[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; ."PR Z,
} ;vF8V`f
int i1=l; "a6 wd
int i2=mid+1; lbgnO s,
for(int cur=l;cur<=r;cur++){ wr8n*Du
if(i1==mid+1) %dS7u$Rnh
data[cur]=temp[i2++]; (ZjIwA9>
else if(i2>r) ?Gj$$IAe
data[cur]=temp[i1++]; 3b{8c8N^
else if(temp[i1] data[cur]=temp[i1++]; &H,j .~a&l
else Hv<%_t_/
data[cur]=temp[i2++]; aM3%Mx?w
} f| 3`8JU
} =2)5_/9au
OsAXHjX}
} czb(&><
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改进后的归并排序: Yq#I# 2RD
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package org.rut.util.algorithm.support; 9ToM5oQ
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import org.rut.util.algorithm.SortUtil; 7~eo^/PbS
-^$CGRE6A
/** bP Er+?fu
* @author treeroot ]<4Yor}t{;
* @since 2006-2-2 /[GOs*{zB
* @version 1.0 f3V&i)w(
*/ z>&Py(
public class ImprovedMergeSort implements SortUtil.Sort { #:vosVqG
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private static final int THRESHOLD = 10; =q^o6{d0"
=5%jKHo+9z
/* %7O`]ik:
* (non-Javadoc) "(/|[7D)
* l?a(=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,<|EoravH
*/ )dJM
public void sort(int[] data) { Nt&}T
int[] temp=new int[data.length]; ]NuY{T&:
mergeSort(data,temp,0,data.length-1); FI*.2rdSR
} \"_;rJ{!aE
M[R, m_p
private void mergeSort(int[] data, int[] temp, int l, int r) { S]9:3~
int i, j, k; phbdV8$L
int mid = (l + r) / 2; t_3)}
if (l == r) zScV 9,H1
return; h^~eTi;c]Q
if ((mid - l) >= THRESHOLD) ~0|~Fg
mergeSort(data, temp, l, mid); L`x:Y>C(
else _"a(vfl#
insertSort(data, l, mid - l + 1); {+z+6i
if ((r - mid) > THRESHOLD) gO4J[_
mergeSort(data, temp, mid + 1, r); X+P& up06
else M$%aX,nk'
insertSort(data, mid + 1, r - mid); vjZX8KAiZ
EiP_V&\
for (i = l; i <= mid; i++) { 5xLuuKG
temp = data; _myam3[W
} !;'U5[}8
for (j = 1; j <= r - mid; j++) { EZIMp8^
temp[r - j + 1] = data[j + mid]; cpFw]w%]
} kdQ=%
int a = temp[l]; -CT?JB
int b = temp[r]; o,D>7|h
for (i = l, j = r, k = l; k <= r; k++) { >Bskw2
if (a < b) { '8i np[_
data[k] = temp[i++]; \0(QO8.
a = temp; mV`Z]-$$i
} else { # u^FB
data[k] = temp[j--]; *ta|,
b = temp[j]; sTeL4g|%{
} cm-cwPAh
} Si6%6rAhj
} -Qiay/tlu
kd|@.
/** xlgN}M
* @param data &{x5 |$SD
* @param l #?!)-Q%
* @param i n|SsV
*/ @ L%3}
private void insertSort(int[] data, int start, int len) { Cg}cD.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8cfxKUS
} uzho>p[ae
} H`),PY2
} +X cB5S>
} q^([ & +
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堆排序： kIrME:
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package org.rut.util.algorithm.support; +S^Uw'L$=T
a`q">T%q
import org.rut.util.algorithm.SortUtil; cEve70MV
h+,zfVJu
/** 2B=yT8
* @author treeroot :~zK0v"
* @since 2006-2-2 9i yNR!
* @version 1.0 d@7 ]=P:
*/ WkXa%OZ
public class HeapSort implements SortUtil.Sort{ 2P!Pbl<
s7(mNpo
/* (non-Javadoc) R\A5f\L9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iW-w?!>|m
*/ 2[r#y1ro
public void sort(int[] data) { k U*\Fa*E
MaxHeap h=new MaxHeap(); d=xU f`^
h.init(data); O6Xu/X]
for(int i=0;i h.remove(); ~-A5h(
System.arraycopy(h.queue,1,data,0,data.length); yGZb
} $khWu>b
oq^#mJL
private static class MaxHeap{ s$&:F4=?
:f 1*-y
void init(int[] data){ IObGmc
this.queue=new int[data.length+1]; QC \8Zy
for(int i=0;i queue[++size]=data; dL |D
fixUp(size); 1 c3gHc7{t
} K>lA6i7?
} %^2LTK(P
^7Z)/c`"
private int size=0; jU@qQ@|
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private int[] queue; -PBm@}*
80![aj}z4G
public int get() { -%5*c61
return queue[1]; (pREo/T
} < :<E~anH
9Fv1D
public void remove() { XBF#ILJ
SortUtil.swap(queue,1,size--); owmV7E1
fixDown(1); |@sUN:G4k
} CS:j->
file://fixdown k9.@S
private void fixDown(int k) { ",w@_}z:
int j; ['tGc{4
while ((j = k << 1) <= size) { 7xMvf<1P
if (j < size %26amp;%26amp; queue[j] j++; g.SFl
if (queue[k]>queue[j]) file://不用交换 (}V.xi
break; '.c[7zL
SortUtil.swap(queue,j,k); Ldf<
k = j; :+bQPzL
} F7Mf>."
} :~~}|Eu
private void fixUp(int k) { c/^} =t(
while (k > 1) { #i%it
int j = k >> 1; Kxn/@@z>u
if (queue[j]>queue[k]) |bQKymS
break; O B_g:T
SortUtil.swap(queue,j,k); Xg^`fRg =T
k = j; UP58Cln*
} X#Y0g`muW
} =XzrmPu
\v)Dy)Vhg2
} QpBgG~h"
&;&i#ZO
} +j1s*}8
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SortUtil： *l)_&p
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package org.rut.util.algorithm; dPc*!xrq
%nSm 32/t3
import org.rut.util.algorithm.support.BubbleSort; ;ug&v C
import org.rut.util.algorithm.support.HeapSort; T4]/w|?G
import org.rut.util.algorithm.support.ImprovedMergeSort; P6u9Ngay
import org.rut.util.algorithm.support.ImprovedQuickSort; ONH!ms(kb
import org.rut.util.algorithm.support.InsertSort; AME3hA
import org.rut.util.algorithm.support.MergeSort; )^qM%k8
import org.rut.util.algorithm.support.QuickSort; yAy~|1}
import org.rut.util.algorithm.support.SelectionSort; g j8rrd|
import org.rut.util.algorithm.support.ShellSort; ?T3zA2
^ r-F@$:.
/** }3E@]"<cVR
* @author treeroot Oz'x5/%G
* @since 2006-2-2 EcxPbRg
* @version 1.0 <1YINkRz
*/ :1^ R$0d
public class SortUtil { Oh3AbpTT
public final static int INSERT = 1; @%d g0F}h
public final static int BUBBLE = 2; 'Ybd'|t{}
public final static int SELECTION = 3; t3|If@T
public final static int SHELL = 4; k@L},Td
public final static int QUICK = 5; /BjM&v(5/
public final static int IMPROVED_QUICK = 6; 12`q9Io"
public final static int MERGE = 7; 'W(+rTFf!
public final static int IMPROVED_MERGE = 8; %PRG;kR
public final static int HEAP = 9; (OwAhjHE
ea kj>7\s
public static void sort(int[] data) { )r3}9J
sort(data, IMPROVED_QUICK); :hJHjh
} n+QUT
private static String[] name={ Ebw1 %W KC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $N'AZY]4]
}; ]-QY, k
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private static Sort[] impl=new Sort[]{ J -tOO
new InsertSort(), *1"xvle
new BubbleSort(), ZJ}9g(X..g
new SelectionSort(), S96H`kedZo
new ShellSort(), mFfw*,M
new QuickSort(), N[~{'i
new ImprovedQuickSort(), Xb?:dlu3
new MergeSort(), tS!FnQg4
new ImprovedMergeSort(), Veo*-sl
new HeapSort() _0N=~`'
}; 0zQ"5e?qy
U_i%@{
public static String toString(int algorithm){ K&Ner(/X`6
return name[algorithm-1]; Rah"La
} Cuu yG8
d` %8qLIW
public static void sort(int[] data, int algorithm) { ^0)Mc"&{
impl[algorithm-1].sort(data); BmR++?L
} QK%Nt
5$f vI#NO<
public static interface Sort { Uc%n{ a-a
public void sort(int[] data); ,5!&}
} +`tl<rg;
i[_(0P+Da
public static void swap(int[] data, int i, int j) { yMaU`z
int temp = data; 5.m&93P
data = data[j]; }<R,)ZV^G
data[j] = temp; iO1ir+B\
} ;;e\"%}@=q
} Z/-9G