[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; d"U'\ID2y
} ! a!^'2
int i1=l; 3:ELYn
int i2=mid+1; V|`w/P9g4
for(int cur=l;cur<=r;cur++){ g3Z"ri~!G
if(i1==mid+1) eX3|<Bf
data[cur]=temp[i2++]; 3@8Zy:[8<
else if(i2>r) kl[Jt)"4@
data[cur]=temp[i1++]; oa q!<lI
else if(temp[i1] data[cur]=temp[i1++]; dm`:']?
else U0fr\kM
data[cur]=temp[i2++]; z5q(
} c)B <d#
} 9JBVG~m+
25wvB@0&
} -?Kd[Ma
K^f&+`v6_
改进后的归并排序: &wea]./B
Q35jJQ$<`
package org.rut.util.algorithm.support; #y>q)Ph
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import org.rut.util.algorithm.SortUtil; ^w6~?'}
-hpC8YS
/** )gPkL r
* @author treeroot !'f.g|a
* @since 2006-2-2 ,%4~ulKMn
* @version 1.0 W)p?cK`
*/ <4,LTB]9-
public class ImprovedMergeSort implements SortUtil.Sort { g7@.Fa.u'!
2{oU5e
private static final int THRESHOLD = 10; "^&Te%x_b
]GH_;
/* *h4x`luJ
* (non-Javadoc) S*w;$`Y
* >4iVVs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9~ rYLR(v
*/ JK9 J;c#T
public void sort(int[] data) { Kk|4
int[] temp=new int[data.length]; K!jMW
mergeSort(data,temp,0,data.length-1); )7;E,m<:tO
} gq~6jf>
rfHAz
private void mergeSort(int[] data, int[] temp, int l, int r) { 1|/-Ff"1@
int i, j, k; F|! ib5
int mid = (l + r) / 2; F7lzc)
if (l == r) 56 [+;*
return; 6H'W]T&
if ((mid - l) >= THRESHOLD) .F^372hH3
mergeSort(data, temp, l, mid); JGG(mrvR
else 7L !$hk
insertSort(data, l, mid - l + 1); ;+(EmD:Q
if ((r - mid) > THRESHOLD) .g8db d
mergeSort(data, temp, mid + 1, r); ds "N*\.
else 9D,/SZ-v
insertSort(data, mid + 1, r - mid); rJw Ws
U])$#/ v
for (i = l; i <= mid; i++) { vHM,_I{
temp = data; w7`09oJm
} WNcJ710k27
for (j = 1; j <= r - mid; j++) { %Gc)$z/Wd
temp[r - j + 1] = data[j + mid]; Xn #v!
} Z>(K|3_
int a = temp[l]; j7sRmQCl
int b = temp[r]; UtYwG#/w
for (i = l, j = r, k = l; k <= r; k++) { U C..)9
if (a < b) { 7 DW_G
data[k] = temp[i++]; TS49{^d$
a = temp; HtAO9
} else { "[`/J?W
data[k] = temp[j--]; 2!Sl!x+i\'
b = temp[j]; Pt\GVWi_t
} HMl M!Xk?
} H}PZJf_E
} lqZUU92;
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/** TaNcnAY>9
* @param data +Z1y1%a
* @param l 9*;OHoDh
* @param i <Oihwr@5<
*/ <}('w/
private void insertSort(int[] data, int start, int len) { b/6!>qMMk%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #iVr @|,
} 5h@5.-}
} _qvzZ6
} Sgq" 3(+%,
} |DkK7gw
M&J$9X
堆排序： 'h3yxf}\
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package org.rut.util.algorithm.support; HC(7,3
<Wa7$hF
import org.rut.util.algorithm.SortUtil; \Y^GA;AMQQ
"a=dx| Z
/** 6S&OE k
* @author treeroot m,^UD{
* @since 2006-2-2 X-j3=8wPM
* @version 1.0 @@"abhT
*/ JL!:`#\
public class HeapSort implements SortUtil.Sort{ (g3@3.Kk)
5j>olz=n}
/* (non-Javadoc) /33m6+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9?zi
*/ xFp?+a
public void sort(int[] data) { 9^1li2zk{
MaxHeap h=new MaxHeap(); @~C C$Y$
h.init(data); ,&iZ*6=X?0
for(int i=0;i h.remove(); 0P^&{ek+)
System.arraycopy(h.queue,1,data,0,data.length); Qv;q*4_
} M%v 6NxN
sj8lvIY5
private static class MaxHeap{ ;fxrOfb
i<-a-Z+^
void init(int[] data){ 4;V;8a\A
this.queue=new int[data.length+1]; NEW0dF&)
for(int i=0;i queue[++size]=data; qx";G
fixUp(size); L17{W4
} k~IRds@G
} [Y-3C47
Z}yd`7
private int size=0; St;@ZV
SdNxSD$Q
private int[] queue; RW|Xh8.O
9"cyZO
public int get() { a Juv{
return queue[1]; @Zw[LIQ*
} mu$rG3M
nQ08(8
public void remove() { }S 6h1X
SortUtil.swap(queue,1,size--); PasVfC@
fixDown(1); C"R}_C|r)*
} &x)nK
file://fixdown >9,:i)m_
private void fixDown(int k) { 0S&C[I o6
int j; K96N{"{iI%
while ((j = k << 1) <= size) { Mk8k,"RG&Z
if (j < size %26amp;%26amp; queue[j] j++; 9\!=i
if (queue[k]>queue[j]) file://不用交换 Rh%C$d(
break; Svt%*j
SortUtil.swap(queue,j,k); {Lugdf'
k = j; x{9$4d
} ,jdTe?[*^
} 52.%f+Oa
private void fixUp(int k) { zvR;Tl6]
while (k > 1) { iiv`ji
int j = k >> 1; C@!bd+'
if (queue[j]>queue[k]) m*vz
break; ?$.x%G+
SortUtil.swap(queue,j,k); cf%aOHYI*
k = j; E'^ny4gL
} j9f[){m`
} "GX k;Y
N14Q4v-*x
} 5,9cD`WR^
\]0+J
} =}'7}0M_=
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SortUtil： 5V8`-yO9
cp2a @
package org.rut.util.algorithm; -%TwtO<$']
e, }{$HStZ
import org.rut.util.algorithm.support.BubbleSort; d#|%h] 6
import org.rut.util.algorithm.support.HeapSort; G6pR?K+
import org.rut.util.algorithm.support.ImprovedMergeSort; V)]lca
import org.rut.util.algorithm.support.ImprovedQuickSort; CPcB17!
import org.rut.util.algorithm.support.InsertSort; X3HJ3F;==
import org.rut.util.algorithm.support.MergeSort; %J+k.UrM
import org.rut.util.algorithm.support.QuickSort; uvJmEBL:
import org.rut.util.algorithm.support.SelectionSort; #6mr'e1
import org.rut.util.algorithm.support.ShellSort; xtK}XEhG!
6\USeZh
/** @?5pY^>DK
* @author treeroot @./@"mR<
* @since 2006-2-2 *0Wkz'=U
* @version 1.0 J3hhh(
*/ V$bq|r
public class SortUtil { u3\_![Jt?
public final static int INSERT = 1; ?f:ND1jU
public final static int BUBBLE = 2; J|CCTXT
public final static int SELECTION = 3; 3{M0iNc1
public final static int SHELL = 4; IwR=@Ne8
public final static int QUICK = 5; X0]Se(
public final static int IMPROVED_QUICK = 6; WF-^pfRq~
public final static int MERGE = 7; I].ddR%
public final static int IMPROVED_MERGE = 8; 7>f)pfLM
public final static int HEAP = 9; ~^>g<YR[
BiA^]h/|
public static void sort(int[] data) { K0\`0E^,
sort(data, IMPROVED_QUICK); kH?PEA! \
} Ymm*p,`
private static String[] name={ _ygdv\^Tet
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DTl&V|h$
}; .J?RaH{i
ik5"9b-\<
private static Sort[] impl=new Sort[]{ I5E+=.T*ar
new InsertSort(), et<@3wyd]
new BubbleSort(), ihD|e&
new SelectionSort(), '![VA8
new ShellSort(), G0(A~Q"
new QuickSort(), e}ivvs2
new ImprovedQuickSort(), $]MOAj"LH
new MergeSort(), Q}uh`?t
new ImprovedMergeSort(), wsgT`M'J[
new HeapSort() Yu:($//w
}; o(D6
M $zt;7P|
public static String toString(int algorithm){ O@>{%u
return name[algorithm-1]; at(gem
} (I;lE*>
TIxlLOs
public static void sort(int[] data, int algorithm) { 0>:`|IGnT2
impl[algorithm-1].sort(data); NN~PWy1opa
} $'KhA6u
i}@5<&J
public static interface Sort { =Ds&ArG
public void sort(int[] data); ~zDFL15w
} JC9OL.Ob
`[~LMV&2U
public static void swap(int[] data, int i, int j) { sI@kS^
int temp = data; A+VzpJ~
data = data[j]; ^+Njz{rpG
data[j] = temp; z5W;-sCz
} J7k=5Fqej;
} zwK$ q=-: