[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; bg!/%[ {M
} !8TlD-ZT/
int i1=l; GB23\Yv
int i2=mid+1; $iN"9N%l
for(int cur=l;cur<=r;cur++){ ]Z>}6!
if(i1==mid+1) ;@mS^ik")$
data[cur]=temp[i2++]; y`L>wq,KU
else if(i2>r) 8EZ$g<}
data[cur]=temp[i1++]; |tKsgj
else if(temp[i1] data[cur]=temp[i1++]; g{7.r-uu
else AuvkecuIh
data[cur]=temp[i2++]; G~F b
} B7VH<;Z
} .yMEIUm
OC_+("N
} ~k"=4j9
piJu+tUy
改进后的归并排序: NN%*b yK
h){0rX@:&
package org.rut.util.algorithm.support; @D]5civm_
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import org.rut.util.algorithm.SortUtil; X1DF*wI
DHyq^pJ
/** qSM|hHDo)
* @author treeroot S.mG?zbw
* @since 2006-2-2 {AhthR%(1
* @version 1.0 -z ID x
*/ A`N,
public class ImprovedMergeSort implements SortUtil.Sort { pI1-cV,`
;dkYf24
private static final int THRESHOLD = 10; =-0/k;^
)%`c_FL@N=
/* &DS/v)]
* (non-Javadoc) xzdf^Ce
* GF"hx`zyJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {dhXIs
*/ _:ReN_0
public void sort(int[] data) { z{8bvuE
int[] temp=new int[data.length]; KWq+PeB5TS
mergeSort(data,temp,0,data.length-1); dph{74Dc
} '3R`lv
WO7z
private void mergeSort(int[] data, int[] temp, int l, int r) { )!3V/`I
int i, j, k; /}((l%UE.
int mid = (l + r) / 2; u0}vWkn\4
if (l == r) ]P9l jwR
return; B |5]Jm]
if ((mid - l) >= THRESHOLD) 4(#'_jS
mergeSort(data, temp, l, mid); 1NbG>E#Ol
else MS nG3]{z
insertSort(data, l, mid - l + 1); %2}-2}[>
if ((r - mid) > THRESHOLD) ADz ^\
mergeSort(data, temp, mid + 1, r); fZ6MSAh
else 2+RUTOv/d
insertSort(data, mid + 1, r - mid); VRVO-Sk
M f}~{+
for (i = l; i <= mid; i++) { c_dVWh e
temp = data; zKyyU}LHH
} I )~GZ
for (j = 1; j <= r - mid; j++) { ;d@#XIS&-(
temp[r - j + 1] = data[j + mid]; !`M,XSp(
} 3#WT.4k
int a = temp[l]; h!M
int b = temp[r]; %Si6]3-^@
for (i = l, j = r, k = l; k <= r; k++) { FDv<\2+ c
if (a < b) { X1:V<,}"
data[k] = temp[i++]; aFl;BhM
a = temp; i"1Mfz~e
} else { O+nEXS\rQ
data[k] = temp[j--]; Hf%@3X
b = temp[j]; k)i3
} W6^5YH%
} ISzqEi
} $6#CqWhI
L,HhbTRca
/** Je';9(ZK
* @param data gl~ecc
* @param l Z< 1
* @param i 3BzNi'
*/ !-g{[19\
private void insertSort(int[] data, int start, int len) { ]dF ,:8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9G9t" {
} ?Lx24*5%
} |{&{
} d}OTO10
} ,xw#NG6
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堆排序： .fn\]rUv
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package org.rut.util.algorithm.support; a`wc\T^
biLs+\C
import org.rut.util.algorithm.SortUtil; Tg7an&#
FX;QG94!
/** %9 SJ E
* @author treeroot i9rN9Mq?O
* @since 2006-2-2 j SHk{T!J
* @version 1.0 .L+6 $8m
*/ /hpY f]t
public class HeapSort implements SortUtil.Sort{ c|f<u{'
l\f*d6o
/* (non-Javadoc) J;S (>c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &PL8|w
*/ !:)s"|=
public void sort(int[] data) { bes<qy
MaxHeap h=new MaxHeap(); 4M^=nae
h.init(data); oxr#7Ei0d
for(int i=0;i h.remove(); yyR0]NzYUD
System.arraycopy(h.queue,1,data,0,data.length); pk>^?MO
} )i6mzzj5
&`h{iK7
private static class MaxHeap{ !'Ak&j1:`
Plc-4y1
void init(int[] data){ f<GhkDPm>?
this.queue=new int[data.length+1]; Yh7rU?Gj
for(int i=0;i queue[++size]=data; |O3q@
fixUp(size); 8aZ=?_gvT
} V[mT<Lc
} 2v:]tj
Pi=+/}
private int size=0; ;$HftG>B
x-XD.qh7Hr
private int[] queue; Z~GL5]S
-7SAK1c$
public int get() { 1eA7>$w}[
return queue[1]; QemyCCP+
} fAF1"4f
S2E8Gq9
public void remove() { 7 G)ZN{'
SortUtil.swap(queue,1,size--); 65L6:}#
fixDown(1); _ "E$v&_
} {M3qLf~z#C
file://fixdown S&e0u%8mc
private void fixDown(int k) { I) rCd/
int j; e4-@f%5
while ((j = k << 1) <= size) { 9X[kEl
if (j < size %26amp;%26amp; queue[j] j++; u\a#{G;Z
if (queue[k]>queue[j]) file://不用交换 r+'qd)
break; eJ,/:=QQ{
SortUtil.swap(queue,j,k); r=Gks=NX"
k = j; oL-]3TY~
} Y=%tn8<
} MvuQz7M#d
private void fixUp(int k) { % BVs47g
while (k > 1) { Y$o<6[7
int j = k >> 1; z__EYh
if (queue[j]>queue[k]) 4Xgg%@C
break; >1s* at/h
SortUtil.swap(queue,j,k); >/{@C
k = j; w2Us!<x
} &]V.S7LC#
} 7Sf bx~48
H[m:0eF'5
} uyO/55;HO
f0A{W/0n
} 'SO %)B
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SortUtil： i1UiNJh86
Ha(c'\T(\
package org.rut.util.algorithm; dW_KU}
j >Ht@Wi
import org.rut.util.algorithm.support.BubbleSort; imo$-}A
import org.rut.util.algorithm.support.HeapSort; #TeG-sFJg@
import org.rut.util.algorithm.support.ImprovedMergeSort; B3:ez jj
import org.rut.util.algorithm.support.ImprovedQuickSort; B#exHf8
import org.rut.util.algorithm.support.InsertSort; w2;eh]k
import org.rut.util.algorithm.support.MergeSort; AmvEf
import org.rut.util.algorithm.support.QuickSort; }\hVy(\c
import org.rut.util.algorithm.support.SelectionSort; x`U^OLV
import org.rut.util.algorithm.support.ShellSort; 'g6\CZw(#
tG:25T0
/** .>q8W
* @author treeroot =FlDb 5t{
* @since 2006-2-2 Z|%_&M
* @version 1.0 r~E=4oB7
*/ Az9?Ra;U
public class SortUtil { Gp1?iX?ml
public final static int INSERT = 1; 1!ii;s^e
public final static int BUBBLE = 2; R"4Vtww
public final static int SELECTION = 3; 1=r#d-\tR
public final static int SHELL = 4; j@=%_^:i
public final static int QUICK = 5; R}'bP
public final static int IMPROVED_QUICK = 6; R(!s
public final static int MERGE = 7; !-ok"k0,u
public final static int IMPROVED_MERGE = 8; 6rh5h:
public final static int HEAP = 9; W~6EEyD%
$}RJ,%~'x
public static void sort(int[] data) { bG7O
sort(data, IMPROVED_QUICK); cq5jPZ}
} 1G"z<v B
private static String[] name={ ;}7Rjl#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E08klC0
}; >x/z7v?^I
k;2GEa]w
private static Sort[] impl=new Sort[]{ wZG\>9~
new InsertSort(), l-fi%Z7C
new BubbleSort(), 3Q"<<pi!~
new SelectionSort(), lun#^J
new ShellSort(), 1uG"f<TsR
new QuickSort(), "&%I)e^
new ImprovedQuickSort(), 0+iu(VbF
new MergeSort(), Y}x>t* I
new ImprovedMergeSort(), ht7l- AK
new HeapSort() 00'%EYO
}; :X0k]p
%WSo b@f8
public static String toString(int algorithm){ s&A} h
return name[algorithm-1]; BD68$y
} @"hb) 8ng
nePfuG]Q
public static void sort(int[] data, int algorithm) { N<|@ymi
impl[algorithm-1].sort(data); kEJj=wx
} .GV;+8HzS
zepm!JR1
public static interface Sort { x%}^hiO<q
public void sort(int[] data); ,">]`|?
} 8hXl%{6d3
RzxNbeki[W
public static void swap(int[] data, int i, int j) { ;P;-}u
int temp = data; =V-A@_^!c
data = data[j]; a,xycX:U
data[j] = temp; ks"|}9\%<
} S-Wzour,
} %kv0Wefs