[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; ^V_vpr]}P
} z2wR]G5!
int i1=l; Q^ bG1p//.
int i2=mid+1; h&;\
for(int cur=l;cur<=r;cur++){ fb&K.6"
if(i1==mid+1) ~|R"GloUw
data[cur]=temp[i2++]; OKxPf]~4E
else if(i2>r) ?Ju=L|
data[cur]=temp[i1++]; C Vyq/X
else if(temp[i1] data[cur]=temp[i1++]; dD@T}^j *|
else sW@4r/F>:D
data[cur]=temp[i2++]; UOT~L4G
} +twJHf_U
} e8--qV#<
ib;:*
} c]t=#
+q1 @8
改进后的归并排序: =y[eQS$
/XtxgO\T.
package org.rut.util.algorithm.support; xAon:58m{
*`=V"nXw$|
import org.rut.util.algorithm.SortUtil; lf[(
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/** ^h4Q2Mv o
* @author treeroot *.ZV.(
* @since 2006-2-2 8.'%wOU@A
* @version 1.0 /'!F \ kz
*/ +w%MwPC7`
public class ImprovedMergeSort implements SortUtil.Sort { ){L`hQ*=w
v|CRiwx
private static final int THRESHOLD = 10; J:M^oA'N:>
P_lk40X
/* f:=q=i
* (non-Javadoc) {*yhiE,
* *"q~z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q J@XVN4
*/ 0_,V}
public void sort(int[] data) { _N.ZpKVu
int[] temp=new int[data.length]; hXmW,+1
mergeSort(data,temp,0,data.length-1); I>C;$Lp]
} L+9a4/q
*-ZJF6
private void mergeSort(int[] data, int[] temp, int l, int r) { !H~G_?Mf\O
int i, j, k; 0waQw7 E
int mid = (l + r) / 2; [1G4he%
if (l == r) Mp7r`A,6
return; Y[ a$~n^:n
if ((mid - l) >= THRESHOLD) Vdh5s292h
mergeSort(data, temp, l, mid); W29@`93
else ;_1D-Mf
insertSort(data, l, mid - l + 1); :&9#p%/
if ((r - mid) > THRESHOLD) N=)N
mergeSort(data, temp, mid + 1, r); y*2:(nI
else KR?-<
insertSort(data, mid + 1, r - mid); (VU: &.
;~tKNytD`B
for (i = l; i <= mid; i++) { dHg[0Br)r
temp = data; f*p=]]y
} Y{f;qbEQH'
for (j = 1; j <= r - mid; j++) { u2@:[:Ao
temp[r - j + 1] = data[j + mid]; +p>tO\mo
} @0-<|,^]
int a = temp[l]; J XbG|L
int b = temp[r]; )zz"DH
for (i = l, j = r, k = l; k <= r; k++) { Jd7+~isu~
if (a < b) { ,M5zhp$
data[k] = temp[i++]; #92MI#|n9
a = temp; <vhlT#p
} else { m7cp0+Peo
data[k] = temp[j--]; [Xg?sdQCI
b = temp[j]; u\Tq5PYXt
} "b|qyT* Sl
} = 0Z}s
} ./rNq!*a
:>\i
/** m';:):
* @param data @'7'3+ c
* @param l ,4)zn6tC
* @param i C8e{9CF
*/ qI5_@[S*
private void insertSort(int[] data, int start, int len) { 3tA6r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8%U+y0j6b
} 0\k2F,:%4
} "!+q0l1]@
} p*8=($j4
} ?2E@)7
-'*B%yy
堆排序： N0vr>e`
K*d+pImrV
package org.rut.util.algorithm.support; Vyf r>pgW1
G ZDyw9
import org.rut.util.algorithm.SortUtil; 8I$>e (
*/u_RJ
/** F$^RM3
* @author treeroot `!K(P- yB?
* @since 2006-2-2 +A>>Ak|s
* @version 1.0 <V5(5gx
*/ ^"(CZvq
public class HeapSort implements SortUtil.Sort{ O>IY<]x>L
:uSo2d
/* (non-Javadoc) H"=%|/1M0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @aAB#,
*/ @4#q
public void sort(int[] data) { '-N `u$3Y
MaxHeap h=new MaxHeap(); HQCxO?
h.init(data); *:{s|18Pj
for(int i=0;i h.remove(); mCb(B48]%X
System.arraycopy(h.queue,1,data,0,data.length); F>dB@V-
} sf<S#;aYqn
YC8wo1;Y!
private static class MaxHeap{ K`{P/w
? %XTD39
void init(int[] data){ C& BRyo
this.queue=new int[data.length+1]; A<fKO <d
for(int i=0;i queue[++size]=data; WYSqnmi
fixUp(size); WXV(R,*Tc
} WK)hj{k
} PV$)k>H-
't.IYBHx
private int size=0; n?!XNXb
S81%iz.n
private int[] queue; BZ*',\o
2FU+o\1%
public int get() { 1LYz X;H1
return queue[1]; t(AW2{%}
} VHyH't_&s
X'Q?Mh
public void remove() { ]Wr2IM
SortUtil.swap(queue,1,size--); %A64AJZ
fixDown(1); T$rhz)_q
} v3PtiKS
file://fixdown `@TWZ%f6
private void fixDown(int k) { d9e_slx
int j; Kh&W\\K
while ((j = k << 1) <= size) { 'K&^y%~py,
if (j < size %26amp;%26amp; queue[j] j++; VRU"2mQ.P6
if (queue[k]>queue[j]) file://不用交换 d!0iv'^t
break; ,.DTJ7H+
SortUtil.swap(queue,j,k); E:vgG|??
k = j; H1>~,zc>E
} {*mf Is
} 7+ +Fak
private void fixUp(int k) { -Pt.
while (k > 1) { \]<eLw-v
int j = k >> 1; G\&9.@`k
if (queue[j]>queue[k]) mv] .
break; -UY5T@as
SortUtil.swap(queue,j,k); : N9,/-s
k = j; E+z),"QA
} + OKk~GYf
} k;/K']4y
TWE>"8]
} 2iM]t&^<+
K|L&mL&8
} b3.
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SortUtil： E$SYXe[,
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package org.rut.util.algorithm; Ig&H0S
WbJ|]}hJ\
import org.rut.util.algorithm.support.BubbleSort; pPL)!=o!
import org.rut.util.algorithm.support.HeapSort; HQ /D)D
import org.rut.util.algorithm.support.ImprovedMergeSort; CWT#1L=
import org.rut.util.algorithm.support.ImprovedQuickSort; ]2E#P.-!b
import org.rut.util.algorithm.support.InsertSort; +MZsL7%
import org.rut.util.algorithm.support.MergeSort; dCA| )
import org.rut.util.algorithm.support.QuickSort; 9K!kU6Gh
import org.rut.util.algorithm.support.SelectionSort; .`p,pt;
import org.rut.util.algorithm.support.ShellSort; gGZ-B<
5 EhOvt8
/** 3JYhF)G
* @author treeroot :1asY:)vNP
* @since 2006-2-2 B(|*u
* @version 1.0 @TJxU
*/ tTEw"DL_-
public class SortUtil { 5 w-Pq&q
public final static int INSERT = 1; $8>kk
public final static int BUBBLE = 2; f \ E9u}
public final static int SELECTION = 3; +Vv+<M
public final static int SHELL = 4; lbs0i
public final static int QUICK = 5; Xwp6]lx
public final static int IMPROVED_QUICK = 6; m^!Kthq
public final static int MERGE = 7; 0<i8 ;2KD
public final static int IMPROVED_MERGE = 8; i?wEd!=w
public final static int HEAP = 9; T.(C`/VM
ZLDO&}
public static void sort(int[] data) { "DO|B=EejP
sort(data, IMPROVED_QUICK); |N5r_V
} ~=GwNo_
private static String[] name={ P2Jo^WS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RGgePeaw
}; ^F)t>K$0m
Mz7qC3Z
private static Sort[] impl=new Sort[]{ knn9s0'Q
new InsertSort(), nsL"'iQ
new BubbleSort(), b>h L*9
new SelectionSort(), gmqA 5W~y
new ShellSort(), &]"Z x0t5%
new QuickSort(), 'XJqh|G
new ImprovedQuickSort(), LZtO Q__B)
new MergeSort(), &|-jU+r}B
new ImprovedMergeSort(), ?B+]Ex(\B,
new HeapSort() {x,d9I
}; )\KU:_l
~xLo0EV"
public static String toString(int algorithm){ oRo[WQla
return name[algorithm-1]; ~4+ICCbH
} M!YGv
A$g'/QM
public static void sort(int[] data, int algorithm) { BT)PD9CN(
impl[algorithm-1].sort(data); WA6reZ
} P5KpFL`B
'4Drs}j5
public static interface Sort { P3!JA)p6a
public void sort(int[] data); `pb=y}
} D\^mh{q(
5BJn_<
public static void swap(int[] data, int i, int j) { H Y~[/H+:
int temp = data; vA"LV+@
data = data[j]; ."Kp6s`k
data[j] = temp; gy1R.SN
} 9Y:Iha`$w
} L\hid/NL