[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; Q|rrbxb
} EGf9pcUEO&
int i1=l; %u-l6<w#R
int i2=mid+1; 79AOvh
for(int cur=l;cur<=r;cur++){ v[T5D:
if(i1==mid+1) S^HuQe!#
data[cur]=temp[i2++]; $cHA_$ `
else if(i2>r) w^sM,c5d
data[cur]=temp[i1++]; ~9#\+[ d_
else if(temp[i1] data[cur]=temp[i1++]; Xhe25
else )zkk%mE/IM
data[cur]=temp[i2++]; #(FG+Bk
} }rz}>((ZHF
} M$dDExd~
( ?3 )l
} kep.+t[
|d?0ZA:z
改进后的归并排序: Dtl381F J
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package org.rut.util.algorithm.support; ,kfUlv=
P^#<h"Ht
import org.rut.util.algorithm.SortUtil; }@_F( B
.-T^S"`d|
/** c~[L;_
* @author treeroot NdZv*
* @since 2006-2-2 8q{ %n
* @version 1.0 Zmw'.hL
*/ N>giFj[dD
public class ImprovedMergeSort implements SortUtil.Sort { _"6{Rb53v=
YIGQDj@
private static final int THRESHOLD = 10; /xj^TyWM
>y#<WB$i
/* (dvCejc^p
* (non-Javadoc) }A;J-7g6
* [vV]lWOp'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rm`_0}5
*/ H@GiHej
public void sort(int[] data) { @2cGx/1#
int[] temp=new int[data.length]; %:yJ/&-Q,Z
mergeSort(data,temp,0,data.length-1); %b<cJ]F
} #Y`GWT1==
/co^swz
private void mergeSort(int[] data, int[] temp, int l, int r) { 3QM6M9M
int i, j, k; RI9&KS
int mid = (l + r) / 2; 9E~=/Q=
if (l == r) |pqc(B u
return; MX2Zm
if ((mid - l) >= THRESHOLD) Elw fqfO
mergeSort(data, temp, l, mid); PMC5qQ%x
else CqOvVv
insertSort(data, l, mid - l + 1); =S7Xj`/
if ((r - mid) > THRESHOLD) LK5,GWF;
mergeSort(data, temp, mid + 1, r); aEBQx
else _0p8FhNt
insertSort(data, mid + 1, r - mid); ' ^L|}e
U[1Rw6
for (i = l; i <= mid; i++) { \7o&'zEw
temp = data; :23w[vt=
} wxU@M1w}
for (j = 1; j <= r - mid; j++) { IGqg,OEAp
temp[r - j + 1] = data[j + mid]; HE#IJB6BS?
} +j Z,vKr
int a = temp[l]; %>u(UmFO
int b = temp[r]; 1'ts>6b
for (i = l, j = r, k = l; k <= r; k++) { 30 e>C
if (a < b) { =?hGa;/rb
data[k] = temp[i++]; ?Co)7}N
a = temp; Q'D%?Vg'
} else { &-M>@BMy
data[k] = temp[j--]; c&4EO|
b = temp[j]; &f48MtE
} ! f!/~M"!
} H8@1Kt
} =UY)U-
t&m8 V$Q
/** KU:RS+,e;
* @param data KWwEK]
* @param l U4`6S43ki
* @param i fL-lx-~
*/ W%Jw\ z=
private void insertSort(int[] data, int start, int len) { REqQJ7a/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gt]k#(S
} U~h f,Oxi
} &!Sq6<!v2
} R#QOG}
} UYOveQ;
^!a4!DGVT
堆排序： n[|*[II
rf@Cz%xDD
package org.rut.util.algorithm.support; 1{%3OG^'
\mGx-g6
import org.rut.util.algorithm.SortUtil; N>a. dYXr
8rZJvE#c
/** 4G ?Cu,$
* @author treeroot al#BfcZW
* @since 2006-2-2 6b!F7kyg
* @version 1.0 Vc2(R^
*/ ^~dBO%M^
public class HeapSort implements SortUtil.Sort{ S=f:-?N|
`LroH>_
/* (non-Javadoc) :`jB1rI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VK)vb.:
*/ 19#s:nt9
public void sort(int[] data) { <I 5F@pe'
MaxHeap h=new MaxHeap(); v,}Mn7:
h.init(data); C0O$iWs=
for(int i=0;i h.remove(); {e35O(Y
System.arraycopy(h.queue,1,data,0,data.length); A-6><X's6
} }Mv$Up
)c6t`SBwi
private static class MaxHeap{ ^pc?oDPSg
]S2F9
void init(int[] data){ PH1jN?OEwZ
this.queue=new int[data.length+1]; . .5s2
for(int i=0;i queue[++size]=data; [}+h86:y
fixUp(size); 2%{(BT6
} `<#Ufi*c
} r$Tu``z \
.`ZuUr
private int size=0; &mPR[{
GEs5@EH
private int[] queue; w/49O;rV
5+Ld1nom
public int get() { >LAhc7I
return queue[1]; nSSj&q-O
} ;5dA
px=k&|l
public void remove() { fD* ?JzVY
SortUtil.swap(queue,1,size--); )a=FhSB[G
fixDown(1); F'^y?UP[
} 6Zx'$F.iqK
file://fixdown [QZ8M@Gty#
private void fixDown(int k) { s +Q'\?
int j; )b=m|A GX
while ((j = k << 1) <= size) { o4qB0h
if (j < size %26amp;%26amp; queue[j] j++; 9Od|R"aS|
if (queue[k]>queue[j]) file://不用交换 aYmN' POi
break; sUl _W"aQ
SortUtil.swap(queue,j,k); Z,QSbw@,7
k = j; &0Bs?oq_
} e_h`x+\:
} G0mvrc-(
private void fixUp(int k) { gk^`-`P
while (k > 1) { '-2|GX_o
int j = k >> 1; @wTRoMHPQ
if (queue[j]>queue[k]) %7SGQE#W_~
break; 8eDKN9kq
SortUtil.swap(queue,j,k); O|e/(s?$
k = j; XJguw/[wm
} +9NI=s6
} 52v@zDY
KrqO7
} s g6e% 5
&m~
} Uv|^k8(
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SortUtil： 3IYbgUG
)#0Llx!
package org.rut.util.algorithm; #(dERET*
Vd+5an?
import org.rut.util.algorithm.support.BubbleSort; LT:*K!>NOL
import org.rut.util.algorithm.support.HeapSort; W't.e0L<6
import org.rut.util.algorithm.support.ImprovedMergeSort; ?t"bF:!
import org.rut.util.algorithm.support.ImprovedQuickSort; |7:{vA5
import org.rut.util.algorithm.support.InsertSort; -z?O^:e#x
import org.rut.util.algorithm.support.MergeSort; W}.p,d
import org.rut.util.algorithm.support.QuickSort; l EsE]f
import org.rut.util.algorithm.support.SelectionSort; 'k!V!wcD^y
import org.rut.util.algorithm.support.ShellSort; Yvxp(
3@^b's'S|}
/** ^#,cWG}z
* @author treeroot TM$Ek^fQ.
* @since 2006-2-2 .,( ,<
* @version 1.0 ]zR,Y= #
*/ [.*o< KP
public class SortUtil { 90]{4]y;
public final static int INSERT = 1; Rss=ihlM
public final static int BUBBLE = 2; SPY4l*kX
public final static int SELECTION = 3; cwKOE?!
public final static int SHELL = 4; @V5'+^O
public final static int QUICK = 5; Ykt(%2L
public final static int IMPROVED_QUICK = 6; ]J6+nA6)
public final static int MERGE = 7; :O{oVR
public final static int IMPROVED_MERGE = 8; &`A2&mZ
public final static int HEAP = 9; >6cENe_@t
EL=}xug,?
public static void sort(int[] data) { ;3k6_ub
sort(data, IMPROVED_QUICK); +gsk}>"
} oO)KhA?y
private static String[] name={ #p^r)+\3=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2\1\Jn#q
}; q'p>__Ox
M[ZuXH}
private static Sort[] impl=new Sort[]{ #pz{,
new InsertSort(), *tZ#^YG{(
new BubbleSort(), w_ po47S4
new SelectionSort(), JI}p{yI
new ShellSort(), R(sa.Q\D4
new QuickSort(), %1p4K)
new ImprovedQuickSort(), fMFlY%@t
new MergeSort(), f3]u-e'b
new ImprovedMergeSort(), k^PqB+P!
new HeapSort() XT5Vo
}; 7F{=bL
A*:(%!
public static String toString(int algorithm){ +6* .lRA
return name[algorithm-1]; "@[xo7T
} 2)^[SpZ
!jDqRXi(
public static void sort(int[] data, int algorithm) { YMx zj
impl[algorithm-1].sort(data); r,4V SyZF\
} *X^__PS]
vAE?^*F
public static interface Sort { ^Y:Q%?uB/
public void sort(int[] data); Px4zI9;cB
} m&Mvb[
PHa#;6!5
public static void swap(int[] data, int i, int j) { O:a$ U:
int temp = data; BVC{Zq6hi
data = data[j]; Vy:ER
data[j] = temp; B|O/h!H.
} u[jdYWQa
} m`c(J1Et