[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; ]6 HR
} q@^^jlHP
int i1=l; *iN5/w{VG
int i2=mid+1; VaW^;d#
for(int cur=l;cur<=r;cur++){ ?Rk[P cX<
if(i1==mid+1) jL7r1pu5
data[cur]=temp[i2++]; rEMe=>^
else if(i2>r) P6I<M}p
data[cur]=temp[i1++]; +MqJJuWB
else if(temp[i1] data[cur]=temp[i1++]; 6)PnzeYW
else <L('RgA@X
data[cur]=temp[i2++]; ([dwZ6$/J
} y`i?Qo3
} :}R,a=N
m5o$Dus+?'
} /9A6"Z
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改进后的归并排序: ~"\WV4}`v
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package org.rut.util.algorithm.support; P}^Y"zF2
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import org.rut.util.algorithm.SortUtil; EOZ 6F-':
w~q ]&
/** >,QCKZH
* @author treeroot FUXJy{n6"2
* @since 2006-2-2 ))dw[Xa
* @version 1.0 yEos$/*u-N
*/ jz~#K;3=,
public class ImprovedMergeSort implements SortUtil.Sort { Ai"MJ6)
psse^rFg
private static final int THRESHOLD = 10; m] yUcj{F
73B[|J*
/* )4h|7^6ji
* (non-Javadoc) !Eg2#a?
* P3IBi_YyG1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tDavp:M1v
*/ NJSbS<O
public void sort(int[] data) { Fe %Vp/
int[] temp=new int[data.length]; 8f1M6GK?
mergeSort(data,temp,0,data.length-1); teI?.M9r
} C4qK52'2s
c&P/v#U_
private void mergeSort(int[] data, int[] temp, int l, int r) { k&uh
int i, j, k; s)fahc(@E
int mid = (l + r) / 2; ;5.<M<PH
if (l == r) LEOri=?RF
return; ?A3u2-
if ((mid - l) >= THRESHOLD) OSfT\8YA
mergeSort(data, temp, l, mid); 5]up%.
else {8qcM8
insertSort(data, l, mid - l + 1); 7M _ mR Vh
if ((r - mid) > THRESHOLD) .zl[nx[9"D
mergeSort(data, temp, mid + 1, r); }K@m4`T
else P(FlU]q
insertSort(data, mid + 1, r - mid); "O-X*>?f
SSCs96
for (i = l; i <= mid; i++) { ul~6zBKO
temp = data; b !y
} |5%T)
for (j = 1; j <= r - mid; j++) { n$XEazUb0N
temp[r - j + 1] = data[j + mid]; Wz#Cyjo
} /t`,7y3T
int a = temp[l]; ?hGE[.(eh]
int b = temp[r]; NP\mzlI~@
for (i = l, j = r, k = l; k <= r; k++) { =4'V}p
if (a < b) { KO7&dM
data[k] = temp[i++]; +lfO4^V
a = temp; -.y1]4
} else { ,}]v7DD
data[k] = temp[j--]; :*&c'
b = temp[j]; n?$c"}
} W7'<Jom|?
} ?>U=bA
} dt@c,McN|Q
{Q37a=;,
/** j5Da53c#^
* @param data 9PA<g3z
* @param l M49l2x=]9
* @param i K:jn^JN$
*/ ^\Z+Xq1~/
private void insertSort(int[] data, int start, int len) { AEaN7[PQx|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |hw.nY]J
} 3~bB2APk
} yyljyE
} [520!JhZY
} U;WwEta ]
jd-ccnR l
堆排序： Ky"FL
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package org.rut.util.algorithm.support; h'};spv
Q&vdBO/
import org.rut.util.algorithm.SortUtil; J<+f7L
?RS:I%bL
/** z`t~N
* @author treeroot {pH#zs4Y
* @since 2006-2-2 d1\nMm}v
* @version 1.0 G 3,v'D5
*/ ssx#|InY
public class HeapSort implements SortUtil.Sort{ K$Vu[!l`
c'tQA
/* (non-Javadoc) eK l;T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hXth\e\[{`
*/ u%e~a]
public void sort(int[] data) { 3.?be.cq
MaxHeap h=new MaxHeap(); &l7E|.JE
h.init(data); KS93v9|
for(int i=0;i h.remove(); 6QY;t:/<
System.arraycopy(h.queue,1,data,0,data.length); kMurNA=
} Uzzm2OS`
|&JeJ0k>~
private static class MaxHeap{ ciN\SA ZY
96<oX:#
void init(int[] data){ Ve|:k5z
this.queue=new int[data.length+1]; p__wBUB
for(int i=0;i queue[++size]=data; \H:T)EVy
fixUp(size); -)oUb=Lk{
} \alV #>J5
} >*h+N? m
W6i{yneW
private int size=0; bg-/ 8,
Dho6N]86r
private int[] queue; i cTpx#|=
iO5g30l
public int get() { dREY m}1
return queue[1]; hA5')te<
} k*fU:q1
WM ?a1j
public void remove() { *"8Ls0!
SortUtil.swap(queue,1,size--); 9%T"W
fixDown(1); {:uv}4Z
} 1Y'4 g3T
file://fixdown 5F~l;zT
private void fixDown(int k) { v>} +->f
int j; Blzvn19'h
while ((j = k << 1) <= size) { '^_u5Y]
if (j < size %26amp;%26amp; queue[j] j++; NgGMsE\C}
if (queue[k]>queue[j]) file://不用交换 !="q"X/*
break; -Y/i h(I^
SortUtil.swap(queue,j,k); +n;nvf}(
k = j; lJu^Bcrv
} 7amVnR1f
} Om0$6O
private void fixUp(int k) { pVy=rS-
while (k > 1) { WZNq!K H
int j = k >> 1; Cr7Zi>sd<!
if (queue[j]>queue[k]) !Rl|o^Vw>{
break; oM~y8O
SortUtil.swap(queue,j,k); =9a2+v0
k = j; 8mreHa
} :9UgERjra
} t Y
/=/Ki%hh
} =WY'n l'
wI_@
} _K~h? \u
AYA{_^#+3
SortUtil： $5&%X'jk
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package org.rut.util.algorithm; uPz+*4+
}~I!'J#)
import org.rut.util.algorithm.support.BubbleSort; c}o 6Rm50
import org.rut.util.algorithm.support.HeapSort; D9oNYF-V
import org.rut.util.algorithm.support.ImprovedMergeSort; h4pS~/
import org.rut.util.algorithm.support.ImprovedQuickSort; l!|c_
import org.rut.util.algorithm.support.InsertSort; `uMEK>b
import org.rut.util.algorithm.support.MergeSort; X=$Jp.
import org.rut.util.algorithm.support.QuickSort; .c"nDCFVR
import org.rut.util.algorithm.support.SelectionSort; Wm}c-GD
import org.rut.util.algorithm.support.ShellSort; Q4"\k. ?
crM5&L9zF
/** 1(?4*v@B
* @author treeroot u<BU4c/p
* @since 2006-2-2 BY6#dlDi
* @version 1.0 &$~fz":1!
*/ YJ _eE
public class SortUtil { F<* /J]
public final static int INSERT = 1; >D,Oav
public final static int BUBBLE = 2; 15g!Q *v
public final static int SELECTION = 3; !wy _3a
public final static int SHELL = 4; X1| +9
public final static int QUICK = 5; EU?qLj':
public final static int IMPROVED_QUICK = 6; 2a$.S" ?
public final static int MERGE = 7; EjR(AqZY
public final static int IMPROVED_MERGE = 8; uks75W!}U
public final static int HEAP = 9; OM\J4"YV$
t}q e_c
public static void sort(int[] data) { +vh|m5"7I7
sort(data, IMPROVED_QUICK); i 9) Gt
} OpUfK4U)
private static String[] name={ *'/,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bs~~C8+
}; OsgPNy0
*4cuWkQ,
private static Sort[] impl=new Sort[]{ &BVHQ7[
new InsertSort(), -N45ni87
new BubbleSort(), 4era5=
new SelectionSort(), 5p0~AN)
new ShellSort(), RaJTya^
new QuickSort(), .a*?Pal@@
new ImprovedQuickSort(), k"N>pjgd$
new MergeSort(), r6DLShP-Ur
new ImprovedMergeSort(), OdzeHpH3g
new HeapSort() |#TU"$;
}; H5K Fm#
Nm*(?1
public static String toString(int algorithm){ MpCPY"WLL
return name[algorithm-1]; hg)Xr5>
} \`n(JV
iGW|j>N
public static void sort(int[] data, int algorithm) { c+:ZmrP/
impl[algorithm-1].sort(data); *QC6zJ
} 7H6Ts8^S
\]ib%,:YU
public static interface Sort { F]$ Nu
public void sort(int[] data); m%HT)`>bg
} }je<^]a
/UCBoQ$/]
public static void swap(int[] data, int i, int j) { 7H7 Xbi@
int temp = data; ^h[6{F~J
data = data[j]; K.Xy:l*z
data[j] = temp; 7>Scf
} q7B5#kb
} 7)rQf{q7