[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; Io>U-Zd\>
} "}ur"bU1
int i1=l; gB+CM? LKq
int i2=mid+1; ~E_irzOFP
for(int cur=l;cur<=r;cur++){ vRD(* S9^
if(i1==mid+1) VS>hi~j
data[cur]=temp[i2++]; o1b.a*SZ
else if(i2>r) J7e/+W~
data[cur]=temp[i1++]; (~! @Uz5
else if(temp[i1] data[cur]=temp[i1++]; k>8OxpaWv?
else 'J!Gip ,
data[cur]=temp[i2++]; w)1SZ}
} rg#/kd<?[V
} Ol<LL#<j4
K`ygW|?gt
} {{[@ X
n<HF]
改进后的归并排序: \IzZJGi
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package org.rut.util.algorithm.support; b j<T`M!
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import org.rut.util.algorithm.SortUtil; eI|~neh
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/** R`@7f$;wG
* @author treeroot mz;ExV16
* @since 2006-2-2 O8rd*+
* @version 1.0 8^^ehaxy
*/ 9)j"|5H
public class ImprovedMergeSort implements SortUtil.Sort { '-G,7!.,r%
W=|'&UU Ul
private static final int THRESHOLD = 10; T2mZkK?rA
9c1q:>|
/* v]KPA.W
* (non-Javadoc) >SYOtzg%
* rEU1 VvE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !}1l8Y
*/ M$f_I +
public void sort(int[] data) { p!?7;
int[] temp=new int[data.length]; q?L*Luu+
mergeSort(data,temp,0,data.length-1); `fVzY"Qv k
} K+yi_n L
[r'hX#
private void mergeSort(int[] data, int[] temp, int l, int r) { SxC(:k2b;
int i, j, k; MzlE
int mid = (l + r) / 2; 0{?%"t\/f
if (l == r) +OB&PE
return; Q-U,1b
if ((mid - l) >= THRESHOLD) gKIN* Od
mergeSort(data, temp, l, mid); DAEWa Kui
else Xa&:Hg<
insertSort(data, l, mid - l + 1); U[#q"'P|l
if ((r - mid) > THRESHOLD) $.B}zY{
mergeSort(data, temp, mid + 1, r); ~ r$I&8
else _qQo}|/q
insertSort(data, mid + 1, r - mid); :n x;~f
7FP"]\x
for (i = l; i <= mid; i++) { ~$Z_#,|i?
temp = data; o i~,}E_
} "DJ%Yo
for (j = 1; j <= r - mid; j++) { kQ)2DCbdn
temp[r - j + 1] = data[j + mid]; ^4saB+qm
} DFGgyFay
int a = temp[l]; -**fT?n
int b = temp[r]; %]O#t<D
for (i = l, j = r, k = l; k <= r; k++) { ]7h;MR
if (a < b) { xz,M>Ua
data[k] = temp[i++]; dsbz\w3:
a = temp; a<V Mh79*
} else { 52.hJNq#L
data[k] = temp[j--]; VrFI5_M/
b = temp[j]; mj y+_
} o%Qn%gaX
} wo^1%:@/2
} ^$lsmF]^
2Ju,P_<dt
/** 6|%HCxWO
* @param data Ax!fvcsN
* @param l O}7aX '
* @param i \l 3M\$oS>
*/ s: MJ{r(s
private void insertSort(int[] data, int start, int len) { $5>x)jr:w+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,z0E2
} +6Vu]96=KC
} F0Z cV>j}
} mOYXd,xd
} 9x9E+DG#(
+Pn`AV1
堆排序： k_%maJkXp
a+\s0Qo<
package org.rut.util.algorithm.support; HMR!XF&JjC
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import org.rut.util.algorithm.SortUtil; Gv\fF;,R
nON"+c*
/** v/wR)9
* @author treeroot 6K9-n}z
* @since 2006-2-2 wtGb3D"am
* @version 1.0 /B
*/ jbTyM"Y
public class HeapSort implements SortUtil.Sort{ F=kiYa}
nSU7,K`PM
/* (non-Javadoc) W@FGU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c<qJs-C4;
*/ 6IM:Xj
public void sort(int[] data) { P99s
MaxHeap h=new MaxHeap(); 2{#=Ygb0
h.init(data); 8L(KdDY
for(int i=0;i h.remove(); g|4v>5Y
System.arraycopy(h.queue,1,data,0,data.length); Al]z=
} k:zGv
+;;pM[U
private static class MaxHeap{ m^,3jssdA
wijY]$
void init(int[] data){ 1) G6
this.queue=new int[data.length+1]; .s@[-! p
for(int i=0;i queue[++size]=data; #.\X%!
fixUp(size); N" oJ3-~
} ;4]l P
} (%;D& ~%o
]5J*UZ}
private int size=0; R )e^H
885 ,3AdA
private int[] queue; 22m'+3I~Y
2E3x=
public int get() { G{oM2`c'#8
return queue[1]; p&;,$KDA
} :~9F/Jx
w9a6F
public void remove() { MT@Uu
SortUtil.swap(queue,1,size--); SkA"MhX
fixDown(1); '~'3x4Bo
} %bUpVyi!(
file://fixdown ZsYT&P2
private void fixDown(int k) { x68s$H
int j; ~# |p=Y
while ((j = k << 1) <= size) { /d-7n|#E
if (j < size %26amp;%26amp; queue[j] j++; *CXVA&?
if (queue[k]>queue[j]) file://不用交换 \(ZOt.3!J
break; t\C[mw
SortUtil.swap(queue,j,k); YY<e]CriU
k = j; yh Ymbu
} gG=E2+=uy
} bDPT1A`F
private void fixUp(int k) { gs77")K&
while (k > 1) { /-ky'S9
int j = k >> 1; Z@`HFZJ
if (queue[j]>queue[k]) E^. =^bR
break; m,]M_y\u
SortUtil.swap(queue,j,k); 1{S" axSL
k = j; K&noA
} b}r3x&)
} ~UJ_Rr54
KcjP39@I
} I*K~GXWs#
DavG=kvd
} th*E"@
JEes'H}Y
SortUtil： z '%Vy
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package org.rut.util.algorithm; xTL"%'|
SLc'1{
import org.rut.util.algorithm.support.BubbleSort; 07+Qai-]
import org.rut.util.algorithm.support.HeapSort; 8~|PZ,oZ
import org.rut.util.algorithm.support.ImprovedMergeSort; Ie?C<(8Ul
import org.rut.util.algorithm.support.ImprovedQuickSort; `#lNur\x
import org.rut.util.algorithm.support.InsertSort; "L" 6jT
import org.rut.util.algorithm.support.MergeSort; W7"ks(
import org.rut.util.algorithm.support.QuickSort; oFV>b
import org.rut.util.algorithm.support.SelectionSort; #`4ma:Pj
import org.rut.util.algorithm.support.ShellSort; jM3{A;U2
<&rvv4*H
/** YvK8;<k@-?
* @author treeroot ?79ABm a
* @since 2006-2-2 Tce2]"^;
* @version 1.0 `D%bZ%25c
*/ Dl%NVi+n
public class SortUtil { Pw'3ya8
public final static int INSERT = 1; m.p{+_@M&
public final static int BUBBLE = 2; 8+1tys
public final static int SELECTION = 3; 7>J8\=
public final static int SHELL = 4; #\$R^u]!
public final static int QUICK = 5; 5!G}*u.
public final static int IMPROVED_QUICK = 6; OE/O:F:1j
public final static int MERGE = 7; @vaK-&|#$
public final static int IMPROVED_MERGE = 8; ]W%<<S
public final static int HEAP = 9; BUcze\+
e;<=aa)}?
public static void sort(int[] data) { !285=cxz
sort(data, IMPROVED_QUICK); wvA@\-.+
} amIG9:-1'
private static String[] name={ v>71?te
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i1?H*:]
}; iVt6rX
x,z+l-y
private static Sort[] impl=new Sort[]{ NQ!jkojD
new InsertSort(), Pz1pEyuL
new BubbleSort(), 2, ` =i
new SelectionSort(), [L,Tf_t^Y
new ShellSort(), ,r{\aW@
new QuickSort(), /AP@Bhm
new ImprovedQuickSort(), F"3PP ~
new MergeSort(), oToUpkAI
new ImprovedMergeSort(), @%K@oDL
new HeapSort() (&FSoe/!['
}; X/TuiKe
[(Pm\o
public static String toString(int algorithm){ @twClk.s
return name[algorithm-1]; (yCFpb
} [=-?n6
~fE@]~f>
public static void sort(int[] data, int algorithm) { ?*a:f"vQ
impl[algorithm-1].sort(data); @U(D&_H,K
} J]~LmSh
R$=UJ}>
public static interface Sort { w Maib3Q
public void sort(int[] data); vO"Sy{)Z>
} Z| Z447_
!t6:uC7H
public static void swap(int[] data, int i, int j) { ayuj)]b
int temp = data; A_}F
data = data[j]; K<KyX8$P0
data[j] = temp; QdL ;|3K9
} /PAxPZf_
} xGJ{_M