[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/)q^m1L
} L/I-(08!Y:
int i1=l; 0bE_iu>f'
int i2=mid+1; _f`m/l
for(int cur=l;cur<=r;cur++){ nq=fSK(
if(i1==mid+1) >. Y~F(
data[cur]=temp[i2++]; )[1m$>
else if(i2>r) /L.a:Er$
data[cur]=temp[i1++]; F@BNSs N=
else if(temp[i1] data[cur]=temp[i1++]; -)@.D>HsOt
else 6D],275`J
data[cur]=temp[i2++]; $m>e!P>%u
} UL/>t}AG
} P7b2I=t
,o)MiR9-[A
} ? &O$ayG77
sAN#j {
改进后的归并排序: [H1NP'Kg]
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package org.rut.util.algorithm.support; <_![~n$H
N5\<w>
import org.rut.util.algorithm.SortUtil; ;Yj}9[p;T
TI332,eL
/** _MU'he^W
* @author treeroot P*SXfb"HC
* @since 2006-2-2 AZa3!e/1
* @version 1.0 kBzzi^cl
*/ gT.-Cf{
public class ImprovedMergeSort implements SortUtil.Sort { o;.-I[9h]
-AX3Rnv^!
private static final int THRESHOLD = 10; nTAsy0p]
KJd;c.
/* ZLkJYZk
* (non-Javadoc) j{g{`Qa
* fh~&&f}6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nd6z81
*/ v>XE]c_
public void sort(int[] data) { dZW:Cf 9K
int[] temp=new int[data.length]; n>HNpy
mergeSort(data,temp,0,data.length-1); Vr*t~M>
} 1}6pq2
g@Zc'g/XB
private void mergeSort(int[] data, int[] temp, int l, int r) { (GQy"IuFh
int i, j, k; ?vVkZsU
int mid = (l + r) / 2; ,"'agg:St
if (l == r) 6]Jv3Re'(I
return; "#7i-?=
if ((mid - l) >= THRESHOLD) ;Y"J j
mergeSort(data, temp, l, mid); Ol? 2Qy.2)
else .#n?^73
insertSort(data, l, mid - l + 1); ?]t8$^m,;
if ((r - mid) > THRESHOLD) V/Q6v YX
mergeSort(data, temp, mid + 1, r); `G'V9Xs(
else P}5aN_v\
insertSort(data, mid + 1, r - mid); *%O1d.,
_5zR!|\^
for (i = l; i <= mid; i++) { -K jCPc
temp = data; 9hv\%_>o
} g@QpqrT
for (j = 1; j <= r - mid; j++) { c|7Pnx%gT
temp[r - j + 1] = data[j + mid]; R8 m/Nt2
} 7-5q\[ZK
int a = temp[l]; qb_V ,b9
int b = temp[r]; d>%_<pw
for (i = l, j = r, k = l; k <= r; k++) { vl#/8]0!
if (a < b) { )L{\k$r!EM
data[k] = temp[i++]; C?O{l%0
a = temp; E8xXr>j>#
} else { U0rz 4fxc
data[k] = temp[j--]; eYagI
b = temp[j]; ;cO0Y.V9l
} >eC^]#c
} bfJDF(=h
} ZD,l2DQ?
8[DD=[&
/** 4MM#\
* @param data Dihk8qJ/6
* @param l j<!$ug9VA
* @param i 982$d<0%
*/ gQ?k}D
private void insertSort(int[] data, int start, int len) { +o/q@&v;Ax
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $d"6y
} 6+It>mnR
} ~DJ/sY2/
} 5`+*({
} 9J?j2!D
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堆排序： L^=>)\R2$[
u7/M>YJ`T
package org.rut.util.algorithm.support; '.iUv#j4Sh
EgY]U1{
import org.rut.util.algorithm.SortUtil; J^v_VZ3
v uJ~Lg{
/** }$7Hf+G
* @author treeroot {*|yU"
* @since 2006-2-2 mz#(\p=T
* @version 1.0 p?}Rolk7
*/ j#*K[
public class HeapSort implements SortUtil.Sort{ +?c&Gazi
zYep V
/* (non-Javadoc) os2yiF",
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u%|VmM>
*/ X)yTx8v4
public void sort(int[] data) { lu>>~vy6
MaxHeap h=new MaxHeap(); 9Kqr9U--v
h.init(data); T1x$v,)8x
for(int i=0;i h.remove(); #&@&BlIe
System.arraycopy(h.queue,1,data,0,data.length); 5'o.v^l
} OxD\e5r
!PO(Bfd
private static class MaxHeap{ S"Efp/-
04(h!@!g:
void init(int[] data){ # mzJ^V-
this.queue=new int[data.length+1]; `Q{kiy
for(int i=0;i queue[++size]=data; 7mu%|!
fixUp(size); p*^O8o
} N+r~\[N\9
} 9oaq%Sf
H fRxgA@
private int size=0; Tv(s?T6f
W6a2I
private int[] queue; >Mn"k\j4
b~\![HoCMM
public int get() { _rajm J
return queue[1]; r}vrE ^Q
} Pd3t~1TaW
N8KHNTb-M
public void remove() { wo*/{KFvh
SortUtil.swap(queue,1,size--); @50Js3R1q
fixDown(1); i3kI{8h
} ztTpMj
file://fixdown o&>0 pc
private void fixDown(int k) { KR{kn[2|Q
int j; !Zs;m`j&9
while ((j = k << 1) <= size) { ?56Zw"89
if (j < size %26amp;%26amp; queue[j] j++; \O^= Z{3y
if (queue[k]>queue[j]) file://不用交换 bT8BJY%+
break; o77HRX
SortUtil.swap(queue,j,k); '- Z4GcL
k = j; |5O%@
} +oyc9PoXF
} &AoWT:Ea
private void fixUp(int k) { TzIgEn~
while (k > 1) { $mpfr#!&3o
int j = k >> 1; mX<D]Z< k
if (queue[j]>queue[k]) h IGa);g
break; ]qXfgc
SortUtil.swap(queue,j,k); @]cpPW-b
k = j; wngxVhu8Ld
} !1!uB }
} BkIvoW_
"Uyw7
} p<jHUG4?'
:}E*u^v K
} QJ$]~)w?H
MY0Wr%@#0
SortUtil： KYlWV<sR
OnG!5b
package org.rut.util.algorithm; ag] nVE/
R z[-
import org.rut.util.algorithm.support.BubbleSort; ~M <4HC
import org.rut.util.algorithm.support.HeapSort; 7C&`i}/t
import org.rut.util.algorithm.support.ImprovedMergeSort; #!<x|N?_<
import org.rut.util.algorithm.support.ImprovedQuickSort; u'=#~'6
import org.rut.util.algorithm.support.InsertSort; SK-|O9Ki
import org.rut.util.algorithm.support.MergeSort; q6osRK*20
import org.rut.util.algorithm.support.QuickSort; t[#`%$%'
import org.rut.util.algorithm.support.SelectionSort; PZ"xW0"-
import org.rut.util.algorithm.support.ShellSort; %.Mtn%:I*
0ai4%=d-
/** &jj\-;=~Ho
* @author treeroot S;CT:kG6Y{
* @since 2006-2-2 ,,@_r&f:
* @version 1.0 +|o-lb
*/ of(Nq@
public class SortUtil { [TNYPA>{
public final static int INSERT = 1; [t ^|l?
public final static int BUBBLE = 2; `5>IvrzXrK
public final static int SELECTION = 3; JhuKW>7
public final static int SHELL = 4; &qo'ge8p
public final static int QUICK = 5; <@Ew-JU
public final static int IMPROVED_QUICK = 6; ?lbX.+
public final static int MERGE = 7; Gk!v-h9cq
public final static int IMPROVED_MERGE = 8; ;7qk9rz4
public final static int HEAP = 9; k5<lkC2z
8o~\L= l
public static void sort(int[] data) { _msDf2e9
sort(data, IMPROVED_QUICK); !4 6^}3
} :CH'Bt4<
private static String[] name={ {Q4=GrS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \Z)'':},C
}; u |#ruFR
vnIxI a
private static Sort[] impl=new Sort[]{ J :,
new InsertSort(), V @8X.R>
new BubbleSort(), z.{yVQE
new SelectionSort(), @ cv`}k
new ShellSort(), RPLr7Lb
new QuickSort(), 7\jH?Zi
new ImprovedQuickSort(), J\2F%kBej?
new MergeSort(), TzPVO>s
new ImprovedMergeSort(), N\H(AzMw
new HeapSort() K<N0%c~
}; |QHWX^pO
Q,jlKgB5:
public static String toString(int algorithm){ w$2-t
return name[algorithm-1]; \2~.r/`1
} 's*UU:R
4u:{PN
public static void sort(int[] data, int algorithm) { SqEO ]~
impl[algorithm-1].sort(data); c-gaK\u}j}
} ^B5Hjf9
QAX+oy
public static interface Sort { 1)k))w9
public void sort(int[] data); G|H\(3hHLZ
} Y/{Z`}
6#dx%TC
public static void swap(int[] data, int i, int j) { .}j@(D
int temp = data; \QHM7C T
data = data[j]; jQf1h|e
data[j] = temp; J|3CG;+
} bEPXNN
} s'/ug