[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; bt+,0\Vg5
} }wSi~^*
int i1=l; ^C&+ ~+
int i2=mid+1; *5%*|>
for(int cur=l;cur<=r;cur++){ YEjY8]t
if(i1==mid+1) P];JKE%
data[cur]=temp[i2++]; gM;}#>6
else if(i2>r) wN37zPnV~
data[cur]=temp[i1++]; PBks` |+
else if(temp[i1] data[cur]=temp[i1++]; @E`?<|B}
else Mu_i$j$vvP
data[cur]=temp[i2++]; z}}]jR\y?
} j_?cpm{~ml
} iZ[tHw||
fm1X1T.
} {gf>*
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改进后的归并排序: ;~HNpu$
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package org.rut.util.algorithm.support; Tc ZnmN
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import org.rut.util.algorithm.SortUtil; 1TqF6`;+
>3;^l/2c
/** o%(bQV-T
* @author treeroot VlW9UF-W
* @since 2006-2-2 ^6/j_G
* @version 1.0 zCXqBuvu1
*/ ].DY"
public class ImprovedMergeSort implements SortUtil.Sort { 6i@ub%qq
.PVLWW
private static final int THRESHOLD = 10; #t71U a
eFQQW`J
/* l^ 4OC
* (non-Javadoc) ;:#U6?=t
* "!&B4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }6~)bLzI}
*/ #0MK(Ut/
public void sort(int[] data) { M|CrBJv+F
int[] temp=new int[data.length]; <A~GW 'HB
mergeSort(data,temp,0,data.length-1); 9EgP9up{6!
} AF#_nK)@
{*=E?oF@
private void mergeSort(int[] data, int[] temp, int l, int r) { ]UUI~sFE
int i, j, k; .Vx|'-u
int mid = (l + r) / 2; NM L|"R;
if (l == r) u7k|7e=xk
return; ' Js?N
if ((mid - l) >= THRESHOLD) 82.HH5Z{
mergeSort(data, temp, l, mid); C M^r|4K
else '8={ sMy
insertSort(data, l, mid - l + 1); LT&/0
if ((r - mid) > THRESHOLD) Cg*kN"8q
mergeSort(data, temp, mid + 1, r); /1N)d?Pcl
else (k#t}B[
insertSort(data, mid + 1, r - mid); /xf.\Z7<
} Ab_o#Zy
for (i = l; i <= mid; i++) { (ic@3:xR
temp = data; 'rh\CA/}D
} ]wR6bEm7
for (j = 1; j <= r - mid; j++) { }Oh5Nm)
temp[r - j + 1] = data[j + mid]; a^x 0 l
} R{ 4u|A?9
int a = temp[l]; Ss+F9J
int b = temp[r]; U#$:\fT
for (i = l, j = r, k = l; k <= r; k++) { G-sa L*
if (a < b) { JQr36U
data[k] = temp[i++]; Lm.Ik}Gli
a = temp; 4(;20(q]
} else { 8W{ g
data[k] = temp[j--]; W >Kp\tD
b = temp[j]; 5 5a@)>h
} }:"R-s
} /T{mS7EpYc
} ,qYf#fU#7
KM EXT$p
/** ayN*fiV]
* @param data -IGMl_s
* @param l 2Sv>C `FMU
* @param i ^75pV%<%
*/ Z#%}K Z
private void insertSort(int[] data, int start, int len) { e-1;dX HL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;k-g_{M
} L/c4"f|.*v
} P:jDB{
} F1zT )wW
} 7ucx6J]c
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堆排序： 5Gc_LI&v7
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package org.rut.util.algorithm.support; Ug%<b
f;&` 9s| 1
import org.rut.util.algorithm.SortUtil; !>?4[|?n<
6oPUYn-
/** &9S8al 8"
* @author treeroot "tEj`eR
* @since 2006-2-2 j0Id!o
* @version 1.0 x;<oaT$X
*/ Ka[Sm|-q
public class HeapSort implements SortUtil.Sort{ ,ZsYXW
)*"T
/* (non-Javadoc) Zb12:?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nD^{Q[E6=
*/ d<e+__2
public void sort(int[] data) { ly9x1`?$
MaxHeap h=new MaxHeap(); \65vfE~ O
h.init(data); f>.`xC{
for(int i=0;i h.remove(); GGYX!=]~
System.arraycopy(h.queue,1,data,0,data.length); ^p{A!I!
} WV5r$
l"2^S6vU
private static class MaxHeap{ O7Y P_<,#
b|\{ !N]
void init(int[] data){ 9Ba%=
this.queue=new int[data.length+1]; !Qj)tS#Az
for(int i=0;i queue[++size]=data; ^TuP=q5?
fixUp(size); H5F\-&cq
} ::^qy^n
} iX0]g45o
~z-?rW
private int size=0; 'Qp&,xK
c+)36/; X
private int[] queue; [qO5~E`;
bUY:XmA
public int get() { U]`'GM/x
return queue[1]; _RA{SO
} W>aQ tT
HM(bR"E
public void remove() { Zpn*XG
SortUtil.swap(queue,1,size--); E-BOIy,
fixDown(1); ;W$w=j: O{
} K#m\qitb
file://fixdown ,u8ZS|9
private void fixDown(int k) { )D6'k{6M
int j; ue^?/{OuT
while ((j = k << 1) <= size) { #'G7mAoA
if (j < size %26amp;%26amp; queue[j] j++; S?,KgMVM
if (queue[k]>queue[j]) file://不用交换 DRKc&F6Qy
break; (IO\+
SortUtil.swap(queue,j,k); EA%#/n
k = j; !DY2{Wb
} ?vL^:f["
} n##w[7B*
private void fixUp(int k) { 77=y!SDP
while (k > 1) { JXR/K=<^
int j = k >> 1; !^"!fuoNC
if (queue[j]>queue[k]) 1-Wnc'(OK
break; ,aj+mlZd2
SortUtil.swap(queue,j,k); 51(`wo>LS
k = j; !+26a*P
} 'r?HL;,q
} I>4Tbwy.-
0f#a_
} Qj~W-^/ -
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} 0 c'2rx
z?) RF[
SortUtil： 2.L6]^N p(
8!fAv$g0
package org.rut.util.algorithm; &+r ;>
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import org.rut.util.algorithm.support.BubbleSort; +nyN+X34B
import org.rut.util.algorithm.support.HeapSort; )+{omQ7v
import org.rut.util.algorithm.support.ImprovedMergeSort; KL\=:iWA
import org.rut.util.algorithm.support.ImprovedQuickSort; DBh/V#* D
import org.rut.util.algorithm.support.InsertSort; BHBT=,sI
import org.rut.util.algorithm.support.MergeSort; {c EKz\RX
import org.rut.util.algorithm.support.QuickSort; ;NVTn<Uj
import org.rut.util.algorithm.support.SelectionSort; -N!soJ<
import org.rut.util.algorithm.support.ShellSort; :x5o3xE
n7!Lwq2
/** w0%ex#lkm
* @author treeroot (a4y1k t-
* @since 2006-2-2 B46H@]d#7K
* @version 1.0 @KRn3$U
*/ .$}zw|,q
public class SortUtil { ~322dG
public final static int INSERT = 1; 8\t7}8f
public final static int BUBBLE = 2; ]be2jQx3
public final static int SELECTION = 3; [&}<!:9'
public final static int SHELL = 4; yT9RNo/w
public final static int QUICK = 5; ^>}[[:(6/
public final static int IMPROVED_QUICK = 6; ,7nb;$]
public final static int MERGE = 7; uC ;PP=z
public final static int IMPROVED_MERGE = 8; 91Sb=9
public final static int HEAP = 9; M@ZpgAfq
I8wVvs;k
public static void sort(int[] data) { lSv;wwEg
sort(data, IMPROVED_QUICK); gK_[3FiKt
} H4",r5qw:
private static String[] name={ >l*9DaZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JWjp<{Q;1
}; v8(u9V%?6
p" W0$t.
private static Sort[] impl=new Sort[]{ &IY_z0=
new InsertSort(), s|`)'
new BubbleSort(), (w
new SelectionSort(), *wyLX9{:
new ShellSort(), B{7/A[$%C
new QuickSort(), tF1%=&ss
new ImprovedQuickSort(), 1MFpuPJk
new MergeSort(), jmVy4* P_
new ImprovedMergeSort(), m8A1^ R
new HeapSort() 9rc n*sm
}; B>21A9&
Gf.o{
public static String toString(int algorithm){ l+qtA~V&2
return name[algorithm-1]; n 9M6wS
} eV}Tx;1|}
m*,[1oeG&
public static void sort(int[] data, int algorithm) { }r<^]Q*&p
impl[algorithm-1].sort(data); [m&ZAq
} UHHKI)(
.Sw'Bo!Ee
public static interface Sort { *dgNpJ 9
public void sort(int[] data); @y&,e,3!
} "$YLU}S9
XmR5dLc8
public static void swap(int[] data, int i, int j) { <OB~60h"
int temp = data; SXF_)1QO\W
data = data[j]; ]`9K|v
data[j] = temp; 8 z7,W3b
} j"8N)la
} '" yl>"