[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; `V?NS,@$
} ")W5`9
int i1=l; =8DS~J{
int i2=mid+1; N2Cf(
for(int cur=l;cur<=r;cur++){ !Eb!y`jK
if(i1==mid+1) +^%0/0e
data[cur]=temp[i2++]; XZ|\|(6Cc
else if(i2>r) IZxr;\dq6
data[cur]=temp[i1++]; \Pd>$Q
else if(temp[i1] data[cur]=temp[i1++]; 7#9fcfL
else CW~c<,"
data[cur]=temp[i2++]; }`uq:y
} @DyMq3Gt?&
} t>"|~T$9
8ya|eJ]/L
} ?lIh&C8]X
1xsB@D
改进后的归并排序: 4& 9V
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package org.rut.util.algorithm.support; qn` \g
TZ PUVOtL_
import org.rut.util.algorithm.SortUtil; Y,X0x-
e:6mz\J
/** szy2"~hm
* @author treeroot Kp/l2?J"
* @since 2006-2-2 'Y>@t6E4
* @version 1.0 `(@{t:L
*/ ABhQ7 x|
public class ImprovedMergeSort implements SortUtil.Sort { p1,.f&(f
,h.hgyt
private static final int THRESHOLD = 10; Ewo6Q){X
gq)uv`3
/* R78lV-};Q
* (non-Javadoc) v0+$d\mP4<
* ,v(ikPzd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e{*z4q1
*/ iD:TKB_r
public void sort(int[] data) { 8{p#Nl?U1
int[] temp=new int[data.length]; }M9I]\
mergeSort(data,temp,0,data.length-1); HH^yruP\}
} r5uX?^mJ0
4I;$a;R!
private void mergeSort(int[] data, int[] temp, int l, int r) { E}|IU Pm
int i, j, k; UFr5'T
int mid = (l + r) / 2; vt}A6mF
if (l == r) }/F9(m
return; k i{8f
if ((mid - l) >= THRESHOLD) }yM!o`90
mergeSort(data, temp, l, mid); Z]^O=kX7k
else %eE 6\f%g
insertSort(data, l, mid - l + 1); D}bCMN<
if ((r - mid) > THRESHOLD) q_0,KOGW
mergeSort(data, temp, mid + 1, r); HO39>:c
else $eh>.c'&]
insertSort(data, mid + 1, r - mid); E^V4O l<
NKRH>2,
for (i = l; i <= mid; i++) { Br"K{g?
temp = data; 0u ,nSvch
} hu-6V="^9
for (j = 1; j <= r - mid; j++) { h) W|~y@
temp[r - j + 1] = data[j + mid]; lf2(h4[1R
} @86I|cY
int a = temp[l]; H`8}w{ft&
int b = temp[r]; rh6m
for (i = l, j = r, k = l; k <= r; k++) { _U%2J4T2
if (a < b) { +v|]RgyW)
data[k] = temp[i++]; ,a} vx"~
a = temp; /QVhT
} else { IL<@UWs6
data[k] = temp[j--]; bH_zWk
b = temp[j]; mbO.Kyfen
} RMBPm*H
} K=;oZYNd
} 9AZpvQ
Z~DR,:
/** }&IOBYHVDo
* @param data (hIy31Pf
* @param l 'E1m-kJz
* @param i jftf]n&Z(q
*/ u/X1v-2
private void insertSort(int[] data, int start, int len) { 0I[3%Q{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .T^e8
} T3^(I~03
} q!}O+(kt
} Y f;Slps
} l\~F0Z/O
i^&^eg'.5
堆排序： :<`po4/
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package org.rut.util.algorithm.support; ^es/xt
psE&Rx3)
import org.rut.util.algorithm.SortUtil; !"N-To-c
VAZ6;3@cd
/** k>72W/L^
* @author treeroot hdx"/.s
* @since 2006-2-2 kV+O|9
* @version 1.0 ,$;pLjo6
*/ :HDU\|{^
public class HeapSort implements SortUtil.Sort{ %jmL#IN)
>^%TY^7n
/* (non-Javadoc) i@STo7=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WhN~R[LE_
*/ @wOX</_g
public void sort(int[] data) { CqbPUcK
MaxHeap h=new MaxHeap(); OqA#4h4^
h.init(data); :LBRyBV
for(int i=0;i h.remove(); aak[U;rx
System.arraycopy(h.queue,1,data,0,data.length); tD\%SiTg=b
} RJT=K{2x
|fg{Fpc
private static class MaxHeap{ Tjza3M
8yn}|Y9Fu
void init(int[] data){ ^jZ4tH3K
this.queue=new int[data.length+1]; ekhx?rz
for(int i=0;i queue[++size]=data; X\'+);Z
fixUp(size); Kq2,J&Ca3
} cAc>p-y%
} <46fk*
V<G=pPC'H
private int size=0; U<mFwJ C]
x6B_5eF
private int[] queue; h[I~D`q)v
6$*ZH*
public int get() { v6`TbIq%
return queue[1]; w-9fskd6e
} ([L5i&DT
$oU40HA)W]
public void remove() { {9*k \d/;
SortUtil.swap(queue,1,size--); UFY_.N~
fixDown(1); 7Q3a0`Iq
} k874tD
file://fixdown x6={)tj
private void fixDown(int k) { tgB\;nbB
int j; ?:XbZ"25pJ
while ((j = k << 1) <= size) { "OO"Ab{t
if (j < size %26amp;%26amp; queue[j] j++; l9Sx'<
if (queue[k]>queue[j]) file://不用交换 $M 1/74
break; cq \()uF'c
SortUtil.swap(queue,j,k); p8a\> {
k = j; 1dahVc1W
} 2[R{IV8e
} _0(Bx?[h
private void fixUp(int k) { Pf?y!dK<
while (k > 1) { V8{5 y <Y>
int j = k >> 1; }hd:avze
if (queue[j]>queue[k]) QvN=<V
break; ?A7_&=J%
SortUtil.swap(queue,j,k); |T@\-8Ok
k = j; {(MC]]'?
} _.y0QkwV
} ^q=D!g
_@Le MNv
} {(,[
JD}"_,-
} l.Qv9Ll|b
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SortUtil： w0iv\yIRQ
HKZD*E((
package org.rut.util.algorithm; Z U^dLN-N
KixS)sG
import org.rut.util.algorithm.support.BubbleSort; r|>a;nY
import org.rut.util.algorithm.support.HeapSort; 2po>%Cp
import org.rut.util.algorithm.support.ImprovedMergeSort; 1^4z/<ZWm
import org.rut.util.algorithm.support.ImprovedQuickSort; N1O.U"L;
import org.rut.util.algorithm.support.InsertSort; ``p()^zT
import org.rut.util.algorithm.support.MergeSort; qvH7otA
import org.rut.util.algorithm.support.QuickSort; U*sQYt<?g
import org.rut.util.algorithm.support.SelectionSort; 9OnH3
import org.rut.util.algorithm.support.ShellSort; bijE]:<AE7
~@wM[}ThP$
/** ^ A`@g4!
* @author treeroot O8drR4Pt
* @since 2006-2-2 SuU_psF
* @version 1.0 `pzXh0}|
*/ rL/e
public class SortUtil { 8I`t`C/4
public final static int INSERT = 1; |3A/Og
public final static int BUBBLE = 2; a*Oc:$
public final static int SELECTION = 3; xF4>D!T%8
public final static int SHELL = 4; tgPx!5U
public final static int QUICK = 5; Y]SX2kk(2
public final static int IMPROVED_QUICK = 6; {:;599l
public final static int MERGE = 7; *$I5_A8,.
public final static int IMPROVED_MERGE = 8; = UT^5cl(
public final static int HEAP = 9; (ugB3o
c[~LI<>ic
public static void sort(int[] data) { }(/")i4h
sort(data, IMPROVED_QUICK); " tUS>c/
} Ikn)XZU^
private static String[] name={ %ur_DQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z`=[hu
}; gfPht 5
y.l`NTT]<
private static Sort[] impl=new Sort[]{ ^}gQh#
new InsertSort(), e /4{pe+,
new BubbleSort(), 9{;cp?\)M
new SelectionSort(), VQQtxHTC3
new ShellSort(), K38A;=t9
new QuickSort(), T7!"gJ
new ImprovedQuickSort(), PsLMV:O9S
new MergeSort(), v;q<h
new ImprovedMergeSort(), 8Q%rBl.
new HeapSort() J4-64t nZ
}; zdoJ+zRtK
JIl<4 %A
public static String toString(int algorithm){ *hP9d;-Ar
return name[algorithm-1]; %$)[qa3
} FM)Es&p&
-Tw96 dv
public static void sort(int[] data, int algorithm) { #Tjv(O[&
impl[algorithm-1].sort(data); %)Pn<! L
} [=63xPxs.
{q[l4_
public static interface Sort { `Eijy3>h
public void sort(int[] data); Tw!]N%E
} >0W:snNK
o<hT/ P
public static void swap(int[] data, int i, int j) { u7oHqo`
int temp = data; dsx'l0q 'i
data = data[j]; VZ`L-P$AF
data[j] = temp; YR2Q6}xR
} J5Nz<
} S+d@RMdes