[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; "cS7E5-|
} 5~>j98K
int i1=l; ~Y0K Wx4
int i2=mid+1; ;"f9"
for(int cur=l;cur<=r;cur++){ &'neOf/~
if(i1==mid+1) f*V^HfiQb
data[cur]=temp[i2++]; p%Q{Rqc)
else if(i2>r) e`B!)Sr
data[cur]=temp[i1++]; zp4@T)
else if(temp[i1] data[cur]=temp[i1++]; ;B<rw^h5
else + S5uxO
data[cur]=temp[i2++]; |-v/
} UU}Hs}
} A?-t`J
d:Z|It
} )-XD= ]
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改进后的归并排序: C(sz/x?11
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package org.rut.util.algorithm.support; n\7>_
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import org.rut.util.algorithm.SortUtil; W-D4" G@
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/** ld%#.~Q
* @author treeroot :\mdVS!o
* @since 2006-2-2 <}mA>c'k
* @version 1.0 l"&iSq!3=
*/ W`[7|8(6!
public class ImprovedMergeSort implements SortUtil.Sort { $Q|6W &?[;
TJcHqzcUc
private static final int THRESHOLD = 10; F)l1%FCm
PTpfa*t
/* <,*w$
* (non-Javadoc) ko{&~
* yqJ>Z%)hf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .K_50%s
*/ 0m4#{^Y
public void sort(int[] data) { g5nL7;`N
int[] temp=new int[data.length]; Vs>e"czfm/
mergeSort(data,temp,0,data.length-1); EE9eG31|r
} ?+c-m+;wj
8XfOMf~d`
private void mergeSort(int[] data, int[] temp, int l, int r) { )):D&wlq
int i, j, k; -hK^*vJ
int mid = (l + r) / 2; SQ/}K8uZ
if (l == r) '\pSUp
return; 5:~ zlg
if ((mid - l) >= THRESHOLD) W$}2 $}r0U
mergeSort(data, temp, l, mid); 9y\Ik/
else UOe@R|79q
insertSort(data, l, mid - l + 1); M(} T\R
if ((r - mid) > THRESHOLD) +>tSO!}[
mergeSort(data, temp, mid + 1, r); $?&distJ
else !(_qM
insertSort(data, mid + 1, r - mid); r-hb]!t
UHI<8o9
for (i = l; i <= mid; i++) { /Zz[vf
temp = data; 6m9\0)R
} DI :
for (j = 1; j <= r - mid; j++) { `'rvDaP
temp[r - j + 1] = data[j + mid]; 8P%Jky&(
} EBmkKiI;
int a = temp[l]; ?;rRR48T9E
int b = temp[r]; w~AO;X*Ke"
for (i = l, j = r, k = l; k <= r; k++) { {FNCC*=
if (a < b) { %zjyZ{=
data[k] = temp[i++]; t4zKI~cO
a = temp; PTF|"^k+
} else { [L2N[vy;
data[k] = temp[j--]; !'bZ|j%
b = temp[j]; m*AiP]Qu
} `b)i;m
} bz\nCfU
} H9=8nLb.
Q-e(>=Gv_
/** g s%[Cv
* @param data Mn*v&O:
* @param l :Q;mgHTNz
* @param i hC!8-uBK5<
*/ m4c2WY6k
private void insertSort(int[] data, int start, int len) { vf!lhV-UG+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YQ-V^e6
} S2V+%Z _J
} *Fd(
} S8e?-rC
} YB9)v5Nz(
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堆排序： #!jwn^yq
a/~1CrYr
package org.rut.util.algorithm.support; 2Gc0pBqx
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import org.rut.util.algorithm.SortUtil; na|23jz4
K!tM "`a
/** 5BMrn0
* @author treeroot ;C5 J^xHI
* @since 2006-2-2 ](k}B*Abh
* @version 1.0 /,9n1|FrG
*/ kznm$2 b
public class HeapSort implements SortUtil.Sort{ mN"g~o*
o|1_I?_
/* (non-Javadoc) nsXyReWka
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n?NUnFA
*/ P7qzZ
public void sort(int[] data) { XTq+ 9
MaxHeap h=new MaxHeap(); Yx"~_xA/u
h.init(data); J'yiVneMw
for(int i=0;i h.remove(); 4='/]z
System.arraycopy(h.queue,1,data,0,data.length); <xD6}h/
} j2%M-y4E
(7|!%IO.
private static class MaxHeap{ -aM7>YR
\~:_h#bW
void init(int[] data){ X> V`)
this.queue=new int[data.length+1]; !F)BTB7{<
for(int i=0;i queue[++size]=data; : UDh{GQ*
fixUp(size); _3m\r*(vmQ
} @=6$ImU
} _^NL{R/
`6Yk-5
private int size=0; 6$5SS#
03I*@jj
private int[] queue; pq*4yaTT'
iRI7x)^0"z
public int get() { 0PJ7o#}_{@
return queue[1]; {xQ(xy
} pLpWc~#
a_Z[@W
public void remove() { ~J1UzUxX2
SortUtil.swap(queue,1,size--); K;~I;G
fixDown(1); .10$n*
} aq]bF%7
file://fixdown BA`K,#Ft7
private void fixDown(int k) { <w0$0ku
int j; =\x(Rs3
while ((j = k << 1) <= size) { IUwMIHq&sW
if (j < size %26amp;%26amp; queue[j] j++; aeTVcq
if (queue[k]>queue[j]) file://不用交换 iR{*XE
break; a>)|SfsE
SortUtil.swap(queue,j,k); /~_,p,:aP
k = j; j<-YK4.t
} ?`=r@
} ^r^) &]
private void fixUp(int k) { O`'r:&#W
while (k > 1) { 1y6{3AZm<
int j = k >> 1; 5H/D~hr&
if (queue[j]>queue[k]) 3/RNStd<L!
break; ),U>AiF]
SortUtil.swap(queue,j,k); $w ,^q+
k = j; j%Z%_{6Ds*
} S!.H _=z%p
} <iznB8@
oz?pE[[tm
} W< :7z
4w(#`'I>
} 8Rd*`]@[pk
[UYE.$Y#(
SortUtil： PG'+vl
kTS#>uS
package org.rut.util.algorithm; ~cW,B}
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import org.rut.util.algorithm.support.BubbleSort; E9v_6d[
import org.rut.util.algorithm.support.HeapSort; F@kd[>/[
import org.rut.util.algorithm.support.ImprovedMergeSort; VK]sK e
import org.rut.util.algorithm.support.ImprovedQuickSort; s92SN F}g
import org.rut.util.algorithm.support.InsertSort; 2sahb#e )
import org.rut.util.algorithm.support.MergeSort; .L))EB
import org.rut.util.algorithm.support.QuickSort; 9\a;75a
import org.rut.util.algorithm.support.SelectionSort; "tg?V
import org.rut.util.algorithm.support.ShellSort; pcO0xrI
oC1Nfc+
/** ~Jx0#+z9V
* @author treeroot P^& =L&U
* @since 2006-2-2 (@;=[5+
* @version 1.0 gSXidh}^
*/ :B5M#D!dO
public class SortUtil { rCgoU xW`
public final static int INSERT = 1; \[W)[mH_
public final static int BUBBLE = 2; M%qHf{ B
public final static int SELECTION = 3; n8'#'^|
public final static int SHELL = 4; )XoIb[s"
public final static int QUICK = 5; xPorlX)zW
public final static int IMPROVED_QUICK = 6; f|'8~C5I@>
public final static int MERGE = 7; )CUB7D)=
public final static int IMPROVED_MERGE = 8; .u$o^; z!
public final static int HEAP = 9; F4 :#okt
2H2Yxe7?-
public static void sort(int[] data) { PNhxF C.
sort(data, IMPROVED_QUICK); [vyi_0[
} _/@u[dWeL
private static String[] name={ KBy*QA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zpBkP-%}E
}; 2(K@V6j$M
8)51p+a
private static Sort[] impl=new Sort[]{ l"1at eM3
new InsertSort(), QK@[b3-h1
new BubbleSort(), T6fm`uL&L
new SelectionSort(), @w5x;uB|%G
new ShellSort(), ]U)Yg
new QuickSort(), 9a3mN(<
new ImprovedQuickSort(), }+ZZO0
new MergeSort(), U@<]>.$
new ImprovedMergeSort(), U6yZKK
new HeapSort() ud:5_*
}; VDy\2-b8d
CKr5L
public static String toString(int algorithm){ Eu1t*>ZL
return name[algorithm-1]; <X~P62<
} \O(~:KN
.<kbYo:MV
public static void sort(int[] data, int algorithm) { PQA}_o
impl[algorithm-1].sort(data); 6PdLJ#LS
} xfADks2w
yHjuT+/wM,
public static interface Sort { \S[I:fw#&
public void sort(int[] data); t @vb3
} P&}J(;Lbl
mB<*we
public static void swap(int[] data, int i, int j) { vG'I|OWg
int temp = data; b[os0D95
data = data[j]; w-wap
data[j] = temp; XAw0Nn
} xmNs<mz
} e]q(fPK