[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; ?o$6w(]''
} -OZXl
int i1=l; iW+ZI6@
int i2=mid+1; ;S"^O AM
for(int cur=l;cur<=r;cur++){ \A*#a9"
if(i1==mid+1) c_x6FoE;L
data[cur]=temp[i2++]; POfvs]
else if(i2>r) ;gTdiwfgZ=
data[cur]=temp[i1++]; <tMiI)0%
else if(temp[i1] data[cur]=temp[i1++]; sKB])mf]
else |L.QIr,jCC
data[cur]=temp[i2++]; `Q<hL{AH
} <<6i6b
} 5'?K(Jdmp
bT,]=h"0
} U PGS
acdaDY
改进后的归并排序: 4(& W>E
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package org.rut.util.algorithm.support; R"];`F(#
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import org.rut.util.algorithm.SortUtil; H5S>|"`e`e
Q*ZqY
/** Z9cch-u~
* @author treeroot iyc}a6g
* @since 2006-2-2 qm4 Ejc<
* @version 1.0 ;yqJEj_m(
*/ ce.'STm=
public class ImprovedMergeSort implements SortUtil.Sort { (\e,,C%;
W=&\d`><k
private static final int THRESHOLD = 10; 0rxlN [Yp
pjvChl5
/* q!$ZBw-7>A
* (non-Javadoc) d2'9C6t
* {vx{Hwyv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aDm$^yP
*/ ,jQkR^]j-
public void sort(int[] data) { -1Yt3M&
int[] temp=new int[data.length]; j0>S)Q
mergeSort(data,temp,0,data.length-1); 3P\#moJ
} p )etl5
.wtb7U;7
private void mergeSort(int[] data, int[] temp, int l, int r) { #yFDC@gH1
int i, j, k; id\0yRBt
int mid = (l + r) / 2; 5O#CdN-S
if (l == r) 2.p7fu
return; =Jg5J5
if ((mid - l) >= THRESHOLD) h2`W~g_
mergeSort(data, temp, l, mid); yP :>vFd7
else ~!E%GCyFy
insertSort(data, l, mid - l + 1); 6c^2Nl8e
if ((r - mid) > THRESHOLD) QY8I_VF
mergeSort(data, temp, mid + 1, r); >7!4o9)c
else B%6>2S=E
insertSort(data, mid + 1, r - mid); 1?]Gl+}
w{?nX6a@p
for (i = l; i <= mid; i++) { Jt43+]
temp = data; HB\<nK
} ELk$lm&@
for (j = 1; j <= r - mid; j++) { {oy(08`6
temp[r - j + 1] = data[j + mid]; yyPkjUy[
} MlkTrKdGi
int a = temp[l]; AA;\7;k{
int b = temp[r]; eG72=l)Mz
for (i = l, j = r, k = l; k <= r; k++) { yeFt0\=H
if (a < b) { $u|p(E:*
data[k] = temp[i++]; 4Smno%jq
a = temp; <:-|>R".
} else { @2v L'6
data[k] = temp[j--]; i*:lZeU61
b = temp[j]; v}Gq.(b
} j/TsHJ=
} -MbnYs)
} hzg&OW=:
"G)-:!H
/** nmn$$=~)
* @param data w}zl=w{G
* @param l KV k 36;$
* @param i ld-c?
*/ 5u'"m<4
private void insertSort(int[] data, int start, int len) { ^Jcs0c @\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yBXdj`bV
} ^:5;H=.
} %a<N[H3NV@
} SouPk/-B80
} @aN<nd`q)
n7i;^=9mM
堆排序： IFlDw}M!9
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package org.rut.util.algorithm.support; / *Z(;-
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import org.rut.util.algorithm.SortUtil; )TnxsFC
0$b)@
/** {-2I^Ym 5i
* @author treeroot ~=aD*v<3d
* @since 2006-2-2 mg[=~&J^
* @version 1.0 PEW^Vl-6q
*/ W&q]bi@C
public class HeapSort implements SortUtil.Sort{ ` :eXXE
UBs'3M
/* (non-Javadoc) m]R< :_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,Bk mf|
*/ kIWQ _2
public void sort(int[] data) { 8G`fSac`
MaxHeap h=new MaxHeap(); %*>=L$A
h.init(data); !e*Q2H+
for(int i=0;i h.remove(); Pni
System.arraycopy(h.queue,1,data,0,data.length); t%Vc1H2}
} $`(}ygmP
" |[w.`
private static class MaxHeap{ &?f{.
&%+}bt5
void init(int[] data){ T~J6(,"
this.queue=new int[data.length+1]; R(@B4M2
for(int i=0;i queue[++size]=data; ,-myR1}
fixUp(size); ^s\(2lB\F
} aFjcyD
} Ki(qA(r
d@#!,P5`
private int size=0; fdc ?`4
xPWzm hF
private int[] queue; !*HH5qh6
TUHC[#Vb?
public int get() { f]L`^WU
return queue[1]; /5 B{szf
} 2>p K
58\Rl
public void remove() { bq/m?;
SortUtil.swap(queue,1,size--); {P"$;_Y"<
fixDown(1); D+lzISp~e
} +ObP[F
file://fixdown 7(rNJPrU~=
private void fixDown(int k) { mYJ%gdTpo
int j; srXGe`VL
while ((j = k << 1) <= size) { .Qm"iOyM
if (j < size %26amp;%26amp; queue[j] j++; 5+\[x`
if (queue[k]>queue[j]) file://不用交换 mnZ/rb
break; ~B;kFdcVXn
SortUtil.swap(queue,j,k); 3[B*l@}j
k = j; C&YJvMu
} |Wd]:ijJ
} `9E:V=
private void fixUp(int k) { @GDe{GG+
while (k > 1) { secD `]
int j = k >> 1; _TfG-Ae
if (queue[j]>queue[k]) |=L~>G
break; ^2%_AP0=
SortUtil.swap(queue,j,k); :IlRn`9X`
k = j; [* ,k
} ,*$L_itL
} `WQz_}TqB
/yPFts_q
} ,~u5SR
F$<>JEdX
} Nd'+s>d0
XdE#l/#
SortUtil： `T7gfb%1-3
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package org.rut.util.algorithm; S+Z_Qf
GEj/Z};;[b
import org.rut.util.algorithm.support.BubbleSort; \ofWD{*j
import org.rut.util.algorithm.support.HeapSort; 1;?n]L`T
import org.rut.util.algorithm.support.ImprovedMergeSort; mz$)80ly
import org.rut.util.algorithm.support.ImprovedQuickSort; /\34o{
import org.rut.util.algorithm.support.InsertSort; EvSo|}JA[
import org.rut.util.algorithm.support.MergeSort; ]Q1?Ox:'
import org.rut.util.algorithm.support.QuickSort; X`xmV!
import org.rut.util.algorithm.support.SelectionSort; C"}CD{<H]M
import org.rut.util.algorithm.support.ShellSort; KU#w%
Q%)da)0:c
/** #$7d1bx
* @author treeroot r'0IAJ-;
* @since 2006-2-2 12qX[39/
* @version 1.0 lx_jy>$}r
*/ vVB8zS~l ,
public class SortUtil { {:BAh5e|
public final static int INSERT = 1; Y'7f"W
public final static int BUBBLE = 2; JAJo^}}{b
public final static int SELECTION = 3; r LQBaT7t#
public final static int SHELL = 4; CeQL8yJ;
public final static int QUICK = 5; {R<0'JU
public final static int IMPROVED_QUICK = 6; ziZLw$)
public final static int MERGE = 7; *W,tq(%tQ
public final static int IMPROVED_MERGE = 8; k+#6
public final static int HEAP = 9; ;D.a |(Q
le60b@2G0
public static void sort(int[] data) { .<&o,D
sort(data, IMPROVED_QUICK); aVkgE>
} NwPGH=V
private static String[] name={ j#L"fW^GM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s|B
}; eGcc'LBr;
F]o&m::/K
private static Sort[] impl=new Sort[]{ SNqw2f5
new InsertSort(), ;[@);-9q
new BubbleSort(), q)0?aL
new SelectionSort(), Xq:jp+WSG
new ShellSort(), &/QdG= r+
new QuickSort(), 7|Z=#3INw
new ImprovedQuickSort(), _+Tq&,_:o
new MergeSort(), ^ [FK<9
new ImprovedMergeSort(), lh^-L+G:Ok
new HeapSort() L3}n(KAJj
}; M~%~y`D^
);EW(7KeL
public static String toString(int algorithm){ XG_h\NIL
return name[algorithm-1]; %]NaHf
} 6{Y3-Pxg
.}IxZM[}D
public static void sort(int[] data, int algorithm) { B-'oB>|
impl[algorithm-1].sort(data); NqyKR&;
} $Ro]]NUz|
Mn$w_Z?
public static interface Sort { K+2k}Hx6J
public void sort(int[] data); o[Ojl.r<
} I ACpUB
V9aGo#
public static void swap(int[] data, int i, int j) { iA*^`NMaT
int temp = data; ^na8d's:
data = data[j]; ]?KTw8j}
data[j] = temp; MR4e.+#E
} }/)vOUcEd
} ^3~+|A98M