[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; 5iydZ
} zi`o#+
int i1=l; d)f :)Ew
int i2=mid+1; oIj#>1~c%
for(int cur=l;cur<=r;cur++){ ]}2ZttQ?
if(i1==mid+1) '}bgLv
data[cur]=temp[i2++]; ;cN{a&
else if(i2>r) >[=^_8M
data[cur]=temp[i1++]; 9j:"J` '
else if(temp[i1] data[cur]=temp[i1++]; E\pL!c
else \&gB)czEO
data[cur]=temp[i2++]; HEc+;O1<
} 3y8G?LL/[7
} 9\JF`ff_
r#]WI|
} $,Yd>%Y
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改进后的归并排序: pgZXJ
Whf.fK
package org.rut.util.algorithm.support; _X"N1,0
AoL2@C.C%D
import org.rut.util.algorithm.SortUtil; :yjKL^G>
WWHoi{q
/** ?R.j^S^
* @author treeroot @A^;jk
* @since 2006-2-2 k-OPU,
* @version 1.0 Lrq.Ab#
*/ m#Z# .j_2
public class ImprovedMergeSort implements SortUtil.Sort { Is?La
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private static final int THRESHOLD = 10; ^V Zk+'4
a\YV3NJ/A
/* PQ$%H>{
* (non-Javadoc) +-CtjhoS
* P:]^rke~&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZlzjVU/E
*/ ptxbDzOz
public void sort(int[] data) { JKGe"
int[] temp=new int[data.length]; Jd^,]
mergeSort(data,temp,0,data.length-1); GKc`xIQ
} Qtv&ijFC
D#JL!A%O
private void mergeSort(int[] data, int[] temp, int l, int r) { >{J(>B\
int i, j, k; :mn>0jK,N
int mid = (l + r) / 2; Cg?&wj<
if (l == r) d;9FB[MmOJ
return; ls:w8&`*
if ((mid - l) >= THRESHOLD) ~d*(=G
mergeSort(data, temp, l, mid); p/@smke
else o:P}Wg/NK
insertSort(data, l, mid - l + 1); p\aaJ
if ((r - mid) > THRESHOLD) o;<Xo&
mergeSort(data, temp, mid + 1, r); mg.kr:
else DG ;_Vg
insertSort(data, mid + 1, r - mid); G`BU=Fi
JB]q
for (i = l; i <= mid; i++) { iaE^a^*
temp = data; H{?vbqQ
} g0Gf6o>2
for (j = 1; j <= r - mid; j++) { ZO$m["|
temp[r - j + 1] = data[j + mid]; 91-o}|3v
} I5n^,@md
int a = temp[l]; $jqq `n_
int b = temp[r]; UH-*(MfB
for (i = l, j = r, k = l; k <= r; k++) { h2J/c#Qvh
if (a < b) { 8~z~_TD6m@
data[k] = temp[i++]; 6){]1h"
a = temp; @? QoF#D
} else { jeH~<t{
data[k] = temp[j--]; .Blf5b
b = temp[j]; L4z ~B!uvF
} ww $
} qPy1;maXP
} kN4{13Qs*
};jN\x?&q
/** (VEpVn3{
* @param data eMY<uqdw
* @param l ah0`KxO]
* @param i xQXXC|T
*/ l@+7:n4K0
private void insertSort(int[] data, int start, int len) { q[W 0 N>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q&=w_Wc
} jun_QiU:2
} _Wq
} cacr=iX
} %'7lbpy,f
WRyaKM
堆排序： ,J^b0@S
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package org.rut.util.algorithm.support; dj7hx"BI
6GSI"M6s
import org.rut.util.algorithm.SortUtil; LzXmb 7A
6NM:DI\%
/** !y:vLB#q
* @author treeroot ^2on.N q>
* @since 2006-2-2 vZ&T}H~8
* @version 1.0 iwp{%FF
*/ CpeU5 o@
public class HeapSort implements SortUtil.Sort{ }v!$dr,j'
Vjp1RWb
/* (non-Javadoc) *4+"Lh.KS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jW3!6*93
*/ Xr$J9*Jk-
public void sort(int[] data) { eWtZ]kB
MaxHeap h=new MaxHeap(); -vR5BMy=
h.init(data); '\ey<}?5V
for(int i=0;i h.remove(); A1D^a,
System.arraycopy(h.queue,1,data,0,data.length); 9m<jcxla$
} PHXZ=A+
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private static class MaxHeap{ 7- ] as$
bg&zo;Ck8T
void init(int[] data){ ;/fF,L{c
this.queue=new int[data.length+1]; X>(TrdK_9"
for(int i=0;i queue[++size]=data; ~yfNxH~k
fixUp(size); n}_JB>i~
} ?Exv|e
} B~JwHwIhA
"UGY2skf;
private int size=0; _w/EP
D!NQ~'.a=2
private int[] queue; mdmvT~`
!tMuuK?IL=
public int get() { /F-qP.<D,r
return queue[1]; 57zSu3v4Y
} [los dnH^?
-o[x2u~n\
public void remove() { =;3Sx::=
SortUtil.swap(queue,1,size--); 7/ysVWt
fixDown(1); y?m/*hh`
} G_{&sa
file://fixdown 6@e+C;j=
private void fixDown(int k) { 8U>B~9:JO
int j; L[H5NUG!
while ((j = k << 1) <= size) { KJ=6n%6
if (j < size %26amp;%26amp; queue[j] j++; ^xHTWg%9
if (queue[k]>queue[j]) file://不用交换 !\i\}feb
break; {7;8#.S72
SortUtil.swap(queue,j,k); UXugRk%d
k = j; V_RTI.3p
} dC$Em@Nb
} d`nVc50
private void fixUp(int k) { XZJ+h,f
while (k > 1) { <2|O:G
int j = k >> 1; Q6AC(n@:FV
if (queue[j]>queue[k]) 8XzR wYV
break; e8]\U/
SortUtil.swap(queue,j,k); 8V)^R(\;
k = j; r>"
} *x])Y~oQ
} ?^$MRa:D
&nkW1Ner9
} OCJnjlV%
ll6wpV0m
} B}:(za&
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SortUtil： HATA-M
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package org.rut.util.algorithm; fX.>9H[w@~
4%}*&nsI-Z
import org.rut.util.algorithm.support.BubbleSort; HA`@7I
import org.rut.util.algorithm.support.HeapSort; `V"sOTb
import org.rut.util.algorithm.support.ImprovedMergeSort; SWQ5fcPu
import org.rut.util.algorithm.support.ImprovedQuickSort; tqeZ#w7
import org.rut.util.algorithm.support.InsertSort; kc @[9eV
import org.rut.util.algorithm.support.MergeSort; zG9Y!SY\-
import org.rut.util.algorithm.support.QuickSort; !n$tr
import org.rut.util.algorithm.support.SelectionSort; AvSM^
import org.rut.util.algorithm.support.ShellSort; .J.-Mm`.
I1\a[Xe8E
/** T ;vF(
* @author treeroot GXjfQ~<]
* @since 2006-2-2 C;`XlQG `
* @version 1.0 {R61cD,n
*/ dBe`p5Z
public class SortUtil { gO,25::")
public final static int INSERT = 1; xY U.D+RY
public final static int BUBBLE = 2; 2fS[J'-o
public final static int SELECTION = 3; {]_r W/
public final static int SHELL = 4; N:tY":Hi
public final static int QUICK = 5; X 9%'|(tL
public final static int IMPROVED_QUICK = 6; ;D s46M-s
public final static int MERGE = 7; x{,q]u /
public final static int IMPROVED_MERGE = 8; m-DsY
public final static int HEAP = 9; P=&o%K,:f
<Ib[82PU
public static void sort(int[] data) { ?(m jx
sort(data, IMPROVED_QUICK); vR=6pl$|~~
} J9Ou+6u(
private static String[] name={ 9,_mS{+B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P*@2.#oO
}; ~L_hZso4
;3@YZM'wt
private static Sort[] impl=new Sort[]{ CQr<N w
new InsertSort(), $w0lrh[+
new BubbleSort(), @qjfZH@
new SelectionSort(), ;9ly'<up
new ShellSort(), P=+nB*hG
new QuickSort(), )aao[_ZS
new ImprovedQuickSort(), VX+jadYdq
new MergeSort(), MJCzo |w
new ImprovedMergeSort(), hL;8pE8
new HeapSort() !F4@KAv
}; )a3J9a;ZS0
,H2D
public static String toString(int algorithm){ f{i8w!O"~
return name[algorithm-1]; UH>F|3"d
} a/U2xq{x
PN<C=gAe
public static void sort(int[] data, int algorithm) { bb`':3%
impl[algorithm-1].sort(data); P<2+L|X?}
} 80Y\|)
6uKMCQ=h
public static interface Sort { -0eq_+oQ
public void sort(int[] data); uy^
} `^Eae
N2$I}q%
public static void swap(int[] data, int i, int j) { c$`4*6
int temp = data; 7,MS '2nz
data = data[j]; 0lsXCr_X
data[j] = temp; KdUnD4d
} -:9P%jWt
} ww{_c]My