[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; I@3Q=14k%
} 0Jm]f/iZ
int i1=l; Tjnt(5g
int i2=mid+1; hAV2F#
for(int cur=l;cur<=r;cur++){ P$p@5hl
if(i1==mid+1) tWpl`HH
data[cur]=temp[i2++]; m>]>$=%
else if(i2>r) eaV3)uP
data[cur]=temp[i1++]; Dk)@>l:gI,
else if(temp[i1] data[cur]=temp[i1++]; `fQM
else `t{D7I7
data[cur]=temp[i2++]; {E!$ xY8
} _:wZmZU}
} p>k]C:h
lZ}izl
} LQh^; ]^(
wqJ*%
改进后的归并排序: reJ"r<2
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package org.rut.util.algorithm.support; N=>- Q)
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import org.rut.util.algorithm.SortUtil; +?qf`p.{
y._'K+nl
/** sW;7m[o
* @author treeroot rs[?v*R74
* @since 2006-2-2 @4;HC=~
* @version 1.0 _FL<egK
*/ Q/9a,85
public class ImprovedMergeSort implements SortUtil.Sort { ^g9}f
/VRUz++K
private static final int THRESHOLD = 10; 3H1Pp*PH
J1.qhy>
/* *Y8XP8u/
* (non-Javadoc) jMK3T
* CXBzX:T?#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 48wDf_<f5=
*/ YV*b~6{d
public void sort(int[] data) { j._G7z/LJ
int[] temp=new int[data.length]; ;5<P|:^
mergeSort(data,temp,0,data.length-1); 0r1g$mKb
} -Bj.hx*
s>T`l
private void mergeSort(int[] data, int[] temp, int l, int r) { 1+R:3(AC
int i, j, k; Gu2_dT
int mid = (l + r) / 2; Y;8 >=0ye
if (l == r) V?=TVI*k
return; aw1P5aPmX
if ((mid - l) >= THRESHOLD) K6E}";;
mergeSort(data, temp, l, mid); !]yQ1@)*'
else rqF"QU=l
insertSort(data, l, mid - l + 1); .\$Wy$ d
if ((r - mid) > THRESHOLD) d&hD[v
mergeSort(data, temp, mid + 1, r); ;vMn/
else ]x2Jpk99a
insertSort(data, mid + 1, r - mid); ~NxEc8Y
l$M$o(
for (i = l; i <= mid; i++) { Hfke
temp = data; |Z d]=tue
} moCK-:
for (j = 1; j <= r - mid; j++) { m)r]F#@/
temp[r - j + 1] = data[j + mid]; Z+0?yQ=%
} QW2?n`Fa9-
int a = temp[l]; 26M~<Ic
int b = temp[r]; q&Q/?g>f
for (i = l, j = r, k = l; k <= r; k++) { ^b=XV&{q
if (a < b) { sD2 ^_w6j
data[k] = temp[i++]; (s088O
a = temp; [G\o+D?2
} else { l1}R2lSEO
data[k] = temp[j--]; N*f^Z#B]
b = temp[j]; Rxx>{+f4M
} L.kD,'G}>
} yOc|*O=]U
} Fqo&3+J4
d]MGN^%o
/** 90p3V\LO
* @param data i(0hvV>'
* @param l BH5w@
* @param i H"O$&
*/ '|&,E#`
private void insertSort(int[] data, int start, int len) { 8hZwQ[hr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q8/ihA6:
} ms7SoYbSu
} <^Nk.E
} R3?:\d{
} )i0 $j)R
U,HIB^= R
堆排序： lj*8mS/;h
X($6IL6m
package org.rut.util.algorithm.support; $~=2{
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import org.rut.util.algorithm.SortUtil; FRgLlp8x
{EL'd!v7e
/** v~}5u 5$O
* @author treeroot YwXXXh
* @since 2006-2-2 <PioQ>~
* @version 1.0 Q3,=~}ZNK
*/ 8[M* x3
public class HeapSort implements SortUtil.Sort{ tn{8u7
}'TTtV:Q
/* (non-Javadoc) Jh?z=JY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n26>>N
*/ 2A>C+Y[7\
public void sort(int[] data) { y^G>{?Tha
MaxHeap h=new MaxHeap(); o!utZmk$
h.init(data); 6|^0_6_
for(int i=0;i h.remove(); %9X{{_
System.arraycopy(h.queue,1,data,0,data.length); s@s/'^`
} \6:>{0\
2h<U
private static class MaxHeap{ y@`~9$
b_l3+'#ofM
void init(int[] data){ ESIzGaM
this.queue=new int[data.length+1]; U{}!y3[wK
for(int i=0;i queue[++size]=data; Af9+HI O
fixUp(size); "J!}3)n
} yb?{LL-uy
} uB;_vC
/[iG5~G
private int size=0; 69/?7r
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private int[] queue; t:=k)B
H_Os4}
public int get() { $/paEn"
return queue[1]; _88QgThb
} Y\p$SN
FsY(02
public void remove() { qg4fR' i
SortUtil.swap(queue,1,size--); 72,"Cj
fixDown(1); +T2HE\
} Qci$YTwl>
file://fixdown jTfi@5aPY
private void fixDown(int k) { o%`npi1y
int j; ik5|,#}m&
while ((j = k << 1) <= size) { LwOJ|jA(,
if (j < size %26amp;%26amp; queue[j] j++; > :Ze4}(
if (queue[k]>queue[j]) file://不用交换 `hzrfum4
break; ?PH/?QP
SortUtil.swap(queue,j,k); VFSz-<L
k = j; 5m7b\Mak
} QrC/ssf}
} k_?~<vTM
private void fixUp(int k) { ~@Kf2dHes
while (k > 1) { sofu
int j = k >> 1; kaQ2A
if (queue[j]>queue[k]) 9tk" :ld
break; .45^=2NGmQ
SortUtil.swap(queue,j,k); +j[`,5oS
k = j; :Q-oV8t{
} d0 -~|`5
} HH8;J66I&
etyCrQ ?U
} c@(1:,R
hH`Jb77L
} @o#+5P
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SortUtil： kXwi{P3D$
%LQ/q3?_
package org.rut.util.algorithm; n+;vjVS%
P+Z\3re
import org.rut.util.algorithm.support.BubbleSort; "- eZZEl(
import org.rut.util.algorithm.support.HeapSort; w!`Umll2
import org.rut.util.algorithm.support.ImprovedMergeSort; iYKU[UP?
import org.rut.util.algorithm.support.ImprovedQuickSort; `*yAiv>
import org.rut.util.algorithm.support.InsertSort; g19S
import org.rut.util.algorithm.support.MergeSort; #3 bv3m
import org.rut.util.algorithm.support.QuickSort; ArzDI{1
import org.rut.util.algorithm.support.SelectionSort; @B`Md3$7
import org.rut.util.algorithm.support.ShellSort; P^[/Qi}j
AmcC:5
/** Q\9K2=4
* @author treeroot \H4U8)l
* @since 2006-2-2 ~HmxEk9
* @version 1.0 O>V(cmqE`
*/ -@M3Dwsi3
public class SortUtil { 3.vgukkk5
public final static int INSERT = 1; GaBTj_3
public final static int BUBBLE = 2; VT=K"`EpQ
public final static int SELECTION = 3; MEq"}zrh
public final static int SHELL = 4; <m-.aK{9
public final static int QUICK = 5; Y"!uU.=xJ
public final static int IMPROVED_QUICK = 6; 7petHi
public final static int MERGE = 7; 4o5i ."l
public final static int IMPROVED_MERGE = 8; } `T8A
public final static int HEAP = 9; z[9UQU~x?
I:$"E% >=
public static void sort(int[] data) { *)>do L
sort(data, IMPROVED_QUICK); o| D^`Z
} <I2z&
private static String[] name={ 2dbRE:v5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2 9#]Vr
}; kNPDm6m
r{[OJc!
private static Sort[] impl=new Sort[]{ n &}s-`D
new InsertSort(), s[AA7>]3
new BubbleSort(), ^od<JD4
new SelectionSort(), K]fpGo
new ShellSort(), SDBt @=Nl
new QuickSort(), 8S U%
new ImprovedQuickSort(), KcXpH]>!9
new MergeSort(), FifbxL
new ImprovedMergeSort(), 5~r2sCDPk
new HeapSort() >I<PO.c!
}; [B9;?G
'MQ%)hipA
public static String toString(int algorithm){ GGnp Pp
return name[algorithm-1]; (V?@?25
} Do*n#=
\##5O7/1
public static void sort(int[] data, int algorithm) { >ttuum12w
impl[algorithm-1].sort(data); Acu@[I^
} yn~P{}68
j*zD0I]
public static interface Sort { q;A;H)?g
public void sort(int[] data); CMl~=[foW
} wss?|XCI
SUE ~rb
public static void swap(int[] data, int i, int j) { Q_O*oT(0
int temp = data; 4|Ui?.4=
data = data[j]; 9DE)S)e8
data[j] = temp; $1@,Qor
} Tbf:eVIG
} $j*Qo/xd