[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; pW4$$2S?9
} ap|$8G
int i1=l; e'0BP,\f_}
int i2=mid+1; S@Q4fmH
for(int cur=l;cur<=r;cur++){ 7/b\NLeJ'
if(i1==mid+1) {~cM 6W]f
data[cur]=temp[i2++]; JsD|igqF-
else if(i2>r) "1HKD
data[cur]=temp[i1++]; w9]HJ3qi
else if(temp[i1] data[cur]=temp[i1++]; I)wc&>Lc
else yeqHeZ
data[cur]=temp[i2++]; ]CxDm
} H=v=)cUe[
} ) o`ep{<t
!THa?U;
} S}/5W
bAS/cuZs
改进后的归并排序: _`.Wib+
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package org.rut.util.algorithm.support; &5d~ODO
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import org.rut.util.algorithm.SortUtil; X([p0W 9V(
92XG|CWX
/** JpE7"Z"~MS
* @author treeroot SQs+4YJ
* @since 2006-2-2 y/>IF|aX
* @version 1.0 N.UeuLz
*/ 7&&3@96<*#
public class ImprovedMergeSort implements SortUtil.Sort { g1v=a
z9Nial`p
private static final int THRESHOLD = 10; pc2;2^U_
vR4omB{
/* sZPyEIXie
* (non-Javadoc) = P$Q;d
* OF/hD2V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t Z@OAPRx
*/ ~$d(@T&
public void sort(int[] data) { Pl\NzB,`
int[] temp=new int[data.length]; d.$0X/0
mergeSort(data,temp,0,data.length-1); j:E3c\a
} .<4U2h
W:>XXUU
private void mergeSort(int[] data, int[] temp, int l, int r) { ZRj/lQ2D
int i, j, k; u0F{.fe
int mid = (l + r) / 2; m:6*4_!
if (l == r) |[!7^tU*
return; `Wd4d2aLG
if ((mid - l) >= THRESHOLD) !v. <H]s)
mergeSort(data, temp, l, mid); W.BX6
else $Y M(NC
insertSort(data, l, mid - l + 1); qSt\ 6~
if ((r - mid) > THRESHOLD) vj9'5]!~q
mergeSort(data, temp, mid + 1, r); e$7KMH=
else Je4hQJ<h
insertSort(data, mid + 1, r - mid); [>KnMi=o)
-"rANP-UI
for (i = l; i <= mid; i++) { 3 $a;
temp = data; wZVLpF+7
} Va[t'%~&zR
for (j = 1; j <= r - mid; j++) { Tvt(nWn(H1
temp[r - j + 1] = data[j + mid]; o8Yq3N+
} T:SqENV
int a = temp[l]; ;3XOk+
int b = temp[r]; .}Eckqkp
for (i = l, j = r, k = l; k <= r; k++) { $18?Q+?3
if (a < b) { wjXv{EsMq
data[k] = temp[i++]; 6^lix9q7
a = temp; |w{C!Q8l
} else { q07H{{h/B
data[k] = temp[j--]; f@2F!
b = temp[j]; N:;z~`
} h>F"GR?U_(
} p3>Md?e
} ;iW>i8
J9MAnYd)i
/** @}2EEo#
* @param data v#EFklOP
* @param l R3>c\mA
* @param i t37<<5A
*/ G[6i\Et
private void insertSort(int[] data, int start, int len) { O`5hjq#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3 .K #,
} vqZBDQ0
} WrS>^\:
} ?L0|$#Iw
} z,bK.KFSs
Z1Qv>@u
堆排序： "dT"6,
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package org.rut.util.algorithm.support; E]}_hZU
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import org.rut.util.algorithm.SortUtil; 9kB R/{
|QD#Dx1_
/** zXU g(xu
* @author treeroot bDm7$ (
* @since 2006-2-2 (>AQ\
* @version 1.0 r*dNta<
*/ 3@:O1i
public class HeapSort implements SortUtil.Sort{ ^!x! F
Y`#6MhFT7
/* (non-Javadoc) (#Xs\IEVF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zd88+GS,#
*/ |sY
public void sort(int[] data) { ve:Oe{Ie{
MaxHeap h=new MaxHeap(); 3=^)=yOd
h.init(data); !Z 0U_*&
for(int i=0;i h.remove(); Fq_>}k@fI
System.arraycopy(h.queue,1,data,0,data.length); tRO=k34
} \XYidj
H^54o$5
private static class MaxHeap{ G0~Z|P
N&eo;Ti
void init(int[] data){ U{/fY/kq
this.queue=new int[data.length+1]; hlZ{bO'f
for(int i=0;i queue[++size]=data; !tcz_%
fixUp(size); n#}~/\P6
} G.^)5!By
} 4w#2m>.
\#WWJh"W
private int size=0; 9D Nd} rXO
Kn<+Au_]L
private int[] queue; c~O Lr
y:^o._
public int get() { '=%`;?j
return queue[1]; S3i p?9
} [ZC\8tP`V
H(tC4'tA
public void remove() { TET=>6
SortUtil.swap(queue,1,size--); .@%L8_sMR
fixDown(1); o ABrhK
} \HkBp&bqK
file://fixdown [f! { -T
private void fixDown(int k) { y.}{KQ"a*
int j; MG~Z)+g=y
while ((j = k << 1) <= size) { _p5#`-%mM
if (j < size %26amp;%26amp; queue[j] j++; *9uNM@7&0
if (queue[k]>queue[j]) file://不用交换 rMHh!)^#W
break; M. % p'^5
SortUtil.swap(queue,j,k); J*MH`;-
k = j; WcoA)we
} Yj*T'<e
} c"-X:m"
private void fixUp(int k) { ep?D;g
while (k > 1) { U,Uy0s2r
int j = k >> 1; ygH)U.
if (queue[j]>queue[k]) jf`w8*R
break; rks"y&&Nc
SortUtil.swap(queue,j,k); r5ldK?=k+*
k = j; z-b78A/8
} 4v |i\V>M
} |aAyWK S
[5!}+8]W
} ~3M8"}X;L
IN<nZ?D#
} pe0ax-Zv
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SortUtil： *$|f9jVh
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package org.rut.util.algorithm; i!*<LIq
d~rA`!s7`
import org.rut.util.algorithm.support.BubbleSort; $[?N^
import org.rut.util.algorithm.support.HeapSort; bf+C=A)s0
import org.rut.util.algorithm.support.ImprovedMergeSort; ZD'mwj+K
import org.rut.util.algorithm.support.ImprovedQuickSort; Y'~O_coG
import org.rut.util.algorithm.support.InsertSort; Hv/5)
import org.rut.util.algorithm.support.MergeSort; Anu:
import org.rut.util.algorithm.support.QuickSort; l0`bseN<
import org.rut.util.algorithm.support.SelectionSort; @vyEN.K%mm
import org.rut.util.algorithm.support.ShellSort; T9&{s-3*
>'W,8F
/** %(p9AE
* @author treeroot {6h 1
* @since 2006-2-2 l7jen=(Zb;
* @version 1.0 2wB*c9~
*/ }|2A6^FH.
public class SortUtil { FXDB> }8
public final static int INSERT = 1; YW6a?f^!
public final static int BUBBLE = 2; mz%l4w?'
public final static int SELECTION = 3; \V!{z;.fA
public final static int SHELL = 4; *cCx]C.~
public final static int QUICK = 5; 4gC(zJ
public final static int IMPROVED_QUICK = 6; b way+lh
public final static int MERGE = 7; HVoPJ!K3
public final static int IMPROVED_MERGE = 8; \By_mw
public final static int HEAP = 9; aReJ@
9ghzK?Yc
public static void sort(int[] data) { XXn3K BIf
sort(data, IMPROVED_QUICK); c`\/]
} p*42 @1,
private static String[] name={ qQ^CSn98J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BRM `/s
}; '_4apyq|
\1joW#
private static Sort[] impl=new Sort[]{ FCEmg0qdjD
new InsertSort(), LH_H yP_
new BubbleSort(), d3q.i5']G
new SelectionSort(), Be@g|'r
new ShellSort(), %V]v,
new QuickSort(), 68h1Wjg:"!
new ImprovedQuickSort(), y7:f^4
new MergeSort(), '+{yg+#/wV
new ImprovedMergeSort(), 6>#8^{[
new HeapSort() R,78}7B
}; X)hpbHa
us?q^>u
public static String toString(int algorithm){ X$\CC18
return name[algorithm-1]; *,CJ 3<>
} %G2g @2
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public static void sort(int[] data, int algorithm) { kI!@J6
impl[algorithm-1].sort(data); GB}\7a
} 1G12FV>M
i0wBZ i?
public static interface Sort { &x\)] i2f
public void sort(int[] data); zLe(#8G
} goyDG/
CQ.C{
public static void swap(int[] data, int i, int j) { v&;JVai
int temp = data; u(8{5"C
data = data[j]; }]dzY(
data[j] = temp; Uaux0W
} 7J5jf231
} FO[ s;dmzu