[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; T*8S7l
} T~L V\}h
int i1=l; gMZ+kP`
int i2=mid+1; _NwHT`O[
for(int cur=l;cur<=r;cur++){ LXJ;8uW2y
if(i1==mid+1) 9@IL547V
data[cur]=temp[i2++]; qQ3pe:n?
else if(i2>r) 2"shB(:z>
data[cur]=temp[i1++]; QBi]gT@&g
else if(temp[i1] data[cur]=temp[i1++]; }CZw'fhVWO
else JC9$"0d7
data[cur]=temp[i2++]; g]N'6La
} }kItVx
} n'q:L(`M
K0B<9Wi|
} Fv)E:PnKC
g)ZMU^1
改进后的归并排序: O^6anUV0
D@.qdRc3
package org.rut.util.algorithm.support; .#iot(g
/d!
import org.rut.util.algorithm.SortUtil; Og@{6>
$`%Om WW{
/** JKrS;J^97v
* @author treeroot ~b X~_\
* @since 2006-2-2 &%@O V:C
* @version 1.0 G3]#Du
*/ 7TI6EKr
public class ImprovedMergeSort implements SortUtil.Sort { Z1v~tqx
b$Dh|-8
private static final int THRESHOLD = 10; QY<5o;m`
'+vmC*-I(
/* Rrl
* (non-Javadoc) ZQ*Us*9I
* D*PEIsV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m__pQu:
*/ l1O"hd'~s
public void sort(int[] data) { o[WDPIG
int[] temp=new int[data.length]; Z zp"CK 5
mergeSort(data,temp,0,data.length-1); <-N2<sl
} uifVSf*
L@zhbWY
private void mergeSort(int[] data, int[] temp, int l, int r) { h7T),UL
int i, j, k; -/Wf iE
int mid = (l + r) / 2; &dK!+
if (l == r) "dDrw ]P;
return; W\w#}kY
if ((mid - l) >= THRESHOLD) FY^Nn
mergeSort(data, temp, l, mid); |S|'o*u
else [Y@>,B!V
insertSort(data, l, mid - l + 1); ;y1/b(t
if ((r - mid) > THRESHOLD) yf8kBT:&S
mergeSort(data, temp, mid + 1, r); "8cI]~V
else &|RTLGwX
insertSort(data, mid + 1, r - mid); vlEW{B;)Z
t#t[cgI
for (i = l; i <= mid; i++) { gJrWewEe
temp = data; hLk6Hqr7
} %OO}0OW
for (j = 1; j <= r - mid; j++) { mb1c9
temp[r - j + 1] = data[j + mid]; *W^ZXhrZ
} r;[=y<Yf
int a = temp[l]; +DR$>a
int b = temp[r]; =Tl_~OR
for (i = l, j = r, k = l; k <= r; k++) { T{f$S
if (a < b) { Qe ip h
data[k] = temp[i++]; J,u-)9yBA<
a = temp; fG$LqzyqlK
} else { #qDm)zCM
data[k] = temp[j--]; !d!u{1Y&
b = temp[j]; pPo xx"y
} cgQ6b.
} Myiv#rQ)
} 4G&dBH
iT,7jd?6#
/** 2E!~RjxSY
* @param data w( XZSE
* @param l SUUN_w~
* @param i 3z2 OW@zL$
*/ 6(4d3}F
private void insertSort(int[] data, int start, int len) { 6Xm'^T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :N$-SV
} r-.@MbBm
} j4!O,.!T
} {)!>e
} +FqE fY4j
5Lej_uqF
堆排序： 51#OlvD
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package org.rut.util.algorithm.support; y;8&J{dd
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import org.rut.util.algorithm.SortUtil; (?zD!% k
<"P-7/j3j
/** hdrsa}{g
* @author treeroot \y=oZk4
* @since 2006-2-2 q^EY?;Y
* @version 1.0 X<[ qX*
*/ |3@DCbT
public class HeapSort implements SortUtil.Sort{ 9_O4yTL
23>[-XZb[O
/* (non-Javadoc) a6e{bAuq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xw!\,"{s
*/ %%uE^nX>
public void sort(int[] data) { 1d]F$>
MaxHeap h=new MaxHeap(); u YT$$'S
h.init(data); G7al@
for(int i=0;i h.remove(); JDE_*xaUV
System.arraycopy(h.queue,1,data,0,data.length); VLkAsM5}%
} LjG^c>[:m
eJHh}
private static class MaxHeap{ g]2L[4
l$/lbwi%
void init(int[] data){ Q^rR}Ws
this.queue=new int[data.length+1]; :\His{%
for(int i=0;i queue[++size]=data; %'HDP3
fixUp(size); I_u/
} 8iJB'#''*
} RK|*yt"f"
lYQ|NL():
private int size=0; qclc--fsE
}>0>OqvF
private int[] queue; yivu|q
&.*UVc2+Y
public int get() { 4.jRTL5-oj
return queue[1]; Ls9NQy
} cpltTJFg
@q/g%-WNz
public void remove() { NEri{qxm
SortUtil.swap(queue,1,size--); gaY&2
fixDown(1); >dt*^}*
} ~,HFd`
file://fixdown qEST[S V
private void fixDown(int k) { J}X{8Ds9
int j; FHSoj=
while ((j = k << 1) <= size) { :Tg+)cZ
if (j < size %26amp;%26amp; queue[j] j++; 67& hXIp
if (queue[k]>queue[j]) file://不用交换 &S*~EM.l8
break; ,=m.WmXE
SortUtil.swap(queue,j,k); Jd>~gA}l
k = j; s51$x M
} J @"#
} 5h#h>0F
private void fixUp(int k) { .w.:o2L
while (k > 1) { LJ(WU)CPc
int j = k >> 1; = (F
if (queue[j]>queue[k]) "lL+Heq>V
break; -y+>^45
SortUtil.swap(queue,j,k); :OY~Q3 @
k = j; 'cXdc
} +&`W\?.~
} !=,4tg`
"S%t\
} `NsjtT'_
sV
} .9qK88fUR
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SortUtil： uPA (1
7mi!yTr}
package org.rut.util.algorithm; F`nQS&y
Z nc(Q
import org.rut.util.algorithm.support.BubbleSort; eyJ07
import org.rut.util.algorithm.support.HeapSort; GlAI~\A
import org.rut.util.algorithm.support.ImprovedMergeSort; p?:5U[KM
import org.rut.util.algorithm.support.ImprovedQuickSort; 5:h[%3'bB
import org.rut.util.algorithm.support.InsertSort; Nujnm$!,Q
import org.rut.util.algorithm.support.MergeSort; =#b@7Yw:
import org.rut.util.algorithm.support.QuickSort; -Ks>s
import org.rut.util.algorithm.support.SelectionSort; w6% Q"%rp
import org.rut.util.algorithm.support.ShellSort; m.e]tTe
f V. c6
/** !.]JiT'o
* @author treeroot 7z{wYCw
* @since 2006-2-2 -1g:3'% P
* @version 1.0 %SM;B-/zHt
*/ +J X;T(T
public class SortUtil { g\JJkXjD#
public final static int INSERT = 1; @LKQ-<dZG
public final static int BUBBLE = 2; yLX $SR
public final static int SELECTION = 3; ATNOb
public final static int SHELL = 4; 1PkCWRpR
public final static int QUICK = 5; @^W`Yg)C
public final static int IMPROVED_QUICK = 6; 18>cfDh;N
public final static int MERGE = 7; %t9C
public final static int IMPROVED_MERGE = 8; DmiBM6t3N
public final static int HEAP = 9; N6Ud(8*
W_\zx<m
public static void sort(int[] data) { %fqR
sort(data, IMPROVED_QUICK); wSTulo:9
} hArY$T&MB
private static String[] name={ TC\+>LXiZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9t"Rw ns
}; ?['!0PF
}vd*eexA
private static Sort[] impl=new Sort[]{ SiratkP9n7
new InsertSort(), SAx9cjj+
new BubbleSort(), a:h<M^n049
new SelectionSort(), {m.$EoS
new ShellSort(), G'ykcB._
new QuickSort(), :gh[BeqQ)
new ImprovedQuickSort(), ?{{w[U6NE
new MergeSort(), |cPHl+$nh.
new ImprovedMergeSort(), o\IMYT
new HeapSort() uepyH
}; qLN^9PdEE
c3A\~tHW
public static String toString(int algorithm){ }htjT/Nm
return name[algorithm-1]; dj0; tQ=C
} tMIYVHGy
]A#lV$
public static void sort(int[] data, int algorithm) { ggr
impl[algorithm-1].sort(data); \hB BG8=&
} <uH8Fivb
`FP?9R6Y
public static interface Sort { WNjwv/
public void sort(int[] data); kN1MPd4Yh
} NO"PO @&Wk
AZtS4]4G)
public static void swap(int[] data, int i, int j) { E$e7(D
int temp = data; ~4S$+*'8
data = data[j]; rz?Cn X.t
data[j] = temp; C6_(j48&
} ?Ec9rM\ze
} RU)35oEV|