[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; u,:CJ[3
} m*\B2\2gJ
int i1=l; Cc@=?
int i2=mid+1; ,LoMt ]H
for(int cur=l;cur<=r;cur++){ @gH(/pFX
if(i1==mid+1) <Z2(qZ^Z
data[cur]=temp[i2++]; =fL6uFmxI@
else if(i2>r) aytq4Ts
data[cur]=temp[i1++]; ,}eRnl\
else if(temp[i1] data[cur]=temp[i1++]; @47[vhE
else 0m]~J_
data[cur]=temp[i2++]; tniPEmeS
} 9Q,Msl4n
} [q|?f?Zl
YgO aZqN
} Uc_'3|e
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改进后的归并排序: c-[Q,c
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package org.rut.util.algorithm.support; b*btkaVue
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import org.rut.util.algorithm.SortUtil; -}=@ *See#
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/** 3*CzXK>`M&
* @author treeroot V}vl2o
* @since 2006-2-2 N>uA|<b,
* @version 1.0 8O"x;3I9
*/ 0ClX
public class ImprovedMergeSort implements SortUtil.Sort { H arFo
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private static final int THRESHOLD = 10; +O;OSZ
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/* a)I=U[
* (non-Javadoc) R=][>\7]}
* nu\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zp/qs z(]
*/ D=i0e8D!+
public void sort(int[] data) { \SYPu,ZT
int[] temp=new int[data.length]; Ma`
mergeSort(data,temp,0,data.length-1); xTa4.ZXg
} F'V+2,.
^ I{R[O'8
private void mergeSort(int[] data, int[] temp, int l, int r) { 9s;!iDFn
int i, j, k; 7i-W*Mb:
int mid = (l + r) / 2; U6/m_`nc
if (l == r) Ff)~clIK '
return; ?=/}Ft
if ((mid - l) >= THRESHOLD) A^T~@AO
mergeSort(data, temp, l, mid); m~= ]^e
else $Nt=gSWw5
insertSort(data, l, mid - l + 1); WU+Jo@]y
if ((r - mid) > THRESHOLD) *3w/`R<\
mergeSort(data, temp, mid + 1, r); Z4wrXss~
else >.!5M L\
insertSort(data, mid + 1, r - mid); <2o.,2?G
[I+)Ak5
for (i = l; i <= mid; i++) { buq *abON
temp = data; Q70**qm
} zVc7q7E
for (j = 1; j <= r - mid; j++) { eI/\I:G{f
temp[r - j + 1] = data[j + mid]; ;y?D1o^r8W
} giPhW>
int a = temp[l]; jza}-=&+e
int b = temp[r]; i(&6ys5
for (i = l, j = r, k = l; k <= r; k++) { j{7ilo(i
if (a < b) { 6g~o3
data[k] = temp[i++]; i-i}`oN
a = temp; |mQtjo
} else { t[f9Z
data[k] = temp[j--]; {.' ,%)
b = temp[j]; ,<^tsCI
} 4t%:O4 3e
} t]u(jX)
} 7tf81*e
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/** bgzT3KZ
* @param data wH(vX<W-E
* @param l Rktn/Vi
* @param i Dvq*XI5
*/ ?|Q5]rhs
private void insertSort(int[] data, int start, int len) { XW&8T"q7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RIVL 0Ig
} +>i<sk
} #v~S",*.f
} o$HJg
} v'bd.eqw
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堆排序： 08K.\3
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package org.rut.util.algorithm.support; }TX'Z?Lq
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import org.rut.util.algorithm.SortUtil; +,F= -
?{.b9`
/** gGiV1jN_
* @author treeroot BJO~$/R?v
* @since 2006-2-2 r"u(!~R
* @version 1.0 Cs1%g
*/ .2{C29g
public class HeapSort implements SortUtil.Sort{ s:jL/%+COZ
vVAZSR#
/* (non-Javadoc) m)[wZP*e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QkCoW[sn
*/ *p#YK|
public void sort(int[] data) { XvzV lKL
MaxHeap h=new MaxHeap(); ?/l}(t$H
h.init(data); #Zavdkw=d
for(int i=0;i h.remove(); /4-eoTxy
System.arraycopy(h.queue,1,data,0,data.length); c@o/Cv
} /P8eI3R
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private static class MaxHeap{ QhE("}1
rD(ep~^M
void init(int[] data){ xU\:Vid+A
this.queue=new int[data.length+1]; 1O3<%T#LOZ
for(int i=0;i queue[++size]=data; c;|&>Fp
fixUp(size); pqQdr-aR=
} <>*''^
} 9 <kkzy
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private int size=0; W}e[.iX;
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private int[] queue; CO%O<_C
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public int get() { RH'F<!p
return queue[1]; *(SBl}f4l
} :jKXKY+T
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public void remove() { *}iT6OJ
SortUtil.swap(queue,1,size--); Wn,g!rB^@
fixDown(1); |C2.Zay
} CIik@O*
file://fixdown ;,B@84'
private void fixDown(int k) { +zdq+<9X
int j; piiQ
while ((j = k << 1) <= size) { 98%tws`
if (j < size %26amp;%26amp; queue[j] j++; ?xTeio44
if (queue[k]>queue[j]) file://不用交换 >'1Q"$;
break; -WW!V(~p
SortUtil.swap(queue,j,k); q!oZ; $
k = j; 4#7@KhK}
} NW>:Lz ?"
} 08jUVHdt
private void fixUp(int k) { K{w=qJBM
while (k > 1) { k;:u| s8NS
int j = k >> 1; 36Z`.E>~L
if (queue[j]>queue[k]) ^nm!NL{z^
break; Boj{+rE0
SortUtil.swap(queue,j,k); owY_cDzrH
k = j; }?qnwx.
} mlw BATi
} 3]]6z K^i
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} 3^-)gK
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} vls> 6h
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SortUtil： 'nDT.i
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package org.rut.util.algorithm; p|8Fl
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import org.rut.util.algorithm.support.BubbleSort; (X7yNIPfA
import org.rut.util.algorithm.support.HeapSort; Ay6rUN1ef
import org.rut.util.algorithm.support.ImprovedMergeSort; sF3 l##Wv
import org.rut.util.algorithm.support.ImprovedQuickSort; 3Co>3d_
import org.rut.util.algorithm.support.InsertSort; k'q !MZU
import org.rut.util.algorithm.support.MergeSort; l45F*v]^
import org.rut.util.algorithm.support.QuickSort; b2f2WY |z>
import org.rut.util.algorithm.support.SelectionSort; Fl>j5[kLZ
import org.rut.util.algorithm.support.ShellSort; td$6:)
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/** %|* y/m
* @author treeroot #YVDOR{z
* @since 2006-2-2 1;[ <||K
* @version 1.0 '0M0F'R
*/ juYt =
public class SortUtil { 61wG:
public final static int INSERT = 1; uOUw8
public final static int BUBBLE = 2; 2}\sj'0&
public final static int SELECTION = 3; ^B=z_0 *
public final static int SHELL = 4; (y4Eq*n%!
public final static int QUICK = 5; cW/~4.v$
public final static int IMPROVED_QUICK = 6; rtOW-cz
public final static int MERGE = 7; p 8Hv7*
public final static int IMPROVED_MERGE = 8; Y tj>U
public final static int HEAP = 9; ] r+I D
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public static void sort(int[] data) { yXl.Gq>]{
sort(data, IMPROVED_QUICK); s/^=WV
} DYk->)
private static String[] name={ /38Pp%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UiN ^x
}; by ee-BU
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private static Sort[] impl=new Sort[]{ 2p.+C35c=j
new InsertSort(), 8>+eGz|
new BubbleSort(), dM.Ow!j
new SelectionSort(), $4)guG)
new ShellSort(), EHJc*WFPU-
new QuickSort(), QncS&
new ImprovedQuickSort(), E0Xu9IW/A
new MergeSort(), >(Ddw N9l
new ImprovedMergeSort(), jXva?_
new HeapSort() gz:c_HJ
}; mM~Q!`Nf.
n!orM5=:O
public static String toString(int algorithm){ Y(mwJud|
return name[algorithm-1]; UM^hF%
} iU|C<A%Hh
w5R9\<3L
public static void sort(int[] data, int algorithm) { ;yoq/
impl[algorithm-1].sort(data); r2`?Ta
} aq**w?l
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public static interface Sort { R dzIb-
public void sort(int[] data); %j`]x -aOz
} |'(IWU
cv&hT.1
public static void swap(int[] data, int i, int j) { _+7f+eB
int temp = data; ~_6rD`2cJ
data = data[j]; R|yTUGY
data[j] = temp; cZi&L p
} artS*fv3r
} N4FG_N