[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; :3h{ A`u
} uRV<?y%
int i1=l; Av J4\
int i2=mid+1; +~zXDBS9
for(int cur=l;cur<=r;cur++){ ~`MS~,,
if(i1==mid+1) k"UO c=
data[cur]=temp[i2++]; l:B;zi`)oB
else if(i2>r) 1`0#HSO
data[cur]=temp[i1++]; #s-iy+/1oN
else if(temp[i1] data[cur]=temp[i1++]; Y-!YhWsS
else :a[Ihqfg
data[cur]=temp[i2++]; tA.`k;LT
} L71!J0@a#
} nSx8E7 |V
(t^n'V
} ~EiH-z4U
n||A" @b\
改进后的归并排序: ?i\;:<e4
uYI@9U
package org.rut.util.algorithm.support; y^>Q/H\
fT\:V5-
import org.rut.util.algorithm.SortUtil; )=pD%$iq
} l667N
/** }=](p-]5
* @author treeroot >pyj]y^3
* @since 2006-2-2 1Nn@L2b 2
* @version 1.0 Yf_6PGNzX
*/ ;r\(p|e
public class ImprovedMergeSort implements SortUtil.Sort { Z4TL6]^R
R6;Phdh<>
private static final int THRESHOLD = 10; b,H[I!. %
;zTuKex~
/* Ol/\t
* (non-Javadoc) 6aO2:|:yP
* +\ _{x/u1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @LE[ac
*/ f7urJ'!V
public void sort(int[] data) { X?r48l??
int[] temp=new int[data.length]; cV K7
mergeSort(data,temp,0,data.length-1); 0rSIfYZa
} \`.F\Z
+]xFoH
private void mergeSort(int[] data, int[] temp, int l, int r) { Pf_F59"
int i, j, k; 4p`XG1Pt
int mid = (l + r) / 2; #EO1`9f48x
if (l == r) 5FKBv e@
return; JNI>VP[c
if ((mid - l) >= THRESHOLD) ?WI3/>:<
mergeSort(data, temp, l, mid); I_)*)d44_
else fN%jJ-[d
insertSort(data, l, mid - l + 1); MZv]s
if ((r - mid) > THRESHOLD) UM%o\BiO
mergeSort(data, temp, mid + 1, r); FjfN3#qlg
else 9W7#u}Z
insertSort(data, mid + 1, r - mid); j|fd-<ng
le)DgIT>=
for (i = l; i <= mid; i++) { 8ip7^
temp = data; 5MTgK=c
} Lm*VN~2
for (j = 1; j <= r - mid; j++) { . v)mZp
temp[r - j + 1] = data[j + mid]; 0BPMmk
} ^>&k]T`
int a = temp[l]; NUJ~YWO;
int b = temp[r]; Wl"0m1G
for (i = l, j = r, k = l; k <= r; k++) { t G.(flW,
if (a < b) { m4w')r~
data[k] = temp[i++]; )emOKS
a = temp; t@oK~ Nr
} else { `iKj
data[k] = temp[j--]; * A|-KKo\
b = temp[j]; W`rNBfG>
} #G]!%
} FyL_xu\e
} yqOuX>m1c
4EP<tV
/** DC+wD Bp;
* @param data SS|z*h Z
* @param l ;oOv/3
* @param i }u{gR:lZ
*/ gYAF'?
private void insertSort(int[] data, int start, int len) { \,UZX&ip
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;;s* Ohh
} ,8G{]X)
} Y(VJbm`
} x|64l`Vp(:
} vEe NW
9.O8/0w7LV
堆排序： k,Qskd-N]
:c[n\)U[aa
package org.rut.util.algorithm.support; uwIc963
uYG^Pc^v
import org.rut.util.algorithm.SortUtil; WP**a Bp
Q/>L_S
/** I8Vb-YeS
* @author treeroot `<"m%>
* @since 2006-2-2 9Mm!%Hu
* @version 1.0 yR~-k?7b
*/ i7[uLdQ
public class HeapSort implements SortUtil.Sort{ `BFIC7a
~:Uwg+]j
/* (non-Javadoc) g&/p*c_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f3*?MXxb16
*/ K!AAGj`
public void sort(int[] data) { /(C~~XP)
MaxHeap h=new MaxHeap(); 7sNw
h.init(data); 1YxgR}7
for(int i=0;i h.remove(); H&}ipaDO
System.arraycopy(h.queue,1,data,0,data.length); ^t"iX9
} #<7O08:
o`,Qku k
private static class MaxHeap{ %i0?UpA
&sVvWNO#2
void init(int[] data){ lb'Cl3H
this.queue=new int[data.length+1]; `'_m\uo
for(int i=0;i queue[++size]=data; SU_SU".
fixUp(size); ~q0*"\Ff
} `Kl`VP=c
} a@d=>CT$
.4.pJbOg
private int size=0; c8 K3.&P6
3B0lb"e
private int[] queue; [t]X/O3<
f2)XP$:
public int get() { he3SR@\T
return queue[1]; rd|uz4d
} Z^KA
bBxw#_3A?E
public void remove() { G`=r^$.3WB
SortUtil.swap(queue,1,size--); 9<CG s3\
fixDown(1); "v*8_El
} L}{`h
file://fixdown \Xrw"\")j
private void fixDown(int k) { w*j$uW6{
int j; 0IM8
while ((j = k << 1) <= size) { "R #k~R
if (j < size %26amp;%26amp; queue[j] j++; woH)0v
if (queue[k]>queue[j]) file://不用交换 =/Aj
break; %T`U^Pnr
SortUtil.swap(queue,j,k); =wu*D5
k = j; 5m$2Ku
} i@"e,7mSG
} <pLT'Y=
private void fixUp(int k) { gW(gJ; L,%
while (k > 1) { {2'm^0Kl
int j = k >> 1; Jhkvd<L8`m
if (queue[j]>queue[k]) Fnx`Ri
break; J<j&;:IRd
SortUtil.swap(queue,j,k); T".]m7!
k = j; TTNkr`
} 8 }'|]JK
} 3. WF}8
8U2dcx:G3
} VU|dV\>
j|.} I
} V)o,1
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SortUtil： 2+8#H.
y9Y1PH7G
package org.rut.util.algorithm; ]bCq=6ZKR
] 7;f?+
import org.rut.util.algorithm.support.BubbleSort; kW=z+
import org.rut.util.algorithm.support.HeapSort; P%pp )BS
import org.rut.util.algorithm.support.ImprovedMergeSort; }WFf''Z-
import org.rut.util.algorithm.support.ImprovedQuickSort; }7<5hn E
import org.rut.util.algorithm.support.InsertSort; Hq&"+1F
import org.rut.util.algorithm.support.MergeSort; \~rlgxd
import org.rut.util.algorithm.support.QuickSort; "+"{+k5t
import org.rut.util.algorithm.support.SelectionSort; "GT4s?6O
import org.rut.util.algorithm.support.ShellSort; @!=\R^#p
{kI#A?M
/** {Ng oYl
* @author treeroot )+I.|5g
* @since 2006-2-2 ZBD;a;wx
* @version 1.0 R_P}~l
*/ &Jc_Fc(M
public class SortUtil { -XoPia2
public final static int INSERT = 1; pI`?(5iK6|
public final static int BUBBLE = 2; ~.Ik#At
public final static int SELECTION = 3; G* %t'jX9
public final static int SHELL = 4; wl=61Mb
public final static int QUICK = 5; -OZ 5vH0
public final static int IMPROVED_QUICK = 6; ^:, l\Y
public final static int MERGE = 7; RH0>ZZR
public final static int IMPROVED_MERGE = 8; c2l_$p
public final static int HEAP = 9; 2B~wHv
lkIn%=Z
public static void sort(int[] data) { z5\;OLJS,
sort(data, IMPROVED_QUICK); `XTh1Z\
} Upl6:xYrG
private static String[] name={ |rRO@18dA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OY-w?'p?W
}; zkM"cb13q/
.uo.N
private static Sort[] impl=new Sort[]{ C=Fzu&N}
new InsertSort(), |C \}P
new BubbleSort(), 4fV3Ear=j
new SelectionSort(), CLD-mx|?
new ShellSort(), _gNz9$S
new QuickSort(), 2U kK0ls
new ImprovedQuickSort(), rf+:=|/_3
new MergeSort(), n]W_e
new ImprovedMergeSort(), K?x,T8<aW
new HeapSort() pVp:@0h
}; `i~ Y Fr
x LBQ
public static String toString(int algorithm){ 6Sj6i^"
return name[algorithm-1]; ',7??Q7j&v
} ?VU(Pq*`
oj,lz?
public static void sort(int[] data, int algorithm) { FX<b:#
impl[algorithm-1].sort(data); }!#gu3
} W" "*ASi
<3PL@orO
public static interface Sort { u),Qa=Wp
public void sort(int[] data); TjK{9A
} YKZrEP4^
7)rWw<mY
public static void swap(int[] data, int i, int j) { WnFG{S{s
int temp = data; NIr@R7MKd
data = data[j]; k`HP"H
data[j] = temp; bSwWszd~
} ({0)@+V8
} v<\A%