[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; %Ybr5$_
} ceae~
int i1=l; n]3Z~HoZ
int i2=mid+1; :#=BwdC
for(int cur=l;cur<=r;cur++){ m" ]VQnQ
if(i1==mid+1) zRB LkrC
data[cur]=temp[i2++]; a@!O}f*
else if(i2>r) a#&\65D
data[cur]=temp[i1++]; $v=(`=
else if(temp[i1] data[cur]=temp[i1++]; }s.\B
else Cjj(v7[E
data[cur]=temp[i2++]; A%~t[ H
} Li\b,_C
} jOL=vG
lN_b&92
} \\Nt^j3qR
0RN7hpf&`
改进后的归并排序: SU(J
xN6}4JB
package org.rut.util.algorithm.support; fbkAu
f2k~(@!h
import org.rut.util.algorithm.SortUtil; DKG;up0
;bFd*8?;
/** ~l*[=0}
* @author treeroot >P-'C^:V=
* @since 2006-2-2 )ZpMB
* @version 1.0 x)f<lZ^L&H
*/ '~xiD?:
public class ImprovedMergeSort implements SortUtil.Sort { Sy^@v%P'A
Or-LQ^~
private static final int THRESHOLD = 10; a,e;(/#\7
n.1$p
/* uIR
* (non-Javadoc) _$KkSMA~_
* ;.7]zn.X]2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w} r mYQ
*/ J,k.*t:
public void sort(int[] data) { x#t?`
int[] temp=new int[data.length]; ;ih;8
mergeSort(data,temp,0,data.length-1); }{.V^;
} \# 1p
`8;\}6:"1
private void mergeSort(int[] data, int[] temp, int l, int r) { Kp6%=JjO
int i, j, k; iGNZC{
int mid = (l + r) / 2; 1:4u]$@E
if (l == r) E/_n}$Z
return; 8*eVP*g
if ((mid - l) >= THRESHOLD) h2 >a_0"
mergeSort(data, temp, l, mid); 35YDP|XZb
else 3C2~heO>|
insertSort(data, l, mid - l + 1); cd4HbSp
if ((r - mid) > THRESHOLD) )~#3A@
mergeSort(data, temp, mid + 1, r); 6`5DR~
else DK#Tr: 7
insertSort(data, mid + 1, r - mid); QV _aM2
_w7yfZLv+
for (i = l; i <= mid; i++) { h-\+# .YP
temp = data; *?o 'sTH
} %%lJyLq'Vk
for (j = 1; j <= r - mid; j++) { EH]qYF.
temp[r - j + 1] = data[j + mid]; TZarI-A
} }jYVB|2
int a = temp[l]; isz-MP$:K5
int b = temp[r]; {-yw@Kq
for (i = l, j = r, k = l; k <= r; k++) { YyC$\HH6
if (a < b) { >FL%H=]
data[k] = temp[i++]; ty8E;['
a = temp; "4.A@XsY
} else { ![m6$G{y
data[k] = temp[j--]; ilQt`-O!
b = temp[j]; //yz$d>JN
} [2z >8SL
} 8aW<lu
} >&Vz/0
Y7 e1%,$v
/** \sS0@gnDI
* @param data D`)K3;h
* @param l )yS8(F0
* @param i ](z*t+">
*/ OOzXA%<%c
private void insertSort(int[] data, int start, int len) { BKu<p<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O?iLLfs
} Xkf|^-n
} [vxHsY3z
} ubl)$jZ:Q
} _Pn 1n
(ZQ?1Qxo
堆排序： RHmT$^=
&cy<"y
package org.rut.util.algorithm.support; Dc0CQGx9b
eU\_m5xl"
import org.rut.util.algorithm.SortUtil; &PFK0tY
_[N*k"
/** fj[Kbo 7!h
* @author treeroot M} Mgz
* @since 2006-2-2 Zl?9ibm;@
* @version 1.0 , jCE hb
*/ kk}_AZ0eK
public class HeapSort implements SortUtil.Sort{ U"L-1]L
BxB B](
/* (non-Javadoc) zEw~t&:e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cw~fP[5XMF
*/ t_\&LMD
public void sort(int[] data) { Tj!rAMQk
MaxHeap h=new MaxHeap(); A&X XL~yH
h.init(data); 8*&YQId~
for(int i=0;i h.remove(); ,Eo\(j2F.
System.arraycopy(h.queue,1,data,0,data.length); (SByN7[gb
} J#\oc@
W4)bEWO+q
private static class MaxHeap{ yn.[-
cuL/y$+EY
void init(int[] data){ u"DE?
this.queue=new int[data.length+1]; CM)V^k*
for(int i=0;i queue[++size]=data; <>V~
fixUp(size); Ka$lNL3<j
} s$ ?;C
} [ZS.6{vr
x::d}PP7
private int size=0; ,?wxW
$5>m\wrl
private int[] queue; Nwk^r75lq
\Npvm49
public int get() { ow#8oUf=
return queue[1]; ]N:Wt2
} 0+AMN-
N\Ab0mDOV.
public void remove() { z</^qy
SortUtil.swap(queue,1,size--); 0R}hAK+| 4
fixDown(1); FhQb9\g
} "_:6v64Gx
file://fixdown yh.WTgcW
private void fixDown(int k) { 'a>D+A:
int j; aTs9lr:
while ((j = k << 1) <= size) { )*aAkM
if (j < size %26amp;%26amp; queue[j] j++; BqtN=
if (queue[k]>queue[j]) file://不用交换 p:3w8#)MZ
break; wcGv#J],
SortUtil.swap(queue,j,k); ^grDP*;W
k = j; UkC'`NWF*
} *T:jR
} m",G;VN
private void fixUp(int k) { N[N4!k )!$
while (k > 1) { ."`||@|
int j = k >> 1; 7t+H94KG7
if (queue[j]>queue[k]) t;_1/mt
break; (*\y
SortUtil.swap(queue,j,k); LdnTdh?
k = j; @@=,bO
} TW=N+ye^1(
} {,= hIXo>
-jVg{f!
} $_gv(&ZT
t<%+))b
} !(y(6u#
Bf" ZmG9
SortUtil： SBY0L.
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package org.rut.util.algorithm; 97pnq1b
)))AxgM
import org.rut.util.algorithm.support.BubbleSort; qos/pm$&i
import org.rut.util.algorithm.support.HeapSort; ~w(A3I.
import org.rut.util.algorithm.support.ImprovedMergeSort; W >|'4y)
import org.rut.util.algorithm.support.ImprovedQuickSort; Sp]ov:]%f
import org.rut.util.algorithm.support.InsertSort; Y@+9Ukd/
import org.rut.util.algorithm.support.MergeSort; [YJ*zO
import org.rut.util.algorithm.support.QuickSort; u\km_e
import org.rut.util.algorithm.support.SelectionSort; U@:l~xJ
import org.rut.util.algorithm.support.ShellSort; [~?6jnp
bG+Gg*0p
/** ,2P/[ :
* @author treeroot LN9.Q'@r?
* @since 2006-2-2 m;PTO$--
* @version 1.0 ^BP4l_rO9
*/ 1+Vei<H$
public class SortUtil { MPLeqk$;
public final static int INSERT = 1; tZ:fOM
public final static int BUBBLE = 2; ACF_;4%&
public final static int SELECTION = 3; .:tR*Kst`7
public final static int SHELL = 4; a&[>kO
public final static int QUICK = 5; ]NKz5[9D
public final static int IMPROVED_QUICK = 6; EW/NH&{
public final static int MERGE = 7; 'lmjZ{k
public final static int IMPROVED_MERGE = 8; l!ZzJ&
public final static int HEAP = 9; muO;g&
^tVIPH.R
public static void sort(int[] data) { +y][s{A
sort(data, IMPROVED_QUICK); Se(apQH
} &+GbklUB~
private static String[] name={ !ED,'d%J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5xa!L@)`wF
}; S4OOm[8
J$-1odL0Z
private static Sort[] impl=new Sort[]{ Y>K8^GS
new InsertSort(), nyOvB#f
new BubbleSort(), !RN9wXS7
new SelectionSort(), o@YEd d
new ShellSort(), r$%,k*X^ k
new QuickSort(), mOFp!(
new ImprovedQuickSort(), 2t7=GA+j
new MergeSort(), Ah zV?6e
new ImprovedMergeSort(), f?"909&
new HeapSort() fLV@~T|
}; ][~rk?YY
y/+y |.Xg
public static String toString(int algorithm){ uNpa2{S'
return name[algorithm-1]; F0'8n6zj
} lT'V=,Y t
f1U:_V^d
public static void sort(int[] data, int algorithm) { =-G4BQ
impl[algorithm-1].sort(data); Sf t,$
} ")w~pZE&+
u2*."W\
public static interface Sort { $C8s
public void sort(int[] data); q2M%AvR
} N]G`]
.G|U#%"6x
public static void swap(int[] data, int i, int j) { o^u}(wZ{
int temp = data; E%$[*jZ
data = data[j]; U)1hC^[!
data[j] = temp; SnoEi~Da
} ,;yaYF6|/
} t<cWMx5ra