[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; PSEWL6=]N
} ?360SQ<
int i1=l; w-dI<s
int i2=mid+1; CXa Ld7nMX
for(int cur=l;cur<=r;cur++){ Oo/8Y E@
if(i1==mid+1) "3ug}k
data[cur]=temp[i2++]; =AzOnXW:S
else if(i2>r) j]4,6`b\
data[cur]=temp[i1++]; S~|tfJpL
else if(temp[i1] data[cur]=temp[i1++]; D2?S,9+E_
else &NP6%}bR`
data[cur]=temp[i2++]; ~*kK4]lP
} bZXlJa`'S
} . =R=cA7
5*XH6g F
} _Ff".t<"
7?"9J`*
改进后的归并排序: ]0YDb~UB
9/Wn!Ld
package org.rut.util.algorithm.support; hOn
h{H]xe[Q
import org.rut.util.algorithm.SortUtil; 5C65v:Q`N
K /ZHJkJ7
/** } Ab_o#Zy
* @author treeroot 6>lW5U^yA\
* @since 2006-2-2 'F<Sf:?.p
* @version 1.0 5E.vje{U;
*/ U5clQiow
public class ImprovedMergeSort implements SortUtil.Sort { iW-t}}Z>B
Y)v%
private static final int THRESHOLD = 10; Hq-v@@0 *
i2U/RXu
/* hvL6zCi
* (non-Javadoc) `{WCrw6)
* 1V\1]J/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YOlH*cZtg
*/ klo^K9!
public void sort(int[] data) { S}O5l}E
int[] temp=new int[data.length]; U#$:\fT
mergeSort(data,temp,0,data.length-1); P8u"T!G
} ?qIGQ/af&
m9k2h1
private void mergeSort(int[] data, int[] temp, int l, int r) { pdy+h{]3
int i, j, k; J:[3;Z
int mid = (l + r) / 2; @NBXyC8,Z
if (l == r) E~qK&7+
return; Upu%.[7
if ((mid - l) >= THRESHOLD) /:^tc/5U]
mergeSort(data, temp, l, mid); }Uq/kei^P
else !Am =v=>
insertSort(data, l, mid - l + 1); nT)~w s
if ((r - mid) > THRESHOLD) 'oT|cmlc
mergeSort(data, temp, mid + 1, r); hPS/CgLq
else }0krSzcn#,
insertSort(data, mid + 1, r - mid); EtPgzw[#c9
=$[W,+X6f
for (i = l; i <= mid; i++) { cUYX1a)8
temp = data; 9/^d~ZO
} we @Yw6<
for (j = 1; j <= r - mid; j++) { y.%i
temp[r - j + 1] = data[j + mid]; cx<h_
} l; */M.B
int a = temp[l]; B piEAwh
int b = temp[r]; S[ i$e
for (i = l, j = r, k = l; k <= r; k++) { \:C%> .VG
if (a < b) { rC~_:uXtE
data[k] = temp[i++]; ,Qga|n8C
a = temp; @RQ+JYQi
} else { :E}6S
data[k] = temp[j--]; &(GopWR`e
b = temp[j]; 8 `yB
} +)% ,G@-`
} _%XbxP6rH
} eNHpgj
"ngSilH?D
/** /Lj%A
* @param data ^9n}-Cqeq
* @param l P:jDB{
* @param i &qG?[R{
*/ |YJ$c@
private void insertSort(int[] data, int start, int len) { rUGZjLIGqz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -<H ri5
} 6Uch0xha!
} p^}L
} ^"PfDTyA
} 0oXK&Z
~>lOl/n5
堆排序： nqBG]y aI
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package org.rut.util.algorithm.support; A3m{jbh
ccIDMJ=2
import org.rut.util.algorithm.SortUtil; 6hR^qdHg
'3IkPy1Uz
/** oD Q9.t
* @author treeroot @#'yPV1
* @since 2006-2-2 z&\Il#'\m+
* @version 1.0 uv?8V@x2
*/ x;<oaT$X
public class HeapSort implements SortUtil.Sort{ <|ka{=T
.dy#n`eP
/* (non-Javadoc) (K!M*d+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v#{G8'+%
*/ )*"T
public void sort(int[] data) { +d|:s
MaxHeap h=new MaxHeap(); 3Pw%[q=g
h.init(data); 9;}L{yve
for(int i=0;i h.remove(); "TEBByO'
System.arraycopy(h.queue,1,data,0,data.length); W9:fKP
} $K5ni{M;
7[(Lrx.pM
private static class MaxHeap{ * [iity
`two|gX0K
void init(int[] data){ f>.`xC{
this.queue=new int[data.length+1]; v)wY
for(int i=0;i queue[++size]=data; &\CJg'D:m
fixUp(size); TsoCW]h
} [i2A{(x
} V,99N'o~x
;P0,60
private int size=0; yaCd4KP
l"2^S6vU
private int[] queue; EOMuqP)
O7Y P_<,#
public int get() { PT 0Qzg
return queue[1]; V'Sd[*
} t?pIE cl
B<vvsp\X
public void remove() { !Qj)tS#Az
SortUtil.swap(queue,1,size--); &;SwLDF"1
fixDown(1); ]<&B BQ
} @]?? +f}#
file://fixdown :mCw.Jz<h
private void fixDown(int k) { LZ=wz.'u
int j; _stI?fz*4k
while ((j = k << 1) <= size) { B]+7 JB
if (j < size %26amp;%26amp; queue[j] j++; s8`}x_k=
if (queue[k]>queue[j]) file://不用交换 lq78gOg{
break; Fjb4BdZP
SortUtil.swap(queue,j,k); IN]`lJ
k = j; (:</R$I
} Y3 Pz00x
} <-Kb@V3
private void fixUp(int k) { bUY:XmA
while (k > 1) { ,)B~cic'u
int j = k >> 1; SXT@& @E
if (queue[j]>queue[k]) UBUB/NY
break; ^VM"!O;h{
SortUtil.swap(queue,j,k); o>/uW8
k = j; s= -WB0E
} i} NkHEK
} E< io^
Mo:!jS~a(Z
} +R{A'Yl[(
yH0yO*RZ
} vu !j{%GO
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SortUtil： .P|+oYT&g
7$Z)fkx.
package org.rut.util.algorithm; T2/v}
46Y7HTwE
import org.rut.util.algorithm.support.BubbleSort; 0{U]STj
import org.rut.util.algorithm.support.HeapSort; @M1yBN
import org.rut.util.algorithm.support.ImprovedMergeSort; &CxyP_
import org.rut.util.algorithm.support.ImprovedQuickSort; 2Q`PUXj
import org.rut.util.algorithm.support.InsertSort; y4)ZUv,}
import org.rut.util.algorithm.support.MergeSort; HlOAo:8'
import org.rut.util.algorithm.support.QuickSort; k=ior
import org.rut.util.algorithm.support.SelectionSort; X$j|/))
import org.rut.util.algorithm.support.ShellSort; EA%#/n
'AAF/9
/** EDPI*@>
* @author treeroot x0AqhT5}
* @since 2006-2-2 O|^6UH
* @version 1.0 4X(1
*/ +Zty}fe
public class SortUtil { kG|>_5
public final static int INSERT = 1; )|59FOWg
public final static int BUBBLE = 2; U&d-?PI
public final static int SELECTION = 3; ^=-*L 3f
public final static int SHELL = 4; k`iq<b
public final static int QUICK = 5; 's7SZ$(
public final static int IMPROVED_QUICK = 6; M rH%hRV6R
public final static int MERGE = 7; qw Kh,[]
public final static int IMPROVED_MERGE = 8; gOES2 4$2
public final static int HEAP = 9; g#9*bF
K\Y6 cj
public static void sort(int[] data) { rH}Dt@
sort(data, IMPROVED_QUICK); 7Dx .;
} |RvpEy76
private static String[] name={ $fj"*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Hjo:;s
}; RJ`/qXL
+i q+
private static Sort[] impl=new Sort[]{ $J;=Ux)$
new InsertSort(), W:;`
new BubbleSort(), 2\iD;Z#gM
new SelectionSort(), v0H>iKh7
new ShellSort(), 1VPN#Q!
new QuickSort(), Tg{dIh.Q~O
new ImprovedQuickSort(), n)wpxR
new MergeSort(), #IL~0t
new ImprovedMergeSort(), )n3biQL_
new HeapSort() 4%c7#AX[T
}; B9;,A;E};
9cw4tqTm
public static String toString(int algorithm){ =Y=^]ayO/
return name[algorithm-1]; 46.q anh
} I;|5C=!
[u9S+:7"
public static void sort(int[] data, int algorithm) { y!{/'{?P
impl[algorithm-1].sort(data); #Ko+_Hm?4
} 40l#'< y;
S9ak '
public static interface Sort { 9{]r+z:
public void sort(int[] data); ay7+H7^|hZ
} *{D:1S
!tFU9Zt
public static void swap(int[] data, int i, int j) { V"Y Fu^L
int temp = data; |0vHy7CE
data = data[j]; DT7-v4Zd
data[j] = temp; T$8$9D_u
} :BZx)HxQ
} oRJP5Y5na