[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; X DX_c@U
} ,-b9:]{L
int i1=l; ,P|PPx%@
int i2=mid+1; 8C2t0u;Y .
for(int cur=l;cur<=r;cur++){ ax<0grK
if(i1==mid+1) [Y*UCFhI0
data[cur]=temp[i2++]; -zkB`~u_
else if(i2>r) Czp:y8YX-
data[cur]=temp[i1++]; 5~kf:U%~
else if(temp[i1] data[cur]=temp[i1++]; P'K')]D=!
else EW`3h9v~
data[cur]=temp[i2++]; 1/n3qJyx2}
} f6XWA_[i@
} o+na`ed
q\,H9/.0k
} ,wV2ZEW}e
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改进后的归并排序: 8_lD*bEt
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package org.rut.util.algorithm.support; j@DyWm/7
I#0.72:[
import org.rut.util.algorithm.SortUtil; !xvPG
Qhr:d`@^]
/** >#ou8}0
* @author treeroot u/zC$L3B(
* @since 2006-2-2 /b*@dy
* @version 1.0 OjCT%6hy;
*/ xv2;h4{<
public class ImprovedMergeSort implements SortUtil.Sort { vfjIpg%i
BZj[C=#x
private static final int THRESHOLD = 10; QV't+)uUVo
=nsY[ s<
/* ._yr7uY[M
* (non-Javadoc) V7^?jck
* P.wINo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YT_kMy>
*/ 52"/Zr}j
public void sort(int[] data) { 3.jwOFH$
int[] temp=new int[data.length]; NlDM/
mergeSort(data,temp,0,data.length-1); ]}B&-Yp
} 'Go'87+`
+n:#Uf)
private void mergeSort(int[] data, int[] temp, int l, int r) { RI`A<*>w
int i, j, k; " JRlj
int mid = (l + r) / 2; %ry>p(-pC(
if (l == r) &a0%7ea`.S
return; cmI8Xf]"P-
if ((mid - l) >= THRESHOLD) cqq+#39iC
mergeSort(data, temp, l, mid); Dn@ n:m
else :G-1VtE n
insertSort(data, l, mid - l + 1); u Qj#U m8
if ((r - mid) > THRESHOLD) vr;7p[~
mergeSort(data, temp, mid + 1, r); 2c~^|@
else Bm?Ku7}.
insertSort(data, mid + 1, r - mid); UX0tI0.tg
C }[u[)
for (i = l; i <= mid; i++) { 6nDx;x&Q
temp = data; J h"]iN
} i^> RjR
for (j = 1; j <= r - mid; j++) { c:iMbJOn#
temp[r - j + 1] = data[j + mid]; b:JOR@O
} 4>|5B:
int a = temp[l]; $~-j-0 \m
int b = temp[r]; 3aOFpCs|#
for (i = l, j = r, k = l; k <= r; k++) { L`!sV-.
if (a < b) { |N g[^
data[k] = temp[i++]; u-W=~EO5#
a = temp; {kzM*!g
} else { i||YD-hkK
data[k] = temp[j--]; E,X,RM~ +D
b = temp[j]; k"U4E J{
} 07#!b~N
} {L0w&~$Fy
} -lp_~)j^
+2g3%c0}
/** V+8+ 17^
* @param data *vb)d0}P
* @param l &zT~3>2
* @param i 0eLK9u3<
*/ l{R)yTO
private void insertSort(int[] data, int start, int len) { -7`J(f.rYC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :b=0_<G
} v+OVZDf
} pxF!<nN1,
} 5(W9Jj]
} ]]7T5'.
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堆排序： zM'-2,
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package org.rut.util.algorithm.support; e'6?iLpy
usA!MMH4
import org.rut.util.algorithm.SortUtil; EAfSbK3z
<ZiO[dEV
/** 4D13K.h`O
* @author treeroot 71%u|k8|
* @since 2006-2-2 $Yka\tS'
* @version 1.0 `#ztp)&
*/ ox6rR
public class HeapSort implements SortUtil.Sort{ *+AP}\p0F
r$7rYxFR
/* (non-Javadoc) _=] FJhO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +M*a.ra0OF
*/ H,}?YW
public void sort(int[] data) { |2# Ro*
MaxHeap h=new MaxHeap(); }FXRp=s
h.init(data); [h1{{Nb#ez
for(int i=0;i h.remove(); ;w>B}v;RE
System.arraycopy(h.queue,1,data,0,data.length); lySaJd
} `FwAlYJK
<'-me09C*
private static class MaxHeap{ v<wT`hiKW
Go|65Z\`7M
void init(int[] data){ \a!<^|C&
this.queue=new int[data.length+1]; xpM~*Gpm
for(int i=0;i queue[++size]=data; | QA8"&r
fixUp(size); #vSI_rt9I
} 3(%,2
} >UMnItq(l
`Nn?G
private int size=0; YO,ldsSz|r
O^#u%/
private int[] queue; V'.|IuN
AqkK`iJ#
public int get() { N,|oV|i
return queue[1]; u W T[6R
} MeX1y]<It
>y[S?M
public void remove() { _SqrQ
SortUtil.swap(queue,1,size--); '_)tR;s
fixDown(1); mxGN[%ve
} U:r2hqegd
file://fixdown sXxO{aeev
private void fixDown(int k) { 6K}=K?3Z
int j; #4M0%rN
while ((j = k << 1) <= size) { -cgukl4Va
if (j < size %26amp;%26amp; queue[j] j++; (#]KjpIK
if (queue[k]>queue[j]) file://不用交换 ZsZ1
break; IJ;*N
SortUtil.swap(queue,j,k); Ks(U]G"V
k = j; v=VmiBq[
} 7p6J
} k#xpY!'7
private void fixUp(int k) { Kf#!IY][
while (k > 1) { 9 NQq=@
int j = k >> 1; m{c#cR
if (queue[j]>queue[k]) R:?vY!
break; 6^;!9$G|D*
SortUtil.swap(queue,j,k); Wh5O{G@Ut
k = j; BtChG] N|
} AW5g (
} )AXH^&
1o>R\g3
} oE1]vX
Ir #V2]$
} (14kR
<t% A)L%
SortUtil： X>7]g670@
lVtn$frp
package org.rut.util.algorithm; "%*lE0Tx
~79Qg{+]N
import org.rut.util.algorithm.support.BubbleSort; 30+l0\1
import org.rut.util.algorithm.support.HeapSort; WG}CPkj
import org.rut.util.algorithm.support.ImprovedMergeSort; -oBas4J
import org.rut.util.algorithm.support.ImprovedQuickSort; 389.&`Q%Ut
import org.rut.util.algorithm.support.InsertSort; i0Q _f!j
import org.rut.util.algorithm.support.MergeSort; 92VX5?Cyg
import org.rut.util.algorithm.support.QuickSort; _x6E_i-(
import org.rut.util.algorithm.support.SelectionSort; gecT*^
import org.rut.util.algorithm.support.ShellSort; wS*CcIwj
k<zGrq=8J
/** {))S<_yN
* @author treeroot !r obau7
* @since 2006-2-2 N('DIi*or
* @version 1.0 `)M\(_
*/ vx}Z
public class SortUtil { a<jE25t
public final static int INSERT = 1; w })Pedg
public final static int BUBBLE = 2; *jw$d8q2
public final static int SELECTION = 3; u;ooDIq@
public final static int SHELL = 4; W<|K
public final static int QUICK = 5; 9$V_=Bo
public final static int IMPROVED_QUICK = 6; m:fouMS
public final static int MERGE = 7; 8~(+[[TQ@
public final static int IMPROVED_MERGE = 8; 76Vyhf&7
public final static int HEAP = 9; A2:){`Mw
vs)I pV(
public static void sort(int[] data) { X#I`(iHY
sort(data, IMPROVED_QUICK); ;AGs1j
} 6Y_O^f
private static String[] name={ ,x"yZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ->2wrOH|H
}; #C;zS9(]B
n vpPmc
private static Sort[] impl=new Sort[]{ Y:!/4GF
new InsertSort(), +}XL>=-5
new BubbleSort(), nR@,ouB-$
new SelectionSort(), kH8$nkeev
new ShellSort(), 5 (21gW9
new QuickSort(), #w,WwL!
new ImprovedQuickSort(), .1}rzh}8
new MergeSort(), :7Z\3_D/
new ImprovedMergeSort(), PMN2VzE4{
new HeapSort() lc3S|4
}; 9p\Hx#^
K[LVT]3 n
public static String toString(int algorithm){ mB^I@oZ*
return name[algorithm-1]; #ON#4WD?
} Z"n'/S:q
1;Wkt9]9
public static void sort(int[] data, int algorithm) { NM1cyZ
impl[algorithm-1].sort(data); 4)odFq:
} ]o[X+;Tj|
6a%:zgkOpu
public static interface Sort { [Zt# c C+
public void sort(int[] data); ),;D;LI{S
} "ji$@b_\?
Q@e*$<3
public static void swap(int[] data, int i, int j) { E)80S.V
int temp = data; ~N{_N95!2@
data = data[j]; GcZM+c
data[j] = temp; ;-9zMbte:
} Sqdc1zC
} 4j. |Y