[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; oagxTFh8~
} 9x/HQ(1
int i1=l; 9FT;?~,
int i2=mid+1; cB U,!
for(int cur=l;cur<=r;cur++){ XSkN9LqZ
if(i1==mid+1) e%w>QN`
data[cur]=temp[i2++]; C2;qSKG3{m
else if(i2>r) 7@u0;5p|
data[cur]=temp[i1++]; {O,D9<
else if(temp[i1] data[cur]=temp[i1++]; >OVi{NyT
else )cnB>Qul
data[cur]=temp[i2++]; $d M: 5y
} 6LRI~*F=3
} &B\tcF
7pDov@K<{
} L;=:OX0
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改进后的归并排序: sw{,l"]<
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package org.rut.util.algorithm.support; h4x*C=?A
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import org.rut.util.algorithm.SortUtil; z5PFppSQ
TQDb\d8,f
/** _4iTP$7[
* @author treeroot ;hi+.ng_
* @since 2006-2-2 W8j)2nKD
* @version 1.0 6k"'3AKaR
*/ _IJPZ'Hr
public class ImprovedMergeSort implements SortUtil.Sort { Ym+k \h
@EH:4~
private static final int THRESHOLD = 10; '+1<7jl&I
{7&(2Z]z
/* (#FWA<o
* (non-Javadoc) }R:e[lKj
* !4cR&@[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8`Fo^c=j
*/ Z.+-MNWV
public void sort(int[] data) { ; mF-y,E
int[] temp=new int[data.length]; DytH} U"
mergeSort(data,temp,0,data.length-1); )Q\nR`k
} pOQ'k>!
vwDnz/-
private void mergeSort(int[] data, int[] temp, int l, int r) { i8pM,Ppi~
int i, j, k; rH7|r\]r
int mid = (l + r) / 2; '"LrGvkZ
if (l == r) UA$ XjP
return; @ROMHMd}
if ((mid - l) >= THRESHOLD) .C(Ir
mergeSort(data, temp, l, mid); GFasGHAw
else %7 h_D
insertSort(data, l, mid - l + 1); CrC1&F\dq
if ((r - mid) > THRESHOLD) ,<n >g;
mergeSort(data, temp, mid + 1, r); z?`&HU Nf
else _2+}_ >d
insertSort(data, mid + 1, r - mid); O_aZ\28};C
]kA0C~4
for (i = l; i <= mid; i++) { %[0V>
temp = data; pUx~
} tr0P;}=
for (j = 1; j <= r - mid; j++) { rlr)n\R#
temp[r - j + 1] = data[j + mid]; p x1y#Q
} ;n_|t/=
int a = temp[l]; )$K )`uqb
int b = temp[r]; hI*gw3V
for (i = l, j = r, k = l; k <= r; k++) { 8 hx4N
if (a < b) { NXsDn&&O
data[k] = temp[i++]; i:W.,w%8
a = temp; 0A\OZ^P8
} else { P F#+G;q;
data[k] = temp[j--]; qeLfO
b = temp[j]; ~pA_E!3W
} j\& `
} <?'d\B
} 8o43J;mA
d2sY.L
/** ZaJg$
* @param data Qa@b-v'by
* @param l $qG;^1$
* @param i y<(q<V#0!S
*/ 'fO[f}oa_.
private void insertSort(int[] data, int start, int len) { "L^]a$&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |PR8P!'
} &}:'YK*X
} sy`@q<h(
} 21'I-j
} vAWJP_;J
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堆排序： I3`WY-uv
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package org.rut.util.algorithm.support; ;hb;%<xqT
o1C1F}gxU
import org.rut.util.algorithm.SortUtil; 6'CZfs\
|#9Nu9ak
/** ?O3E.!Q|
* @author treeroot {FRUB(68b
* @since 2006-2-2 x=>B 6o-f
* @version 1.0 l~P%mVC3m
*/ pu#h:nb>88
public class HeapSort implements SortUtil.Sort{ buV{O[
Xc"l')1H
/* (non-Javadoc) 'J\nvNm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U-~cVk+LI
*/ fA"N5qQI(
public void sort(int[] data) { NG3!09eY
MaxHeap h=new MaxHeap(); >np!f8+d"q
h.init(data); =rSJ6'2("
for(int i=0;i h.remove(); BG ,ln(Vz
System.arraycopy(h.queue,1,data,0,data.length); l;{n"F
} 5cj]Y)I-~
..jc^'L
private static class MaxHeap{ "#zSk=52z
0u[Vd:()v(
void init(int[] data){ #r5IwyL
this.queue=new int[data.length+1]; @yc/1u$r
for(int i=0;i queue[++size]=data; dy/\>hu
fixUp(size); s<3cvF<
} $sF'Sr{)y
} S-x'nu$u
Z;M}.'BE
private int size=0; D{'>G@nLQ
h8Wv t's
private int[] queue; VF#2I%R*
,Dh+-}
public int get() { R1'tW=
return queue[1]; rl:6N*kK
} {#?$p i[
nV`n=x
public void remove() { R<\5q%@G
SortUtil.swap(queue,1,size--); Nf@-i`
fixDown(1); /hrVnki*
} W`^euBr7R>
file://fixdown ?a)X)#lQ
private void fixDown(int k) { NT(gXEZ
int j; =;tDYuFc!
while ((j = k << 1) <= size) { 96a2G,c>V
if (j < size %26amp;%26amp; queue[j] j++; >.sdLA Si
if (queue[k]>queue[j]) file://不用交换 .kbo]P
break; (i3V[H
SortUtil.swap(queue,j,k); pTzwyj!SD
k = j; !u)>XS^E
} A=N &(k
} %P3|#0yg0
private void fixUp(int k) { !V%h0OE\
while (k > 1) { <H; z4
int j = k >> 1; rN$U%\.I
if (queue[j]>queue[k]) V1yY>
break; FCr^D$_w
SortUtil.swap(queue,j,k); dWR-}>
k = j; a,$v;s/
} XIep3l*
} blVt:XS{,m
<R;t>~8x
} MC'2;,
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} tVUC@M>'
r%:Q(|v?
SortUtil： E*B6k!:
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package org.rut.util.algorithm; Z91{*?
crwui8
import org.rut.util.algorithm.support.BubbleSort; ^i"~6QYE
import org.rut.util.algorithm.support.HeapSort; ce&Q}_
import org.rut.util.algorithm.support.ImprovedMergeSort; AhyV
import org.rut.util.algorithm.support.ImprovedQuickSort; pYRqV
import org.rut.util.algorithm.support.InsertSort; (GCeD-
import org.rut.util.algorithm.support.MergeSort; _L^(CFE
import org.rut.util.algorithm.support.QuickSort; 4uX|2nJ2!;
import org.rut.util.algorithm.support.SelectionSort; Y^Y1re+}
import org.rut.util.algorithm.support.ShellSort; hx.ln6=4
K|Cb6''
/** H{d;,KfX
* @author treeroot qH=<8Iu
* @since 2006-2-2 q,Nhfo(
* @version 1.0 7{BTtUMAC
*/ 78MQoG<
public class SortUtil { swTur
public final static int INSERT = 1; Y[R;UJE`5
public final static int BUBBLE = 2; \3hj/
public final static int SELECTION = 3; Gi+ZI{)
public final static int SHELL = 4; #Fwf]{J
public final static int QUICK = 5; ):L ; P)
public final static int IMPROVED_QUICK = 6; ZzO^IZKlC
public final static int MERGE = 7; !H^e$BA
public final static int IMPROVED_MERGE = 8; x & ZW f?
public final static int HEAP = 9; AE@N:a
k|r|*|8
public static void sort(int[] data) { }\?]uNH
sort(data, IMPROVED_QUICK); |y%M";MI
} +EOd9.X\~
private static String[] name={ |=rb#z&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L60Sc
}; hMNC]
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private static Sort[] impl=new Sort[]{ P$H9
new InsertSort(), ;%<R>gDWv
new BubbleSort(), P 5_l&
new SelectionSort(), Nu[0X
new ShellSort(), .QLjaEja
new QuickSort(), l\DcXgD x
new ImprovedQuickSort(), aWk1D.
new MergeSort(), Ls2g#+
new ImprovedMergeSort(), $v\o14v
new HeapSort() L3J .Oh
}; *Z}9S9YtN
d) $B
public static String toString(int algorithm){ #HyE-|_C
return name[algorithm-1]; %SC%#_7
} s;Sv@=\
gCP f1z
public static void sort(int[] data, int algorithm) { pRc<U^Z.h
impl[algorithm-1].sort(data); (> VD#n
} ^77X?nDz=h
,@Aeo9}
public static interface Sort { Z~Vups#+f
public void sort(int[] data); aTi,gJ;*
} *Fu;sR2y%:
P{%R*hb]
public static void swap(int[] data, int i, int j) { U2HAIV8
int temp = data; <MzXTy3\
data = data[j]; X(dHhO
data[j] = temp; N)Qz:o0W
} rLx'.:
} d[$YTw