[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; dPbn[*:
} ~9xkiu5~
int i1=l; ^d@2Y0hH
int i2=mid+1; tRO=k34
for(int cur=l;cur<=r;cur++){ >rJ**y
if(i1==mid+1) cGR)$:
data[cur]=temp[i2++]; <*WGvCh%w
else if(i2>r) 3fA+{Y8S
data[cur]=temp[i1++]; IsShAi
else if(temp[i1] data[cur]=temp[i1++]; KVr9kcs
else GzBPI'C
data[cur]=temp[i2++]; l~w^I|M^C
} seRf q&
} /.=aA~|
CBF<53TshR
} lSlZ^.&
~( 0bqt3c
改进后的归并排序: u{h67N
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package org.rut.util.algorithm.support; I$p1^8~L
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import org.rut.util.algorithm.SortUtil; .9WOTti
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/** =mF"D:s*
* @author treeroot >3pT).wH|M
* @since 2006-2-2 TOF V`7q;3
* @version 1.0 RwYFBc
*/ ?{jey_]M
public class ImprovedMergeSort implements SortUtil.Sort { S3i p?9
#oFyi @U
private static final int THRESHOLD = 10; YM6 J:89
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/* )QRT/, ;c
* (non-Javadoc) }mzd23^W>P
* idGn{f((f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s^SU6P/]
*/ "(vK.-T
public void sort(int[] data) { Z^z{, u;!
int[] temp=new int[data.length]; 2~l7WW+lx,
mergeSort(data,temp,0,data.length-1); F_9 4k
} k52IvB@2
,msP(*qoI
private void mergeSort(int[] data, int[] temp, int l, int r) { vd(S&&]o1
int i, j, k; *S"RU~1_
int mid = (l + r) / 2; dP(.l}O
if (l == r) /d,u"_=l
return; ~*"ZF-c,
if ((mid - l) >= THRESHOLD) C:}1r
mergeSort(data, temp, l, mid); T/2k2r4PD
else ]jC{o,?s
insertSort(data, l, mid - l + 1); h#KSKKNW
if ((r - mid) > THRESHOLD) bmK
mergeSort(data, temp, mid + 1, r); 1#%H!GKvTU
else 71Za!3+
insertSort(data, mid + 1, r - mid); pgiZA?r*<
2O*At%CzW
for (i = l; i <= mid; i++) { 6W{Nw<
temp = data; +Ugy=678Tr
} > Xh=P%
for (j = 1; j <= r - mid; j++) { jex\5
temp[r - j + 1] = data[j + mid]; WW{_D
} '*65j
int a = temp[l]; dKCl#~LAI'
int b = temp[r]; 3)ox8,{%}
for (i = l, j = r, k = l; k <= r; k++) { %8|lAMTY7/
if (a < b) { -gk2$P-
data[k] = temp[i++]; i{TPf1OY`M
a = temp; R`E:`t4G
} else { -j]c(Q MA]
data[k] = temp[j--]; `B4Ilh"d
b = temp[j]; ~3M8"}X;L
} {6GX ?aw'
} az:}RE3o
} 1 :$#a
)^AZmUYZ
/** \8!CKnfs
* @param data {U$XHG
* @param l Sn4xv2/
* @param i Knqv|jJVx1
*/ JVkuSIR>
private void insertSort(int[] data, int start, int len) { m$^5{qpg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y0(.6HI
} G4*&9Wo
} 0C>_aj
} utuWFAGn A
} (lS[a
ZD'mwj+K
堆排序： 1fMV$T==K
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package org.rut.util.algorithm.support; !-^oU"
u"V,/1++\
import org.rut.util.algorithm.SortUtil; > ^zNKgSQ
7gN;9pc$
/** pZopdEFDK|
* @author treeroot m(MQ
* @since 2006-2-2 ar\|D\0V
* @version 1.0 d/j?.\
*/ >'W,8F
public class HeapSort implements SortUtil.Sort{ R:&y@/JY8[
ga/zt-&
/* (non-Javadoc) Zv!XNc!"$y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;`LG WT-<F
*/ ,$/Ld76U
public void sort(int[] data) { 5I1YB+$}e
MaxHeap h=new MaxHeap(); nRB3VsL
h.init(data); R*2N\2
for(int i=0;i h.remove(); JxwKTFU'3O
System.arraycopy(h.queue,1,data,0,data.length); !J<Xel{
} 21tv(x
J&fIWZ
private static class MaxHeap{ \V!{z;.fA
k<Gmb~Tg1
void init(int[] data){ AVw oOvJ
this.queue=new int[data.length+1]; EjFpQ|-L|
for(int i=0;i queue[++size]=data; P?f${t+
fixUp(size); @(35I
} r>ed/<_>m;
} 9v`sSTlSd
<(@S;?ZEW
private int size=0; He'VqUw_
5NUaXQ
private int[] queue; O2ktqAWx@
>I5Wf/$
public int get() { J-'XT_k:iM
return queue[1]; 1}Q9y`65
} &.DRAD)
7r'_p$
public void remove() { (?8i^T?WP=
SortUtil.swap(queue,1,size--); yUJ#LDW
fixDown(1); OM1{-W
} D C/X|f
file://fixdown hvO$ f.i
private void fixDown(int k) { ]58~b%s
int j; $Z]@N nA9N
while ((j = k << 1) <= size) { [ !#Dba#
if (j < size %26amp;%26amp; queue[j] j++; %n9ukc~$p
if (queue[k]>queue[j]) file://不用交换 "GZ}+K*GG
break; %V]v,
SortUtil.swap(queue,j,k); h M7 SGEV
k = j; 9#P~cW?
} i"iy 0?
} K/Yeh<_&
private void fixUp(int k) { ejyx[CF
while (k > 1) { 9q$^x/z!
int j = k >> 1; I*Dj@f`
if (queue[j]>queue[k]) As>Og
break; 8CRbo24"s
SortUtil.swap(queue,j,k); [zN*P$U]
k = j; us?q^>u
} DoFe:+_U3
} Z]Udx
*,CJ 3<>
} lMu9Dp
9y&;6V.'
} Xw'sh#i2
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SortUtil： 2e1%L,y{W
YYFS ({
package org.rut.util.algorithm; j0+D99{R
e#k rr
import org.rut.util.algorithm.support.BubbleSort; 1)h<)
import org.rut.util.algorithm.support.HeapSort; de2G"'F
import org.rut.util.algorithm.support.ImprovedMergeSort; fi>.X99(G
import org.rut.util.algorithm.support.ImprovedQuickSort; 7Ko*`-p
import org.rut.util.algorithm.support.InsertSort; cq?,v?m
import org.rut.util.algorithm.support.MergeSort; &l]F&-
import org.rut.util.algorithm.support.QuickSort; qF$y p>|#
import org.rut.util.algorithm.support.SelectionSort; QOUyD;0IW
import org.rut.util.algorithm.support.ShellSort; !2HF|x$
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/** r`<e<C
* @author treeroot k6z ]-XG
* @since 2006-2-2 ;}f {o^]'
* @version 1.0 |-{e!&
*/ Kgi`@`
public class SortUtil { t^KQv~
public final static int INSERT = 1; iR9duP+
public final static int BUBBLE = 2; 12'MzIsU's
public final static int SELECTION = 3; ,N,@9p
public final static int SHELL = 4; 24 [cU
public final static int QUICK = 5; u? >x
public final static int IMPROVED_QUICK = 6; cSB_b.@"1
public final static int MERGE = 7; r vq{Dfo=
public final static int IMPROVED_MERGE = 8; V6d,}Z+"z'
public final static int HEAP = 9; .!L{yU,
"O9n|B
public static void sort(int[] data) { r`sKe &
sort(data, IMPROVED_QUICK); PR!0=E*}
} Nb3O>&J
private static String[] name={ x?B`p"ifS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rp<~=X
}; G7`mK}J7
J5jI/P
private static Sort[] impl=new Sort[]{ h(AL\9{=}
new InsertSort(), R"HV|Dm|m
new BubbleSort(), @8m%*pBg
new SelectionSort(), &E0^Jz
new ShellSort(), Lz_.m
new QuickSort(), .p=J_%K}0x
new ImprovedQuickSort(), LqI&1$#
new MergeSort(), N-2_kjb!
new ImprovedMergeSort(), Bf y
new HeapSort() =&k[qqxg
}; 0Cf'\2
/mp!%j~
public static String toString(int algorithm){ h {Jio>
return name[algorithm-1]; &$2d=q8mh
} jPz1W4pk
>#&25,Q
public static void sort(int[] data, int algorithm) { N.Q}.(N0
impl[algorithm-1].sort(data); 6 F39'
} #+_=(J
iuXXFuh
public static interface Sort { ?RsPAL
public void sort(int[] data); x\ #K2
} i9qIaG/
l44QB8 9
public static void swap(int[] data, int i, int j) { 6A=k;do
int temp = data; xH` VX-X3
data = data[j]; gzvgXZ1q"
data[j] = temp; pN9U1!|uam
} LcA7f'GVK
} <6;@@