[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; a@&P\"k
} ;VAHgIpx;
int i1=l; K6l{wyMb|
int i2=mid+1; vMB`TpZ
for(int cur=l;cur<=r;cur++){ p 3*y8g-
if(i1==mid+1) @?r[ $Ea1M
data[cur]=temp[i2++]; rr=e
else if(i2>r) ij<6gv~ n"
data[cur]=temp[i1++]; Gn8'h TM
else if(temp[i1] data[cur]=temp[i1++]; yMoV|U6
else A\v(!yg
data[cur]=temp[i2++]; qu:nV"~_
} V"`t*m$
} byTTLs,}d
!ENDQ?1
} J*} warf&
@ysc?4% q
改进后的归并排序: d^sm;f
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package org.rut.util.algorithm.support; )Z0bMO<
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import org.rut.util.algorithm.SortUtil; hvO
e 1$<,.>
/** 5v`[c+@F
* @author treeroot 9cwy;au
* @since 2006-2-2 :K)7_]y
* @version 1.0 k:qS'
*/ Fb0r(vQ^
public class ImprovedMergeSort implements SortUtil.Sort { 4fyds< f
%qYiE!%&
private static final int THRESHOLD = 10; ;n~-z5)
._i|+[
/* Lq6R_udp
* (non-Javadoc) !Enq2
* 8h%oJ4da
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~stJO])a
*/ S4hv7.A
public void sort(int[] data) { !5}u\
int[] temp=new int[data.length]; P\lEfsuR
mergeSort(data,temp,0,data.length-1); Na$eeM
} !JGe .U5
R0A|}Ee*
private void mergeSort(int[] data, int[] temp, int l, int r) { TF1,7Qd
int i, j, k; ^tTASK
int mid = (l + r) / 2; Nr,Qu8
if (l == r) A 6IrA/b
return; bQlvb
if ((mid - l) >= THRESHOLD) `i:DmIoz
mergeSort(data, temp, l, mid); [^S(SPL
else @$aGVEcU$
insertSort(data, l, mid - l + 1); tg%#W`
if ((r - mid) > THRESHOLD) 6D&{+;
mergeSort(data, temp, mid + 1, r); wr-/R"fX
else uSgR|b;R]
insertSort(data, mid + 1, r - mid); 2t[P-on
srCpgs]h
for (i = l; i <= mid; i++) { Mm)yabP
temp = data; !y\r.fm!A
} L}a-c(G+8
for (j = 1; j <= r - mid; j++) { kfV}ta'^S
temp[r - j + 1] = data[j + mid]; .<Rw16O
} B{ Ab#
int a = temp[l]; :*} -,{uX
int b = temp[r]; 'EHtA9M
for (i = l, j = r, k = l; k <= r; k++) { YWFq&II|Z
if (a < b) { uo8[,'
data[k] = temp[i++]; VtN1 [}
a = temp; \'Q rJ ?D
} else { CBr(a'3{Z
data[k] = temp[j--]; !sG#3sUe[
b = temp[j]; (hJ&`Tt
} 4OaU1Y[
} J6I:UML
} [} zzG@g,J
kz\Ss|jl
/** \47djmG-
* @param data r@a]fTf
* @param l YO'aX
* @param i bEKhU\@=J
*/ %b[>eIJU#
private void insertSort(int[] data, int start, int len) { 21$E.x 6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nSv@FT'~z
} D"V(A\sZ
} s(Bcw`'#
} )Yu
} er8T:.Py
:pfLa2f+
堆排序： ?KtF!:_C
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package org.rut.util.algorithm.support; &,l(2z[
u*T(n s l
import org.rut.util.algorithm.SortUtil; "g,`Ks ];
xG(xG%J
/** mCyn:+
* @author treeroot D3B]
* @since 2006-2-2 45?%D}
* @version 1.0 ;_=N YG.
*/ PU,%Y_xR
public class HeapSort implements SortUtil.Sort{ 1Q/=s,{u
Kh$Q9$
/* (non-Javadoc) r~z'QG6v/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iInWw"VbKe
*/ WcGg
public void sort(int[] data) { Bd]k]v+
MaxHeap h=new MaxHeap(); ]|-sZ<?<i
h.init(data); xg}Q~,:
for(int i=0;i h.remove(); bksv2@ar
System.arraycopy(h.queue,1,data,0,data.length); ?I[*{}@n"
} ", p5}}/
%tMx48'N
private static class MaxHeap{ lSg[7lt
!:PiQ19 'u
void init(int[] data){ lA pZC6Iwk
this.queue=new int[data.length+1]; P8(hHuO
for(int i=0;i queue[++size]=data; wRvh/{xB
fixUp(size); =EYWiK77a
} z2>LjM) #
} [l3ys
s+?2oPa
private int size=0; gBky ZK
.g3=L
private int[] queue; &7i&"TNptP
1ysQvz
public int get() { ?-zuy US
return queue[1]; &+n9T?+b
} P)kJ[Zv>f
! ,bQ;p3g|
public void remove() { \BuyJskE
SortUtil.swap(queue,1,size--); ^)wKS]BQ..
fixDown(1); zak|* _
} a'-u(Bw
file://fixdown d:kn%L6k_
private void fixDown(int k) { QtwQVOK
int j; pI:,Lt1B
while ((j = k << 1) <= size) { .faf!3d
if (j < size %26amp;%26amp; queue[j] j++; Y hQ)M5
if (queue[k]>queue[j]) file://不用交换 ?=ffv]v|
break; J#48c'
SortUtil.swap(queue,j,k); >.6|\{*sG
k = j; f~F{@),acZ
} _1NK9dp:
} 'zM=[#!B
private void fixUp(int k) { PcBD;[cn
while (k > 1) { 7o0zny3?
int j = k >> 1; !b"?l"C+u
if (queue[j]>queue[k]) sO` oapy
break; )S 7+y6f&*
SortUtil.swap(queue,j,k); r\d(*q3B
k = j; 43pe6 ^.
} |mP};&b
} ^$50[
V^,eW!
} gfs;?vP
zGFD71=#
} a%e`
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SortUtil： J*[@M*R;&
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package org.rut.util.algorithm; #R{>@]x`
3*& Y'/!
import org.rut.util.algorithm.support.BubbleSort; 0:`|T jf_
import org.rut.util.algorithm.support.HeapSort; KW(a@X
import org.rut.util.algorithm.support.ImprovedMergeSort; 0|RofL&o
import org.rut.util.algorithm.support.ImprovedQuickSort; ?+))J~@t
import org.rut.util.algorithm.support.InsertSort; D3yTN"
import org.rut.util.algorithm.support.MergeSort; g_1#if&
import org.rut.util.algorithm.support.QuickSort; fO$){(]^
import org.rut.util.algorithm.support.SelectionSort; dYwkP^KB
import org.rut.util.algorithm.support.ShellSort; m/1FVC@*
b?l>vUgAg
/** GPGE7X'
* @author treeroot 4SZ,X^]I>
* @since 2006-2-2 1vxRhS&FY
* @version 1.0 P+0'^:J
*/ Lxwi"ndP
public class SortUtil { +U2lwd!j
public final static int INSERT = 1; "~5cz0 H3v
public final static int BUBBLE = 2; E`UkL*Q
public final static int SELECTION = 3; ;U|(rM;
public final static int SHELL = 4; Xva(R<W7d<
public final static int QUICK = 5; a(|6)w-
public final static int IMPROVED_QUICK = 6; _"ciHYHBQ
public final static int MERGE = 7; HbegdbTJ
public final static int IMPROVED_MERGE = 8; Z^:_,aJ?
public final static int HEAP = 9; )A$"COM4
DxV=S0P
public static void sort(int[] data) { =3.dgtH
sort(data, IMPROVED_QUICK); b)<WC$"
} .`}TND~
private static String[] name={ 3uocAmY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z.Ic?Wz7
}; bGCC?}\
3'Y-~^ml|
private static Sort[] impl=new Sort[]{ ^Hv&{r77
new InsertSort(), px<psR5
new BubbleSort(), pL"{Uqi
new SelectionSort(), x ;|HT
new ShellSort(), :QGkYJ
new QuickSort(), $<v4c5r]O
new ImprovedQuickSort(), dS ojq6M
new MergeSort(), 2%sZaM
new ImprovedMergeSort(), (dq_,LI
new HeapSort() =/Gd<qz3
}; nzC *mPX8
uQIPnd(V
public static String toString(int algorithm){ Jy)=TJ!y
return name[algorithm-1]; w'K7$F51
} CefFUqo4
TQ]gvi|m
public static void sort(int[] data, int algorithm) { +@QrGY
impl[algorithm-1].sort(data); gx.\H3y
} In1W/?
;OlnIxH(W
public static interface Sort { 1'qXT{f/~
public void sort(int[] data); ~.:{ Ik]
} :C*}Yg
]E-/}Ysz
public static void swap(int[] data, int i, int j) { V: D;?$Jl
int temp = data; a9-Mc5^'n
data = data[j]; p^pd7)sBr
data[j] = temp; M0w Uis:`
} = LNU%0m
} qWhW4$7x