[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; }`MO}Pz
} o?b%L
int i1=l; ;T_9;RU<'b
int i2=mid+1; AH7k|6ku<*
for(int cur=l;cur<=r;cur++){ h)<R#xw
if(i1==mid+1) )ld7^G
data[cur]=temp[i2++]; %/^d]#
else if(i2>r) 3jI.!xD`
data[cur]=temp[i1++]; iM9563v
else if(temp[i1] data[cur]=temp[i1++]; V\G>e{
else A]J^{h0k
data[cur]=temp[i2++]; =CVw0'yZ
} ko:I.6-K
} uVk8KMYU
\ bhok
} Q0--.Q=:Y
~FsUK;?
改进后的归并排序: ew"Fr1UGYZ
7&QVw(:)M
package org.rut.util.algorithm.support; oby*.61?5l
;?[~]"
import org.rut.util.algorithm.SortUtil; n (|>7
5{5ABV
/** x'KsQlI/
* @author treeroot M ?3N
* @since 2006-2-2 kzmt'/L8
* @version 1.0 6,7omYof
*/ U=t'>;(g
public class ImprovedMergeSort implements SortUtil.Sort { VsmL#@E
.( J/*H
private static final int THRESHOLD = 10; 3K{8sFDO
g}D$`Nx:
/* K@i*Nl
* (non-Javadoc) BmM,vllO
* 7^iAc6QSy3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xL BG}C
*/ |")x1'M
public void sort(int[] data) { `u}x:f !
int[] temp=new int[data.length]; \1Bgs^
mergeSort(data,temp,0,data.length-1); $W?XxgkB?
} Y/^<t'o&
w* I+~o-
private void mergeSort(int[] data, int[] temp, int l, int r) { c]]F`B
int i, j, k; ZX0c_Mk=
int mid = (l + r) / 2; j{^(TE
if (l == r) 3dbf!
return; VZ,T`8"
if ((mid - l) >= THRESHOLD) gfYB|VyWo
mergeSort(data, temp, l, mid); 3/AUV%+
else .$k"+E
insertSort(data, l, mid - l + 1); v<SEGv-
if ((r - mid) > THRESHOLD) IBqY$K+l
mergeSort(data, temp, mid + 1, r); :qbG%_PJ
else 'l:2R,cP
insertSort(data, mid + 1, r - mid); J4vKfxEg
!BX62j\?
for (i = l; i <= mid; i++) { f+920/>!Z
temp = data; R\}YD*
} M BT-L
for (j = 1; j <= r - mid; j++) { ^55?VQB
temp[r - j + 1] = data[j + mid]; |FFC8R%@]u
} 6ZR0_v;TD
int a = temp[l]; Wy4^mOv
int b = temp[r]; >S!DIL
for (i = l, j = r, k = l; k <= r; k++) { k~R[5W|'
if (a < b) { =F&RQ}$
data[k] = temp[i++]; /RM-+D:Y
a = temp; 78)^vvn5~
} else { k~#|8eLv
data[k] = temp[j--]; Q8x{V_Pot
b = temp[j]; K5>:WiY
} @QG1\W'
} `k&K"jA7$
} l:eNu}{&
KV_Ga8hs
/** @"8QG^q8de
* @param data DKl7|zG4
* @param l }/spo3,6
* @param i J7GsNFL
*/ fYy.>m+P1
private void insertSort(int[] data, int start, int len) { ^0Q*o1W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yxN!*~BvL
} \zU5G#LQ
} ?U08A{ c
} 1VFqT'
} .@Uz/j?>
[MS.5+1Y
堆排序： !j9i=YDb
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package org.rut.util.algorithm.support; gN(hv.nQ
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import org.rut.util.algorithm.SortUtil; 05B+WJ1
m;f?}z_\$
/** ts<dUO
* @author treeroot "6yiQ\`J
* @since 2006-2-2 Td*Oljj._U
* @version 1.0 bFezTl{M
*/ 5V~p@vCx
public class HeapSort implements SortUtil.Sort{ 6# ";W2
h&bV!M
/* (non-Javadoc) ]Rh(=bg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9M]"%E!s
*/ W_\L_)^X
public void sort(int[] data) { ~C'nBV
MaxHeap h=new MaxHeap(); FH8mK)
h.init(data); k{jw%a<Sc
for(int i=0;i h.remove(); cl{W]4*$
System.arraycopy(h.queue,1,data,0,data.length); k_<{j0z.
} X3{1DY3@u
~[TKVjyO
private static class MaxHeap{ *"FLkC4
2?iOB6
void init(int[] data){ _M[[vXH
this.queue=new int[data.length+1]; zL'IN)7MU
for(int i=0;i queue[++size]=data; %D(prA_w
fixUp(size); ;&6PL]/d
} ;-pvc<_c<
} wp.e3l
qYZ7Zt;
private int size=0; Q5nyD/k4c
3D{4vMmX
private int[] queue; ^:DhHqvK
Pmlgh&Z
public int get() { gvqd1?0w
return queue[1]; v\(m"|4(i
} C'/M/|=Q#
_SC
public void remove() { ?vn 0%e868
SortUtil.swap(queue,1,size--); 1{x~iZa
fixDown(1); ZT"|o\G^Q
} 7. 9s.*
file://fixdown ynZ[c8.
private void fixDown(int k) { b+].Uc
int j; eH%L?"J~:
while ((j = k << 1) <= size) { ?lDcaI>+n
if (j < size %26amp;%26amp; queue[j] j++; S~Iw?SK3
if (queue[k]>queue[j]) file://不用交换 ^[}0&_L w
break; w2N3+Tkg
SortUtil.swap(queue,j,k); >xV<nLf/
k = j; &rztC]jF
} iW1ih QX
} 8;g.3Qv
private void fixUp(int k) { e=o{Zo?H=
while (k > 1) { mERrcYY{
int j = k >> 1; x56 F
if (queue[j]>queue[k]) e9@fQ
break; j%Z{.>mJ
SortUtil.swap(queue,j,k); !N8)C@=
k = j; #VdI{IbW
} M=[q+A
} s i"`
]Uu(OI<)
} fE%[j?[
w$lfR,
} s>@#9psm
2Cd --W+=
SortUtil： LlA`QLe
rw8J:?0x
package org.rut.util.algorithm; nN=:#4 >Y
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import org.rut.util.algorithm.support.BubbleSort; >!Ap/{2
import org.rut.util.algorithm.support.HeapSort; nKjeH@&#
import org.rut.util.algorithm.support.ImprovedMergeSort; \gp,Txueb
import org.rut.util.algorithm.support.ImprovedQuickSort; AO}i@YJth
import org.rut.util.algorithm.support.InsertSort; _Hd1sx
import org.rut.util.algorithm.support.MergeSort; A_jB|<bjTP
import org.rut.util.algorithm.support.QuickSort; sO6gIPU^
import org.rut.util.algorithm.support.SelectionSort; -[=AlqL
import org.rut.util.algorithm.support.ShellSort; AZy~Q9Kc
&AQ;ze
/** 9IvcKzS2
* @author treeroot RZd4(7H=q
* @since 2006-2-2 7"n1it[RJ8
* @version 1.0 Lk`k>Nn)
*/ W?^8/1U
public class SortUtil { qXB03}] G
public final static int INSERT = 1; ? gA=39[j
public final static int BUBBLE = 2; *]m kyAhi
public final static int SELECTION = 3; uZ/7t(fy
public final static int SHELL = 4; (Gi+7GMV'
public final static int QUICK = 5; g\qL}:
public final static int IMPROVED_QUICK = 6; n=G>y7b
public final static int MERGE = 7; BK(pJNBh
public final static int IMPROVED_MERGE = 8; c3zT(FgO>N
public final static int HEAP = 9; xS~yH[k
mI7rx`4H
public static void sort(int[] data) { =nvAOvP{?
sort(data, IMPROVED_QUICK); *>GIk`!wM
} S:p.W=TAB
private static String[] name={ q: Bt]2x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" //X e*0
}; E+m]aYu"
9B+ zJ Vte
private static Sort[] impl=new Sort[]{ V#zhGAMy.
new InsertSort(), kJurUDo
new BubbleSort(), { OxAY_
new SelectionSort(), jMf 7J
new ShellSort(), a(}VA|l
new QuickSort(), +q #Xy0u
new ImprovedQuickSort(), GP{$v:RG
new MergeSort(), "rjv5*z^&
new ImprovedMergeSort(), Et}C`vZ+Ve
new HeapSort() ,5eH2W
}; (:.Q\!aZ1
23}BW_m
public static String toString(int algorithm){ }\`(m\2xo
return name[algorithm-1]; POqRHuFq
} u=@h`5-fp
~T>jBYI0
public static void sort(int[] data, int algorithm) { z*M}=`M$
impl[algorithm-1].sort(data); :]B% >*;}
} P"R97#C
_.d}lK3$2
public static interface Sort { \3H<z@;
public void sort(int[] data); NJ|NJp&0
} H _Zo@y~J
'a;ini
public static void swap(int[] data, int i, int j) { di3 B=A>3
int temp = data; ;[TljcbS
data = data[j]; 943I:, B
data[j] = temp; L4YVH2`0)
} ="3a%\
} (orrX Ez