[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; k/cQJz
} =ejkE; %L
int i1=l; 1Qv5m^>vj
int i2=mid+1; &Zd!|u
for(int cur=l;cur<=r;cur++){ h8Kri}z;M
if(i1==mid+1) gTm[<Y
data[cur]=temp[i2++]; a3JG&6-
else if(i2>r) !\2Xr{f
data[cur]=temp[i1++]; tyNT1F{
else if(temp[i1] data[cur]=temp[i1++]; 7@5}WNr
else 9>%ti&_-jt
data[cur]=temp[i2++]; GVe[)R
} BG/M3
} j$siCsF
eA4@)6WP(
} f8!*4Bw
le`fRq8f&
改进后的归并排序: t*~V]wZ
89@gYA"Su
package org.rut.util.algorithm.support; YqrieDFay!
Az{Z=:(0
import org.rut.util.algorithm.SortUtil; g&) XaF[!
G)G5eXXX
/** ?x=;?7
* @author treeroot C8%q?.nH=
* @since 2006-2-2 Ak^g#^c*
* @version 1.0 GeD^-.^
*/ |-%[Z
public class ImprovedMergeSort implements SortUtil.Sort { C65( m
*6?h,Dt L
private static final int THRESHOLD = 10; ZXh6Se4o
FY@ErA7~
/* ~sx?aiO
* (non-Javadoc) Z`Rrv$M!
* ?zM]p"M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R#DnV[!\
*/ tU.Y$%4
public void sort(int[] data) { 7='lu;=,
int[] temp=new int[data.length]; V'K1kYb
mergeSort(data,temp,0,data.length-1); :=C-P7
} N^jQ\|A<
Z.ky=vCt
private void mergeSort(int[] data, int[] temp, int l, int r) { TFjb1a,)
int i, j, k; IC"bg<L,*
int mid = (l + r) / 2; l03{ ezJk[
if (l == r) HN]roSt~
return; 8GgZAu'X
if ((mid - l) >= THRESHOLD) EIPNR:6t
mergeSort(data, temp, l, mid); [W;iR_7T5
else >|'u:`A
insertSort(data, l, mid - l + 1); W_8N?coM
if ((r - mid) > THRESHOLD) w3WBgH
mergeSort(data, temp, mid + 1, r); DD{-xCCR
else #?DwOUw
insertSort(data, mid + 1, r - mid); bz<f u
t2uX+1F
for (i = l; i <= mid; i++) { ).0klwfV
temp = data; L3/m}AH,
} V{+'(<SV
for (j = 1; j <= r - mid; j++) { pyJY]"UHVE
temp[r - j + 1] = data[j + mid]; 7&;M"?m&
} Wa7-N4
int a = temp[l]; nLicog)!I
int b = temp[r]; F!(Vg
for (i = l, j = r, k = l; k <= r; k++) { H0r@dn
if (a < b) { I7,5ID4pn
data[k] = temp[i++]; R~ n[g
a = temp; P'MfuTtT&
} else { ]-]K4*{
data[k] = temp[j--]; f9ux+XQk9
b = temp[j]; lLhvpvT
} ;+jz=9Q-
} jkTC/9AE|
} v"ZNS
nI]8w6eCV
/** 0vR gmn
* @param data }@6ws/5
* @param l Uq/FH@E=
* @param i AtU%S9
*/ [QwEidX|
private void insertSort(int[] data, int start, int len) { )B'&XLK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i7D[5!
} wr>[Eo@%\
} ?i'N9 /(
} F#NuZ'U
} 4:wVT;?a
v_^>*Vm*
堆排序： ^m pWQ`R
&GYnGrw?@
package org.rut.util.algorithm.support; uIh68UM
b$FK}D5
import org.rut.util.algorithm.SortUtil; 7W[+e&
)<YfLDgTs
/** Hw29V //
* @author treeroot v *icoj
* @since 2006-2-2 pY.R?\
* @version 1.0 Kcl~cIh77
*/ BV;dV6`z
public class HeapSort implements SortUtil.Sort{ 4Ys\<\~d
(-S\%,hO
/* (non-Javadoc) ak1?MKV.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |Yb]@9>vn
*/ p.@kv
public void sort(int[] data) { 6sjd:~J:
MaxHeap h=new MaxHeap(); R` g'WaDk
h.init(data); '_ZiZ4O
for(int i=0;i h.remove(); (>]frlEU~
System.arraycopy(h.queue,1,data,0,data.length); "t0l)P*C}
} Wdk]>w 'L
UA4="/
private static class MaxHeap{ V_\9t8
POXd,ON9
void init(int[] data){ pSa pF)1>
this.queue=new int[data.length+1]; A4{14Y;?
for(int i=0;i queue[++size]=data; ) KvGJo)("
fixUp(size); ==#mlpi`S[
} u~c75Mk_v
} P*6h$T
B<$(Nb5<
private int size=0; ,{6Vf|?
i1dE.f;
private int[] queue; 8yCt(ms
&c[ISc>N{
public int get() { Uv)B
return queue[1]; PPAcEXsIu
} mP*Ct6628n
w`YN#G
public void remove() { RE0ud_q2
SortUtil.swap(queue,1,size--); ^t}1$H
fixDown(1); Lm&BT)*
} :_8Nf1B+T
file://fixdown ~`97?6*Ra
private void fixDown(int k) { -kk0zg &|i
int j; u_HCXpP!Q
while ((j = k << 1) <= size) { {k}$L|w
if (j < size %26amp;%26amp; queue[j] j++; k'8tqIUN]
if (queue[k]>queue[j]) file://不用交换 F5y0(=$T
break; 'vwu^u?
SortUtil.swap(queue,j,k); Y6 <.]H
k = j; j DkBe-`
} 6%^A6U
} kk>z,A4 h_
private void fixUp(int k) { *$]50 \W
while (k > 1) { 2WK c;?
int j = k >> 1; +R8G*2
if (queue[j]>queue[k]) {nPiIPH
break; v\lKY*@f
SortUtil.swap(queue,j,k); I:6H65(&
k = j; `O0bba=:=
} SPT?Tt
} ??#SQSU
V_3K((P6
} _I?oR.ON33
!tzk7D
} M]Hf>7p
T@jv0/(+
SortUtil： 6bDizS}
~_SRcM{
package org.rut.util.algorithm; i@`qam
%(1Jt"9|
import org.rut.util.algorithm.support.BubbleSort; f"z;'
import org.rut.util.algorithm.support.HeapSort; T' =6_?7K4
import org.rut.util.algorithm.support.ImprovedMergeSort; kBU`Q{.
import org.rut.util.algorithm.support.ImprovedQuickSort; RkZyqt @+
import org.rut.util.algorithm.support.InsertSort; Q h{P>}
import org.rut.util.algorithm.support.MergeSort; '=0l{hv@
import org.rut.util.algorithm.support.QuickSort; wQ^RXbJI9
import org.rut.util.algorithm.support.SelectionSort; B[IWgvB(e
import org.rut.util.algorithm.support.ShellSort; JU#m?4g
'gtcy
/** bkuJN%
* @author treeroot !k Heslvi
* @since 2006-2-2 */HW]x|?V~
* @version 1.0 Q@1SqK#-DQ
*/ >,ABE2t5
public class SortUtil { [<|$If99\
public final static int INSERT = 1; q/^?rd
public final static int BUBBLE = 2; Zts1BWL[
public final static int SELECTION = 3; 1N[9\Yi
public final static int SHELL = 4; 6e S~*
public final static int QUICK = 5; *xjP^y":
public final static int IMPROVED_QUICK = 6; `mH]QjAO
public final static int MERGE = 7; ejia4(Cd
public final static int IMPROVED_MERGE = 8; yl&s!I
public final static int HEAP = 9; nYR#Q|
erKi*GssZ
public static void sort(int[] data) { Vr@tSc&
sort(data, IMPROVED_QUICK); 0NK|3]p
} *07?U")
private static String[] name={ nu)YN1 *
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" FJ{/EloF
}; - ~4na{6x
Gr>CdB>~+
private static Sort[] impl=new Sort[]{ xYZ,.
new InsertSort(), (xE |T f
new BubbleSort(), \H9:%Tlp~4
new SelectionSort(), a`8]TD
new ShellSort(), N/'8W9#6
new QuickSort(), XS #u/!
new ImprovedQuickSort(), l,~`o$_
new MergeSort(), =~"X/>'
new ImprovedMergeSort(), G[*z,2Kb>
new HeapSort() QJ(5o7Tfn
}; %NfXe[T
]28j$)6
public static String toString(int algorithm){ 6#AEVRJKU@
return name[algorithm-1]; E[7E%^:Mg
} Dw.I<fns^B
( et W4p
public static void sort(int[] data, int algorithm) { ak-agH
impl[algorithm-1].sort(data); RO|8NC<oj
} lT*@f39~g
m"-kkH{I
public static interface Sort { \#xq$ygg
public void sort(int[] data); jO/cdLKX(
} x.4z)2MO
}#-@5["-X
public static void swap(int[] data, int i, int j) { Hq+QsplG
int temp = data; t|V<K^
data = data[j]; W9pY=9]p+
data[j] = temp; 7{(UiQbf
} #0vda'q=j
} -`DYDIr