[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; 78uImC*o
} q2vD)r
int i1=l; 1N8] ~j
int i2=mid+1; {,Q)D$i
for(int cur=l;cur<=r;cur++){ phuiLW{&
if(i1==mid+1) *9EwZwE_K
data[cur]=temp[i2++]; Yt]`>C[|D
else if(i2>r) 2!J#XzR0W
data[cur]=temp[i1++]; II=`=H{
else if(temp[i1] data[cur]=temp[i1++]; 1@}F8&EZ
else <|}Z6Ti
data[cur]=temp[i2++]; `Npa/Q
} xo_STLAw
} rMDvnF
rF-SvSj}
} *#mmk1`
RW. qw4
改进后的归并排序: 9efDM
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package org.rut.util.algorithm.support; K {' atc
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import org.rut.util.algorithm.SortUtil; SN}K=)KF#
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/** S{+t>en
* @author treeroot x|0C0a\"A
* @since 2006-2-2 2`$*HPj+G
* @version 1.0 gT+g@\u[
*/ V#7,vas
public class ImprovedMergeSort implements SortUtil.Sort { NZB*;U~t
c,~uurVi
private static final int THRESHOLD = 10; bkV<ZUW|;
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/* [Km{6L&
* (non-Javadoc) Dt: Q$
* pux IJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rFg$7
*/ o72r `2
public void sort(int[] data) { -qIi.]/f"9
int[] temp=new int[data.length]; f CU]
mergeSort(data,temp,0,data.length-1); *#Cx-J
} aj&L ZDD6
t{]Ew4Y4%O
private void mergeSort(int[] data, int[] temp, int l, int r) { U6M~N0)Yr
int i, j, k; ; j!dbT~5
int mid = (l + r) / 2; U#[&(
if (l == r) 1!v{#w{u7
return; S;% &X
if ((mid - l) >= THRESHOLD) ,<Q
mergeSort(data, temp, l, mid); u5oM;#{@-
else |2j,
insertSort(data, l, mid - l + 1); = j1Jl^[
if ((r - mid) > THRESHOLD) >a?Bk4w
mergeSort(data, temp, mid + 1, r); v1OVrk>s>
else fvC,P#z'|
insertSort(data, mid + 1, r - mid); Ss>pNH@c
|U|>YA1[b
for (i = l; i <= mid; i++) { J\@6YU[A
temp = data; R.^]{5
} f*o
for (j = 1; j <= r - mid; j++) { Njc@5*rJ&
temp[r - j + 1] = data[j + mid]; VHD+NY/
} WywS1viD
int a = temp[l]; BPO5=]W 7
int b = temp[r]; X0;u7g2Yz
for (i = l, j = r, k = l; k <= r; k++) { =0ZRGp
if (a < b) { !?P8[K
data[k] = temp[i++]; xuK"pS
a = temp; \?xM%(:<Q
} else { V"YeF:I
data[k] = temp[j--]; A(FnU:
b = temp[j]; FCEy1^u
} %~!4DXrMk
} 1+FVM\<&
} MGR:IOTa
YRu@; `
/** ojd0um6I{
* @param data ~1uQyt
* @param l >yC=@Uq+
* @param i U,=f};
*/ X4V>qHV72
private void insertSort(int[] data, int start, int len) { 5#DMizv6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bJ^h{]
} \Bo%2O%4
} !D??Y^6bI
} Nz dN4+
} ukiWNF/
aK_5@8+ZD
堆排序： F)^0R%{C
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package org.rut.util.algorithm.support; RA0;f'"`
) D@j6r
import org.rut.util.algorithm.SortUtil; oYqHl1cs
7f>=-sv
/** B>53+GyMV
* @author treeroot ok:uTeJI
* @since 2006-2-2 S1QMS
* @version 1.0 uM2@&)u
*/ AF'<
public class HeapSort implements SortUtil.Sort{ %(YQ)=w
`Lr], >aG
/* (non-Javadoc) /|?$C7%a\D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h&0zR#t
*/ cC/h7odY
public void sort(int[] data) { PgkU~68`
MaxHeap h=new MaxHeap(); Ob$``31{s
h.init(data); w(oK
for(int i=0;i h.remove(); e5'I W__
System.arraycopy(h.queue,1,data,0,data.length); h4;kjr}h}
} jK w 96
G2`z?);1b
private static class MaxHeap{ ~5KcbGD~
`c
void init(int[] data){ y!FO
this.queue=new int[data.length+1]; | b'Ut)E
for(int i=0;i queue[++size]=data; 6<lo0PQ"Z
fixUp(size); _Sr}3
} Geq]wv8
} l2 .S^S
`2.c=,S{
private int size=0; 1VJ${\H]
pD<w@2K
private int[] queue; $.`o
ER"69zQg|2
public int get() { ofy"SM
return queue[1]; CWdsOS=
} T fLqxioqZ
J"r?F0
public void remove() { (D>_O$o
SortUtil.swap(queue,1,size--); V^_A{\GK
fixDown(1); {-Y;!
} :iE b^F}
file://fixdown `ASDUgx Mq
private void fixDown(int k) { JK/{IkF
int j; :;{M0
while ((j = k << 1) <= size) { Btm,'kBG
if (j < size %26amp;%26amp; queue[j] j++; 9j2t|D4uT
if (queue[k]>queue[j]) file://不用交换 @c|=onx5
break; 2) X#&IE
SortUtil.swap(queue,j,k); .6wPpLG?{
k = j; & zDuh[j}
} f.6>6%l
} dNe!X0[
private void fixUp(int k) { iWCYK7c@.-
while (k > 1) { xC)bW,%
int j = k >> 1; 6GxLaI
if (queue[j]>queue[k]) &S>{9y%
break; zdYH9d>D
SortUtil.swap(queue,j,k); p2STy\CS
k = j; h@%Xy(/m'
} 6 >kULp
} "^]gIQc
D+7xMT8pqH
} CS[]T9|_
{++EX2
} a/J<(sak~X
8C3k: D[
SortUtil： tMl y*E
rq%]CsRY5
package org.rut.util.algorithm; Ln>!4i+-B)
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import org.rut.util.algorithm.support.BubbleSort; i2<z"v63
import org.rut.util.algorithm.support.HeapSort; u&zY>'}zm
import org.rut.util.algorithm.support.ImprovedMergeSort; 5 ^{~xOM5
import org.rut.util.algorithm.support.ImprovedQuickSort; *Soi
import org.rut.util.algorithm.support.InsertSort; 'kd}vq#|
import org.rut.util.algorithm.support.MergeSort; 63fYX"
import org.rut.util.algorithm.support.QuickSort; )@wC6Ij
import org.rut.util.algorithm.support.SelectionSort; e;.,x 5+
import org.rut.util.algorithm.support.ShellSort; X$kLBG[o_
~~>m
/** !5*VBE\
* @author treeroot p4VARAqi
* @since 2006-2-2 I*rUe#$
* @version 1.0 kvbZx{s
*/ !JCs'?A
public class SortUtil { 7By7F:[b
public final static int INSERT = 1; ?|M-0{
public final static int BUBBLE = 2; v-8>@s jy8
public final static int SELECTION = 3; OUulG16kK
public final static int SHELL = 4; un "I
public final static int QUICK = 5; LK'(OZ
public final static int IMPROVED_QUICK = 6; H{}&|;0
public final static int MERGE = 7; E*'YxI
public final static int IMPROVED_MERGE = 8; Zmu
public final static int HEAP = 9; B}"R@;N
i%i~qTN
public static void sort(int[] data) { opa/+V3E4
sort(data, IMPROVED_QUICK); yy3rh(ea
} I!/32* s1t
private static String[] name={ zhJeTctRz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PD&e6;rj;
}; HoQb.Z
YIe1AF}
private static Sort[] impl=new Sort[]{ ZF7@b/-me
new InsertSort(), k3Yu"GY^
new BubbleSort(), d@3DsE.{i
new SelectionSort(), l,@>J9}Se
new ShellSort(), uaIAVBRcS
new QuickSort(), 0,hs%x>v
new ImprovedQuickSort(), U%vTmdOY
new MergeSort(), <'=!f6Wh
new ImprovedMergeSort(), 971=OEyq*
new HeapSort() \,;glY=M!
}; ".}R$W
~n 'A1
public static String toString(int algorithm){ I0 t#{i
return name[algorithm-1]; HI5NWdfRl
} t'_EcYNS
2}^=NUM\NX
public static void sort(int[] data, int algorithm) { {6u)EJ
impl[algorithm-1].sort(data); J^8j|%h%e
} Dl>tF?=
J4qk^1m.
public static interface Sort { 5o6IpF0V
public void sort(int[] data); hb3n- rO
} k+_>`Gre}
O*N:A[eW
public static void swap(int[] data, int i, int j) { jIKg* @
int temp = data; n@pwOHQn<|
data = data[j]; ed'[_T}T3t
data[j] = temp; c]pz&
} QQAEG#.5
} 5*z>ez2YQ7