[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; }MRgNr'k
} >6o <Q
int i1=l; %`&n ;K.c
int i2=mid+1; p<r<Y%
for(int cur=l;cur<=r;cur++){ 7_1 Iadb
if(i1==mid+1) )-3~^Y#r_
data[cur]=temp[i2++]; t`K9K"|k
else if(i2>r) _ Lh0
data[cur]=temp[i1++]; D j9aTO
else if(temp[i1] data[cur]=temp[i1++]; G7 UUx+X
else m| ,Tk:xH
data[cur]=temp[i2++]; |KYl'"5\
} SF:98#pg
} {:gx*4}q8
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} Zmyq6.1q~
kS-BB[T
改进后的归并排序: I_ZJnu<
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package org.rut.util.algorithm.support; Z5q%L!4G
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import org.rut.util.algorithm.SortUtil; _VT{2`|})
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/** }gv'r ";
* @author treeroot 9!n:hhJM
* @since 2006-2-2 l7VO8p]y[R
* @version 1.0 \|Af26
*/ .z,-ThTH@\
public class ImprovedMergeSort implements SortUtil.Sort { ElW\;C:K*
MeBTc&S<
private static final int THRESHOLD = 10; DS(>R!bb
ImhkU%
/* =T[P
* (non-Javadoc) daKZ*B|
* gtuSJ+up
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n{4iW_/D
*/ zq</(5H
public void sort(int[] data) { ]"T157F
int[] temp=new int[data.length]; fYP,V0P
mergeSort(data,temp,0,data.length-1); fF0K].
} Dr.eos4 ~
@o0HDS
private void mergeSort(int[] data, int[] temp, int l, int r) { XE2Un1i}j1
int i, j, k; 0cHcBxdF
int mid = (l + r) / 2; Eg`~mE+a
if (l == r) M$EF 8
return; UmVn:a
if ((mid - l) >= THRESHOLD) <9pI~\@w
mergeSort(data, temp, l, mid); IE\RP!
else @H?OHpJ"`
insertSort(data, l, mid - l + 1); K`N$nOw
if ((r - mid) > THRESHOLD) bW W!,-|R
mergeSort(data, temp, mid + 1, r); U^7hw(}me
else O<s7VHj
insertSort(data, mid + 1, r - mid); .\a+m
]x metv|7
for (i = l; i <= mid; i++) { Ms6;iW9
temp = data; KJT N"hF
} DIGw4g4Kt
for (j = 1; j <= r - mid; j++) { 6Mc&=}bV
temp[r - j + 1] = data[j + mid]; k5\V:P=#
} fh =R
int a = temp[l]; .$-;`&0cZ
int b = temp[r]; DLbP$&o
for (i = l, j = r, k = l; k <= r; k++) { Gk5'|s
if (a < b) { ]#M"|iTR
data[k] = temp[i++]; e2=}qE7
a = temp; jF;<9-m&
} else { jj&G[-"bv
data[k] = temp[j--]; *I?-A(e
b = temp[j]; @-)S*+8
} hXI[FICQU{
} %@:>hQ2;
} -`q!mdA2
LBG`DYR@
/** z\tY A
* @param data Q+Nnj(AQY
* @param l @~2k5pa
* @param i ]CP5s5
*/ A/=cGE
private void insertSort(int[] data, int start, int len) { 6g-jhsW6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P7}w^#x
} i}LQ}35@
} qE2<vjRg
} &k)+]r
} *=@8t^fa86
l atm_\
堆排序： $Z&6
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package org.rut.util.algorithm.support; +jrx;xwot
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import org.rut.util.algorithm.SortUtil; 8i"CU:(
A&1EOQ=N
/** eJqx,W5MK]
* @author treeroot G--vwvL
* @since 2006-2-2 e[x,@P`
* @version 1.0 %GjG.11V,_
*/ [5xm>Y&}
public class HeapSort implements SortUtil.Sort{ Lb$Uba-_
O8hx}dOjA
/* (non-Javadoc) }%w;@[@L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K_U`T;Z\
*/ bzpi7LKN
public void sort(int[] data) { $]?pAqU\
MaxHeap h=new MaxHeap(); 27gHgz}}
h.init(data); 0*:n<T9
for(int i=0;i h.remove(); h(q4 B~
System.arraycopy(h.queue,1,data,0,data.length); BpA7 z/
} KD#zsL)3
>;G_o="X
private static class MaxHeap{ L`M{bRl+1
oa+'.b~
void init(int[] data){ ui8$F "I*
this.queue=new int[data.length+1]; ;Uch
for(int i=0;i queue[++size]=data; vH6(p(l
fixUp(size); >7a ENKOg:
} fPN/Mxu
} r|Uz?
G{.=27
private int size=0; 7oLlRU
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private int[] queue; 5Qg*j/z?
nS$4[!0
public int get() { b7xOm"X,N
return queue[1]; >*/ |tL
} f(}&8~&
\W_ Dz*N
public void remove() { ++w{)Io Z
SortUtil.swap(queue,1,size--); `&a8Wv
fixDown(1); aU +uPP
} \zVp8MMf
file://fixdown eiOAbO#U
private void fixDown(int k) { z1RHdu0;z
int j; )e[q%%ks
while ((j = k << 1) <= size) { Wsd_RT}ww
if (j < size %26amp;%26amp; queue[j] j++; X%!?\3S
if (queue[k]>queue[j]) file://不用交换 ?>=vKU5
break; lKQjG+YF
SortUtil.swap(queue,j,k); LVP6vs
k = j; BB,-HhYT0
} #\F8(lZ
} =S^vIo)
private void fixUp(int k) { !pa7]cZ
while (k > 1) { \py&v5J)s!
int j = k >> 1; N<(rP1)`v
if (queue[j]>queue[k]) ]%7m+-h@
break; kVWrZ>McK
SortUtil.swap(queue,j,k); '#K~hep
k = j; ZnbpIJ8cV
} %D7^.
} M9Z9s11{H
pOy(XUV9O
} |<]wM(GxE
%RIu'JXi
} ctb , w
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SortUtil： M(^IRI-
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package org.rut.util.algorithm; $43CNnf3N
>&Ye(3w&
import org.rut.util.algorithm.support.BubbleSort; M;-FW5O't
import org.rut.util.algorithm.support.HeapSort; Oa5-^&I
import org.rut.util.algorithm.support.ImprovedMergeSort; B 4e}%
import org.rut.util.algorithm.support.ImprovedQuickSort; /KiaLS
import org.rut.util.algorithm.support.InsertSort; +ZwTi!W
import org.rut.util.algorithm.support.MergeSort; UA0R)BH'
import org.rut.util.algorithm.support.QuickSort; s0Y7`uD^
import org.rut.util.algorithm.support.SelectionSort; !vr A\d
import org.rut.util.algorithm.support.ShellSort; W70BRXe04D
%&O'>L
/** _=5\$6
* @author treeroot 0,LUi*10
* @since 2006-2-2 8r.MODZG/
* @version 1.0 F j"]C.6B.
*/ $iy(+}
public class SortUtil { 6>d3*
public final static int INSERT = 1; '~6l 6wi
public final static int BUBBLE = 2; SZgan
public final static int SELECTION = 3; ^3&-!<*
public final static int SHELL = 4; 0"@p|nAa
public final static int QUICK = 5; .}tpEvAw}
public final static int IMPROVED_QUICK = 6; a- /p/ I-%
public final static int MERGE = 7; n 8|
public final static int IMPROVED_MERGE = 8; %eu_Pr6X
public final static int HEAP = 9; H~<wAer,Op
.fzns20u
public static void sort(int[] data) { toox`|
sort(data, IMPROVED_QUICK); Im`R2_(]
} ~r]$(V n
private static String[] name={ >&qaT*_g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3A b_Z
}; :rmi8!o
_ZuI x=!
private static Sort[] impl=new Sort[]{ JZNvuPD
new InsertSort(), =?B[oq
new BubbleSort(), vinn|_s%
new SelectionSort(), L!W5H2Mc
new ShellSort(), 'Ya-;5Y]
new QuickSort(), YH[HJ#:7r
new ImprovedQuickSort(), <,'^dR7,
new MergeSort(), SQ`ec95',
new ImprovedMergeSort(), hcD.-(-;)
new HeapSort() kL}*,8s{
}; YP}r15P
)%?SWuS?N
public static String toString(int algorithm){ u z>V
return name[algorithm-1]; 1w?DSHe
} i ;YRE&X
t9kqX(!
public static void sort(int[] data, int algorithm) { 8x6{[Tx
impl[algorithm-1].sort(data); Z@>WUw@F
} +3;[1dpgf
<dhBO
public static interface Sort { cp 7;~i3
public void sort(int[] data); /%)x!dmy
} v.]W{~PI2V
E'_$?wWn5
public static void swap(int[] data, int i, int j) { .`N&,&H
int temp = data; I* JSb9r
data = data[j]; yi1V\8DC
data[j] = temp; ML_[Z_Q<z
} Bdf]?s[]
} 7vsXfIP+