[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; 9oKRu6]D-
} N]KqSpPh
int i1=l; l"CHI*
int i2=mid+1; 7yeZ+lD
for(int cur=l;cur<=r;cur++){ PM[6U#
if(i1==mid+1) e7]IEBbX2O
data[cur]=temp[i2++]; {Y`0}
else if(i2>r) \8ulX>]
data[cur]=temp[i1++]; EpOVrk
else if(temp[i1] data[cur]=temp[i1++]; M}(4>W
else @2YO_rL[
data[cur]=temp[i2++]; oJ{)0;<~L
} Z TjlGU `
} f>#\'+l'
oYlq1MB?
} gA" =so
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改进后的归并排序: 0t/S_Q
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package org.rut.util.algorithm.support; ds5<4SLj
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import org.rut.util.algorithm.SortUtil; n." j0kc7=
#uuwzE*M_
/** G5TdAW
* @author treeroot cMC1|3
* @since 2006-2-2 @<>](4D
* @version 1.0 ndF Kw
*/ Kqhj=B
public class ImprovedMergeSort implements SortUtil.Sort { gAv?\9=a)W
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private static final int THRESHOLD = 10; <%qbU-
9#O"^.Z !
/* "%,zB_ng\<
* (non-Javadoc) n;v8Vc'
* kIU"-;5tP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hh:0m\@<
*/ JOenVepQ,
public void sort(int[] data) { J5@_OIc1y
int[] temp=new int[data.length]; \DeZY97p%
mergeSort(data,temp,0,data.length-1); tnRq?
} T(J&v|FK
"84.qgYaG
private void mergeSort(int[] data, int[] temp, int l, int r) { w`F}3zm
int i, j, k; top3o{4
int mid = (l + r) / 2; wy:.
if (l == r) EBK\.[
return; R0oP##]
if ((mid - l) >= THRESHOLD) u^!-Z)W
mergeSort(data, temp, l, mid); y])xP%q2O
else dYfVox;
insertSort(data, l, mid - l + 1); ]7h&ZF
if ((r - mid) > THRESHOLD) z4UeUVfZ}
mergeSort(data, temp, mid + 1, r); Pg*ZQE[ME8
else D'uzH|z8
insertSort(data, mid + 1, r - mid); sx`C<c~u
WXO@oZ!
for (i = l; i <= mid; i++) { qI8{JcFx:
temp = data; xCoQ>.4p
} Ms{v;fT
for (j = 1; j <= r - mid; j++) { -_b}b)2iYN
temp[r - j + 1] = data[j + mid]; 9.vHnMcq
} Nl;rg*@o
int a = temp[l]; A4%0
int b = temp[r]; {^MR^4&}(
for (i = l, j = r, k = l; k <= r; k++) { k9yA#
if (a < b) { <Ni]\-*
data[k] = temp[i++]; }{j[
a = temp; 47ir QK*
} else { 5:^dyF&sm{
data[k] = temp[j--]; B0Xn9Tvk
b = temp[j]; Q'$aFl'NR
} 2)4{
} q SCt=eQ
} 96MRnj*Y[
`(*5yXC
/** HbZ3QWP
* @param data - bFz
* @param l G>*s+
* @param i ywi Shvi8
*/ 6`X#<#_&
private void insertSort(int[] data, int start, int len) { ugUV`5w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j&Z:|WniK
} i>b^n+74>
} BR"*-$u0;
} /F/`?=1<$
} NrS1y"#d9
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堆排序： =_.Zv
iwrdZLE
package org.rut.util.algorithm.support; )9L1WOGi
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import org.rut.util.algorithm.SortUtil; jr~76
!C#q
/** 8h;1(S)*Z
* @author treeroot 8M(N
* @since 2006-2-2 0~an\4nh
* @version 1.0 (_U&EX%
*/ N @]*E
public class HeapSort implements SortUtil.Sort{ `9b D%M
<(s+
/* (non-Javadoc) s{<rc>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MEq ()}7P
*/ 1wGd5>GDA
public void sort(int[] data) { NZdQz
MaxHeap h=new MaxHeap(); i aP+Vab
h.init(data); j_p.KF'[?
for(int i=0;i h.remove(); d~GT w:
System.arraycopy(h.queue,1,data,0,data.length); 9dy"Y~c
} o8Q(,P
!7^fji
private static class MaxHeap{ 2JtGS-t
ed>_=i
void init(int[] data){ M7!&gFv8
this.queue=new int[data.length+1]; (w"zI!
for(int i=0;i queue[++size]=data; d3^LalAp
fixUp(size); 63-`3R?;
} #Cbn"iYee
} WpSdukXY{
ZaXK=%z
private int size=0; 3lA<{m;V
k{"~G#GwP
private int[] queue; %# J8cB
RQ}x7</{
public int get() { 8oN4!#:
return queue[1]; AVyo)=&
} BC!l)2
f85j?Jm
public void remove() { 1`B5pcuI
SortUtil.swap(queue,1,size--); z\fD}`^8
fixDown(1); <[l2]"Q
} M*aE)D '
file://fixdown C+-~Gmrb(7
private void fixDown(int k) { H-7*)D
int j; 1sn!!
while ((j = k << 1) <= size) { v_)cp9d]
if (j < size %26amp;%26amp; queue[j] j++; ^>[DG]g
if (queue[k]>queue[j]) file://不用交换 +(UrqK4Av
break; ?#slg8[
SortUtil.swap(queue,j,k); jVk|(
k = j; &<.Z4GxS
} mxGvhkj
} o.}^6.h"
private void fixUp(int k) { &&JI$x0;
while (k > 1) { <fs2;
int j = k >> 1; klJDYFX=HK
if (queue[j]>queue[k]) ] p'+F
break; M}/%t1^g:
SortUtil.swap(queue,j,k); EzzzH(!j
k = j; 3)42EM'9(
} -^\k+4;
} p~Dm3^Y
UxD1+\N6?
} sOU_j4M{
R0*DfJS:Z
} uTB;Bva
otX#}} +
SortUtil： &v3r#$Hj[
988aF/c
package org.rut.util.algorithm; `d3S0N6@
g<}EL[9[J
import org.rut.util.algorithm.support.BubbleSort; P{QRmEE
import org.rut.util.algorithm.support.HeapSort; CcAsJX~_
import org.rut.util.algorithm.support.ImprovedMergeSort; v+G}n\F
import org.rut.util.algorithm.support.ImprovedQuickSort; a[Txd=b
import org.rut.util.algorithm.support.InsertSort; dA\>z[n=
import org.rut.util.algorithm.support.MergeSort; rYN`u
import org.rut.util.algorithm.support.QuickSort; k_O"bsI)
import org.rut.util.algorithm.support.SelectionSort; LUS7-~:F
import org.rut.util.algorithm.support.ShellSort; 90I)"vfW5
EkWe6m
/** Qpf BM
* @author treeroot U|U/B
* @since 2006-2-2 ): Q5u6
* @version 1.0 ~3f#cEP>d}
*/ [>Q{70 c[
public class SortUtil { 9OT2yCT
public final static int INSERT = 1; &\Cvrxa
public final static int BUBBLE = 2; EB@!?=0x
public final static int SELECTION = 3; a-i#?hld
public final static int SHELL = 4; 4B (*{
public final static int QUICK = 5; K%Q^2"Eb0
public final static int IMPROVED_QUICK = 6; Mt@K01MI%
public final static int MERGE = 7; &sx/qS#,VL
public final static int IMPROVED_MERGE = 8; { H9pF2C
public final static int HEAP = 9; 0Xk;X1Xl
w[4SuD
public static void sort(int[] data) { Dtd bQF
sort(data, IMPROVED_QUICK); pc-'+7Dh>
} <|Z0|sel
private static String[] name={ ,EwJg69
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -cq ~\m^6
}; B;1wnKdj
4_r8ynq{z
private static Sort[] impl=new Sort[]{ 7^|3TTK
new InsertSort(), u$<FKp;I
new BubbleSort(), _;LHC;,:
new SelectionSort(), b2p<!?
new ShellSort(), DB?_E{y]
new QuickSort(), <JZ=K5
new ImprovedQuickSort(), L=HL1Qe$G]
new MergeSort(), ax7 M
new ImprovedMergeSort(), Z.<1,EKi=
new HeapSort() z^B!-FcIz>
}; +H="5uO<
~xvQ?c?-
public static String toString(int algorithm){ :I<%.|8
return name[algorithm-1]; 8eOQRC33
} *bv Iqa
L/<Up
public static void sort(int[] data, int algorithm) { ?>lmLz!e
impl[algorithm-1].sort(data); `I m;@_J
} |C-B=XE;3
O5k's
public static interface Sort { -U*XA
public void sort(int[] data); xZ9y*Gv\=
} \V: _Zs
A9lqVMp64
public static void swap(int[] data, int i, int j) { /I6?t=?<
int temp = data; hk,Q=};
data = data[j]; ?cg+RNI
data[j] = temp; If4YqBG
} !4oYQB
} h)A+5^:^