[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; NEK;'"~
} WlG/7$
int i1=l; Zb}=?fcL;@
int i2=mid+1; ~omX(kPzK
for(int cur=l;cur<=r;cur++){ Yz{UP)TC
if(i1==mid+1) R=PjLH&)
data[cur]=temp[i2++]; i%-c/ lop
else if(i2>r) AMtFOXx%I
data[cur]=temp[i1++]; 33 N5>}
else if(temp[i1] data[cur]=temp[i1++]; TNiFl hq
else HW{+THNj
data[cur]=temp[i2++]; BeP0lZ
} !f"@pR6
} GKm)wOb(*S
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} rsiG]o=8
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改进后的归并排序: od-N7lp#
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package org.rut.util.algorithm.support; ];(w8l
03{e[#6
import org.rut.util.algorithm.SortUtil; 6h;$^3x$
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/** ="Dmfy7
* @author treeroot n {^D_S
* @since 2006-2-2 ;2&(]1X
* @version 1.0 o2Z# 5-
*/ E#ti
public class ImprovedMergeSort implements SortUtil.Sort { X;zy1ZH
}X}fX#[
private static final int THRESHOLD = 10; ?;}2Z)
M|76,2u
/* =X>?Y,
* (non-Javadoc) BcA:M\dK%
* "z7.i{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wYS4#7
*/ T4w`I;&v
public void sort(int[] data) { ? NVN&zD]
int[] temp=new int[data.length]; pGUrYik4
mergeSort(data,temp,0,data.length-1); p?5`+Z
} E+[K?W5
=[vT=sHz7
private void mergeSort(int[] data, int[] temp, int l, int r) { Q- j+#NGc
int i, j, k; -,}f6*
int mid = (l + r) / 2; u'P@3'P
if (l == r) +FyG{1?<
return; .pG_j]
if ((mid - l) >= THRESHOLD) 2sWM(SN
mergeSort(data, temp, l, mid); 7pr@aA"vgj
else * 496"kU
insertSort(data, l, mid - l + 1); $40tAes9
if ((r - mid) > THRESHOLD) kg9ZSkJr
mergeSort(data, temp, mid + 1, r); |P~TZ
else aq[kKS`
insertSort(data, mid + 1, r - mid); |<9R%
F8/4PB8-
for (i = l; i <= mid; i++) { Q>= :$I
temp = data; 8"RX~Igf
} vvdC.4O
for (j = 1; j <= r - mid; j++) { W aks*^|
temp[r - j + 1] = data[j + mid]; :'a |cjq
} >L5[dkg%
int a = temp[l]; z l@ <X0q
int b = temp[r]; {n2jAR9nq
for (i = l, j = r, k = l; k <= r; k++) { |)yO]pB:
if (a < b) { ;/ WtO2
data[k] = temp[i++]; o{nBtxZ"
a = temp; aElEV e3
} else { T[&1cth
data[k] = temp[j--]; B-'Xk{
b = temp[j]; (t fADaJM
} -=2tKH`Q
} 0zdH6&
} |a/"7B|?\
+qDudGI
/** jSpmE
* @param data rS8/_'
* @param l H8rDG/>^
* @param i 8T7[/"hi\
*/ dk-Y!RfNx
private void insertSort(int[] data, int start, int len) { &F)P3=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WXaLKiA*(
} M)( 5S1ndq
} {N/(lB8
} zc\e$MO
} #tGW|F
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堆排序： `A3"*,|z
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package org.rut.util.algorithm.support; l]^uVOX
k G4v>
import org.rut.util.algorithm.SortUtil; Pr<.ld\
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/** ]Dd=q6
* @author treeroot 7;0^r#:87#
* @since 2006-2-2 Ryr2
* @version 1.0 /vBOf;L
*/ C.Y]PdYyj
public class HeapSort implements SortUtil.Sort{ FE" ksi 9
F@)wi0
/* (non-Javadoc) M7BJ$fA0E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nz\=M|@(#
*/ gb(a`
public void sort(int[] data) { 0a ZplE,
MaxHeap h=new MaxHeap(); ggXg4~WL
h.init(data); z3[ J>
for(int i=0;i h.remove(); |ILj}4ZA7
System.arraycopy(h.queue,1,data,0,data.length); $wub)^
} Nu<M~/
nV@k}IJg:?
private static class MaxHeap{ ezgP\ct
][I}yOD70
void init(int[] data){ dzKI?i)x
this.queue=new int[data.length+1]; 6"/cz~h
for(int i=0;i queue[++size]=data; [;
fixUp(size); ( Y'q%$
} `XE8[XY
} V80g+)|
:Bz*vH
private int size=0; ~K&ko8
iYEhrb
private int[] queue; -}AAA*P
PB(mUD2"r
public int get() { &k+jVymH
return queue[1]; {D={>0
} i<m1^a#C'
,73J#
public void remove() { Lf4c[[@%gd
SortUtil.swap(queue,1,size--); [z'PdYQR/{
fixDown(1); jO&sS?
} I'Ui` :A
file://fixdown -iLp3m<ai
private void fixDown(int k) { -hZlFAZi
int j; 9nu!|reS
while ((j = k << 1) <= size) { A9`& Wnw?
if (j < size %26amp;%26amp; queue[j] j++; 2"cUBFc1I
if (queue[k]>queue[j]) file://不用交换 @!1o +x
break; PJ5~,4H-4
SortUtil.swap(queue,j,k); vR[XbsNM
k = j; 'avzESe~'
} S%uwQ!=O8
} *9Ej fs7L
private void fixUp(int k) { ]+@@{?0
while (k > 1) { VJ8cls<
int j = k >> 1; s{#rCc)
if (queue[j]>queue[k]) P+tRxpz
break; JPJ&k(P
SortUtil.swap(queue,j,k); IH(]RHTp%
k = j; Ha>Hb`
} nd_+g2x'
} _r@ FWUZ
v0+mh]
} ,l+lokD-#
7jPPN
} #;4<dDVy
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SortUtil： [CTE"@A
2#%@j6
package org.rut.util.algorithm; >1q W*
'M8wjU
import org.rut.util.algorithm.support.BubbleSort; xn|M]E1)
import org.rut.util.algorithm.support.HeapSort; "ld4v+o8l
import org.rut.util.algorithm.support.ImprovedMergeSort; 9ozN$:
import org.rut.util.algorithm.support.ImprovedQuickSort; G0*>S`:4
import org.rut.util.algorithm.support.InsertSort; |h}/#qhR
import org.rut.util.algorithm.support.MergeSort; .dM4B'OA?
import org.rut.util.algorithm.support.QuickSort; rWsUWA T*
import org.rut.util.algorithm.support.SelectionSort; 1-JdQs6
import org.rut.util.algorithm.support.ShellSort; %P@V7n
*|n-Hr
/** !:"$1kh1("
* @author treeroot WD.td
* @since 2006-2-2 hilgl<UF
* @version 1.0 c~ x
*/ jiw5>RNt
public class SortUtil { moz*=a
public final static int INSERT = 1; !(2rU@.
public final static int BUBBLE = 2; PggjuPPh
public final static int SELECTION = 3; [[ {L#
public final static int SHELL = 4; t,H=;U#
public final static int QUICK = 5; jMFLd
public final static int IMPROVED_QUICK = 6; G)5R iRcs
public final static int MERGE = 7; sKDsps^$
public final static int IMPROVED_MERGE = 8; LkvR]^u0
public final static int HEAP = 9; &/wd_;d^A
Dfz3\|LJ
public static void sort(int[] data) { /<zBjvr%%
sort(data, IMPROVED_QUICK); eI99itDQ
} A:Y ([
private static String[] name={ XM?>#^nC?u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P?WS=w*O0
}; .t53+<A
-(~OzRfYi
private static Sort[] impl=new Sort[]{ %)'# d
new InsertSort(), y(81| c#
new BubbleSort(), b~oQhU??"
new SelectionSort(), ZDn5d%
new ShellSort(), ^/c v8M=
new QuickSort(), aUZh_<@
new ImprovedQuickSort(), iG+hj:5
new MergeSort(), k9Pwf"m|](
new ImprovedMergeSort(), gs/ i%O
new HeapSort() Vd%%lv{v
}; ~F; ~
dbVMG-z8
public static String toString(int algorithm){ ou V%*<Ki
return name[algorithm-1]; B=!&rKF
} <?8aM7W7
z.d1>w
public static void sort(int[] data, int algorithm) { gdr"34%vbM
impl[algorithm-1].sort(data); ;-]' OiS;
} )SjhOvm
-2DvKW$
public static interface Sort { +wPXDN#R
public void sort(int[] data); ;zF3e&e(
} VAD9mS^~
yq7gBkS
public static void swap(int[] data, int i, int j) { ~(v7:?
int temp = data; ZsnFuk#W
data = data[j]; ^mp#7OL
data[j] = temp; kMS&"/z
} M_BG:P5
} rg5ZxN|g