[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; y+!+ D[x
} J%V-Q>L
int i1=l; :*t"8;O[
int i2=mid+1; yvgrIdEP
for(int cur=l;cur<=r;cur++){ ,\X@~j
if(i1==mid+1) '#LQN<"4
data[cur]=temp[i2++]; lAzjN~V
else if(i2>r) uqM yoIc
data[cur]=temp[i1++]; qud\K+
else if(temp[i1] data[cur]=temp[i1++]; 2LNRtW*
else FvN<<&B
data[cur]=temp[i2++]; I96Ci2)m
} _8Z_`@0
} %Rz&lh/
` L>
} S5KEXnjm
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改进后的归并排序: 6}4'E
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package org.rut.util.algorithm.support; Dw=gs{8D
?|WoIV.
import org.rut.util.algorithm.SortUtil; 4Y,R-+f
+zrAG24q
/** zS\E/.X2
* @author treeroot 9Q(+ZG=JkV
* @since 2006-2-2 8%%f%y
* @version 1.0 Q?8R[i
*/ umF Z?a
public class ImprovedMergeSort implements SortUtil.Sort { NM]s8cK_
af#pR&4}
private static final int THRESHOLD = 10; O=v#{[
!lxTX
/* KBXK0zWh7
* (non-Javadoc) B.g[c97
* cCo`~7rE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AX?fuDLs
*/ p/JL9@:'
public void sort(int[] data) { U7!.,kR-
int[] temp=new int[data.length]; _<=S_<$2
mergeSort(data,temp,0,data.length-1); }"|"Q7H
} d)@<W1;
1z&Ly3
private void mergeSort(int[] data, int[] temp, int l, int r) { Ubh{!Y
int i, j, k; N;A@' tu8
int mid = (l + r) / 2; GwG4LIp
if (l == r) ,ldI2]
return; ndjx|s)E
if ((mid - l) >= THRESHOLD) lc2i`MC
mergeSort(data, temp, l, mid); :C}2=
else MZTx:EN!
insertSort(data, l, mid - l + 1); )I^2k4Cg"
if ((r - mid) > THRESHOLD) |J+(:{}~
mergeSort(data, temp, mid + 1, r); !).}u,*'no
else 'mH)d
insertSort(data, mid + 1, r - mid); :Xn7Ha[f
cTXri8K_
for (i = l; i <= mid; i++) { Rw6;Z
temp = data; &?uz`pv2
} *[r!
for (j = 1; j <= r - mid; j++) { 9Ro6fjjE
temp[r - j + 1] = data[j + mid]; eVt$7d?Jw
} wO:Sg=,
int a = temp[l]; Vs)--t
int b = temp[r]; @WQK>-=(3
for (i = l, j = r, k = l; k <= r; k++) { Vo9F
if (a < b) { Ti2Ls5H}
data[k] = temp[i++]; rwniOQe
a = temp; 5GA\xM-
} else { l"q1?kaVg
data[k] = temp[j--]; 277ASCWLkU
b = temp[j]; HxBm~Lcqy
} :d0Y%vl
} !" JfOu
} 6vp *9
KJ?y@Q
/** Fhv2V,nZ<
* @param data j}BHj.YuP
* @param l :qR=>n=
* @param i v}sY|p"
*/ Gy,u^lkk:
private void insertSort(int[] data, int start, int len) { (=16PYs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )jCo%P/
} 0l=+$&D
} O<jPGU
} x$wd O
} fa&-. *
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堆排序： Uu"0rUzt
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package org.rut.util.algorithm.support; 7l."b$U4yv
.c^ ggy%
import org.rut.util.algorithm.SortUtil; >sD4R}\})
~gI{\iNF/
/** W%e_~$H0
* @author treeroot x1gx$P
* @since 2006-2-2 b?Pj< tA
* @version 1.0 PF`rWw
*/ QC0!p"
public class HeapSort implements SortUtil.Sort{ 8L5!T6+D&
~:lKS;PRuK
/* (non-Javadoc) IN7<@OS7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fd8!KO
*/ /%n`V
public void sort(int[] data) { J^m<*
MaxHeap h=new MaxHeap(); 9 L?;FY)_
h.init(data); !umEyd@ "
for(int i=0;i h.remove(); T7$S_
System.arraycopy(h.queue,1,data,0,data.length); G",.,Px
} .wK1El{bf
Ybg-"w
private static class MaxHeap{ DlyMJ#a
O'NW Ebl/
void init(int[] data){ E-ZRG!)[v
this.queue=new int[data.length+1]; Vv*NFJ|
for(int i=0;i queue[++size]=data; %*z-PT22
fixUp(size); Uh|>Skic4
} 9.M{M06;
} kII7z;<^`
F6S~$<
private int size=0; X1A<$Am1
TSL9ax4j
private int[] queue; {UH9i'y:t
h<p3'
public int get() { 9 1P4:6
return queue[1]; BH@b1}
} ivrXwZ7jT
; !$m1
public void remove() { FA>1x*;c
SortUtil.swap(queue,1,size--); ErbSl
fixDown(1); ~U}Mv{y
} X QbNH~
file://fixdown aW{L7N%
private void fixDown(int k) { s&*yk p
int j; \&A+s4c")
while ((j = k << 1) <= size) { }X$l\pm
if (j < size %26amp;%26amp; queue[j] j++; rhY_|bi4P
if (queue[k]>queue[j]) file://不用交换 zTCP)x
break; 0^_MN~s(X
SortUtil.swap(queue,j,k); 'M'w,sID
k = j; RTd^ImV
} 73DlRt *
} aIvBY78o
private void fixUp(int k) { 2eok@1
while (k > 1) { rS~qi}4X
int j = k >> 1; Qp:6=o0:
if (queue[j]>queue[k]) p$!@I
break; Uh6mGLz*&
SortUtil.swap(queue,j,k); QjukK6#W
k = j; Ao`_",E
} Xt(! a
} P"4Mm, C
b!~TAT&8
} k\(4sY M
O@`J_9
} G:Hj;&'2
+G!v!(Ob+
SortUtil： nGZ\<-
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package org.rut.util.algorithm; z<QIuq
A#:8X1w
import org.rut.util.algorithm.support.BubbleSort; u[`v&e
import org.rut.util.algorithm.support.HeapSort; ??TdrTS
import org.rut.util.algorithm.support.ImprovedMergeSort; RV]a%mVlM
import org.rut.util.algorithm.support.ImprovedQuickSort; Gm@iV,F%R
import org.rut.util.algorithm.support.InsertSort; wF;B@
import org.rut.util.algorithm.support.MergeSort; B007x{-L
import org.rut.util.algorithm.support.QuickSort; ~|=rwDBZ8l
import org.rut.util.algorithm.support.SelectionSort; ]S]"`;Wh
import org.rut.util.algorithm.support.ShellSort; ;E2kT GT
K50t%yu#T]
/** El1:?4;
* @author treeroot '^lUL) R
* @since 2006-2-2 s;>VeD)*)
* @version 1.0 w&+\Wo;([b
*/ ;E2~L
public class SortUtil { JB'qiuhab
public final static int INSERT = 1; 9C1b^^Kb
public final static int BUBBLE = 2; bQ=s8'
public final static int SELECTION = 3; 4d6% t2
public final static int SHELL = 4; 67ZYtA|t
public final static int QUICK = 5; %d-`71|lG^
public final static int IMPROVED_QUICK = 6; >~>{;Wq(p+
public final static int MERGE = 7; L+(C5L93}
public final static int IMPROVED_MERGE = 8; 1[[TB .xF
public final static int HEAP = 9; iZu:uMoc
X#Ak'%J
public static void sort(int[] data) { I<9n(rA
sort(data, IMPROVED_QUICK); H&u4v2
} e7hO;=?b'
private static String[] name={ 0JrK/Ma3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?bn;{c;E
}; 8t--#sDy{0
[ArO$X3\
private static Sort[] impl=new Sort[]{ bA0uGLc
new InsertSort(), s|BX>1
new BubbleSort(), f^ywW[dF
new SelectionSort(), AE]i V{p
new ShellSort(), Qlf 9]ug)
new QuickSort(), PGMv(}%;
new ImprovedQuickSort(), Sn+FV+D
new MergeSort(), olHH9R9:
new ImprovedMergeSort(), rSzQUn<
new HeapSort() 5_PWGaQa
}; {rtM%%l
;!^ +N
public static String toString(int algorithm){ Gmqs`{tc
return name[algorithm-1]; ^#}dPGm
} (q~R5)D
JgxE|#*7U
public static void sort(int[] data, int algorithm) { ^!$} BY
impl[algorithm-1].sort(data); >~.Zr3P6kC
} Kp$_0
|R[v@c`pn
public static interface Sort { 9*7Hoi4Ji
public void sort(int[] data); 9"[!EKW
} FLi(#9
>cBGw'S
public static void swap(int[] data, int i, int j) { k, $I59
int temp = data; oqm
data = data[j]; 03PN{<
data[j] = temp; M@',3
} HGU?bJ~6o
} BUcaj.S