[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; 0Bp0ScE|FA
} 7Dl^5q.|
int i1=l; }id)~h_@
int i2=mid+1; ,wg(}y'
for(int cur=l;cur<=r;cur++){ .Jg<H %%f
if(i1==mid+1) n#WOIweInf
data[cur]=temp[i2++]; ? eI)m
else if(i2>r) N4-Y0BO
data[cur]=temp[i1++]; /Us+>vg!
else if(temp[i1] data[cur]=temp[i1++]; dc~vQDNw[X
else K%BFR,)g
data[cur]=temp[i2++]; J0e^v
} :N^B54o%6
} s"nntC
Z ]ZUK
} fM:bXR2Y'
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改进后的归并排序: ;sf'"UnL
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package org.rut.util.algorithm.support; ASMItT
-:L7iOzgD
import org.rut.util.algorithm.SortUtil; PIFZ '6gn
s5{H15
/** ^mI`P}5Y
* @author treeroot j!Ys/D
* @since 2006-2-2 SI%J+Y7
* @version 1.0 SJj_e-
*/ #=Xa(<t
public class ImprovedMergeSort implements SortUtil.Sort { ujX\^c
>b3IZ^SB#$
private static final int THRESHOLD = 10; >dF #1
1yU!rEH
/* OEbZs-:
* (non-Javadoc) c<cYX;O
* X3gYe-2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TQ/#
*/ _uJ6Vy
public void sort(int[] data) { 5HL>2 e[
int[] temp=new int[data.length]; a04S&ezj
mergeSort(data,temp,0,data.length-1); jamai8
} }l]r-
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private void mergeSort(int[] data, int[] temp, int l, int r) { >[T6/#M
int i, j, k; }c4F}Cy
int mid = (l + r) / 2; Ud>hDOJ3
if (l == r) hN1[*cF
return; n],cs
if ((mid - l) >= THRESHOLD) tC f@v'1t
mergeSort(data, temp, l, mid); 7|"G 3ck
else aa!1w93?i
insertSort(data, l, mid - l + 1); b^8"EBo
if ((r - mid) > THRESHOLD) _Bn8i(
mergeSort(data, temp, mid + 1, r); +&_n[;
else _J"J[$
insertSort(data, mid + 1, r - mid); biffBC:q
ahM?;p
for (i = l; i <= mid; i++) { JL:B4f%}B
temp = data; yFFNzw{
} T%}x%9VO7
for (j = 1; j <= r - mid; j++) { x5U;i
temp[r - j + 1] = data[j + mid]; ,(c'h:@M
} l~kxK.Ru
int a = temp[l]; ^MT20pL
int b = temp[r]; \vj xCkg{
for (i = l, j = r, k = l; k <= r; k++) { =PLy^%
if (a < b) { ;4oKF7]
data[k] = temp[i++]; hE2{m{^A
a = temp; t`\l+L
} else { o1]1I9
data[k] = temp[j--]; 9@Z++J.^y
b = temp[j]; ?PB}2*R
} ;Oqbfl#%
} [vdC$9z,
} =E~SaT
<sGioMr
/** >6;RTN/P2
* @param data ;]/cCi
* @param l JvW!w)$pY
* @param i ,Qe`(vU*s
*/ )GC[xo4bg
private void insertSort(int[] data, int start, int len) { aO\@5i_r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dUceZmAl
} DshRH>7s8
} :J5CmU$
} wLQM]$O
} (%M:=zm
9 &Od7Cn
堆排序： /dVcNo3"
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package org.rut.util.algorithm.support; #M[Cq= 2
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import org.rut.util.algorithm.SortUtil; KiNluGNt
L=<,+m[!
/** uC`)?f*I
* @author treeroot "r{ ^Y??
* @since 2006-2-2 z]i/hU
* @version 1.0 m%OX< T!
*/ #xrE^Txh
public class HeapSort implements SortUtil.Sort{ @|~D?&<\
`jDmbD +=
/* (non-Javadoc) ;wr]_@<~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lCK:5$ z0
*/ (]<G)+*
public void sort(int[] data) { q]*:RI?wGT
MaxHeap h=new MaxHeap(); f6HDfJmE
h.init(data); sE(mK<{pk
for(int i=0;i h.remove(); vnz}Pr! c
System.arraycopy(h.queue,1,data,0,data.length); >Gxu8,_;
} @/?$ZX/e[
oX1{~lDJl
private static class MaxHeap{ opxPK=kJ
ga91#NWgK
void init(int[] data){ fbW#6:Y
this.queue=new int[data.length+1]; Wuji'sxTs
for(int i=0;i queue[++size]=data; MXpj_+@
fixUp(size); m=IA/HOR^
} K:sC6|wG
} 1FC1*7A[
a,p7l$kK
private int size=0; ch}(v'xv(
* @j#13.
private int[] queue; nr{}yQu
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public int get() { s^AZ)k~J(
return queue[1]; 3sGe#s%
} }Rq-IRa'
~7=w,+
public void remove() { Wv)2dD2I
SortUtil.swap(queue,1,size--); We#O'm
fixDown(1); KY;E.D`
} N+ R/ti
file://fixdown 6~Xe$fP(
private void fixDown(int k) { ?x &"EhA>
int j; \LW '6 pQ_
while ((j = k << 1) <= size) { [PW*|U
if (j < size %26amp;%26amp; queue[j] j++; )c<5:c
if (queue[k]>queue[j]) file://不用交换 ;;- I<TL
break; 0bk094
SortUtil.swap(queue,j,k); !ly]{DTmm
k = j; }+f@$L
} re}P
} G;pxB,4s5
private void fixUp(int k) { $X;fz)u
while (k > 1) { X<"W@
int j = k >> 1; :j,e0#+sA
if (queue[j]>queue[k]) t%<d}QuHW
break; zc-.W2"Hu
SortUtil.swap(queue,j,k); <El6?ml@
k = j; +hS}msu'
} :ITz\m
} <)(STo
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} wXsA-H/`
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} #S4{,
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SortUtil： 7uRXu>h
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package org.rut.util.algorithm; .Su9fjy%
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import org.rut.util.algorithm.support.BubbleSort; Nl1v*9_x
import org.rut.util.algorithm.support.HeapSort; "VcG3.
import org.rut.util.algorithm.support.ImprovedMergeSort; t1 .6+
import org.rut.util.algorithm.support.ImprovedQuickSort; wBXgzd%L
import org.rut.util.algorithm.support.InsertSort; 8V3SZ17
import org.rut.util.algorithm.support.MergeSort; K]q OLtc
import org.rut.util.algorithm.support.QuickSort; }3!.e
import org.rut.util.algorithm.support.SelectionSort; ;dYpdy
import org.rut.util.algorithm.support.ShellSort; p68) 0
n2H2G_-L[
/** ?<slB>8
* @author treeroot e&u HU8k*
* @since 2006-2-2 %+9Mr ami
* @version 1.0 PF- sb&q
*/ G}\E{VvWh
public class SortUtil { l$Y7CIH
public final static int INSERT = 1; %-:6#bz
public final static int BUBBLE = 2; l>M&S^/s j
public final static int SELECTION = 3; @Tr8.4
public final static int SHELL = 4; vf(\?Js,
public final static int QUICK = 5; T{j&w%(z
public final static int IMPROVED_QUICK = 6; _>*$%R
public final static int MERGE = 7; A_@#V)D2
public final static int IMPROVED_MERGE = 8; LE!3'^Zq
public final static int HEAP = 9; E-irB/0
I=pTfkTT
public static void sort(int[] data) { fF8g3|p:
sort(data, IMPROVED_QUICK); B;':Eaa@
} R '/Ilz`
private static String[] name={ E7axINca
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]baO{pJi
}; W%.Kr-[?`o
^r$P&}Z\b
private static Sort[] impl=new Sort[]{ mi3yiR
new InsertSort(), e p;_'
new BubbleSort(), nQvv'%v0
new SelectionSort(), %c(':vI#
new ShellSort(), hun/H4f|
new QuickSort(), l23#"gGb
new ImprovedQuickSort(), I"9S
new MergeSort(), !UlG!820
new ImprovedMergeSort(), *B`wQhB%
new HeapSort() [3rvRJ.
}; V5RfxWtm:
,y?0Iwf
public static String toString(int algorithm){ y:Qo:Z~
return name[algorithm-1]; (3"V5r`*;
} #G^?4Za
r/fLm8+
public static void sort(int[] data, int algorithm) { [HK[{M=v=
impl[algorithm-1].sort(data); dGcG7*EX
} (6fh[eK86
xq.,7#3
public static interface Sort { l>S~)FNwXJ
public void sort(int[] data); i%0Ml:Y
} y#^d8 }+
kL,AY-Iu{@
public static void swap(int[] data, int i, int j) { X%S?o
int temp = data; pNI=HHx
data = data[j]; pVPCxP
data[j] = temp; {cKKTDN
} N/mTG2'<
} Cjsy1gA