[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; p<=(GY-
} L$29L:
int i1=l; $(@o$%d
int i2=mid+1; "?.'{,Q
for(int cur=l;cur<=r;cur++){ 7b&JX'`Mb
if(i1==mid+1) #+K Kvk
data[cur]=temp[i2++]; )D["M$ZA^
else if(i2>r) af<NMgT2s~
data[cur]=temp[i1++]; AXl!cgi
else if(temp[i1] data[cur]=temp[i1++]; j{{~ZM
else t['k%c
data[cur]=temp[i2++]; 'dIX=/RZ
} v[{8G^Z}54
} >d8x<|D
b^[W_y
} *L%6qxl`V
M5GY>3P$c
改进后的归并排序: f0uUbJ5
eVw\v#gd
package org.rut.util.algorithm.support; [j)\v^m
]#Vo}CVP
import org.rut.util.algorithm.SortUtil; +Lm3vj_N
lAdDu
/** 1B)Y;hg6&
* @author treeroot TL},Unq
* @since 2006-2-2 PIZ C;K4|
* @version 1.0 &1z)fD2
*/ M}Nb|V09
public class ImprovedMergeSort implements SortUtil.Sort { $!YKZ0)B'0
0'?V|V=v
private static final int THRESHOLD = 10; 7FmbV/&c
qwq/Xcv
/* iNod</+"K
* (non-Javadoc) .FIt.XPzv
* omM&{ }8g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) op hH9D
*/ f._l105.
public void sort(int[] data) { uiktdZ/f
int[] temp=new int[data.length]; P?9nTG
mergeSort(data,temp,0,data.length-1); u0m5JD0/
} $%7I:
dB@Wn!Y
private void mergeSort(int[] data, int[] temp, int l, int r) { m#oh?@0}
int i, j, k; )W&o?VRfO
int mid = (l + r) / 2; xGYSi5}z
if (l == r) EY+/.=$x
return; XR*Q|4
if ((mid - l) >= THRESHOLD) QS3U)ZO$@
mergeSort(data, temp, l, mid); ]43alf F#
else uYFMv=>j
insertSort(data, l, mid - l + 1); %1Bn_
if ((r - mid) > THRESHOLD) [Q4_WKI0T
mergeSort(data, temp, mid + 1, r); wYZT D*A2h
else C=fsJ=a5;
insertSort(data, mid + 1, r - mid); )^4ko
3gb|x?
for (i = l; i <= mid; i++) { J+Q+&-a
temp = data; P!kw;x
} \Sg<='/{L;
for (j = 1; j <= r - mid; j++) { q=|R89
temp[r - j + 1] = data[j + mid]; H@V 7!d
} sK+ (v
int a = temp[l]; *_`76`cz%X
int b = temp[r]; &^V~cJ
for (i = l, j = r, k = l; k <= r; k++) { _i5mC,OffN
if (a < b) { U?gl"6x
data[k] = temp[i++]; yJ%t^ X_
a = temp; <&4nOt
} else { 9|' |BC
data[k] = temp[j--]; >; aCf#q
b = temp[j]; |#{-.r6Y]
} EQ4#fAM)
} G+0><,S
} 9]"S:{KSCn
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/** v @:~mwy
* @param data 94\t1fE
* @param l 2ck4C/ h
* @param i pX@Si3G`
*/ m23+kj)+VY
private void insertSort(int[] data, int start, int len) { g3Z:{@m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ck: 9gn
} pgT9hle/
} m9Ax\lf
} OFA{ KZga
} 3P1&;
~ |6dH
堆排序： P` #QGZ>
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package org.rut.util.algorithm.support; r#A_RZ2~@
7KU~(?|:h
import org.rut.util.algorithm.SortUtil; 7c-Gm R2
iZaeoy
/** g?B3!,!9
* @author treeroot MU'@2c
* @since 2006-2-2 zF8'i=b&
* @version 1.0 PocYFhWQ`
*/ qD#VbvRc9+
public class HeapSort implements SortUtil.Sort{ bp#:UUO%S
2R]&v;A
/* (non-Javadoc) J{`eLmTu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !22yvT.;[
*/ SyO79e*t
public void sort(int[] data) { 6xoq;=o
MaxHeap h=new MaxHeap(); 'n0 .#E_
h.init(data); d6`OXTD
for(int i=0;i h.remove(); 3\AM=`
System.arraycopy(h.queue,1,data,0,data.length); .e@>
} LOr|k8tL%
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private static class MaxHeap{ 3o*FPO7?
ZU^IH9
void init(int[] data){ I^D0<lHl~
this.queue=new int[data.length+1]; w1r$='*I
for(int i=0;i queue[++size]=data; 'CXRG$D
fixUp(size); %K(0W8&
} 1j0-9Kg'
} z>;$im
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private int size=0; Gih[i\%Q
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private int[] queue; mf' ]O,
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public int get() { MAqLIf<G
return queue[1]; QV qK
} QK; T~ _k
0)|Q6*E>
public void remove() { w%dL8k
SortUtil.swap(queue,1,size--); PmR*}Aw
fixDown(1); Ri#H.T<'
} B@O@1?c[
file://fixdown at6149B\)
private void fixDown(int k) { #`;/KNp 9
int j; WZZ4]cC
while ((j = k << 1) <= size) { 1zftrX~v!X
if (j < size %26amp;%26amp; queue[j] j++; ~9=aT1S|
if (queue[k]>queue[j]) file://不用交换 +Llo81j&
break; 0:&ZnE}##
SortUtil.swap(queue,j,k); ~GJN@ka4%
k = j; ?m0IehI
} [u M-0t
} v>A=2i*j
private void fixUp(int k) { 4 o(bxs"
while (k > 1) { Q7gY3flg
int j = k >> 1; 9!U@"~yB
if (queue[j]>queue[k]) -?6MU~"GK
break; GX&b;N
SortUtil.swap(queue,j,k); U47}QDh
k = j; vyI%3+N@
} ,RxYd6
} pFsc}R/0/8
ir16
} (*\jbK
Vp}^NNYf
} &v!WVa?
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SortUtil： wGsRS[
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package org.rut.util.algorithm; Ad$n4Ze
is?2DcSl5
import org.rut.util.algorithm.support.BubbleSort; pS[KBQ"F
import org.rut.util.algorithm.support.HeapSort; {/<6v. v
import org.rut.util.algorithm.support.ImprovedMergeSort; 7=XL!:P
import org.rut.util.algorithm.support.ImprovedQuickSort; %7hB&[ 5
import org.rut.util.algorithm.support.InsertSort; `^9(Ot $
import org.rut.util.algorithm.support.MergeSort; xJs;v
import org.rut.util.algorithm.support.QuickSort; q<#>HjC
import org.rut.util.algorithm.support.SelectionSort; vuQ%dDxI
import org.rut.util.algorithm.support.ShellSort; -e u]:4
wnLi2k/Dt<
/** !? 5U|
* @author treeroot sZ&G%o
* @since 2006-2-2 %\$;(#h
* @version 1.0 1w(JEqY3h:
*/ }/P5>F<H[
public class SortUtil { B;K`q
public final static int INSERT = 1; IJIzXU
public final static int BUBBLE = 2; 8}e,%{q
public final static int SELECTION = 3; ul f2vD
public final static int SHELL = 4; 6t'l(E +
public final static int QUICK = 5; f~{}zGTM:
public final static int IMPROVED_QUICK = 6; cbYLU\!
public final static int MERGE = 7; 9#d+RT
public final static int IMPROVED_MERGE = 8; VOTv?Vf
public final static int HEAP = 9; 7OCwG~_^
;Xvp6.:
public static void sort(int[] data) { _c$9eAe
sort(data, IMPROVED_QUICK); '1^B+m
} 3jH\yXj
private static String[] name={ k n[Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;a{:%t
}; Ez~'^s@
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private static Sort[] impl=new Sort[]{ RP5+d
new InsertSort(), gk[{2HgN
new BubbleSort(), VdSv
new SelectionSort(), <"D=6jqZ
new ShellSort(), P^`duZ{T
new QuickSort(), -u!FOD/
new ImprovedQuickSort(), `1OgYs
new MergeSort(), 2lKV#9"
new ImprovedMergeSort(), ?E%ELs_Dl
new HeapSort() R"MRnr_4K
}; iJ' xh n
jw}}^3.
public static String toString(int algorithm){ ph>7?3;t
return name[algorithm-1]; JO<wK
} "P-lSF?T
@H>@[+S#
public static void sort(int[] data, int algorithm) { K_?W\Yg
impl[algorithm-1].sort(data); klgy;jSEr
} !+)AeDc:j
cRd0S*QN2
public static interface Sort { G$0c'9d*(
public void sort(int[] data); ,j:|w+l
} v[plT2"s
mGUO6>g
public static void swap(int[] data, int i, int j) { OA/WtQ5
int temp = data; |tR OL9b
data = data[j]; v:Tzv^
data[j] = temp; U7uKRv9
} vx_o(wof
} 4'4\,o