[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; t&0p@xLQ
} (`N/1}vk
int i1=l; ~a}pYLxl
int i2=mid+1; <f%9w]
for(int cur=l;cur<=r;cur++){ zq#o8))4X
if(i1==mid+1) 8~bPoWP
data[cur]=temp[i2++]; U7N<!6
else if(i2>r) HD>{UU?
data[cur]=temp[i1++]; utXcfKdt
else if(temp[i1] data[cur]=temp[i1++]; e:]$UAzp
else !WmpnPr1
data[cur]=temp[i2++]; 9z?F_=PB!
} K':f!sZ&2
} k dqH36&<
@NF8?>!
} f{J7a1 `_
&*}S 0
改进后的归并排序: pfG:PrZ
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package org.rut.util.algorithm.support; (.cT<(TB
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import org.rut.util.algorithm.SortUtil; "v06Fj>q
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/** BsAglem
* @author treeroot l40$}!!<
* @since 2006-2-2 6eBQ9XV
* @version 1.0 GZ%RfKyQ
*/ ETIf x)B-
public class ImprovedMergeSort implements SortUtil.Sort { X$aMf&x
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private static final int THRESHOLD = 10; <5.{+!BM
` mi!"pmw
/* +RM3EvglDQ
* (non-Javadoc) cGDA0#r
* (8{Z@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >&TktQO_T
*/ T'XRl@
public void sort(int[] data) { >wn&+%i&
int[] temp=new int[data.length]; W^x[maz
mergeSort(data,temp,0,data.length-1); ,/KHKLY7
} =F`h2A;a
a7Jr} "B
private void mergeSort(int[] data, int[] temp, int l, int r) { tf,_4_7#$
int i, j, k; r&qD!l5y
int mid = (l + r) / 2; BBX4^;t
if (l == r) 0Ec -/
return; 2aG<^3
if ((mid - l) >= THRESHOLD) P>H'od
mergeSort(data, temp, l, mid); Av'H(qB\K
else 4DNZ y2`
insertSort(data, l, mid - l + 1); ecb[m2z
if ((r - mid) > THRESHOLD) ,W#y7t
mergeSort(data, temp, mid + 1, r); /xmd]XM=_
else dZm{?\^_
insertSort(data, mid + 1, r - mid); a8N!jQc_m
iJ\#su
for (i = l; i <= mid; i++) { i-Z@6\/a5
temp = data; D@Q|QY5qic
} b`2~
for (j = 1; j <= r - mid; j++) { pyNPdEy
temp[r - j + 1] = data[j + mid]; ?vhW`LXNB
} k`?n("j
int a = temp[l]; 5rc<ibGh
int b = temp[r]; {BJxRH"&6*
for (i = l, j = r, k = l; k <= r; k++) { ELm#
if (a < b) { hZpFI?lqc\
data[k] = temp[i++]; }>j$Wr_h
a = temp; Bg3^BOT
} else { @=9QV3D
data[k] = temp[j--]; W&"FejD
b = temp[j]; f; 22viE
} WN0^hDc-
} m?csake.Me
} wiutUb Y
GVg0)}
/** X9P-fF?0
* @param data PBUc9/
* @param l r1[0#5kJ;J
* @param i 2]7nw1&
*/ !,\]> c
private void insertSort(int[] data, int start, int len) { N=wB1gJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &W ~,q(
} XW19hG
} 8mV35A7l
} G~_dSa@g G
} JeO(sj$e
]@'YlPU
堆排序： ";jhj:Xj
7~IAgjo,@
package org.rut.util.algorithm.support; rR7}SEa
m1(rAr1
import org.rut.util.algorithm.SortUtil; dkXK0k
T# 8O:
/** &BQ`4j~.
* @author treeroot +>s[w{Svy
* @since 2006-2-2 F`3I~(
* @version 1.0 rUj]6j=e
*/ y:457R2F
public class HeapSort implements SortUtil.Sort{ L:S[QwQu8
<5nz:B/
/* (non-Javadoc) b[/-lNrc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'a0$74fz
*/ z-()7WY
public void sort(int[] data) { k:c)|2
MaxHeap h=new MaxHeap(); !7_Q_h',
h.init(data); 5T,`j=\
for(int i=0;i h.remove(); a.q=
System.arraycopy(h.queue,1,data,0,data.length); SL*B `P~{
} #"TTI vd0
En[cg
private static class MaxHeap{ *t~(_j
E*CY/F I_
void init(int[] data){ -qs9a}iL
this.queue=new int[data.length+1]; WT1ch0~2
for(int i=0;i queue[++size]=data; P[D^*}
fixUp(size); H3&$:h
} A$ s4Q0Mf
} vmL0H)q
ba ,2.|
private int size=0; @o_-UsUX
Yw./V0Z{@
private int[] queue; '(ql7
q),yY]5
public int get() { JD,/oL.KA
return queue[1]; A9[l5E
} 1}'|HAu
+}%4]O;
public void remove() { MbF.KmV
SortUtil.swap(queue,1,size--); :]:q=1;c
fixDown(1); nqr[HFWs
} ~ZT(@w
file://fixdown 1{_;`V
private void fixDown(int k) { p6|0JBm
int j; mI}1si=$
while ((j = k << 1) <= size) { @<l7"y;\
if (j < size %26amp;%26amp; queue[j] j++; }O8$?7j(
if (queue[k]>queue[j]) file://不用交换 6tj+
break; rIy,gZr.U
SortUtil.swap(queue,j,k); dZ_Hj X7
k = j; bz,C%HFA
} !}<Y^="
} yyG:Kl
private void fixUp(int k) { G9d@vu
while (k > 1) { E7ixl~
int j = k >> 1; U }xRvNz
if (queue[j]>queue[k]) tvavI9
break; '`^`NI`
SortUtil.swap(queue,j,k); iku) otUc
k = j; aO6w:IO
} RP!X5
} %i$]S`A}
'f]\@&Np
} :Fu.S1j$
k\I+T~~xD
} S}mqK|!
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SortUtil： .r$d 8J
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package org.rut.util.algorithm; yKgA"NaM
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import org.rut.util.algorithm.support.BubbleSort; ^pIT,|myY7
import org.rut.util.algorithm.support.HeapSort; 7ZqC1
import org.rut.util.algorithm.support.ImprovedMergeSort; Ar,B7-F!
import org.rut.util.algorithm.support.ImprovedQuickSort; kg1z"EE
import org.rut.util.algorithm.support.InsertSort; @.@O#
import org.rut.util.algorithm.support.MergeSort; UTC|8
import org.rut.util.algorithm.support.QuickSort; $QN}2lJ>
import org.rut.util.algorithm.support.SelectionSort; #[ipJ %
import org.rut.util.algorithm.support.ShellSort; { LZ` _1D
Dz3=ksXZ
/** 9/'zk
* @author treeroot =*_T;;E
* @since 2006-2-2 GB&<+5t2
* @version 1.0 #+>8gq^5
*/ x(ue |UG
public class SortUtil { /J9|.];%r
public final static int INSERT = 1; H}Z\r2
public final static int BUBBLE = 2; N D`?T &PK
public final static int SELECTION = 3; tY'fFz^Ho
public final static int SHELL = 4; fq-e2MCX5
public final static int QUICK = 5; ezS@LFaA
public final static int IMPROVED_QUICK = 6; q&]I
public final static int MERGE = 7; t4X:I&l-M:
public final static int IMPROVED_MERGE = 8; 86y)+h`
public final static int HEAP = 9; eEl}.W}
?H3Ls~R
public static void sort(int[] data) { D;*P'%_Z
sort(data, IMPROVED_QUICK); L"e8S%UqX
} Po_y78ZD
private static String[] name={ `o4alK\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y- esD'MD
}; VB=$D|Ll
#6* j+SX^
private static Sort[] impl=new Sort[]{ %PW_v~sg
new InsertSort(), 2)cq!Zv
new BubbleSort(), 2SVBuV/R
new SelectionSort(), }M*yE]LL;Z
new ShellSort(), ZgarxV*
new QuickSort(), 3V2dN)\
new ImprovedQuickSort(), D;nm~O%
new MergeSort(), Okxuhzn>"
new ImprovedMergeSort(), F5s Pd
new HeapSort() X2\1OWR0
}; AYb-BaIc
a/p} ?!\
public static String toString(int algorithm){ }JPLhr|d^
return name[algorithm-1]; gn,D9d+
} &BxDS .
kMd1)6%6A
public static void sort(int[] data, int algorithm) { &&SA/;F
impl[algorithm-1].sort(data); RKru hF
} :k&R]bc9
5\S s`#g
public static interface Sort { hc#Sy:T>
public void sort(int[] data); &puPn:_
} Q &~|P}
' m^nKG$"
public static void swap(int[] data, int i, int j) { 9eR4?^(3!
int temp = data; M it3q
data = data[j]; b5!D('w>]
data[j] = temp; .! 'SG6 q
} MEKsL7
} VO u/9]a