[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; &]F3#^!^
} @MiH(.Dq
int i1=l; }4&/VvN
int i2=mid+1; nv0#~UgE#a
for(int cur=l;cur<=r;cur++){ l30Y8t~d
if(i1==mid+1) !R'g59g
data[cur]=temp[i2++]; UMU2^$\iS
else if(i2>r) +bA%
data[cur]=temp[i1++]; J0Z7l
else if(temp[i1] data[cur]=temp[i1++]; 6cz/n8Mg
else >|g?wC}V;
data[cur]=temp[i2++]; aI3CNeav
} _{4^|{>Pv
} f>2MI4nMG
wM~H(=s`D
} +1rkq\{l
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改进后的归并排序: 5'KA'>@
),(V6@Z?
package org.rut.util.algorithm.support; /(hUfYm0
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import org.rut.util.algorithm.SortUtil; [;A[.&6
u 8^{
/** /mA,F;
* @author treeroot X6\ sF"E
* @since 2006-2-2 =-"c*^$]
* @version 1.0 NX[4PKJ0C
*/ /Fgw$ ^H
public class ImprovedMergeSort implements SortUtil.Sort { -F@L}|
aC%&U4OS
private static final int THRESHOLD = 10; E{E0Z9t7&
t)f-mQz)
/* S<`I Jpkv
* (non-Javadoc) k*?I>%^6#T
* "%qzj93>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jrxz'9qRG
*/ &@% $2O.3
public void sort(int[] data) { {pL+2%`~
int[] temp=new int[data.length]; %}-?bHB1c
mergeSort(data,temp,0,data.length-1); G2Vv i[c
} P 43P]M2
}}&#|)Yq
private void mergeSort(int[] data, int[] temp, int l, int r) { ^uBxgWIC
int i, j, k; ? *>]")[>
int mid = (l + r) / 2; v{aq`uH
if (l == r) :Dt~e|
return; - e"jw#B
if ((mid - l) >= THRESHOLD) .,0bE
mergeSort(data, temp, l, mid); =WIJ>#Go<
else :,B7-kBw
insertSort(data, l, mid - l + 1); X]%itA
if ((r - mid) > THRESHOLD) *v ?m6R=)h
mergeSort(data, temp, mid + 1, r); A A^{B
else zCv"]%
insertSort(data, mid + 1, r - mid); #bH_Dg5I
c(#;_Ve2P
for (i = l; i <= mid; i++) { MUnEuhXTr
temp = data; [F!Y%Zp
} A@hppaP!
for (j = 1; j <= r - mid; j++) { U8.7>ENnP&
temp[r - j + 1] = data[j + mid]; _>+8og/%@
} ]hos+;4p
int a = temp[l]; +{<#(}
int b = temp[r]; ^D%FX!$
for (i = l, j = r, k = l; k <= r; k++) { ziPR>iz-
if (a < b) { YNwp/Y
data[k] = temp[i++]; km~Ll
a = temp; br-]fE.be
} else { AN!s{7V3
data[k] = temp[j--]; :cB=SYcC%
b = temp[j]; oVFnlA
} ;oZ)Wt
} R;,g1m|]
} 0:w"M<80
eET&pP3Rp
/** AIMSX]m
* @param data R^?/' dr
* @param l 2c6g>?
* @param i |L2SFB?d=
*/ ?;[w" `"
private void insertSort(int[] data, int start, int len) { wLc4Dm*V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1 zw*/dp
} *(C(tPhC
} wE+${B03
} .*m>\>Gsgw
} J'$>Gk]
@)o^uU T
堆排序： !?c|XdjZ
8Nu=^[qwQM
package org.rut.util.algorithm.support; /xtq_*I1S
I:K"'R^
import org.rut.util.algorithm.SortUtil; {|I;YDA
hGpv2>M
/** y;_% W
* @author treeroot Pj}66.
* @since 2006-2-2 UMAgA!s
* @version 1.0 Zm6{n'
*/ zR2B- &]H
public class HeapSort implements SortUtil.Sort{ Tg!m`9s+
_S>JKz
/* (non-Javadoc) I(S`j[U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (=7Cs
*/ eek7=Z
public void sort(int[] data) { th;{V%:LW
MaxHeap h=new MaxHeap(); *98$dQR$
h.init(data); 6I@h9uIsze
for(int i=0;i h.remove(); n{6G"t:^l
System.arraycopy(h.queue,1,data,0,data.length); !pD*p)`s
} BD(Z5+EU1
L4!{h|
private static class MaxHeap{ ~\J}Kqg
tH-C8Qxy
void init(int[] data){ ,^uEYT}j
this.queue=new int[data.length+1]; RzWXKBI\E]
for(int i=0;i queue[++size]=data; 0#nPbe,Lj
fixUp(size); ~ 4kc/a
} #B4%|v;`E?
} T}8Y6N<\m
6i1LjLB
private int size=0; #Y$hNQQ$F
?Y@N`S
private int[] queue; z CvKDlL
zux{S;:?
public int get() { iyg*Xbmi~.
return queue[1]; %}%Qc6.H
} Z]B~{!W1
@nux9MX<9
public void remove() { v%q0OX>9X"
SortUtil.swap(queue,1,size--); <yd{tD$A*
fixDown(1); 3\XU_Xs(]
} HSc~*Q
file://fixdown 1fpQLaT
private void fixDown(int k) { %44leINx
int j; UEguF&
while ((j = k << 1) <= size) { ljb7oA3cP4
if (j < size %26amp;%26amp; queue[j] j++; =>_\fNy
if (queue[k]>queue[j]) file://不用交换 m6w].-D8
break; p>4-s, W
SortUtil.swap(queue,j,k); dw*_(ys
k = j; #`)(e JF
} >Wv;R2|
} A<??T[
private void fixUp(int k) { ~^1{B\I
while (k > 1) { 7eAX*Kgt<_
int j = k >> 1; ev*k*0
if (queue[j]>queue[k]) Ru>MFG
break; oM>Z;QVRC:
SortUtil.swap(queue,j,k); G|!on<l&
k = j; ?.Ca|H<
} s+<Yg$)
} .=s&EEF
EwvoQ$#jv
} g\&g N
a ?)NC
} AJF#Aw `o
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SortUtil： uC(V
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package org.rut.util.algorithm; G;l_|8<t#\
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import org.rut.util.algorithm.support.BubbleSort; oU.R2\Q
import org.rut.util.algorithm.support.HeapSort; zd >t-?g
import org.rut.util.algorithm.support.ImprovedMergeSort; <nT +$
import org.rut.util.algorithm.support.ImprovedQuickSort; (2$p{Uf
import org.rut.util.algorithm.support.InsertSort; HK2[]G
import org.rut.util.algorithm.support.MergeSort; ?gt l)q
import org.rut.util.algorithm.support.QuickSort; %5"9</a&G
import org.rut.util.algorithm.support.SelectionSort; G$F<$
import org.rut.util.algorithm.support.ShellSort; Wa{`VS
[q8 P~l
/** )QU
* @author treeroot ! t?iXZ
* @since 2006-2-2 @emK1iwm
* @version 1.0 Ezd_`_@R
*/ J;8IY=
public class SortUtil { ,)Znb=
public final static int INSERT = 1; 4\8+9b\9"
public final static int BUBBLE = 2; 1cpiHZa
public final static int SELECTION = 3; jK& h~)
public final static int SHELL = 4; 5>D>% iaHv
public final static int QUICK = 5; Q7jb'y$ozO
public final static int IMPROVED_QUICK = 6; h7lDHIQf
public final static int MERGE = 7; "hH.#5j
public final static int IMPROVED_MERGE = 8; l~w2B>i)
public final static int HEAP = 9; U@uGNMKR
w"Gm;B4
public static void sort(int[] data) { of%Ktm5Qi
sort(data, IMPROVED_QUICK); @1o/0y"
} C26>BU<
private static String[] name={ 61k"p2?+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I 8`VNA&b
}; 3z{?_;bR
i@"@9n~
private static Sort[] impl=new Sort[]{ M_/7D|xl/T
new InsertSort(), q_A!'sm@)
new BubbleSort(), Vt:~q{9*k
new SelectionSort(), YIQ 4t
new ShellSort(), P3+5?.p.
new QuickSort(), 4%>$-($
new ImprovedQuickSort(), s(/;U2"e
new MergeSort(), ^/I 7|u]
new ImprovedMergeSort(), < $lCkSx<Q
new HeapSort() YNKHN2E8
}; K*LlW@
yerg=,$_i
public static String toString(int algorithm){ a|t$l=|DD
return name[algorithm-1]; XDOY`N^L
} 96( v
`{3<{wgw
public static void sort(int[] data, int algorithm) { L*xhGoC=
impl[algorithm-1].sort(data); cQy2"vtU
} zPn+V7F
"O3tq=Q
public static interface Sort { vWzm@
public void sort(int[] data); ` Mjj@[
} *\+\5pu0
PUp6Q;AdQ
public static void swap(int[] data, int i, int j) { H<i]V9r
int temp = data; 5F)C jQ
data = data[j]; [%y';`( x
data[j] = temp; [1g8*j~L
} zy/@ WFPE
} a*lh)l<KV