[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; Fh.ZsPn,m
} `>`{DEDx{5
int i1=l; EHt(!;?q
int i2=mid+1; &y~GTEP
for(int cur=l;cur<=r;cur++){ S|_lbMZM
if(i1==mid+1) ZMch2 U8
data[cur]=temp[i2++]; 3UJSK+d\
else if(i2>r) ak(P<OC-
data[cur]=temp[i1++]; #}8gHI-9%
else if(temp[i1] data[cur]=temp[i1++]; mMad1qCi7
else 5 Praj
data[cur]=temp[i2++]; >n>gX/S<C
} 6!RKZj)
} 8HdjZ!
,m)YL>k
} ~uJO6C6A
i\\,Z L
改进后的归并排序: MUp{2_RA
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package org.rut.util.algorithm.support; q)]S:$?BT
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import org.rut.util.algorithm.SortUtil; u~27\oj,
~<=wTns!
/** 8uB6C0,6?
* @author treeroot , ins/-3
* @since 2006-2-2 h8HA^><Xr
* @version 1.0 z4(Q.0x7
*/ \p!mX|
public class ImprovedMergeSort implements SortUtil.Sort { BR0P :h
T2k# "zD
private static final int THRESHOLD = 10; w5mSoKb
( z.\,M
/* Yd<q4VJR
* (non-Javadoc) SY+$8^
* xx,|n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \05 n$.
*/ T?8N$J
public void sort(int[] data) { pg4jPuCM
int[] temp=new int[data.length]; 1Gk'f?dw
mergeSort(data,temp,0,data.length-1); lLuAgds`
} n}q/:|c
m H&WoL<K
private void mergeSort(int[] data, int[] temp, int l, int r) { E XQ3(:&
int i, j, k; $-_@MT~
int mid = (l + r) / 2; Ga$EM
if (l == r) @ {8xL
return; vce1'aW
if ((mid - l) >= THRESHOLD) 3HB(rTw
mergeSort(data, temp, l, mid); Ndqhc
else W$u/tRF
insertSort(data, l, mid - l + 1); 3?yq*uE}
if ((r - mid) > THRESHOLD) .KE2sodq
mergeSort(data, temp, mid + 1, r); c+]5[6
else YDiru
insertSort(data, mid + 1, r - mid); hkR Jqta)
q=uJ^N
for (i = l; i <= mid; i++) { mV'^4by
temp = data; [214b=
} wTu=v
for (j = 1; j <= r - mid; j++) { 7f q\ H{
temp[r - j + 1] = data[j + mid]; M1=y-3dW3
} #W=H)6
int a = temp[l]; qvN 5[rb
int b = temp[r]; F$H^W@<w
for (i = l, j = r, k = l; k <= r; k++) { OEj%cB!
if (a < b) { GZNfx8zsY+
data[k] = temp[i++]; Dq~D4|
a = temp; !\N|$-M
} else { FLOSdMYdw
data[k] = temp[j--]; T~-PT39E
b = temp[j]; Z/=HQ8
} k[;(@e@c
} Ih5F\eM
} H%`|yUE(
/mFa*~dj2
/** g+92}$_
* @param data vhu5w#]u*
* @param l :X~{,J
* @param i )x&OdFX
*/ &oqzQ+H
private void insertSort(int[] data, int start, int len) { 9N{"ob Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NW@guhK.
} .eM A*C~n
} (%f2ZNen
} (= ,w$
} rQD7ZN_ R
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堆排序： gIaPS0Q
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package org.rut.util.algorithm.support; Z\P&i#
tz"zQC$
import org.rut.util.algorithm.SortUtil; b>"=kN/
B3iU#
/** 9W@Tf
* @author treeroot Fwv(J_'q
* @since 2006-2-2 fW.)!EPO
* @version 1.0 p}R3AJ
*/ qox31pnS
public class HeapSort implements SortUtil.Sort{ %y}l^P5z
z2.ZxL"*
/* (non-Javadoc) dzwto;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~V<62"G
*/ G9i?yd4n=B
public void sort(int[] data) { (3M7RpsL@
MaxHeap h=new MaxHeap(); U `<?~Bz
h.init(data); \%011I4
for(int i=0;i h.remove(); S)[$F}
System.arraycopy(h.queue,1,data,0,data.length); tcU4$%H/
} Af_yb`W?
q(cSHHv+
private static class MaxHeap{ W-ll2b
#-Nc1+gu
void init(int[] data){ >@NGX-gp
this.queue=new int[data.length+1]; 8q#Be1u<s2
for(int i=0;i queue[++size]=data; $f]dL};
fixUp(size); YXWlg%s
} J`4{O:{4
} 5(sWV:_2
gXI8$W>
private int size=0; t=$Hv
ON/U0V:v
private int[] queue; rq>OmMQ67
-{'WIGm
public int get() { wX*F'r"z
return queue[1]; F-2&P:sjQ
} i VIpe
v&i,}p^M5
public void remove() { T1Y_Jf*KJ
SortUtil.swap(queue,1,size--); l&1R`gcW
fixDown(1); nofK(0TF
} juc;]CHt'
file://fixdown geB]~/-p
private void fixDown(int k) { Ue22,Pp6
int j; -^%YrWgd?
while ((j = k << 1) <= size) { $"G=r(MW
if (j < size %26amp;%26amp; queue[j] j++; EZvf\s>LT
if (queue[k]>queue[j]) file://不用交换 qkbxa?&X
break; )0W-S9e<
SortUtil.swap(queue,j,k); urK[v
k = j; =-U8^e_Y
} YKT=0
} IJt8* cw
private void fixUp(int k) { 9:tn!<^=I
while (k > 1) { #fR~7KR
int j = k >> 1; XY1eeB-
if (queue[j]>queue[k]) nm597WeZp
break; 8hx 3pvmk
SortUtil.swap(queue,j,k); Rg?m$$X`
k = j; ~9KxvQzt
} 1-M\K^F
} \P` mV9P
@s2<y@
} M:? :EJ
f^63<gqY
} S=bdue
^Gs=U[**
SortUtil： %[9d1F3
~HH6=qjU)
package org.rut.util.algorithm; ;5fq[v^P:
4dwG6-
import org.rut.util.algorithm.support.BubbleSort; :UgCP ~Y
import org.rut.util.algorithm.support.HeapSort; 2l9RU}
import org.rut.util.algorithm.support.ImprovedMergeSort; Z7t-{s64
import org.rut.util.algorithm.support.ImprovedQuickSort; 0=^A{V!m
import org.rut.util.algorithm.support.InsertSort; M>BcYbXf
import org.rut.util.algorithm.support.MergeSort; }JKK"d}U
import org.rut.util.algorithm.support.QuickSort; BCK0fk~
import org.rut.util.algorithm.support.SelectionSort; A!&hjV`
import org.rut.util.algorithm.support.ShellSort; 6-\ghPo
K!MIA
/** ,:e##g~k
* @author treeroot 7sci&!.2`
* @since 2006-2-2 ,`ZIW
* @version 1.0 tb@&!a$`?
*/ .;&1"b8G
public class SortUtil { psHW(Z8G
public final static int INSERT = 1; oMj;9,WK'
public final static int BUBBLE = 2; JNYFu0
public final static int SELECTION = 3; jml 4YaGZ
public final static int SHELL = 4; 5|E_ ,d!v
public final static int QUICK = 5; c5t],P
public final static int IMPROVED_QUICK = 6; >pV|c\
public final static int MERGE = 7; `zJTVi4
public final static int IMPROVED_MERGE = 8; >sL"HyY#H
public final static int HEAP = 9; `V1D&}H+G
rprtp5Cg
public static void sort(int[] data) { xxN=,p
sort(data, IMPROVED_QUICK); wwtk6;8@
} mz~aSbb|
private static String[] name={ i9FHEu_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [e:mRMi
}; [aK7v{Wu
Ew|VDD(.
private static Sort[] impl=new Sort[]{ _m+64qG_8'
new InsertSort(), BrQXSN$i
new BubbleSort(), 6H\apgHm
new SelectionSort(), X~ AE??
new ShellSort(), '<35XjW
new QuickSort(), c8'!>#$
new ImprovedQuickSort(), )OAd[u<
new MergeSort(), M@n9i@UsO
new ImprovedMergeSort(), AJ*FQo.U
new HeapSort() AIR\>.~"i*
}; Q'ok%9q!p
xgi/,Nk '
public static String toString(int algorithm){ fA]b'8
return name[algorithm-1]; )aOPR|+
} HktvUJ(Ii
-|l^- Qf!
public static void sort(int[] data, int algorithm) { Q@in?};
impl[algorithm-1].sort(data); 1Ue;hu'q:
} V*m@Rs!)2
G@O~*k1v
public static interface Sort { <L1;aNN
public void sort(int[] data); IfH*saN7
} BmRk|b
\Ami-<T
public static void swap(int[] data, int i, int j) { MMpGI^x!-X
int temp = data; L;7x2&
data = data[j]; T-: @p>
data[j] = temp; YmS}*>oz
} f,?P1D\
} ]&')#YO