dx1/I
* G"o!}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S=0"f}Jo.
*/ \H Wcd|
public void sort(int[] data) { EJf#f
int[] temp=new int[data.length]; :]P~.PD5,
mergeSort(data,temp,0,data.length-1); YSR mt/
} !_CX2|
]pW86L%
private void mergeSort(int[] data, int[] temp, int l, int r) { O1GDugZ
int i, j, k; ~L-0~
int mid = (l + r) / 2; A}t%;V2
if (l == r) NFk}3w:
return; [##`Um
if ((mid - l) >= THRESHOLD) 403[oOj
mergeSort(data, temp, l, mid); YBb)/ZghY
else #O2wyG)oU
insertSort(data, l, mid - l + 1); vU=9ydAj?
if ((r - mid) > THRESHOLD) "$XYIuT
mergeSort(data, temp, mid + 1, r); 2v0!` &?M{
else ~I{EE[F>qL
insertSort(data, mid + 1, r - mid); 9T(L"9r-e
;B&^yj&;
for (i = l; i <= mid; i++) { BjJ,"sT
temp = data; K)\(wxv
} 4p.^'2m
for (j = 1; j <= r - mid; j++) { PG{i,xq_B{
temp[r - j + 1] = data[j + mid]; ?b||Cr
} =43I1&_
int a = temp[l]; 0cHfxy3
int b = temp[r]; O^5UB~
for (i = l, j = r, k = l; k <= r; k++) { kOw=c Gt
if (a < b) { J,f/fPaf7
data[k] = temp[i++]; z{ptm7
a = temp; 7;&(}
} else { y|$R`P
data[k] = temp[j--]; *)u?~r(F
b = temp[j]; 5L8&/EN9-
} $}t=RW
} \ht ?Gn
} g>so R&*
b"I~_CL|
/** LO)GTyzvJ
* @param data 8zY)J#
* @param l .*BA 1sjE
* @param i #~L!pKM
*/ 5sCFzo<=vh
private void insertSort(int[] data, int start, int len) { ;HDZ+B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z~,mRgc$B
} 2 P=[
} &VDl/qnaL
} 2d*_Qq1
} <3A0={En
4'',6KJ@
堆排序： yL6^\x
$.pTB(tO
package org.rut.util.algorithm.support; NmJ`?-Z
OTj,O77k
import org.rut.util.algorithm.SortUtil; ._?V%/
*i^`Dw^~y
/** h4_b!E@
* @author treeroot Gqb])gXpl
* @since 2006-2-2 ]4`t\YaT
* @version 1.0 ;B~P>n}}_]
*/ ;f:gX`"\
public class HeapSort implements SortUtil.Sort{ ^i+[m
v5_7r%Hiw
/* (non-Javadoc) 8nCp\0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )0^>#k
*/ i31<].|kA*
public void sort(int[] data) { `H>b5
MaxHeap h=new MaxHeap(); =!BobC- [b
h.init(data); afHaB/t{R
for(int i=0;i h.remove(); ks*Y9D*=
System.arraycopy(h.queue,1,data,0,data.length); VPt9QL(
} |~WYEh
UUeB;'E+
private static class MaxHeap{ /@hJpz|+
)tS-.PrA-
void init(int[] data){ WK0C
this.queue=new int[data.length+1]; t V03+&jF
for(int i=0;i queue[++size]=data; kZLMtj-
fixUp(size); 4U=75!>
} Z<U>A
} ]ab#q=
XM/vDdR
private int size=0; w7FoL
oKA&An
private int[] queue; r3qf[?3`6
ySe$4deJ
public int get() { hN3u@P^
return queue[1]; y7:tr
} \=;uu_v$
Ye5jB2Z
public void remove() { $d/&k`
SortUtil.swap(queue,1,size--); (&[[46
fixDown(1); +H_MV=A^
} )55\4<ty
file://fixdown 2#vv$YD
private void fixDown(int k) { =wG+Ao
int j; <P_ea/5:|
while ((j = k << 1) <= size) { n_Onr0EvO
if (j < size %26amp;%26amp; queue[j] j++; c0_E_~
if (queue[k]>queue[j]) file://不用交换 V5mlJml2(
break; e$e#NoN
SortUtil.swap(queue,j,k); ";x+1R.d
k = j; hIYTe
} }^-<k0A4?
} 8 TiG3
private void fixUp(int k) { P:C2G(V1AR
while (k > 1) { ffe1lw%
int j = k >> 1; fY,|o3#
if (queue[j]>queue[k]) >Kivuc
break; sbj";h=E
SortUtil.swap(queue,j,k); L?5f+@0.
k = j; H={&3poBz
} ;apzAF
} 2-'Opu
jjzA .8?(7
} ]]0,|My7
6GAaV[])'
} n6MM5h/#r
`_vB+a
SortUtil： B=Ym x2A9]
. ]@=es
package org.rut.util.algorithm; 2HD]?:Fk7
WG7k(Sp]
import org.rut.util.algorithm.support.BubbleSort; MFt*&%,JX
import org.rut.util.algorithm.support.HeapSort; ;sPoUn s'
import org.rut.util.algorithm.support.ImprovedMergeSort; 9H0Hu]zM
import org.rut.util.algorithm.support.ImprovedQuickSort; $HJTj29/
import org.rut.util.algorithm.support.InsertSort; {Qv>q$Q
import org.rut.util.algorithm.support.MergeSort; ;eL9{eF
import org.rut.util.algorithm.support.QuickSort; EH*o"N`!r
import org.rut.util.algorithm.support.SelectionSort; UPiW73Nu
import org.rut.util.algorithm.support.ShellSort; ,=QM#l]
3;[DJ5
/** A"v{~
* @author treeroot Q=uRKh
* @since 2006-2-2 T?Fcohz(
* @version 1.0 ;CHi\+` 5
*/ ~utJB 'gr
public class SortUtil { ziE*'p
public final static int INSERT = 1; O#a6+W"U
public final static int BUBBLE = 2; (X[CsaXt
public final static int SELECTION = 3; N K]B?
public final static int SHELL = 4; V9wI\0
public final static int QUICK = 5; Iu@y(wyg
public final static int IMPROVED_QUICK = 6; @}-r&/#
public final static int MERGE = 7; dXHB#
public final static int IMPROVED_MERGE = 8; .7NNT18
public final static int HEAP = 9; o Y}]UB>
ao" %WX
public static void sort(int[] data) { Sh6JF574T
sort(data, IMPROVED_QUICK); +pm[f["C.
} fvq,,@23
private static String[] name={ OZY,@c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e({9]
}; )E#2J$TD
=sJ _yq0#R
private static Sort[] impl=new Sort[]{ [,RI-#n
new InsertSort(), 3REx45M2
new BubbleSort(), lbdTQ6R
new SelectionSort(), H9)m^*
new ShellSort(), %xZG*2vc!B
new QuickSort(), }@1q@xU
new ImprovedQuickSort(), I){\0vb@
new MergeSort(), A- YBQPE
new ImprovedMergeSort(), 7dG79H
new HeapSort() *OJ/V O
}; -|k)tvAm
LQ11ba
public static String toString(int algorithm){ qBV x6MI
return name[algorithm-1]; YTQt3=1ii
} "@A![iP
2&'|Eqk
public static void sort(int[] data, int algorithm) { 7uorQfR?
impl[algorithm-1].sort(data); |BT MJ:B
} vbx6I>\Y
K;hh&sTB
public static interface Sort { 1=sXdcy;
public void sort(int[] data); Q5{Pv}Jx
} }?F`t[+
@ V08U!
public static void swap(int[] data, int i, int j) { 9Jf)!o8
int temp = data; i,A#&YDl
data = data[j]; 4/kv3rv
data[j] = temp; <ljI;xE
} %CwL:.|
} gWABY%!}