[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; )&,K94
} uH\w.
int i1=l; [zQWyDu
int i2=mid+1; E MQ4yK
for(int cur=l;cur<=r;cur++){ LWD#a~
if(i1==mid+1) U<[jT=L
data[cur]=temp[i2++]; {p]=++
else if(i2>r) (ND%}
data[cur]=temp[i1++]; m2O&2[g
else if(temp[i1] data[cur]=temp[i1++]; t8/%Dgu
else 3;l"=#5
data[cur]=temp[i2++]; Xpl?g=B&u
} oRq3 pO}f
} . :a<2sp6
n=o_1M|
} {cR=N~_EO
A=X-;N#
改进后的归并排序: QPs:RhV7
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package org.rut.util.algorithm.support; p411 `]Zf
")%r}:0
import org.rut.util.algorithm.SortUtil; xA #H0?a]
DP*@dFU"
/** utH%y\NMF|
* @author treeroot /_*>d)
* @since 2006-2-2 Qqq <e
* @version 1.0 {/|qjkT&W
*/ * t!r@k
public class ImprovedMergeSort implements SortUtil.Sort { RJ}#)cT
$r79n-
private static final int THRESHOLD = 10; ;:OsSq&
<2<87PU
/* p3yU:q#A
* (non-Javadoc) AVFjBybu9
* JJnYOau
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {Uq:Xw
*/ S_\ F
public void sort(int[] data) { l r~gG3
int[] temp=new int[data.length]; <kbyZXV@K
mergeSort(data,temp,0,data.length-1); /S~m)$vu
} _Y!sVJ){,c
8\Hr5FqB(
private void mergeSort(int[] data, int[] temp, int l, int r) { K5k?H
int i, j, k; Z<"K_bj
int mid = (l + r) / 2; -^SA8y
if (l == r) 'Cc(3
return; BsLG^f
if ((mid - l) >= THRESHOLD) CdZ BG
mergeSort(data, temp, l, mid); F]_cbM{8/
else *e/K:k
insertSort(data, l, mid - l + 1); `.v(fC
if ((r - mid) > THRESHOLD) &`Ck
mergeSort(data, temp, mid + 1, r); yI)~]K r
else VQxpN 1
insertSort(data, mid + 1, r - mid); FxRXPt FK
=yXs?y"
for (i = l; i <= mid; i++) { X_?97iXjx
temp = data; r;m`9,RW
} fly,-$K>LO
for (j = 1; j <= r - mid; j++) { YQ]\uT>}&
temp[r - j + 1] = data[j + mid]; CxF-Z7 '
} ?c#$dc"
int a = temp[l]; G>z,#Xt
int b = temp[r]; n&Yk<
for (i = l, j = r, k = l; k <= r; k++) { Qa`hR
if (a < b) { )=^w3y
data[k] = temp[i++]; t"AzI8O
a = temp; B0Xl+JIR#
} else { PQ U]l"A
data[k] = temp[j--]; 1HR~G9
b = temp[j]; RBGX_v?
} <J{'o`{
} {`"#yl6"
} " I+p
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/** Es'Um,ku
* @param data Re=WfG
* @param l z/]q)`G
* @param i mpay^.(%
*/ r)T[(D'Tm-
private void insertSort(int[] data, int start, int len) { yTBS=+X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); olYsT**'
} yL1bS|@
} r':TMhzHq?
} z1V#'$_5-
} [_6&N.
>G"X J<IO
堆排序： 6][1<}8
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package org.rut.util.algorithm.support; \5><3*\
^ 4hO8
import org.rut.util.algorithm.SortUtil; +M\8>/0oA
saZ>?Owz
/** IB5BO7J
* @author treeroot } :?.>#
* @since 2006-2-2 9'~-U
* @version 1.0 H7g< p"
*/ XhW %,/<
public class HeapSort implements SortUtil.Sort{ m <k!^jp
'cdN3i(
/* (non-Javadoc) x4K`]Fvhl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,"?A2n-qO
*/ S"2qJ!.u
public void sort(int[] data) { &Ral+J
MaxHeap h=new MaxHeap(); Ca>&
h.init(data); ~,gXaw
for(int i=0;i h.remove(); {1lO
System.arraycopy(h.queue,1,data,0,data.length); !.X.tc
} E l&h;N
3{Q,hpZN
private static class MaxHeap{ :14i?4Fd
r.3KPiYK
void init(int[] data){ 6vy7l(%
this.queue=new int[data.length+1]; ^y_fRP~
for(int i=0;i queue[++size]=data; fys
fixUp(size); LLAa1Wq
} U9d:@9Y
} Sfjje4R
yX/";Oe
private int size=0; %1U`@0
udqS'g&
private int[] queue; 7*H:Ob)9k
2 YxTMT
public int get() { d+L#t
return queue[1]; \}]iS C.2
} TYgQJW?
R4's7k
public void remove() { tykB.2f
SortUtil.swap(queue,1,size--); ! T9]/H?
fixDown(1); -e@!
} :VA.QrKW
file://fixdown H:{7X1bV
private void fixDown(int k) { E8}+k o
int j; .w? .ib(
while ((j = k << 1) <= size) { T3&`<%,f
if (j < size %26amp;%26amp; queue[j] j++; =([av7
if (queue[k]>queue[j]) file://不用交换 X=X\F@V:u
break; irBDGT~
SortUtil.swap(queue,j,k); T~8 .9g
k = j; \>/M .2
} wFn[9_`*
} VDEv>u4
private void fixUp(int k) { LxN*)[Wb
while (k > 1) { UH`hOJ?
int j = k >> 1; x2VBm$>
if (queue[j]>queue[k]) <&!]K?Q9i
break; SpTdj^]4>
SortUtil.swap(queue,j,k); ,Fqz e/
k = j; 5"Kx9n|
} 'C+;r?1!h
} r8MZvm2
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} &x:JD1T}
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} MFit|C
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SortUtil： JQKdW
zzpZ19"`1
package org.rut.util.algorithm; *=F(KZ
tOdT[&
import org.rut.util.algorithm.support.BubbleSort; P.WYTst=
import org.rut.util.algorithm.support.HeapSort; >R^@Ww;|q
import org.rut.util.algorithm.support.ImprovedMergeSort; ]n1dp2aH
import org.rut.util.algorithm.support.ImprovedQuickSort; +RZ~LA\+
import org.rut.util.algorithm.support.InsertSort; 43:t \
import org.rut.util.algorithm.support.MergeSort; EYS>0Y
import org.rut.util.algorithm.support.QuickSort; ;I6s-moq_
import org.rut.util.algorithm.support.SelectionSort; =odkz}bU
import org.rut.util.algorithm.support.ShellSort; G&{HTYP
dXvt6kF
/** X!,@j\L
* @author treeroot B;zt#H4
* @since 2006-2-2 [`fI:ao|
* @version 1.0 5OLQw(E
*/ !F4;_A`X
public class SortUtil { NC23Z0y
public final static int INSERT = 1; U\<-mXv
public final static int BUBBLE = 2; :>3=gex@^0
public final static int SELECTION = 3; 6.Ie\5-a;
public final static int SHELL = 4; ;6;H*Y0,|E
public final static int QUICK = 5; Wsz0yHD[`
public final static int IMPROVED_QUICK = 6; L^Wz vv]
public final static int MERGE = 7; F#r#}.B='U
public final static int IMPROVED_MERGE = 8; m9$:9yRm
public final static int HEAP = 9; E0f{iO;}
rs8\)\z
public static void sort(int[] data) { <lwuTow
sort(data, IMPROVED_QUICK); F3E[wdT
} 1JS2SxF
private static String[] name={ Fe=8O ^\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dDcZ!rRaL@
}; UGKaOol.
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private static Sort[] impl=new Sort[]{ [[L-jq.'
new InsertSort(), x1[?5n6
new BubbleSort(), 6vs3O
new SelectionSort(), {ISE'GJj
new ShellSort(), gSi5u#}J
new QuickSort(), I}0_nge
new ImprovedQuickSort(), 4iX-(ir,
new MergeSort(), +&v\ /
new ImprovedMergeSort(), [Eq<":)
new HeapSort() 440FhDMj
}; /XpSe<3
mV\$q@sII
public static String toString(int algorithm){ h[Tk;h
return name[algorithm-1]; wT_^'i*@I
} V0i9DK|!
"ED8z|]j
public static void sort(int[] data, int algorithm) { )iE"Tl
impl[algorithm-1].sort(data); s;.=5wcvi?
} bg7n
]|oJ)5P
public static interface Sort { l gq=GHW
public void sort(int[] data); 4('JwZw\!
} knHv?#
x7ATI[b[
public static void swap(int[] data, int i, int j) { ?l6jG
int temp = data; ^X?D#\
data = data[j]; v|@1(
data[j] = temp; 3oBC
} #+jUhxq
} *@M3p}',M