[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; AH$D./a
} =5bef8O
int i1=l; E?> ERO3
int i2=mid+1; Gni<@;}
for(int cur=l;cur<=r;cur++){ w i,}sEoM
if(i1==mid+1) __Kn 1H{
data[cur]=temp[i2++]; |/,XdTSy
else if(i2>r) e 5hq>K
data[cur]=temp[i1++]; N%Gb
else if(temp[i1] data[cur]=temp[i1++]; RJ/4T#b"+
else (UWV#AR
data[cur]=temp[i2++]; !Yx9=>R
} $q`650&S*
} E"p;
9&R. <I
} m,i@
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改进后的归并排序: 3ifQKKcR{
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package org.rut.util.algorithm.support; +{ Q]$b
@.Pd3CB0
import org.rut.util.algorithm.SortUtil; zTODV<-`
#.|efdsG
/** m22FOjk\
* @author treeroot FsI51@V72Q
* @since 2006-2-2 QkJAjmB
* @version 1.0 fi*@m,-
*/ nCF1i2*6|"
public class ImprovedMergeSort implements SortUtil.Sort { LadE4:oy
"8{#R*p
private static final int THRESHOLD = 10; L+s3@C;b
&s.S)'l4l
/* NRU&GCVwu
* (non-Javadoc) |tl4I2AV
* cE3g7(a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bf37/kkf(
*/ 1n+C'P"
public void sort(int[] data) { "<f"r#
int[] temp=new int[data.length]; '1|FqQ\.
mergeSort(data,temp,0,data.length-1); +AGI)uQQ
} iTf]Pd'
kXw&*B-/
private void mergeSort(int[] data, int[] temp, int l, int r) { F@</Ev
int i, j, k; AN-qcp6=o
int mid = (l + r) / 2; DbRq,T
if (l == r) '6Lw<#It
return; ] B ZSW
if ((mid - l) >= THRESHOLD) \.m"u14[b
mergeSort(data, temp, l, mid); Bp #:sAG
else M^f+R'Q3
insertSort(data, l, mid - l + 1); cB,O"-
if ((r - mid) > THRESHOLD) b^WTX
mergeSort(data, temp, mid + 1, r); Bf {h\>q
else q~QB?+ x&
insertSort(data, mid + 1, r - mid); d|T87K>|r"
Tf[o'=2
for (i = l; i <= mid; i++) { )YSS>V
temp = data; ma__LWKM,
} v#yeiE4
for (j = 1; j <= r - mid; j++) { !% 'dyj
temp[r - j + 1] = data[j + mid]; 'Z^-(xG,+
} -_<rmR[:]
int a = temp[l]; wGRMv1|lIu
int b = temp[r]; 9 b?Nlk8d
for (i = l, j = r, k = l; k <= r; k++) { rUJIf;Zwo
if (a < b) { {ek axSR
data[k] = temp[i++]; O7&6]/`
a = temp; B.O &KRo
} else { [FhFeW>
data[k] = temp[j--]; b/>L}/^PM
b = temp[j]; J['pBlEb\
} F#<$yUf%
} 14U:.Q
} P*9vs%W
Jat|n97$
/** 'Ipp1a Z_M
* @param data UBj"m<
* @param l NR </Jm*
* @param i .(D,CGtYb
*/ Cp[{|U-?G
private void insertSort(int[] data, int start, int len) { xA?(n!{P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /j}"4_.8
} >P-{2 a,4
} ExJch\
} 'fIBJ3s[o
} |2ttdc.
6;JlA})
堆排序： j>D[iHrH
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package org.rut.util.algorithm.support; v'fX'/
Dht,!LVb;
import org.rut.util.algorithm.SortUtil; `dp]N0nz
YwYCXFQ|
/** 8v|?g8e3
* @author treeroot luPj'd?
* @since 2006-2-2 D' d^rT| H
* @version 1.0 1/hk3m(C
*/ tN-U,6c]
public class HeapSort implements SortUtil.Sort{ VB(S]N)F^
7Pb:z4j
/* (non-Javadoc) {Z~5#<t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Aw7oyC!
*/ /b ]Yya#
public void sort(int[] data) { s,~p}A%0
MaxHeap h=new MaxHeap(); 'f'zV@)
h.init(data); Imv]V6"D=
for(int i=0;i h.remove(); J%|n^^ /un
System.arraycopy(h.queue,1,data,0,data.length); 1-!q,q
} p bRU"
|ORro r}
private static class MaxHeap{ J~"h&>T
oZ CvEVUk
void init(int[] data){ ,)u7PMs
this.queue=new int[data.length+1]; G; onJ>
for(int i=0;i queue[++size]=data; :h(r2?=7
fixUp(size); =zetZJg
} 0vi)my;!
} =Su~iOa
0P?\eoB@8
private int size=0; ggP#2I\
T?!D?YV
private int[] queue; |mHxkd
X3# AYn,
public int get() { ZvSWIQ6
return queue[1]; -n>JlfCd2
} n"Gow/-;
q8Z,XfF^S
public void remove() { ..Dr?#Cr
SortUtil.swap(queue,1,size--); 3M@!?=|U
fixDown(1); AbXaxt/[g?
} Hea76P5$P+
file://fixdown ug?])nO.C
private void fixDown(int k) { z[E gMS!
int j; . #7B10
while ((j = k << 1) <= size) { Y<h [5
if (j < size %26amp;%26amp; queue[j] j++; .#BWu(EYV
if (queue[k]>queue[j]) file://不用交换 i wFI lJ@
break; 8i?Hh?Mf}
SortUtil.swap(queue,j,k); da,;IE{1u
k = j; =o<iBbK#|
} -C
} s\Zp/-Q
private void fixUp(int k) { $$GmundqB
while (k > 1) { ` 6'dhB
int j = k >> 1; 0P%,1M3d
if (queue[j]>queue[k]) |o5F%1o
break; ~"IjT'W3
SortUtil.swap(queue,j,k); xklXV
k = j; P.j0Xlof
} `3QAXDWE
} (*XSrQ
X6Y<pw`y
} n#.~XNbxv
8*-N@j8
} Qr n^T
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SortUtil： <dd(i
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package org.rut.util.algorithm; ruf*-&Kr7
3%J7_e'
import org.rut.util.algorithm.support.BubbleSort; DXH"`1[-
import org.rut.util.algorithm.support.HeapSort; #&oL iz=hZ
import org.rut.util.algorithm.support.ImprovedMergeSort; -weCdTY`X
import org.rut.util.algorithm.support.ImprovedQuickSort; pT=YV k
import org.rut.util.algorithm.support.InsertSort; DjK
import org.rut.util.algorithm.support.MergeSort; PrZs@ Y
import org.rut.util.algorithm.support.QuickSort; %K$f2):
import org.rut.util.algorithm.support.SelectionSort; _$f XK
import org.rut.util.algorithm.support.ShellSort; L{i,.aE/nO
[=otgVteN"
/** |Nfi y
* @author treeroot U`-]U2"
* @since 2006-2-2 qFpRY7eq
* @version 1.0 B(z?IW&
*/ =Eimbk
public class SortUtil { 3r]m8Hp
public final static int INSERT = 1; GK>.R<[
public final static int BUBBLE = 2; iW\Q>~0#_
public final static int SELECTION = 3; kzUP
public final static int SHELL = 4; K9@F1ccQ/
public final static int QUICK = 5; chQCl3&e^
public final static int IMPROVED_QUICK = 6; Hyj<Fqr!.
public final static int MERGE = 7; fzhCV
public final static int IMPROVED_MERGE = 8; ZB|y
public final static int HEAP = 9; F(5(cr 7K
TSPFi0PP
public static void sort(int[] data) { lZI?k=rWv
sort(data, IMPROVED_QUICK); gTby%6-\|
} S.Z2gFE&tu
private static String[] name={ wQnW2)9!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;n"Nv}<C
}; ;%/Kh :Vg
1X7tN2tQ
private static Sort[] impl=new Sort[]{ QUSyVp{$
new InsertSort(), lCznH?[
new BubbleSort(), ujt0?DM
new SelectionSort(), }CoR$K
new ShellSort(), i`F8kg`_K
new QuickSort(), #$ Q2ijT0
new ImprovedQuickSort(), -76l*=|
new MergeSort(), }0%~x,
new ImprovedMergeSort(), oRbG6Vv/
new HeapSort() G5R"5d'
}; :hA=(iz
HLa3lUo
public static String toString(int algorithm){ ( \ \BsK
return name[algorithm-1]; )T_o!/\*|*
} Jh)x_&R&Q
e=yQFzQT)
public static void sort(int[] data, int algorithm) { ?f{--|V
impl[algorithm-1].sort(data); F"?OLV1B&
} Ns*&;x9
aJmSagr69C
public static interface Sort { >;9+4C<z0
public void sort(int[] data); R[l9f8
} .>.B
*nj={Ss&
public static void swap(int[] data, int i, int j) { X:ck
int temp = data; $}*bZ~
data = data[j]; Hfw*\=p
data[j] = temp; ?mRGFS
} I1Jo8s
} 42{\u08Z