[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&? 78+:
} G=+!d&mbg
int i1=l; pRb+'v&_k
int i2=mid+1; )L&n)w
for(int cur=l;cur<=r;cur++){ (Qw`%B
if(i1==mid+1) [0( E>vm
data[cur]=temp[i2++]; je$R\7B<
else if(i2>r) c=uBT K*
data[cur]=temp[i1++]; d7n4zx1Hh
else if(temp[i1] data[cur]=temp[i1++]; @8}-0c
else g%KGF)+H
data[cur]=temp[i2++]; S.?\>iH[
} Iltg0`
} Oa3=+_C~$1
-X6\[I:+A
} ?3KR(6D
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改进后的归并排序: e{#a{`?Uez
519:yt
package org.rut.util.algorithm.support; fTi{oY,zTg
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import org.rut.util.algorithm.SortUtil; <LOx.}fv
LgD{!
/** {O3oUE+
* @author treeroot 6#lC(ko'
* @since 2006-2-2 Q'%5"&XFD
* @version 1.0 ,EGD8$RA]
*/ FsPDWy&x
public class ImprovedMergeSort implements SortUtil.Sort { ?GD?J(S
]38<ly7
private static final int THRESHOLD = 10; 8UY=}R2C
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/* kI[O{<kQ
* (non-Javadoc) }.|5S+J?[
* m-KK {{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i,b7Ft:F&
*/ q?]@' ^:;
public void sort(int[] data) { f/WM}Hpj
int[] temp=new int[data.length]; 5\kZgXWIh
mergeSort(data,temp,0,data.length-1); s2v#evI`+
} Kac j
a):Run
private void mergeSort(int[] data, int[] temp, int l, int r) { ,m'#>d&zO
int i, j, k; zam0(^=
int mid = (l + r) / 2; :AcNb
if (l == r) /$.vHt5nt
return; \t(r@qq
if ((mid - l) >= THRESHOLD) hv8[_p`>
mergeSort(data, temp, l, mid); {$TB#=G
else .yh2ttf<gB
insertSort(data, l, mid - l + 1); }br<2?y,
if ((r - mid) > THRESHOLD) 88=FPEU
mergeSort(data, temp, mid + 1, r); cyP*QW[
else yc4f\0B/
insertSort(data, mid + 1, r - mid); h/bYtE
gsq[ 9
for (i = l; i <= mid; i++) { h _7;UQH
temp = data; y!c7y]9__2
} a1sLRqo8
for (j = 1; j <= r - mid; j++) { ]}L1W`n
temp[r - j + 1] = data[j + mid]; Tvw2py q
} Dt'e<d Is
int a = temp[l]; mb`}sTU).
int b = temp[r]; `ip69 IF2*
for (i = l, j = r, k = l; k <= r; k++) { kQ'xs%Fw
if (a < b) { R/xCS.yl}
data[k] = temp[i++]; 19{?w6G<k
a = temp; Wv/5#_
} else { e[&3K<
data[k] = temp[j--]; G.ARu-2's
b = temp[j]; X.Y)'qSf
} `rJ ~*7-
} He;%6OG{
} R:m=HS_
Guc^gq}
/** v") W@haU
* @param data >ZsK5v
* @param l /[dAgxL
* @param i DOU?e9I2
*/ 19`0)pzZ*P
private void insertSort(int[] data, int start, int len) { rX}==`#\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vrx3O
} ?|YQtY
} o*1`,n
} ;|,Y2?
} 4c@F.I
w~?eX/;
堆排序： TL:RB)- <
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package org.rut.util.algorithm.support; *heQ@ww
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import org.rut.util.algorithm.SortUtil; HhH'\-[t
:e vc
/** qiJ{X{lI
* @author treeroot %=eD)p7l-
* @since 2006-2-2 HjR<4;2
* @version 1.0 M_I\:Q
*/ >9|+F[Fc
public class HeapSort implements SortUtil.Sort{ 9DKB+K.1
8}@a?QS(&
/* (non-Javadoc) J/2pS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e 3oIoj4o
*/ "S#hzrEdYI
public void sort(int[] data) { {u3u%^E;R
MaxHeap h=new MaxHeap(); +=$G6uR$
h.init(data); e|y~q0Q$
for(int i=0;i h.remove(); #oY7v,x\
System.arraycopy(h.queue,1,data,0,data.length); 1Xc%%j
} 'J$NW
t/(j8w
private static class MaxHeap{ bc-}Qn
n_glYSV!
void init(int[] data){ m!(K
this.queue=new int[data.length+1]; 0[Aa2H*
for(int i=0;i queue[++size]=data; vj0?b/5m
fixUp(size); inrL'z
} ]uf_"D
} j]^]p;An
[%:NR
private int size=0; Ccmbdw,Z5
=h{2!Ah7 X
private int[] queue; dGjvSK<1@
)G&OX
public int get() { qsx1:Ny1
return queue[1]; yD"sYT
} RR|Eqm3)
TmiQq'm[b
public void remove() { o}z}79Z
SortUtil.swap(queue,1,size--); ]W,g>91m
fixDown(1); Fy^\Uw
} xm5D$m3#
file://fixdown &-A7%"
private void fixDown(int k) { Z(P#]jI]
int j; P@#6.Bb#V
while ((j = k << 1) <= size) { xB#E&}Ho
if (j < size %26amp;%26amp; queue[j] j++; ^y,ip=<5\3
if (queue[k]>queue[j]) file://不用交换 Mv3Ch'X[
break; \8!HZei
SortUtil.swap(queue,j,k); >Ko )Z&j9W
k = j; D~}4N1
} sh1fz 6g
} |%}?*|-
private void fixUp(int k) { L~~aW0,
while (k > 1) { PhQD}|S
int j = k >> 1; Yu=^`I
if (queue[j]>queue[k]) TH-^tw
break; $O#h4L_
SortUtil.swap(queue,j,k); {)M4h?.2
k = j; Velmq'n
} '"EOLr\Z,
} /zWWUl`:
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} iX28+weH
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} {SJLM0=Z
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SortUtil： ?cJ$=
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package org.rut.util.algorithm; M\%{!Wzo8
>Et?7@
import org.rut.util.algorithm.support.BubbleSort; &P;x<7h$t?
import org.rut.util.algorithm.support.HeapSort; ra3WLK
import org.rut.util.algorithm.support.ImprovedMergeSort; qrdI"
import org.rut.util.algorithm.support.ImprovedQuickSort; gDv]n^&
import org.rut.util.algorithm.support.InsertSort; :/3`+&T^/
import org.rut.util.algorithm.support.MergeSort; AYi$LsLhO
import org.rut.util.algorithm.support.QuickSort; ;Cwn1N9S
import org.rut.util.algorithm.support.SelectionSort; IO+z:D{
import org.rut.util.algorithm.support.ShellSort; E*%{Nn
><=af 9T
/** ru&RL HFV
* @author treeroot gR+Z"]
* @since 2006-2-2 -'nx7wnj2
* @version 1.0 `XnFc*L 1
*/ U{x'@/Ld
public class SortUtil { H\^^p!^)
public final static int INSERT = 1; Q -+jG7vT
public final static int BUBBLE = 2; `'93J wYb
public final static int SELECTION = 3; fkYQ3d,`
public final static int SHELL = 4; IH0Uq_
public final static int QUICK = 5; FR <wp
public final static int IMPROVED_QUICK = 6; &.}zZ/
public final static int MERGE = 7; M]W4S4&Y=
public final static int IMPROVED_MERGE = 8; 'fB`e]_
public final static int HEAP = 9; BK +JHT
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public static void sort(int[] data) { 8177x7UG2[
sort(data, IMPROVED_QUICK); L]VK9qB
} RHxd6Gs"
private static String[] name={ vH=I#Ajar
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =:b/z1-v
}; RsbrD8*AD
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private static Sort[] impl=new Sort[]{ H$;\TG@,
new InsertSort(), q"Xls(
new BubbleSort(), /; _"A)0
new SelectionSort(), QK72F
new ShellSort(), njIvVs`q
new QuickSort(), 5t PmrWZ
new ImprovedQuickSort(), 7}*5Mir p
new MergeSort(), j04Q3d \f
new ImprovedMergeSort(), us]ah~U6A
new HeapSort() Kb}N!<Z*
}; Q.N^1?(>k
X2{3I\'Ft
public static String toString(int algorithm){ <ZocMv9gM
return name[algorithm-1]; xW09k6
} xS.0u"[
f ZISwr
public static void sort(int[] data, int algorithm) { bNC1[GG[
impl[algorithm-1].sort(data); .1}u0IbJ
} HiWZ?G
+EFurdX\
public static interface Sort { _x lgsa
public void sort(int[] data); .-r 1.'.A
} gt ?&!S^
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public static void swap(int[] data, int i, int j) { \&cVcAg
int temp = data; H'Po
data = data[j]; iX,Qh2(ig
data[j] = temp; Cjd +\7#G
} !ine|NM
} I5e!vCG)