[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; 1$03:ve1
} KyX2CfW}t
int i1=l; C('D]u$Hdk
int i2=mid+1; &%j`WF4p
for(int cur=l;cur<=r;cur++){ _0rt.NRD
if(i1==mid+1) Ur< (TM
data[cur]=temp[i2++]; Sy <E@1
else if(i2>r) 4z5qXI/<m4
data[cur]=temp[i1++]; rhPv{6Z|7
else if(temp[i1] data[cur]=temp[i1++]; & n@hD7=(
else .jqil0#)Y"
data[cur]=temp[i2++]; jc_k\
} /r'Fq =z
} >$rH,Er
c!6v-2ykv
} ]lfufjj
Hif|z[0$
改进后的归并排序: (Ud"+a
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package org.rut.util.algorithm.support; w,j!%N
N7"cMAs\G
import org.rut.util.algorithm.SortUtil; 2Xv}JPS2As
>x6\A7
/** GOdWc9Ta!
* @author treeroot <`SA>P
* @since 2006-2-2 83V\O_7j
* @version 1.0 #pAN
*/ 81|[Y'f
public class ImprovedMergeSort implements SortUtil.Sort { kK}?NKqT
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private static final int THRESHOLD = 10; I/St=-;
x'}zNEXI
/* &?QKWxN
* (non-Javadoc) :^?-bppYW
* tE-bHu370
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]#shuZ##>0
*/ ,ov$`v
public void sort(int[] data) { OjffN'a+N
int[] temp=new int[data.length]; -:_3N2U=+
mergeSort(data,temp,0,data.length-1); /PaS<"<P@
} aU.3
q/*veL
private void mergeSort(int[] data, int[] temp, int l, int r) { g/$RuT2U
int i, j, k; GL0P&$h
int mid = (l + r) / 2; aj1g9y
if (l == r) <e 9d5-2
return; )!AH0p
if ((mid - l) >= THRESHOLD) 6W YVHG
mergeSort(data, temp, l, mid); fGeie m
else w]xr ~D+
insertSort(data, l, mid - l + 1); #lMIs4i.
if ((r - mid) > THRESHOLD) 8v/,<eARJ
mergeSort(data, temp, mid + 1, r); MX#LtCG#V
else ZZkc) @
insertSort(data, mid + 1, r - mid); DS4y@,/)'
a6h+?Q7uF
for (i = l; i <= mid; i++) { X*7VDt=
temp = data; p<D@l2vt
} e:MbMj6`
for (j = 1; j <= r - mid; j++) { _Ad63.Uq))
temp[r - j + 1] = data[j + mid]; N6BOUU]
} M7Xn=jc
int a = temp[l]; (0y!{ (a
int b = temp[r]; UT{`'#iT
for (i = l, j = r, k = l; k <= r; k++) { \goiW;b
if (a < b) { g*_n|7pB
data[k] = temp[i++]; j)ln"u0R^B
a = temp; )j}#6r
} else { )JyB
data[k] = temp[j--]; LrdED[Z
b = temp[j]; @6!Myez'
} ryzNM3
} iSOyp\E|
} Xep2)3k>
_'y`hKeI[
/** ^"iL|3d
* @param data D^s#pOZS
* @param l OM7AK B=S
* @param i fV6ddh
*/ 'F/uD1;
private void insertSort(int[] data, int start, int len) { c%wztP;L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hhU\$'0B-
} 5}5oj37x
} 64"DT3:
} 23houS
} ei}(jlQp
qJtLJ<=1
堆排序： ZcHIk{|
B=r+ m;(
package org.rut.util.algorithm.support; F_/ra?WVH
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import org.rut.util.algorithm.SortUtil; i3L2N~:V
+4qR5(W
/** >lJTS t5{
* @author treeroot eqOT@~H
* @since 2006-2-2 TB<$9FCHK
* @version 1.0 n8\88d
*/ K2v[_a~@
public class HeapSort implements SortUtil.Sort{ ?-0, x|ul
y>T>
/* (non-Javadoc) f"AT@Ga]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uhn3usK
*/ z'O+B}
public void sort(int[] data) { k1P'Q&Na
MaxHeap h=new MaxHeap(); qMA";Frt3N
h.init(data); NCo!n$O1~
for(int i=0;i h.remove(); fb[lL7
System.arraycopy(h.queue,1,data,0,data.length); Zrgv*
} +.rOqkxJ
k3Puq1H
private static class MaxHeap{ @li/Y6Wh
R7h3O0@!
void init(int[] data){ /74h+.amg
this.queue=new int[data.length+1]; QTN24 q4
for(int i=0;i queue[++size]=data; #_IuB) qy
fixUp(size); {+Wknm%
} oxI?7dy5
} 7GErh,
Q$k#q<+0
private int size=0; B o%Sl
SY@;u<Pd
private int[] queue; jlqSw4_
MIiBNNURX
public int get() { 'X4)2iFV
return queue[1]; U(OkTJxv+
} tt6GtYrC 1
+nB0O/m'U
public void remove() { RHbbj}B
SortUtil.swap(queue,1,size--); ;v.J D7
fixDown(1); r%$\Na''
} #3RElI
file://fixdown (WY9EJ<s,
private void fixDown(int k) { v:w^$]4
int j; NMC0y|G
while ((j = k << 1) <= size) { qM2m!
if (j < size %26amp;%26amp; queue[j] j++; 5'`DrTOA
if (queue[k]>queue[j]) file://不用交换 Nm-E4N#'i
break; 0;OZ|;Z
SortUtil.swap(queue,j,k); ~Dw% d;
k = j; {F\P3-ub
} tehWGqx)
} XJwgh y?(
private void fixUp(int k) { 4L97UhLL
while (k > 1) { @`^Z5n.4
int j = k >> 1; -QBM^L
if (queue[j]>queue[k]) F|oyrG
break; [ `_sH\
SortUtil.swap(queue,j,k); w?M"`O(
k = j; *Utx0Me
} 2FO<Z %Y
} (wxi!
`fG<iBD
} mjk<FXW
![]6| G&
} #e@[{s7
g 4$
SortUtil： VyNU<}
I1K%n'D
package org.rut.util.algorithm; g]BA/Dw
nT}i&t!q8@
import org.rut.util.algorithm.support.BubbleSort; Q{miI N
import org.rut.util.algorithm.support.HeapSort; PTXS8e4
import org.rut.util.algorithm.support.ImprovedMergeSort; /_8nZVu
import org.rut.util.algorithm.support.ImprovedQuickSort; Z}SqiT
import org.rut.util.algorithm.support.InsertSort; o,0 Z^"|
import org.rut.util.algorithm.support.MergeSort; _oefp*iWS
import org.rut.util.algorithm.support.QuickSort; 7,uD7R_
import org.rut.util.algorithm.support.SelectionSort; [;:ocy
import org.rut.util.algorithm.support.ShellSort; YzEOfHL,
1C*mR%Q
/** YZ<5-C
* @author treeroot k!WeE#"(
* @since 2006-2-2 V;Ln|._/t
* @version 1.0 [`bK {Dq2
*/ E2`9H-6e
public class SortUtil { {aK3'-7
public final static int INSERT = 1; )}_}D+2
public final static int BUBBLE = 2; l>(*bb1}b
public final static int SELECTION = 3; zQu9LN
public final static int SHELL = 4; #%#N.tB5
public final static int QUICK = 5; I\[z(CHg@
public final static int IMPROVED_QUICK = 6; ?UeV5<TewS
public final static int MERGE = 7; N{M25ucAHl
public final static int IMPROVED_MERGE = 8; dAOJ: @y
public final static int HEAP = 9; Kf,AnKkn'
Lso%1M
public static void sort(int[] data) { mW,b#'hy
sort(data, IMPROVED_QUICK); Aq>?G+
} /h]ru SI
private static String[] name={ iorQ/(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6 lEv<)cC
}; vuJEPn%
6J$I8b#/
private static Sort[] impl=new Sort[]{ ]Qp-$)N
new InsertSort(), P/q] u
new BubbleSort(), g$/7km{TP
new SelectionSort(), pRjrMS
new ShellSort(), wqzpFPk(
new QuickSort(), hx:^xW@r4P
new ImprovedQuickSort(), QWC C
new MergeSort(), A.$P1zwC
new ImprovedMergeSort(), Cj YI*
new HeapSort() ? 5OK4cR
}; yGX5\PSo
Qz$nWsD
public static String toString(int algorithm){ S5UQ
return name[algorithm-1]; GE!p
} W}%[i+
6%wlz%Fp
public static void sort(int[] data, int algorithm) { "t-9q
impl[algorithm-1].sort(data); t"MrrK>T
} P1Iy>%3
'Ddzlip
public static interface Sort { hyhm{RC?[
public void sort(int[] data); ~Ra8(KocD
} %8YUK/(|n
'0I>
public static void swap(int[] data, int i, int j) { um( xZ6&m
int temp = data; <;1M!.)5
data = data[j]; 6/"#pe^
data[j] = temp; `/B+
} z+zEH9.'
} J*Cf1 D5!