[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; Elp!,(+&6
} BcLt95;.\
int i1=l; 5B 7*Z
int i2=mid+1; ^WD$ gd
for(int cur=l;cur<=r;cur++){ @>5<m'}2
if(i1==mid+1) }^[@m#
data[cur]=temp[i2++]; 1VFqT'
else if(i2>r) pCc7T-"og
data[cur]=temp[i1++]; %B*dj9n^q
else if(temp[i1] data[cur]=temp[i1++]; .Qt3!ek
else gN(hv.nQ
data[cur]=temp[i2++]; <gLtX[v!CL
} 05B+WJ1
} C8:"+;
YZRB4T9
} wF8\
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改进后的归并排序: )|R9mW=k9P
~C/KA6H
package org.rut.util.algorithm.support; F5+_p@!i
gi'agB^
import org.rut.util.algorithm.SortUtil; A#S:_d
Qiw4'xQm
/** t5X lR]` w
* @author treeroot ]?(F'&
* @since 2006-2-2 f9UaAdJ(
* @version 1.0 "5:f{GfO#v
*/ )V3(nZY
public class ImprovedMergeSort implements SortUtil.Sort { A.9'pi'[9Q
=jc8=h[F<
private static final int THRESHOLD = 10; V1)P=?%(US
U!:!]DX(
/* oxQID
* (non-Javadoc) %:KV2GP
* vQmackY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Us,[xQ
*/ JjLyV`DJ
public void sort(int[] data) { >x ghq
int[] temp=new int[data.length]; "jO3Y/>S
mergeSort(data,temp,0,data.length-1); @O}j:b
} sLdUrD%
`l2<
private void mergeSort(int[] data, int[] temp, int l, int r) { Sn2Ds)Pfx3
int i, j, k; qMES<UL>
int mid = (l + r) / 2; gH^$Y~Lx
if (l == r) xeM':hD.o
return; IXvz&4VD
if ((mid - l) >= THRESHOLD) |4.o$*0Y
mergeSort(data, temp, l, mid); ' P`p.5nH
else KV}U{s+U8
insertSort(data, l, mid - l + 1); 19 wqDIE0
if ((r - mid) > THRESHOLD) <ytKf<a%e
mergeSort(data, temp, mid + 1, r); nX\]i~
else ;[%}Xx
insertSort(data, mid + 1, r - mid); }u_EXP8M
Pgw%SMEp
for (i = l; i <= mid; i++) { RyOT[J
temp = data; b2X'AHK S
} P^3m:bE]
for (j = 1; j <= r - mid; j++) { \1mM5r~
temp[r - j + 1] = data[j + mid]; ~Oq,[,W
} &U$8zn~[k
int a = temp[l]; 0IgnpeA]
int b = temp[r]; } ndvV~*1
for (i = l, j = r, k = l; k <= r; k++) { K=Z]#bm
if (a < b) { 0*Km}?;0-
data[k] = temp[i++]; `bZU&A(`Be
a = temp; E)Qh]:<2v
} else { PR@4' r|a
data[k] = temp[j--]; 7s8<FyFsjd
b = temp[j]; R #3Q$
} m>+,^`0
} w$lfR,
} 4nII/cPG
z[\W\g*|ri
/** FW)^O%2s
* @param data I0w@S7
* @param l ?[S >&Vq
* @param i @SC-vc
*/ sb|3|J6=
private void insertSort(int[] data, int start, int len) { Q;XHHk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O<dZA=Oez
} p~q_0Pg%
} RUk<=!U
} ()C^ta_]
} g)9JO6]
[pW1=tI
堆排序： K\KO5A
N=Uc=I7C
package org.rut.util.algorithm.support; @ojg`!,
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import org.rut.util.algorithm.SortUtil; Dl zmAN
Sz|Y$,
/** 85%Pq:E
* @author treeroot u1;e*ty
* @since 2006-2-2 X(!AI|6Bt
* @version 1.0 pcuMGo-#
*/ "zedbJ0
public class HeapSort implements SortUtil.Sort{ k>:/D
nI*(a:
/* (non-Javadoc) t?9;cS4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i_0,BVC
*/ WAwfL?
public void sort(int[] data) { xS~yH[k
MaxHeap h=new MaxHeap(); mI7rx`4H
h.init(data); =nvAOvP{?
for(int i=0;i h.remove(); *>GIk`!wM
System.arraycopy(h.queue,1,data,0,data.length); s3Krob`C5
} q: Bt]2x
//X e*0
private static class MaxHeap{ E+m]aYu"
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void init(int[] data){ Ej+]^t$\
this.queue=new int[data.length+1]; kJurUDo
for(int i=0;i queue[++size]=data; { OxAY_
fixUp(size); jMf 7J
} 'HQ7 |Je
} }RA3$%3
foFg((tS
private int size=0; h;EwkbDQg>
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private int[] queue; iHE0N6%q
-7-Fd_F8
public int get() { BrNG%%n
return queue[1]; $Yx6#m}[M
} FXOT+9bg
iot.E%G
public void remove() { RwAbIXG{0
SortUtil.swap(queue,1,size--); Yg=E@F
fixDown(1); Z:_m}Ya|
} ]RH=s7L
file://fixdown ><;l:RGK|
private void fixDown(int k) { GOYn\N;V2
int j; )Lc<;=w'9
while ((j = k << 1) <= size) { 85r)>aCMn
if (j < size %26amp;%26amp; queue[j] j++; f MY;
if (queue[k]>queue[j]) file://不用交换 ).0V%}>
break; *? K4!q'
SortUtil.swap(queue,j,k); ,+ns {ppn
k = j; %_B:EMPd
} , @%C8Z
} -H1"OJ2aF
private void fixUp(int k) { -1jjB1
while (k > 1) { c }<*~w;
int j = k >> 1; ~vW)1XnK
if (queue[j]>queue[k]) S|K|rDr0n
break; >]Mq)V9
SortUtil.swap(queue,j,k); >AR Tr'B
k = j; -"~L2f"?
} LPEjRG,
} T&9`?QD
94T}iY.
} )u39}dpeu
<@u0.-]
} 5TXg;v#Z
KY4d+~2
SortUtil： -W|*fKN`3
u^`eKak"l
package org.rut.util.algorithm; OJMvn'y
R&6n?g6@/V
import org.rut.util.algorithm.support.BubbleSort; |7rR99
import org.rut.util.algorithm.support.HeapSort; P['X<Xt8
import org.rut.util.algorithm.support.ImprovedMergeSort; IXGW2z;
import org.rut.util.algorithm.support.ImprovedQuickSort; [ 3$.*
import org.rut.util.algorithm.support.InsertSort; \e?.hmq
import org.rut.util.algorithm.support.MergeSort; ~?FK ; (
import org.rut.util.algorithm.support.QuickSort; Dz[566UD
import org.rut.util.algorithm.support.SelectionSort; +VSZhg,Np8
import org.rut.util.algorithm.support.ShellSort; sW;7m[o
=y?#^
/** ~_ *H)|
* @author treeroot ~k9O5S{
* @since 2006-2-2 fph-v-cl
* @version 1.0 J1.qhy>
*/ (FM4 ^#6
public class SortUtil { fucUwf\_
public final static int INSERT = 1; @(Z( /P;:
public final static int BUBBLE = 2; {J{1`@
public final static int SELECTION = 3; Af`z/:0<
public final static int SHELL = 4; D^|jZOJ
public final static int QUICK = 5; F vj{@B!
public final static int IMPROVED_QUICK = 6; LRWOBD
public final static int MERGE = 7; smV!y8&
public final static int IMPROVED_MERGE = 8; d{W}p~UbH
public final static int HEAP = 9; /v5qyR7an
/4yOs@#
public static void sort(int[] data) { H\ 3M
sort(data, IMPROVED_QUICK); pP3U,n
} ~ 9=27p
private static String[] name={ USprsaj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u2 7S%2P
}; d5Qd'
P2Onkl
private static Sort[] impl=new Sort[]{ "r@G@pe
new InsertSort(), ?gLAWz
new BubbleSort(), VQ2Fnb4
new SelectionSort(), SWT:frki`
new ShellSort(), ;J'OakeVO
new QuickSort(), i!L;? `F{
new ImprovedQuickSort(), @.k5MOn
new MergeSort(), ovz#
new ImprovedMergeSort(), +I&J7ICV0
new HeapSort() r]0(qg
}; `0?^[;[u[
9<v}LeX
public static String toString(int algorithm){ sW?B7o?
return name[algorithm-1]; q8/ihA6:
} ms7SoYbSu
IQIbz{bMx
public static void sort(int[] data, int algorithm) { $Buf#8)F*
impl[algorithm-1].sort(data); %bXsGPB
} ;|6FdU
2hy NVG&$
public static interface Sort { %lV@:"G
public void sort(int[] data); FRgLlp8x
} )=Zsv40O
o_O+u%y
public static void swap(int[] data, int i, int j) { EX4 C.C|d
int temp = data; l&3ki!
data = data[j]; |#V(p^
data[j] = temp; !_dR'
} \dTQQ
} OTE<x"=h